A transformer with isolation and separation effect

Abstract

The present invention discloses a transformer with isolation and separation effects, which relates to the technical field of transformers, and specifically includes a transformer body, wherein a partition plate is fixedly connected to the bottom end of the inner cavity of the transformer body, and the partition plate divides the inner cavity of the transformer body into a transformer cavity and a cooling cavity, and an insulating oil radiator is provided on the side wall of the transformer cavity, and a pressure detector and a gas discharger are provided on the top of the transformer cavity, and a transformer core is fixed in the middle of the inner cavity of the transformer cavity. The transformer with isolation and separation effects increases the inner cavity of the transformer cavity through the provision of the gas discharger, and can quickly relieve the internal pressure of the transformer cavity, and can separate the discharged gas from the oil mixed therein by using an oil absorption pad, so as to avoid the discharge of the oil and reduce the loss of insulating oil during the pressure relief process, and the gas discharger can exhaust at multiple points, and the exhaust speed can be controlled according to demand, thereby improving its adaptability.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a transformer with isolation and separation effects. Background Art

[0002] In the power system, the transformer is a common electrical equipment, and its main function is to change the voltage level. The working principle of the transformer is mainly based on the principle of electromagnetic induction, and the voltage is transformed by the change of the magnetic field between two or more mutually insulated coils. The transformer is mainly composed of an iron core, windings and insulating materials.

[0003] The transformer will generate a large amount of heat energy during operation. In order to ensure that it can work normally for a long time, a heat dissipation structure is required. Common cooling methods for transformers include oil-immersed self-cooling, oil-immersed air cooling and forced oil circulation. However, when the transformer is partially overheated or discharged, the cooling oil will decompose and produce gas. As the oil temperature inside the transformer rises, the internal pressure of the transformer is likely to increase. If the pressure cannot be discharged, it is easy to cause safety hazards. To address this problem, some transformers with pressure relief valves are disclosed in the prior art. The pressure relief valve is used to discharge excess gas in the transformer to relieve the internal pressure of the transformer. However, this type of transformer cannot reduce the generation of gas from the source when in use, and during the pressure relief process, it is impossible to avoid the oil being discharged along with the gas. Based on this, the present application proposes a transformer with isolation and separation effects. Summary of the invention

[0004] The present invention provides a transformer with isolation and separation effects, which solves the problems in the above background technology that the generation of gas in the transformer cannot be reduced from the source; and the oil cannot be avoided from being discharged along with the gas during pressure relief.

[0005] The present invention provides the following technical solutions: a transformer with isolation and separation effects, comprising a transformer body, a partition plate fixedly connected to the bottom end of the inner cavity of the transformer body, the partition plate divides the inner cavity of the transformer body into a transformer cavity and a cooling cavity, an insulating oil radiator is provided on the side wall of the transformer cavity, a pressure detector and a gas discharger are provided on the top of the transformer cavity, a transformer core is fixed in the middle of the inner cavity of the transformer cavity, the transformer core comprises a core lamination and an insulating heat conductive sheet, two adjacent core laminations are separated by the insulating heat conductive sheet, and the bottom end of the insulating heat conductive sheet extends into the cooling cavity, and a coil assembly is provided on the transformer core; heat conductive pipes are evenly fixedly connected to the partition plate, the bottom end of the heat conductive pipe extends into the cooling cavity, the other end of the heat conductive pipe extends into the transformer cavity, and a temperature detector is fixedly connected to the side wall of the other end of the heat conductive pipe, the inner cavity of the heat conductive pipe is filled with coolant, and a refrigerator is fixedly connected to one side of the bottom end of the heat conductive pipe; a cooling structure is provided on one side of the cooling cavity;

[0006] An exhaust pipe is evenly arranged on one side of the top of the gas discharger, the top of the inner cavity of the gas discharger is fixedly connected to a limiting net, the exhaust pipe is located above the limiting net, an oil absorption pad is fixed to the bottom of the limiting net, the bottom of the limiting net is connected to an opening and closing plate through an electric telescopic rod, a through hole adapted to the opening and closing plate is arranged in the middle of the bottom of the gas discharger, the pressure changing chamber is communicated with the inner cavity of the gas discharger through the through hole, the top of the opening and closing plate is connected to an oil squeezing net through a supporting rod, the oil squeezing net is located below the oil absorption pad, and the oil squeezing net is movably connected to the electric telescopic rod.

[0007] Preferably, an electric ball valve is provided at one end of the exhaust pipe close to the gas discharger, and a one-way valve is provided at the other end of the exhaust pipe.

[0008] Preferably, the cavity wall of the cooling cavity is a hollow structure, exhaust holes are evenly arranged on the inner side of the cavity wall, and the static wind pressure at each location in the cavity wall is the same, and an exhaust valve is arranged on one side of the cooling cavity.

[0009] Preferably, the cooling structure includes a cooling water tank and a blower, a heat exchange tube is fixedly connected to the inner cavity of the cooling water tank, an air outlet end of the blower is connected to the air inlet end of the heat exchange tube, and the air outlet end of the heat exchange tube extends into the inner cavity of the cavity wall of the cooling cavity.

[0010] Preferably, a protective cover is fixedly connected to the outer surface of the transformer body, and color-changing particles are filled between the protective cover and the transformer body.

[0011] Preferably, the outer surface of the cooling structure, the outer surface of the protective cover and the outer surface of the gas discharger are all coated with a heat insulation coating.

[0012] Preferably, a thermal insulation pad is provided between the temperature detector and the heat conducting pipe, the thermal insulation pad is fixedly connected to the heat conducting pipe, and the temperature detector is fixedly connected to the thermal insulation pad.

[0013] Preferably, when the oil squeezing net squeezes the oil absorbing pad, the bottom of the opening and closing plate is located in the inner cavity of the through hole.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The transformer with isolation and separation effect increases the inner cavity of the transformer cavity by setting the gas discharger. When the gas discharger is in use, the inner cavity of the transformer cavity can be quickly relieved. The discharged gas and the oil mixed therein can be separated by the oil absorption pad to avoid the discharge of the oil and reduce the loss of insulating oil in the pressure relief process. The gas discharger can exhaust at multiple points and control the exhaust speed according to demand to improve its adaptability.

[0016] 2. The transformer with isolation and separation effect can quickly transfer the heat in the transformer cavity to the cooling cavity through the heat pipe, the insulating heat conductive sheet and the cooling structure, thereby improving the cooling effect of the core laminations and the coil assembly. The heat pipe can be used to accurately cool the locally overheated insulating oil, reduce the amount of gas generated by the overheated decomposition of the oil, and thus reduce the probability of excessive pressure inside the transformer, thereby improving the safety of the transformer when in use.

[0017] 3. The transformer with isolation and separation effect is isolated from the external environment by setting the thermal insulation coating, which reduces the impact of the external environment on the internal environment of the transformer, improves the stability of the internal environment of the transformer, and facilitates the use of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front schematic diagram of the structure of the present invention;

[0019] Figure 2 The structure of the present invention Figure 1 Back side diagram;

[0020] Figure 3 The structure of the present invention Figure 2 Internal schematic diagram;

[0021] Figure 4 This is a schematic diagram of the explosion of the iron core of the transformer structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the heat conduction pipe structure of the present invention;

[0023] Figure 6 It is a schematic diagram of the interior of the gas discharger structure of the present invention.

[0024] In the figure: 1. Transformer body; 2. Gas discharger; 3. Exhaust pipe; 4. Electric ball valve; 5. Pressure detector; 6. Cooling water tank; 7. Blower; 8. Partition plate; 9. Heat pipe; 10. Temperature detector; 11. Insulating heat conductive sheet; 12. Iron core lamination; 13. Refrigerator; 14. Coolant; 15. Oil absorption pad; 16. Oil squeezing net; 17. Support rod; 18. Opening and closing plate; 19. Electric telescopic rod; 20. Limiting net; 21. Insulating oil radiator; 22. Exhaust valve. DETAILED DESCRIPTION

[0025] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0026] The present invention provides a transformer with isolation and separation effects, comprising a transformer body 1, a partition plate 8 is fixedly connected to the bottom end of the inner cavity of the transformer body 1, the partition plate 8 divides the inner cavity of the transformer body 1 into a transformer cavity and a cooling cavity, the inner cavity of the transformer cavity is filled with insulating oil, an insulating oil radiator 21 is arranged on the side wall of the transformer cavity, a transformer core is fixed in the middle of the inner cavity in the inner cavity of the transformer cavity, the transformer core comprises a core lamination 12 and an insulating heat conductive sheet 11, two adjacent core laminations 12 are separated by the insulating heat conductive sheet 11, and the bottom end of the insulating heat conductive sheet 11 extends into the cooling cavity, a coil assembly is arranged on the transformer core, and through the arrangement of the insulating heat conductive sheet 11, the insulating heat conductive sheet 11 can transfer the heat generated on the core lamination 12 to the cooling cavity, thereby improving the cooling speed of the core lamination 12, and the material of the insulating heat conductive sheet 11 can be a mica board.

[0027] The partition plate 8 is evenly and fixedly connected with a heat conducting pipe 9, the bottom end of the heat conducting pipe 9 extends into the cooling chamber, and the other end of the heat conducting pipe 9 extends into the transformer chamber. Through the arrangement of the heat conducting pipe 9, the heat conducting pipe 9 can transfer the heat of the insulating oil to the cooling chamber, reduce the temperature of the insulating oil, and facilitate the insulating oil to cool the transformer core and coil assembly.

[0028] The outer surface of the other end of the heat pipe 9 is fixedly connected with a heat insulating pad, and the outer surface of the heat insulating pad is fixedly connected with a temperature detector 10. By setting the temperature detector 10, the temperature of the insulating oil around the heat pipe 9 can be monitored in real time, and the location where the insulating oil temperature is overheated can be found in time. By setting the heat insulating pad, the influence of the heat pipe 9 on the temperature detector 10 can be reduced.

[0029] The inner cavity of the heat pipe 9 is filled with coolant 14, and a refrigerator 13 is fixedly connected to one side of the bottom end of the heat pipe 9. When the refrigerator 13 is a semiconductor refrigerator, the hot end of the refrigerator 13 is located outside the heat pipe 9. Through the arrangement of the refrigerator 13 and the coolant 14, when the temperature of the insulating oil is too high, the refrigerator 13 works to reduce the temperature of the coolant 14, so that the heat pipe 9 can quickly exchange heat with the overheated insulating oil, thereby increasing the cooling rate of the insulating oil.

[0030] From the above description, it can be seen that when the transformer is in use, the heat pipe 9 and the insulating heat conductive sheet 11 can be used to conduct away the heat in the transformer cavity, which is convenient for the operation of the transformer, and can accurately cool down the locally overheated parts, thereby reducing the probability of decomposition of the insulating oil due to local overheating, and reducing the probability of gas generation in the transformer cavity from the source, thereby improving the safety of the transformer when in use.

[0031] The top of the transformer cavity is provided with a pressure detector 5 and a gas discharger 2. Through the setting of the pressure detector 5, the pressure detector 5 can monitor the pressure in the transformer cavity in real time. A through hole is provided at the bottom of the inner cavity of the gas discharger 2. The inner cavity of the gas discharger 2 is connected with the transformer cavity through the through hole. An opening and closing plate 18 is movably connected in the inner cavity of the through hole. When the opening and closing plate 18 is separated from the through hole, the excess gas and insulating oil in the transformer cavity can enter the gas discharger 2. When the opening and closing plate 18 is located in the inner cavity of the through hole, the through hole is blocked. At this time, the inner cavity of the gas discharger 2 and the transformer cavity are in a mutually independent state, which is convenient for the operation of the transformer.

[0032] An exhaust pipe 3 is evenly arranged on one side of the top of the gas discharger 2. The top of the inner cavity of the gas discharger 2 is fixedly connected to a limiting net 20. The exhaust pipe 3 is located above the limiting net 20. An oil absorption pad 15 is fixed to the bottom of the limiting net 20. Through the setting of the oil absorption pad 15, the oil absorption pad 15 can absorb the oil mixed in the gas to prevent the oil from being discharged with the gas, thereby reducing the waste of the oil. An electric ball valve 4 is arranged at one end of the exhaust pipe 3 close to the gas discharger 2, and a one-way valve is arranged at the other end of the exhaust pipe 3. Through the setting of the electric ball valve 4, the exhaust speed of the exhaust pipe 3 can be adjusted according to demand, thereby improving the adaptability of the transformer; the setting of the one-way valve can prevent gas backflow and prevent external impurities from entering the interior of the transformer.

[0033] The bottom of the limiting net 20 is fixedly connected with an electric telescopic rod 19, and the output shaft end of the electric telescopic rod 19 is fixedly connected to the opening and closing plate 18. The extension and retraction of the electric telescopic rod 19 can change the position of the opening and closing plate 18 fixedly connected thereto. The top of the opening and closing plate 18 is fixedly connected with a support rod 17, and the top of the support rod 17 is fixedly connected with an oil squeezing net 16. The oil squeezing net 16 is located below the oil absorption pad 15. The oil squeezing net 16 is movably connected to the electric telescopic rod 19, and when the oil squeezing net 16 squeezes the oil absorption pad 15, the bottom of the opening and closing plate 18 is located in the inner cavity of the through hole. In this way, the contraction of the electric telescopic rod 19 can reset the opening and closing plate 18 and squeeze the oil squeezing net 16 on the oil absorption pad 15, saving resources, and under the action of the squeezing force, the insulating oil adsorbed in the oil absorption pad 15 can be squeezed out, which is convenient for the reuse of the oil absorption pad 15 and the reuse of the insulating oil.

[0034] From the above description of the gas discharger 2, it can be seen that when the gas discharger 2 is in use, the inner cavity of the transformer chamber is increased, which can quickly relieve the internal pressure of the transformer chamber, and the oil absorption pad 15 can be used to separate the discharged gas and the oil mixed therein, so as to avoid the discharge of oil and reduce the loss of insulating oil during the pressure relief process. In addition, the gas discharger 2 can exhaust at multiple points and control the exhaust speed according to demand to improve its adaptability.

[0035] The wall of the cooling chamber is a hollow structure, and exhaust holes are evenly arranged on the inner side of the inner cavity of the wall, and the static wind pressure at each location in the inner cavity of the wall is the same. An exhaust valve 22 is arranged on one side of the cooling chamber, and a cooling structure is arranged on one side of the cooling chamber. The cooling structure includes a cooling water tank 6 and a blower 7. A heat exchange tube is fixedly connected to the inner cavity of the cooling water tank 6, and the air outlet end of the blower 7 is connected to the air inlet end of the heat exchange tube, and the air outlet end of the heat exchange tube extends to the inner cavity of the wall of the cooling chamber. Through the setting of the cooling structure, the operation of the blower 7 can blow the outside air into the inner cavity of the heat exchange tube, and the heat exchange tube exchanges heat with the water around it. The air after heat exchange can be evenly discharged into the cooling chamber through the exhaust holes, and the air exchanges heat with the heat conducting tube 9 and the insulating heat conducting sheet 11. The heated air is discharged through the exhaust valve, and the exhaust valve is a one-way exhaust valve to prevent external impurities from entering the cooling chamber. The cooling water tank 6 has a built-in refrigeration compression pump, which is used to cool the water in the cooling water tank 6 and can change the temperature of the water in the cooling water tank 6 according to demand.

[0036] A protective cover is fixedly connected to the outer surface of the transformer body 1, and color-changing particles are filled between the protective cover and the transformer body 1. The color-changing particles are made of a transparent material that changes color when exposed to oil. Through the setting of the color-changing particles, the staff can judge whether cracks appear in the transformer body 1 according to the color of the color-changing particles, which is convenient for timely repairing the transformer body 1. The protective cover can protect the transformer body 1 and extend the service life of the transformer body 1.

[0037] The outer surface of the cooling structure, the outer surface of the protective cover and the outer surface of the gas discharger 2 are all coated with a thermal insulation coating. Through the provision of the thermal insulation coating, the transformer is isolated from the external environment, reducing the impact of the external environment on the internal environment of the transformer.

[0038] The above-mentioned transformer body 1 is also provided with conventional structures such as a transformer bushing, a transformer oil tank, and a respirator which are provided on a transformer in the prior art and will not be described in detail here.

[0039] The electrical components involved in this application are all prior art, and technicians in this field are familiar with their connection methods. Through these technicians, all the electrical components in this application are connected to their compatible power supplies through wires, and according to the actual situation, a suitable controller is selected to meet the control requirements. The specific connection and control sequence are described below. The electrical connection is completed in a sequential working order, and the detailed connection means are well known in the art. The following mainly introduces the working principle and process, and no further explanation of the electrical control is given.

[0040] To sum up: when the transformer with isolation and separation effect is in use, the cooling structure is used to cool the heat pipe 9 and the insulating heat conductive sheet 11, so that the heat pipe 9 and the insulating heat conductive sheet 11 can transfer the heat in the transformer cavity to the cooling cavity, thereby improving the cooling effect of the core laminations and the coil assembly, and the temperature detector 10 can monitor the oil temperature around it in real time. If the temperature detector 10 detects that the oil temperature around it is abnormally high, the refrigerator 13 adapted to the temperature detector 10 will work, and the refrigerator 13 will cool the coolant 14 in the heat pipe 9. At this time, the heat pipe 9 and the surrounding oil can quickly exchange heat, and the oil can be locally cooled quickly, which can reduce the amount of gas generated by overheating and decomposition of the oil, thereby reducing the probability of excessive pressure inside the transformer, thereby improving the safety of the transformer when in use.

[0041] The pressure detector 5 monitors the pressure in the transformer chamber in real time. If the pressure value in the transformer chamber exceeds a preset value, the electric telescopic rod 19 extends, and the electric telescopic rod 19 drives the opening and closing plate 18 fixedly connected thereto to move downward until the opening and closing plate 18 is separated from the through hole. At this time, the inner cavity of the gas discharger 2 is in a connected state with the transformer chamber, and the excess gas and oil in the transformer chamber enter the gas discharger 2, which quickly relieves the pressure in the transformer chamber, and the oil absorption pad 15 can absorb the oil in the clamping claws in the gas, separate the oil from the gas, reduce the waste of insulating oil, and realize the recovery of insulating oil. When the internal pressure of the transformer is normal, the electric telescopic rod 19 contracts, and the electric telescopic rod 19 drives the opening and closing plate 18 and the oil squeezing net 16 to move in the opposite direction. When the opening and closing plate 18 is reset, the oil squeezing net 16 squeezes the oil absorption pad 15 to squeeze out the oil absorbed in the oil absorption pad 15, which is convenient for the reuse of insulating oil.

[0042] Furthermore, the provision of the heat-insulating coating isolates the transformer from the external environment, reduces the influence of the external environment on the internal environment of the transformer, improves the stability of the internal environment of the transformer, and facilitates the use of the transformer.

[0043] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A transformer with isolation and separation effect, comprising a transformer body (1), characterized in that: A partition plate (8) is fixedly connected to the bottom end of the inner cavity of the transformer body (1), and the partition plate (8) divides the inner cavity of the transformer body (1) into a transformer cavity and a cooling cavity. An insulating oil radiator (21) is provided on the side wall of the transformer cavity. A pressure detector (5) and a gas exhauster (2) are provided on the top of the transformer cavity. A transformer core is fixed in the middle of the inner cavity of the transformer cavity. The transformer core includes a core lamination (12) and an insulating heat conductive sheet (11). Two adjacent core laminations (12) are separated by the insulating heat conductive sheet (11), and the insulating heat conductive sheet (11) is provided with a pressure detector (5) and a gas exhauster (2). The bottom end of the sheet (11) extends into the cooling chamber, and a coil assembly is arranged on the transformer core; a heat conducting pipe (9) is evenly and fixedly connected to the partition plate (8), the bottom end of the heat conducting pipe (9) extends into the cooling chamber, the other end of the heat conducting pipe (9) extends into the transformer chamber, and a temperature detector (10) is fixedly connected to the side wall of the other end of the heat conducting pipe (9), the inner cavity of the heat conducting pipe (9) is filled with cooling liquid (14), and a refrigerator (13) is fixedly connected to one side of the bottom end of the heat conducting pipe (9); a cooling structure is arranged on one side of the cooling chamber; An exhaust pipe (3) is evenly arranged on one side of the top of the gas discharger (2); the top of the inner cavity of the gas discharger (2) is fixedly connected to a limiting net (20); the exhaust pipe (3) is located above the limiting net (20); an oil absorption pad (15) is fixed to the bottom of the limiting net (20); the bottom of the limiting net (20) is connected to an opening and closing plate (18) via an electric telescopic rod (19); a through hole matching the opening and closing plate (18) is arranged in the middle of the bottom of the gas discharger (2); the pressure-changing chamber is connected to the inner cavity of the gas discharger (2) via the through hole; the top of the opening and closing plate (18) is connected to an oil squeezing net (16) via a supporting rod (17); the oil squeezing net (16) is located below the oil absorption pad (15); and the oil squeezing net (16) is movably connected to the electric telescopic rod (19).

2. A transformer with isolation and separation effect according to claim 1, characterized in that: An electric ball valve (4) is provided at one end of the exhaust pipe (3) close to the gas discharger (2), and a one-way valve is provided at the other end of the exhaust pipe (3).

3. The transformer with isolation and separation effect according to claim 1, characterized in that: The cavity wall of the cooling cavity is a hollow structure, exhaust holes are evenly arranged on the inner side of the cavity wall, and the static wind pressure at each location in the cavity wall is the same. An exhaust valve (22) is arranged on one side of the cooling cavity.

4. A transformer with isolation and separation effect according to claim 3, characterized in that: The cooling structure comprises a cooling water tank (6) and a blower (7); a heat exchange tube is fixedly connected to the inner cavity of the cooling water tank (6); an air outlet end of the blower (7) is connected to an air inlet end of the heat exchange tube; and the air outlet end of the heat exchange tube extends into the inner cavity of the cavity wall of the cooling cavity.

5. The transformer with isolation and separation effect according to claim 1, characterized in that: A protective cover is fixedly connected to the outer surface of the transformer body (1), and color-changing particles are filled between the protective cover and the transformer body (1).

6. The transformer with isolation and separation effect according to claim 5, characterized in that: The outer surface of the cooling structure, the outer surface of the protective cover and the outer surface of the gas discharger (2) are all coated with a heat insulation coating.

7. The transformer with isolation and separation effect according to claim 5, characterized in that: A heat insulating pad is provided between the temperature detector (10) and the heat conducting pipe (9), the heat insulating pad is fixedly connected to the heat conducting pipe (9), and the temperature detector (10) is fixedly connected to the heat insulating pad.

8. The transformer with isolation and separation effect according to claim 5, characterized in that: When the oil squeezing net (16) squeezes the oil absorbing pad (15), the bottom of the opening and closing plate (18) is located in the inner cavity of the through hole.

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