Self-circulation oil immersed transformer

Abstract

The utility model provides a self-circulation oil immersed transformer which comprises an oil tank body, a ventilation pipeline, a condensation sleeve, heat dissipation fins, heat dissipation holes, an axial flow fan and installation screws, a transformer body is installed on the lower end face of the interior of the oil tank body, and a high-low voltage sleeve is arranged on the upper end face of the oil tank body and electrically connected with the transformer body. A cooling water tank is fixed to the right end face of the oil tank body, a refrigerator is fixed to the right end face of the cooling water tank, the annular face of the oil conveying pipeline is sleeved with a condensation sleeve, a ventilation pipeline is fixed to the upper end face of the cooling water tank, and the annular face of the oil conveying pipeline is sleeved with cooling fins. The protective net covers are fixed to the upper end face, the left end face and the right end face of the ventilation pipeline through installation screws, heat dissipation holes are formed in the inner wall of the ventilation pipeline, the axial fans are installed in the protective net covers, water cooling and air cooling are used in cooperation for heat dissipation of oil, the cooling efficiency is high, and practicability is good.

Description

Technical Field

[0001] The utility model relates to a self-circulating oil-immersed transformer, belonging to the technical field of transformers. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, the secondary coil and the iron core. The main functions of the transformer are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization, etc. The oil-immersed transformer is one of the important equipment in the power supply and distribution system of industrial and mining enterprises and civil buildings. It reduces the network voltage to the bus voltage used by users and can be used indoors or outdoors.

[0003] Chinese Patent No.: CN213988525U, an oil-immersed self-circulating heat dissipation transformer, the technical solution is provided with a heat dissipation device and a refrigeration device, the oil that absorbs the heat of the transformer is pumped into the oil extraction pipe through an oil pump, and the oil is preliminarily heat-dissipated through the heat sink, and then the oil is input into the refrigeration box through the refrigeration pipe for refrigeration, and finally the cooled oil is returned to the oil tank, realizing the function of self-circulating heat dissipation, thereby enhancing the heat dissipation effect, improving the heat dissipation efficiency, and extending the service life of the transformer. However, the technical solution uses water cooling and natural cooling for the heat dissipation of the oil, and the cooling efficiency is still low, and the practicality is poor. Now there is an urgent need for a self-circulating oil-immersed transformer to solve the above-mentioned problems. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a self-circulating oil-immersed transformer to solve the problems raised in the above-mentioned background technology. The utility model has a reasonable structure. The design uses water cooling and air cooling in combination for the heat dissipation of the oil, with high cooling efficiency and good practicality.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized by the following technical scheme: a self-circulating oil-immersed transformer, comprising an oil tank body, a ventilation duct, a condensing sleeve, a heat dissipation fin, a heat dissipation hole, an axial flow fan and mounting screws, a transformer body is installed on the lower end surface of the oil tank body, a high-low voltage sleeve is arranged on the upper end surface of the oil tank body and is electrically connected to the transformer body, and an oil pipeline is arranged on the outer side of the oil tank body;

[0006] A cooling water tank is fixed to the right end face of the oil tank body, a refrigerator is fixed to the right end face of the cooling water tank, a condensing sleeve is sleeved on the outer side of the oil pipeline annular surface, a ventilation duct is fixed to the upper end face of the cooling water tank, a cooling fin is sleeved on the outer side of the oil pipeline annular surface, a protective mesh cover is fixed to the upper end face and the left and right end faces of the ventilation duct by installing screws, cooling holes are opened on the inner wall of the ventilation duct, and an axial fan is installed inside the protective mesh cover.

[0007] Furthermore, a sealing gasket is provided between the oil delivery pipeline and the oil tank body, and a sealing gasket is provided between the oil delivery pipeline and the cooling water tank.

[0008] Furthermore, the condensing sleeve is configured as a surrounding serpentine structure, and a sealing gasket is provided between the condensing sleeve and the oil pipeline.

[0009] Furthermore, a fixing hole is provided inside the heat dissipation fin, the inner diameter of the fixing hole is equal to the outer diameter of the oil pipeline, and the two can be fixedly connected.

[0010] Furthermore, the heat dissipation holes are provided in a plurality of groups, and the heat dissipation holes in the plurality of groups are equal in size and are provided on the inner wall of the ventilation duct at equal intervals.

[0011] Furthermore, four groups of mounting screws are provided, the four groups of mounting screws are equal in size, and are symmetrically fixed between the protective mesh cover and the ventilation duct. The axial flow fan and the protective mesh cover constitute an air cooling component, and the air cooling component is provided in multiple groups. The composition structure of the multiple groups of air cooling components is the same, and they are equidistantly arranged on the outside of the ventilation duct.

[0012] The beneficial effects of the utility model are as follows: the utility model is a self-circulating oil-immersed transformer. Since the utility model adds ventilation ducts, condensing sleeves, heat dissipation fins, heat dissipation holes, axial flow fans and mounting screws, the design uses water cooling and air cooling in combination for the heat dissipation of the oil, has high cooling efficiency and good practicality, and solves the problem that the original oil-immersed self-circulating heat dissipation transformer uses water cooling and natural cooling for the heat dissipation of the oil, but the cooling efficiency is still low and the practicality is poor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 This is a structural diagram of a self-circulating oil-immersed transformer of the utility model;

[0015] Figure 2 This is a structural cross-sectional view of a self-circulating oil-immersed transformer of the utility model;

[0016] Figure 3 This is a partial structural diagram of a self-circulating oil-immersed transformer of the utility model;

[0017] In the figure: 1- oil tank body, 2- cooling water tank, 3- refrigerator, 4- protective mesh cover, 5- ventilation duct, 6- high and low pressure bushings, 7- oil pipeline, 8- transformer body, 9- condensation bushing, 10- cooling fins, 11- cooling holes, 12- axial flow fan, 13- mounting screws. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] See also Figure 1-Figure 3 The utility model provides a technical solution: a self-circulating oil-immersed transformer, comprising an oil tank body 1, a ventilation duct 5, a condensing sleeve 9, a heat dissipation fin 10, a heat dissipation hole 11, an axial flow fan 12 and a mounting screw 13, a transformer body 8 is installed on the lower end surface of the oil tank body 1, a high and low voltage sleeve 6 is arranged on the upper end surface of the oil tank body 1 and is electrically connected to the transformer body 8, and an oil pipeline 7 is arranged on the outer side of the oil tank body 1;

[0020] A cooling water tank 2 is fixed to the right end face of the oil tank body 1, a refrigerator 3 is fixed to the right end face of the cooling water tank 2, a condensing sleeve 9 is sleeved on the outer side of the annular surface of the oil pipeline 7, a ventilation duct 5 is fixed to the upper end face of the cooling water tank 2, a cooling fin 10 is sleeved on the outer side of the annular surface of the oil pipeline 7, a protective mesh cover 4 is fixed to the upper end face and the left and right end faces of the ventilation duct 5 by mounting screws 13, a cooling hole 11 is opened on the inner wall of the ventilation duct 5, an axial flow fan 12 is installed inside the protective mesh cover 4, this design uses water cooling and air cooling in combination for the heat dissipation of the oil, and has high cooling efficiency and good practicality.

[0021] As the first embodiment of the utility model: a sealing gasket is arranged between the oil pipeline 7 and the oil tank body 1, and this design can prevent oil from leaking out of the oil tank body 1, thereby improving the utilization rate of the heat dissipating oil; a sealing gasket is arranged between the oil pipeline 7 and the cooling water tank 2, and this design prevents water in the cooling water tank 2 from leaking out, thereby affecting the efficiency of water cooling; the condensing sleeve 9 is arranged as a surrounding serpentine structure, and a sealing gasket is arranged between the condensing sleeve 9 and the oil pipeline 7, and this design conducts the heat of the oil pipeline 7 through the condensing sleeve 9, thereby preventing the oil pipeline 7 from directly contacting the water inside the cooling water tank and causing corrosion;

[0022] A fixing hole is provided inside the heat dissipation fin 10, and the inner diameter of the fixing hole is equal to the outer diameter of the oil pipeline 7, and the two can be fixedly connected. This design can fix the heat dissipation fin 10 on the outside of the oil pipeline 7 through the fixing hole, and transmit the heat of the oil pipeline 7 through the heat dissipation fin 10. There are multiple groups of heat dissipation holes 11, and the multiple groups of heat dissipation holes 11 are equal in size and are equidistantly provided on the inner wall of the ventilation duct 5. There are four groups of mounting screws 13, and the four groups of mounting screws 13 are equal in size and are symmetrically fixed between the protective mesh cover 4 and the ventilation duct 5. The axial flow fan 12 and the protective mesh cover 4 constitute an air cooling component. There are multiple groups of air cooling components, and the composition structure of the multiple groups of air cooling components is the same, and they are equidistantly provided on the outside of the ventilation duct 5. This design dissipates heat to the heat dissipation fins 10 through multiple groups of air cooling components, so that the oil pipeline 7 is cooled by air cooling to reduce the temperature, and the heat dissipation effect of the heat dissipation oil is improved in combination with water cooling.

[0023] As the second embodiment of the utility model: the staff first connects the axial flow fan 12 and the refrigerator 3 to the external power supply and the external controller through wires. The refrigerator 3 can reduce the temperature inside the cooling water tank 2, and conduct the heat of the oil pipeline 7 through the condensing sleeve 9 to prevent the oil pipeline 7 from directly contacting the water inside the cold water tank and causing corrosion. The heat is dissipated by multiple groups of axial flow fans 12 to the heat dissipating fins 10. Due to the design of the heat dissipating fins 10, the contact area between the oil pipeline 7 and the outside world is increased, thereby making the air cooling more efficient, so that the oil pipeline 7 is cooled by air cooling to reduce the temperature, and the heat dissipation effect of the heat dissipating oil is improved in combination with water cooling.

[0024] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0025] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as screws, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0026] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A self-circulating oil-immersed transformer, comprising an oil tank body, a ventilation duct, a condensation sleeve, a heat dissipation fin, a heat dissipation hole, an axial flow fan and mounting screws, characterized in that: The transformer body is installed on the lower end surface of the oil tank body, the high and low voltage bushings are arranged on the upper end surface of the oil tank body and are electrically connected to the transformer body, and an oil pipeline is arranged on the outer side of the oil tank body; A cooling water tank is fixed to the right end face of the oil tank body, a refrigerator is fixed to the right end face of the cooling water tank, a condensing sleeve is sleeved on the outer side of the oil pipeline annular surface, a ventilation duct is fixed to the upper end face of the cooling water tank, a cooling fin is sleeved on the outer side of the oil pipeline annular surface, a protective mesh cover is fixed to the upper end face and the left and right end faces of the ventilation duct by installing screws, cooling holes are opened on the inner wall of the ventilation duct, and an axial fan is installed inside the protective mesh cover.

2. A self-circulating oil-immersed transformer according to claim 1, characterized in that: A sealing gasket is provided between the oil delivery pipeline and the oil tank body, and a sealing gasket is provided between the oil delivery pipeline and the cooling water tank.

3. The self-circulating oil-immersed transformer according to claim 1, characterized in that: The condensing sleeve is configured as a surrounding serpentine structure, and a sealing gasket is provided between the condensing sleeve and the oil pipeline.

4. The self-circulating oil-immersed transformer according to claim 1, characterized in that: A fixing hole is provided inside the heat dissipation fin, the inner diameter of the fixing hole is equal to the outer diameter of the oil pipeline, and the two can be fixedly connected.

5. The self-circulating oil-immersed transformer according to claim 1, characterized in that: The heat dissipation holes are provided in a plurality of groups, and the heat dissipation holes in the plurality of groups are equal in size and are provided in equal intervals on the inner wall of the ventilation duct.

6. The self-circulating oil-immersed transformer according to claim 1, characterized in that: The mounting screws are provided in four groups, which are equal in size and symmetrically fixed between the protective mesh cover and the ventilation duct. The axial flow fan and the protective mesh cover constitute an air cooling component. The air cooling component is provided in multiple groups, and the composition structure of the multiple groups of air cooling components is the same, and they are equidistantly arranged on the outside of the ventilation duct.

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