Integrated structure of venting plug and oil drain plug of oil guide pipeline of transformer

Abstract

The utility model relates to the technical field of transformer equipment, and discloses an integrated structure of a venting plug and an oil drain plug of an oil conduit of a transformer, which comprises a combined cover plate, a venting valve and an oil drain valve, a cylinder is horizontally arranged, one end of the cylinder is connected with the oil conduit through a flange, and the other end of the cylinder is closed through the cover plate to form a stable axial support structure. The butt joint of the flange and the oil guide pipeline ensures the stability of the connector of the oil guide pipeline; the pipe joints symmetrically arranged at the upper end and the lower end of the cylinder body are integrated with mounting connectors of the exhaust valve and the oil drain valve respectively, a traditional threaded plug structure is replaced through collaborative design of the combined cover plate and the valve, high efficiency and sealing reliability of exhaust and oil drain operation of the transformer oil guide pipe are achieved, and the operation process is simplified; the cylinder body and the cover plate are detachably connected, the cover plate, the cylinder body and the valve can be independently replaced in cooperation with the design of independent valve connectors of the upper pipe connector and the lower pipe connector, the whole pipeline structure does not need to be damaged, maintenance convenience is remarkably improved, and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of transformer equipment technology, specifically relating to an integrated structure of a transformer oil guide pipe vent plug and an oil drain plug. Background Technology

[0002] In the traditional design of transformer oil conduits, threaded plugs and plug seats are often used to achieve venting and oil draining functions. For example... Figure 1 In the conventional plug-type structure shown, the vent plug 9 and the oil drain plug 10 are screwed into the oil guide line 7 via threads. However, this structure has some drawbacks in practical applications.

[0003] First, maintenance is inconvenient. Frequent disassembly and reassembly of the threaded plug can easily lead to stripping between the plug and the seat, or even sealing failure. Furthermore, specialized tools are required for these operations, making the process time-consuming and adding to the inconvenience. Second, component replacement is difficult. The plug seat is usually directly connected to the pipeline by welding. When the plug seat is damaged, the entire connected pipeline often needs to be replaced to ensure the normal operation of the oil conduit, significantly increasing replacement costs. Finally, sealing performance is poor. With prolonged operation, the gasket, a key component ensuring sealing performance, is prone to aging due to long-term exposure to oil corrosion, pressure changes, and other factors. Once the gasket ages, the risk of oil leakage increases significantly, posing a potential threat to the normal operation of the transformer. Summary of the Invention

[0004] The purpose of this utility model is to overcome the above-mentioned problems and provide an integrated structure of vent plug and drain plug for transformer oil conduit, which can achieve high efficiency, maintainability and sealing reliability of venting and draining operations in transformer oil conduit.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides an integrated structure of a transformer oil guide pipe vent plug and an oil drain plug, including a combined cover plate. The combined cover plate includes a cylinder, a flange, a cover plate, and pipe joints. The cylinder is horizontally arranged, with a flange at one end and a cover plate detachably installed at the other end. The flange is connected to an oil guide pipe. The pipe joints are symmetrically arranged at the upper and lower ends of the cylinder, and the pipe joints are respectively connected to an vent valve and an oil drain valve.

[0007] A further improvement of this utility model is that the cylinder, flange and cover plate are arranged concentrically.

[0008] A further improvement of this utility model is that the inner diameter of the cylinder is the same as the inner diameter of the oil guide pipe, and the inner diameter of the flange is larger than the outer diameter of the cylinder.

[0009] A further improvement of this utility model is that the flange and the pipe joint are both fixedly connected to the cylinder by welding.

[0010] A further improvement of this invention is that the diameter of the cover plate is larger than the inner diameter of the cylinder.

[0011] A further improvement of this utility model is that the pipe joint is fixedly connected to the exhaust valve and the drain valve by fasteners.

[0012] A further improvement of this invention is that both the exhaust valve and the drain valve are ball valves.

[0013] A further improvement of this utility model is that a sealing gasket is provided between the pipe joint and the exhaust valve and the oil drain valve.

[0014] A further improvement of this invention is that the sealing gasket is fixedly connected by threads.

[0015] A further improvement of this utility model is that one end of the oil guide pipeline is equipped with the original flange, the flange is connected to the original flange by bolts, and a sealing gasket is installed on the connection end face of the flange and the original flange.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model provides an integrated structure for the vent plug and drain plug of a transformer oil conduit. By arranging the cylinder horizontally, one end of the cylinder is tightly connected to the oil conduit via a flange, and the other end is sealed by a cover plate, forming a stable axial support structure. The connection between the flange and the oil conduit ensures the stability of the oil conduit interface. The pipe joints symmetrically arranged at the upper and lower ends of the cylinder integrate the installation interfaces of the vent valve and the drain valve, respectively. Through the coordinated design of the combined cover plate and valve, the traditional threaded plug structure is replaced, which not only achieves high efficiency and reliable sealing of the transformer oil conduit venting and draining operations, but also simplifies the operation process. The cylinder and the cover plate adopt a detachable connection method. With the independent valve interface design of the upper and lower pipe joints, the cover plate, cylinder and valve can be replaced individually without damaging the overall pipeline structure, which significantly improves the convenience of maintenance and reduces maintenance costs.

[0018] Furthermore, the concentric arrangement of the cylinder, flange, and cover plate ensures uniform stress on the structure through axial alignment, reducing the risk of seal failure caused by off-center loading. At the same time, it optimizes the fitting accuracy between components and improves the overall sealing reliability of the structure.

[0019] Furthermore, the inner diameter of the cylinder is the same as that of the oil pipeline, which ensures the continuity and smoothness of oil flow and avoids turbulence or pressure loss caused by abrupt changes in cross-section. The inner diameter of the flange is larger than that of the cylinder, which provides sufficient installation contact surface for the connection between the flange and the oil pipeline, avoids the risk of interference when assembling the cylinder and the flange, and enhances the overall load-bearing stability of the structure.

[0020] Furthermore, both the exhaust valve and the drain valve are ball valves. The design of ball valves makes them quick to open and close, easy to operate, and they have excellent sealing performance, which can effectively prevent media leakage. Ball valves are compact in structure, durable, and suitable for frequent opening and closing scenarios, while simplifying maintenance procedures and reducing the risk of failure.

[0021] Furthermore, sealing gaskets are installed between the pipe joint and the exhaust valve and drain valve. The sealing gaskets can effectively fill the interface gap, enhance the fit of the sealing surface, and prevent oil or gas leakage. The elastic deformation capacity of the sealing gaskets can compensate for the small displacement caused by component processing errors and changes in operating conditions, ensuring long-term sealing stability. At the same time, it is convenient to replace the gaskets individually during disassembly and maintenance, reducing the risk of seal failure. Attached Figure Description

[0022] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the present invention and do not specifically limit the shapes and proportions of the components of the present invention.

[0023] Figure 1 This is a schematic diagram of a traditional plug-type structure;

[0024] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the combined cover plate structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the flange structure of this utility model.

[0027] The components are: 1. cylinder; 2. flange; 3. cover plate; 4. pipe joint; 5. vent valve; 6. drain valve; 7. oil guide pipeline; 8. original cover plate; 9. vent plug; 10. drain plug; 11. original flange. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The present invention will now be described in further detail with reference to the accompanying drawings:

[0035] like Figures 2 to 4 As shown, this utility model provides an integrated structure of a transformer oil guide pipe vent plug and an oil drain plug, including a cylinder 1, a flange 2, a cover plate 3, a pipe joint 4, a vent valve 5, an oil drain valve 6, and an oil guide pipe 7, wherein the cylinder 1, flange 2, cover plate 3, and pipe joint 4 constitute a combined cover plate.

[0036] The cylinder 1 is horizontally set. A flange 2 is welded to one end of the cylinder 1, and a cover plate 3 is detachably installed at the other end of the cylinder 1. The flange 2 is connected to the oil guide pipe 7 by bolts. Pipe joints 4 are symmetrically welded to the upper and lower ends of the cylinder 1. Pipe joints 4 are fixedly connected to the exhaust valve 5 and the oil drain valve 6 by fasteners, which not only ensures the independence and consistency of valve installation, but also realizes the flexibility of individual valve replacement.

[0037] Preferably, the cylinder 1, flange 2 and cover plate 3 are arranged concentrically. The alignment of the axes ensures uniform stress on the structure, reduces the risk of seal failure caused by off-center loading, and optimizes the fitting accuracy between components, thereby improving the sealing reliability of the overall structure.

[0038] It should be noted that the number of pipe joints 4, exhaust valves 5 and drain valves 6 can be increased or decreased according to the actual situation, as long as the structural sealing requirements and media discharge requirements are met.

[0039] The inner diameter of the cylinder 1 is the same as the inner diameter of the oil guide pipe 7. One end of the oil guide pipe 7 is equipped with the original flange 11. The flange 2 is connected to the original flange 11 by bolts, and a sealing gasket is installed on the connection end face of the flange 2 and the original flange 11 to ensure the sealed connection between the cylinder 1 and the oil guide pipe 7, ensuring the continuity and smoothness of oil flow and avoiding turbulence or pressure loss caused by abrupt changes in cross-section. In addition, the inner diameter of the flange 2 is larger than the outer diameter of the cylinder 1, which not only provides sufficient installation contact surface for the connection between the flange 2 and the oil guide pipe 7, but also avoids the risk of interference when assembling the cylinder 1 and the flange 2, while enhancing the overall load-bearing stability of the structure.

[0040] Sealing gaskets are installed between pipe joint 4 and exhaust valve 5 and drain valve 6, and are fixed by threaded or flanged connections. The sealing gaskets fill the gaps between the contact surfaces, enhance the sealing performance and prevent media leakage. The threaded or flanged connections provide reliable mechanical fastening force to ensure the stability of the valve under opening, closing or vibration conditions, while retaining disassembly to facilitate the replacement of the sealing gaskets or valves individually, simplifying the maintenance process, and adapting to the needs of different installation scenarios.

[0041] Both the exhaust valve 5 and the drain valve 6 are ball valves. The design of the ball valve makes it quick to open and close and easy to operate. In addition, the ball valve has excellent sealing performance, which can effectively prevent media leakage. The ball valve has a compact structure and strong durability, making it suitable for frequent opening and closing scenarios. At the same time, it simplifies the maintenance process and reduces the risk of failure.

[0042] The diameter of the cover plate 3 is larger than the inner diameter of the cylinder 1, so that the cover plate 3 can completely cover the end face of the cylinder 1 and form a sufficient sealing contact area, ensuring that the edge of the cover plate 3 is evenly stressed when connected to the cylinder 1, and preventing sealing failure caused by local compression.

[0043] How to use

[0044] This utility model discloses an integrated structure of a vent plug and a drain plug for a transformer oil conduit. First, the original cover plates 8 at both ends of the oil conduit 7 are removed, residual sealing material on the end face of the oil conduit 7 is cleaned, and the flatness of the contact surface is checked. The cylinder 1 is placed horizontally, aligning the flange 2 with the original flange 11 of the oil conduit 7. After inserting the sealing gasket, it is pre-tightened with bolts, and the bolts are gradually tightened in a symmetrical sequence to ensure uniform pressure on the sealing gasket. Then, the vent valve 5 and the drain valve 6 are aligned with the pipe joints 4 at the upper and lower ends of the cylinder 1, respectively, and tightened with bolts or flanges. The alignment of the valve and pipe joint 4 axis is checked to avoid misalignment. The vent valve 5 and the drain valve 6 are closed, oil is injected into the oil conduit 7 and pressurized, and the vent valve 5 is opened sequentially to release the gas in the oil conduit 7. The drain valve 6 is then opened to verify the smoothness of oil discharge. With the valves closed, the sealing surfaces at the connection points of the flange 2, cover plate 3, and pipe joint 4 are observed to be leak-free. After confirming there are no abnormalities, the installation is complete.

[0045] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of this teaching should not be determined by reference to the foregoing description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed utility model subject matter.

[0046] The above content provides a further detailed description of this utility model. It should not be considered that the specific embodiments of this utility model are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all such deductions or substitutions should be considered to fall within the scope of protection of this utility model as defined by the submitted claims.

Claims

1. An integrated structure of a vent plug and a drain plug in a transformer oil conduit, characterized in that, The system includes a combined cover plate, which includes a cylinder (1), a flange (2), a cover plate (3), and a pipe joint (4). The cylinder (1) is horizontally arranged, and a flange (2) is provided at one end of the cylinder (1). The cover plate (3) is detachably installed at the other end of the cylinder (1). The flange (2) is connected to an oil guide pipe (7). The pipe joint (4) is symmetrically arranged at the upper and lower ends of the cylinder (1). The pipe joint (4) is connected to an exhaust valve (5) and an oil drain valve (6), respectively.

2. The integrated structure of the transformer oil guide pipe vent plug and drain plug according to claim 1, characterized in that, The cylinder (1), flange (2) and cover plate (3) are arranged concentrically.

3. The integrated structure of the transformer oil guide pipe vent plug and drain plug according to claim 1, characterized in that, The inner diameter of the cylinder (1) is the same as the inner diameter of the oil pipeline (7), and the inner diameter of the flange (2) is greater than the outer diameter of the cylinder (1).

4. The integrated structure of the vent plug and drain plug in the transformer oil conduit according to claim 1, characterized in that, The flange (2) and pipe fitting (4) are both fixedly connected to the cylinder (1) by welding.

5. The integrated structure of the vent plug and drain plug in the transformer oil conduit according to claim 1, characterized in that, The diameter of the cover plate (3) is greater than the inner diameter of the cylinder (1).

6. The integrated structure of the vent plug and drain plug in the transformer oil conduit according to claim 1, characterized in that, The pipe fitting (4) is fixedly connected to the exhaust valve (5) and the drain valve (6) by fasteners.

7. The integrated structure of the vent plug and drain plug in the transformer oil conduit according to claim 1, characterized in that, Both the exhaust valve (5) and the drain valve (6) are ball valves.

8. The integrated structure of the vent plug and drain plug in the transformer oil conduit according to claim 1, characterized in that, A sealing gasket is provided between the pipe joint (4) and the exhaust valve (5) and the oil drain valve (6).

9. The integrated structure of the vent plug and drain plug in the transformer oil conduit according to claim 8, characterized in that, The sealing gasket is fixedly connected by threads.

10. The integrated structure of the vent plug and drain plug in the transformer oil conduit according to claim 1, characterized in that, One end of the oil guide pipeline (7) is equipped with the original flange (11), the flange (2) is connected to the original flange (11) by bolts, and a sealing gasket is installed on the connection end face of the flange (2) and the original flange (11).

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