Oil-saving oil-immersed transformer with good sealing performance

Abstract

The utility model discloses a well-sealed oil-saving type oil-immersed transformer, and particularly relates to the technical field of transformers, the well-sealed oil-saving type oil-immersed transformer comprises a transformer body, an oil conservator, corrugated flexible pipes and a double-layer protection assembly, the oil conservator is installed on the opposite face of a supporting plate, and the corrugated flexible pipes are arranged at the upper end of the transformer body and one side of the oil conservator respectively; the double-layer protection assembly is arranged above one group of corrugated flexible pipes; the corrugated flexible pipe can keep elasticity within a certain range, so that the corrugated flexible pipe can adapt to the change of a connecting part caused by temperature change, vibration or mechanical movement, vibration and impact are effectively absorbed, stress concentration caused by pipeline vibration is reduced, the risk of fracture or leakage of the connecting part is reduced, and the service life of the pipeline is prolonged. A good sealing effect is kept without being affected, an additional protection layer is provided through the double-layer protection assembly, and even if leakage occurs in the inner-layer connecting pipe, the outer-layer connecting pipe can still prevent oil liquid from being directly leaked into the environment.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and more particularly to an oil-saving oil-immersed transformer with good sealing. Background Art

[0002] Transformers can be divided into dry-type transformers, oil-immersed transformers and gas-filled transformers according to their insulation methods. Among them, oil-immersed transformers have the characteristics of easy maintenance, low cost and wide application range, and have been widely used in the power industry.

[0003] After searching, an existing patent (publication number: CN113488313B) discloses an oil-immersed transformer, including an oil-immersed transformer body, a protruding rod, a plug plate, a heat dissipation mechanism, and a second oil pump. The left side of the oil-immersed transformer body is snap-connected to a support frame, and the heat dissipation mechanism is fixed to the front and rear sides of the heat-conducting frame. The inner bottom of the oil storage barrel is fixed to a first oil pump, and the first connecting pipe runs through the right side of the oil storage barrel and is connected to the oil delivery pipe via a pipe clamp. The second oil pump is fixed to the left side of the inner bottom of the oil-immersed transformer body, and the second connecting pipe runs through the left side of the oil-immersed transformer body and is connected to the return pipe via a pipe clamp. In this oil-immersed transformer, during the process of oil circulating in the oil-immersed transformer body and the oil storage barrel, the heat of the oil in the oil storage barrel can be transferred to the heat-conducting frame and the heat-conducting plate in turn. At this time, the heat dissipation fan blows air towards the heat-conducting plate, so that the oil can be effectively cooled and dissipated, thereby continuously cooling and dissipating the heat of the oil-immersed transformer body. In the process of realizing this utility model, the inventor found that the existing technology has the following problems:

[0004] In existing oil-immersed transformers, the oil pipes connected to the transformers are subject to varying degrees of pressure changes and vibration during operation. During long-term operation, the stress generated by the pressure changes will cause loads on the joints, making them prone to fatigue damage, cracks, or loose joints, which can lead to oil leakage.

[0005] Therefore, in order to solve the above problems, a well-sealed oil-immersed transformer with fuel-saving function is proposed. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides an oil-saving oil-immersed transformer with good sealing to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a well-sealed, oil-saving, oil-immersed transformer, comprising a transformer body, an oil pillow, a corrugated flexible tube, and a double-layer protection assembly, wherein a support plate is provided on the right side of the upper end of the transformer body, the support plates being provided in two groups, the oil pillow being mounted on opposite sides of the support plates, the corrugated flexible tube being provided at the upper end of the transformer body and on one side of the oil pillow, respectively, and the double-layer protection assembly being provided above one group of the corrugated flexible tubes;

[0008] The double-layer protection component includes an inner connecting pipe, which is installed between two groups of corrugated flexible pipes. The outer surface of the inner connecting pipe is sleeved with an outer connecting pipe. Connecting flanges are provided at both ends of the outer connecting pipe, and the outer surface of the outer connecting pipe is sleeved with a braided layer.

[0009] Preferably, a high-voltage terminal is provided behind the upper end of the transformer body, and a low-voltage terminal is provided in front of the high-voltage terminal.

[0010] Preferably, the outer surface of the transformer body is provided with heat dissipation pipes, and the heat dissipation pipes are provided in several groups. Base mounting frames are provided on both sides of the lower end of the transformer body.

[0011] Preferably, the two groups of connecting flanges are connected to the two groups of corrugated flexible pipes respectively by bolts, and the outer surfaces of the corrugated flexible pipes, the inner connecting pipes and the outer connecting pipe bodies are all corrugated structures that can be adaptively bent.

[0012] Preferably, the braided layer is made of stainless steel wire and braided around the outer surface of the outer connecting tube, and the two ends of the oil pillow are respectively in contact with the two groups of support plates.

[0013] Preferably, the high-voltage wiring terminals and the low-voltage wiring terminals are each provided in three groups, and the three groups of the high-voltage wiring terminals and the three groups of the low-voltage wiring terminals are arranged at equal intervals.

[0014] Technical effects and advantages of this utility model:

[0015] 1. Compared with the existing technology, this well-sealed fuel-saving oil-immersed transformer can maintain elasticity within a certain range through the corrugated flexible pipe, thereby being able to adapt to changes in the connection parts caused by temperature changes, vibration or mechanical movement, effectively absorb vibration and impact, reduce stress concentration caused by pipeline vibration, reduce the risk of rupture or leakage in the connection parts, and maintain a good sealing effect.

[0016] 2. Compared with the existing technology, this well-sealed, fuel-saving oil-immersed transformer provides an additional layer of protection through the double-layer protection component. Even if the inner connecting pipe leaks, the outer connecting pipe can still prevent the oil from leaking directly into the environment, thereby avoiding oil contamination and potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0018] Figure 2 This is a schematic diagram of the front cross-section structure of the double-layer protection component of the utility model.

[0019] Figure 3 For this utility model Figure 1 Schematic diagram of the local enlarged structure at point A in the figure.

[0020] Figure 4 This is a front view structural diagram of the utility model.

[0021] The accompanying drawings are marked as follows: 1. Transformer body; 2. High-voltage terminal; 3. Low-voltage terminal; 4. Support plate; 5. Oil pillow; 6. Corrugated flexible tube; 7. Double-layer protection assembly; 701. Inner connecting tube; 702. Outer connecting tube; 703. Connecting flange; 704. Braided layer; 8. Heat dissipation pipe; 9. Base mounting bracket. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1

[0024] As attached Figures 1 to 4 The figure shows a well-sealed, fuel-saving oil-immersed transformer, comprising a transformer body 1, an oil pillow 5, a corrugated flexible tube 6, and a double-layer protective assembly 7. A support plate 4 is provided on the right side of the upper end of the transformer body 1. Two sets of support plates 4 are provided. The oil pillow 5 is mounted on opposite sides of the support plates 4. The corrugated flexible tube 6 is provided on the upper end of the transformer body 1 and on one side of the oil pillow 5. The double-layer protective assembly 7 is provided above one set of corrugated flexible tubes 6.

[0025] The double-layer protection assembly 7 comprises an inner connecting pipe 701 installed between the two groups of corrugated flexible pipes 6, an outer connecting pipe 702 sleeved on the outer surface of the inner connecting pipe 701, a connecting flange 703 arranged at the two ends of the outer connecting pipe 702, and a braided layer 704 sleeved on the outer surface of the outer connecting pipe 702.

[0026] When the transformer is in use, the support plate 4 of the transformer body 1 provides the installation support function of the oil pillow 5, one group of corrugated flexible pipes 6 is connected to the oil pillow 5, and the other group of corrugated flexible pipes 6 is connected to the transformer body 1. Due to the corrugated structure of the corrugated flexible pipes 6, the connection part with the oil pillow 5 can effectively absorb the vibration from the transformer operation or the external environment, thereby greatly reducing the stress concentration phenomenon that may occur at the pipe connection part and reducing the risk of rupture or leakage at the connection part. When the transformer is in normal operation, the inner connecting pipe 701 transports the oil of the oil pillow 5, the outer connecting pipe 702 effectively prevents environmental pollution caused by internal leakage, and the braided layer 704 enhances the compression resistance and tensile strength of the inner connecting pipe 701 and the outer connecting pipe 702. The corrugated structure of the inner connecting pipe 701 and the outer connecting pipe 702 allows a certain bending.

[0027] Example 2

[0028] Based on the embodiment 1, the scheme in the embodiment 1 is further refined in combination with the specific working mode as follows: Figures 1 to 4 as shown in the following description:

[0029] As a preferred embodiment, the rear of the upper end of the transformer body 1 is provided with a high-voltage terminal 2, and the front of the high-voltage terminal 2 is provided with a low-voltage terminal 3. Further, the high-voltage terminal 2 and the low-voltage terminal 3 are used for safe transmission of high and low voltage electric energy.

[0030] As a preferred embodiment, the outer surface of the transformer body 1 is provided with a plurality of heat dissipation pipes 8, and the lower end of the transformer body 1 is provided with a base mounting frame 9. Further, as the temperature rises, the oil in the transformer will convection, the hot oil rises to the top of the transformer, and the cooler oil sinks to the bottom to form a convection cycle through the heat dissipation pipes 8, dissipating the heat from the inside of the transformer to the external environment, making the flow of oil more efficient, improving the heat dissipation efficiency, reducing the rise of oil temperature, thereby reducing the consumption of oil, achieving the effect of saving oil, and the base mounting frame 9 provides stable support for the transformer body 1.

[0031] As a preferred embodiment, the two sets of connecting flanges 703 are connected with the two sets of corrugated flexible pipes 6 respectively by bolts, the outer surfaces of the pipe bodies of the corrugated flexible pipes 6, the inner connecting pipe 701 and the outer connecting pipe 702 are all in corrugated structures that can be adaptively bent; further, the two sets of connecting flanges 703 connect the double-layer protection assembly 7 between the two sets of corrugated flexible pipes 6, and the corrugated structures have good adaptability, so that each pipe body can be adaptively bent in the case of body fluctuation of the transformer body 1, reducing the risk of stress concentration and damage at the connection.

[0032] As a preferred embodiment, the braided layer 704 is braided around the outer surface of the outer connecting pipe 702 by stainless steel wires, and the two ends of the oil pillow 5 abut against the two sets of support plates 4 respectively; further, the stresses borne by the inner connecting pipe 701 and the outer connecting pipe 702 can be transmitted by the outer layer and uniformly dispersed by the braided layer 704, reducing local stress concentration, and the oil pillow 5 is installed at the support plate 4 for fixation.

[0033] As a preferred embodiment, the high-voltage wiring terminal 2 and the low-voltage wiring terminal 3 are each provided with three sets, and the three sets of high-voltage wiring terminals 2 and the three sets of low-voltage wiring terminals 3 are arranged in an equidistant spacing manner; further, the high-voltage wiring terminal 2 is used for connecting to a power grid or a high-voltage power supply system, which has a high voltage and usually needs to take insulation materials and appropriate protection measures to ensure safe and reliable wiring, and the low-voltage wiring terminal 3 is mainly used for providing a low-voltage power supply for users, for connecting a low-voltage power distribution system or directly supplying power to terminal equipment.

[0034] The working process of the utility model is as follows: first, the high-voltage wiring terminal 2 is used for connecting to a power grid or a high-voltage power supply system, and the low-voltage wiring terminal 3 is mainly used for providing a low-voltage power supply for users, the base mounting frame 9 provides support for the transformer body 1 and connects the base of external equipment, when the transformer starts to be used, with the increase of the temperature of the transformer body 1, the oil liquid in the transformer body 1 will convection, the hot oil rises to the top of the transformer body 1, and the cooler oil sinks to the bottom to form a convection circulation through the heat dissipation pipe 8, the heat from the inside of the transformer is dissipated to the external environment, the flow of the oil liquid is more efficient, the heat dissipation efficiency is improved, the oil temperature is reduced, thereby reducing the consumption of oil, which can effectively save the oil amount;

[0035] And the support plate 4 of the transformer body 1 provides the installation support function of the oil pillow 5, wherein one group of corrugated flexible pipes 6 can be connected to the oil pillow 5, one end of the other group of corrugated flexible pipes 6 is connected to the transformer body 1, and the two groups of connecting flanges 703 install the outer connecting pipe 702 of the double-layer protection assembly 7 between the two groups of corrugated flexible pipes 6 to communicate and ensure normal oil delivery, so as to deliver oil through the inner connecting pipe 701, and the outer connecting pipe 702 protects the inner connecting pipe 701, providing a double-layer pipe structure, when the inner connecting pipe 701 leaks, the outer connecting pipe 702 avoids oil pollution caused by internal leakage, and the woven layer 704 wrapped around the outer connecting pipe 702 improves the compression and tensile resistance of the outer connecting pipe 702, and then the above is the working principle of the oil-saving oil-immersed transformer with good sealing.

Claims

1. A well-sealed, fuel-saving oil-immersed transformer comprising a transformer body (1), an oil pillow (5), a corrugated flexible tube (6) and a double-layer protective assembly (7), characterized in that: A support plate (4) is provided on the right side of the upper end of the transformer body (1), and two groups of support plates (4) are provided. The oil pillow (5) is installed on the opposite side of the support plate (4). The corrugated flexible tube (6) is respectively provided on the upper end of the transformer body (1) and one side of the oil pillow (5). The double-layer protection component (7) is provided above one group of the corrugated flexible tube (6). The double-layer protection assembly (7) includes an inner connecting tube (701), which is installed between two groups of the corrugated flexible tubes (6). The outer surface of the inner connecting tube (701) is sleeved with an outer connecting tube (702), and both ends of the outer connecting tube (702) are provided with connecting flanges (703), and the outer surface of the outer connecting tube (702) is sleeved with a braided layer (704).

2. The oil-immersed transformer with good sealing according to claim 1, characterized in that: A high-voltage connection terminal (2) is provided behind the upper end of the transformer body (1), and a low-voltage connection terminal (3) is provided in front of the high-voltage connection terminal (2).

3. The oil-immersed transformer with good sealing performance according to claim 1, characterized in that: The outer surface of the transformer body (1) is provided with heat dissipation pipes (8), and the heat dissipation pipes (8) are provided in a plurality of groups. Base mounting frames (9) are provided on both sides of the lower end of the transformer body (1).

4. The oil-immersed transformer with good sealing performance according to claim 1, characterized in that: The two groups of connecting flanges (703) are respectively connected to the two groups of corrugated flexible tubes (6) by bolts. The outer surfaces of the corrugated flexible tubes (6), the inner connecting tube (701) and the outer connecting tube (702) are all corrugated structures that can be adaptively bent.

5. The oil-immersed transformer with good sealing performance according to claim 1, characterized in that: The braided layer (704) is made of stainless steel wire and braided around the outer surface of the outer connecting tube (702). The two ends of the oil pillow (5) are respectively in contact with the two groups of support plates (4).

6. The oil-immersed transformer with good sealing performance according to claim 2, characterized in that: The high-voltage connecting terminals (2) and the low-voltage connecting terminals (3) are each provided in three groups, and the three groups of the high-voltage connecting terminals (2) and the three groups of the low-voltage connecting terminals (3) are arranged in an equidistant manner.

Images