Transformer with insulating oil convenient to replace

Abstract

The utility model discloses a transformer convenient to replace insulating oil, which relates to the technical field of transformers, and comprises a transformer shell consisting of an oil tank main body and a top cover, the top cover is fixed at the top of the oil tank main body through bolts and is used for plugging the top of the oil tank main body, and the top of the top cover and one side of the oil tank main body are provided with an oil replacement assembly. The oil changing assembly is used for achieving insulating oil changing operation in the oil tank body, and a backwashing assembly is arranged in the oil tank body and used for conducting impact cleaning operation on the inner surface of the oil tank body. According to the oil tank, the back washing assembly is arranged, insulation cleaning liquid and hot air are sequentially conveyed into the oil tank body through the back washing assembly, oil sludge and residues in the oil tank body can be cleaned, and the whole operation is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically a transformer that facilitates the replacement of insulating oil. Background Technology

[0002] Transformer oil, also known as transformer insulating oil or transformer insulating fluid, is a special oil used for insulation and cooling of transformers. It is mainly composed of mineral oil or synthetic oil and usually contains additives to improve its insulation performance and thermal stability. The main function of transformer oil is to provide electrical insulation inside the transformer, prevent arcing and electric shock, and cool the various components of the transformer. It can effectively resist the effects of high temperature, high pressure and arcing, and maintain the normal operation of the transformer. In addition to its insulation and cooling functions, transformer oil also has the function of preventing oxidation and corrosion to extend the service life of the transformer. It can also help detect internal faults in the transformer and determine the health status of the transformer by analyzing the chemical composition and physical properties of the oil.

[0003] Transformer oil requires regular inspection and maintenance, including monitoring its insulation performance, moisture content, acid value, and dissolved gas content, to ensure the normal operation and safety of the transformer.

[0004] There are generally two ways to change transformer oil: one is to change the oil on-site, and the other is to change the oil after thoroughly cleaning the inside of the transformer.

[0005] On-site oil changes take less time, usually only 4 to 5 days, which can reduce the impact of long downtime on the balance of on-site production and logistics. However, on-site oil changes must be carried out in good weather and low humidity conditions. Also, the sludge and residue on the internal insulation surface of the transformer are not easy to remove, so regular follow-up tests are required after the oil change.

[0006] Another way to change the oil is to thoroughly clean the inside of the transformer before changing the oil. Thorough cleaning can completely remove sludge and residues and ensure that the new oil does not undergo adverse oxidation reactions or aging. However, this method takes a long time, about 20 days, and the maintenance cost is high.

[0007] Based on the above, in order to remove sludge and residue from the internal insulation surface of the transformer during on-site oil changes, a transformer that facilitates the replacement of insulating oil is provided. Utility Model Content

[0008] The purpose of this invention is to provide a transformer that facilitates the replacement of insulating oil in order to solve the problems mentioned above.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a transformer that facilitates the replacement of insulating oil, comprising a transformer shell consisting of an oil tank body and a top cover. The top cover is fixed to the top of the oil tank body by bolts to seal the top of the oil tank body. An oil replacement assembly is provided on the top of the top cover and one side of the oil tank body. The oil replacement assembly is used to replace the insulating oil inside the oil tank body. A backflushing assembly is provided inside the oil tank body to perform impact cleaning on the inner surface of the oil tank body.

[0010] The backwashing assembly includes a return port, a 7-shaped connecting pipe, a U-shaped nozzle, and a spray hole;

[0011] The return port is fixed on one side of the outer wall of the fuel tank body near the top and is connected to the inner cavity of the fuel tank body. The 7-shaped connecting pipe is distributed on the inner side of the fuel tank body and is connected to the return port. The return-shaped nozzle is fixed on the outside of the 7-shaped connecting pipe and is connected to the 7-shaped connecting pipe. The nozzle is opened on the outside of the return-shaped nozzle.

[0012] The insulating cleaning fluid is delivered to the inside of the return nozzle through the return port and the figure-7 connecting pipe, and then sprayed out through the nozzle hole to achieve the flushing and cleaning operation of the inner wall of the oil tank.

[0013] As a further improvement of this utility model: multiple spiral nozzles are evenly arranged vertically and distributed evenly, and the vertical parts of the multiple spiral nozzles are connected and conductive to the figure-7 connecting pipe.

[0014] As a further improvement of this utility model: spray holes are provided on both the outer and inner sides of the spiral nozzle, and multiple spray holes are evenly arranged along the rectangular trajectory of the spiral nozzle.

[0015] As a further embodiment of this utility model: the oil changing assembly includes an L-shaped bracket, an oil reservoir, an oil filling port, a connecting pipe, and an oil drain port;

[0016] The oil storage tank is fixed to one side of the top of the oil tank body by an L-shaped bracket. The connecting pipe is fixed to the top of the oil storage tank and is connected to the oil storage tank. The filling port is fixed between the bottom of the oil storage tank and the top of the top cover, and the two ends of the filling port are connected to the inner cavity of the L-shaped bracket and the inner cavity of the oil tank body, respectively.

[0017] The oil drain port is fixed on one side of the oil tank body near the bottom and is connected to the inner cavity of the oil tank body.

[0018] As a further embodiment of this utility model: the inner wall diameter of the return port and the 7-shaped connecting pipe is larger than the inner wall diameter of the return nozzle, the outer wall dimension of the trajectory of the return nozzle is smaller than the inner wall dimension of the fuel tank body, and the inner side dimension of the trajectory of the return nozzle is larger than the outer side dimension of the internal winding of the fuel tank body.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] By setting up a backwashing component, insulating cleaning fluid and hot air are sequentially delivered to the inside of the oil tank, which can realize the cleaning of sludge and residue inside the oil tank. The overall operation is simple and convenient. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a structural distribution diagram of the backwashing assembly of this utility model located inside the main body of the oil tank;

[0023] Figure 3 This is a schematic diagram of the backwashing assembly of this utility model.

[0024] In the diagram: 1. Transformer casing; 101. Oil tank body; 102. Top cover; 2. Oil changing assembly; 201. L-shaped bracket; 202. Oil conservator; 203. Filling port; 204. Connecting pipe; 205. Drain port; 3. Backflushing assembly; 301. Return port; 302. 7-shaped connecting pipe; 303. U-shaped nozzle; 304. Spray hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-3 In this embodiment of the present invention, a transformer that facilitates the replacement of insulating oil includes a transformer housing 1 consisting of an oil tank body 101 and a top cover 102. The top cover 102 is fixed to the top of the oil tank body 101 by bolts to seal the top of the oil tank body 101. An oil replacement assembly 2 is provided on the top of the top cover 102 and one side of the oil tank body 101. The oil replacement assembly 2 is used to replace the insulating oil inside the oil tank body 101. A backflushing assembly 3 is provided inside the oil tank body 101 to perform impact cleaning on the inner surface of the oil tank body 101.

[0027] Backwash assembly 3 includes a return port 301, a 7-shaped connecting pipe 302, a return-shaped nozzle 303, and a spray hole 304;

[0028] The return port 301 is fixed to the outer wall of the oil tank body 101 near the top and communicates with the inner cavity of the oil tank body 101. The 7-shaped connecting pipe 302 is distributed on the inner side of the oil tank body 101 and communicates with the return port 301. The return nozzle 303 is fixed to the outer side of the 7-shaped connecting pipe 302 and communicates with the 7-shaped connecting pipe 302. The nozzle 304 is opened on the outer side of the return nozzle 303.

[0029] The insulating cleaning fluid is transported through the return port 301 and the 7-shaped connecting pipe 302 to the inside of the return nozzle 303 and sprayed out through the nozzle 304 to achieve the flushing and cleaning operation of the inner wall of the oil tank body 101.

[0030] Multiple U-shaped nozzles 303 are evenly arranged vertically and evenly distributed, and the multiple U-shaped nozzles 303 are connected and communicated with the vertical part of the 7-shaped connecting pipe 302;

[0031] The outer and inner sides of the spiral nozzle 303 are provided with nozzle holes 304, and multiple nozzle holes 304 are evenly arranged along the rectangular trajectory of the spiral nozzle 303.

[0032] The oil change assembly 2 includes an L-shaped bracket 201, an oil reservoir 202, an oil filler port 203, a connecting pipe 204, and an oil drain port 205;

[0033] The oil tank 202 is fixed to one side of the top of the oil tank body 101 by an L-shaped bracket 201. The connecting pipe 204 is fixed to the top of the oil tank 202 and is connected to the oil tank 202. The filling port 203 is fixed between the bottom of the oil tank 202 and the top of the top cover 102, and the two ends of the filling port 203 are connected to the inner cavity of the L-shaped bracket 201 and the inner cavity of the oil tank body 101, respectively.

[0034] The oil drain port 205 is fixed to one side of the oil tank body 101 near the bottom and is in communication with the inner cavity of the oil tank body 101.

[0035] In this embodiment, it should be noted that when the transformer is in normal use, the oil filling port 203, the oil drain port 205, and the return port 301 are sealed with threaded plugs to ensure the sealing of the internal space of the oil tank body 101.

[0036] When it is necessary to replace the insulating oil inside the main body of the oil tank 101, remove the threaded plugs on the oil filling port 203 and the oil drain port 205 in sequence. At this time, the insulating oil inside the main body of the oil tank 101 and the oil storage tank 202 can be discharged through the oil drain port 205. The discharged insulating oil can be recycled and regenerated by external insulating oil regeneration equipment.

[0037] After all the insulating oil has been drained, the threaded plug on the return port 301 can be removed, and the return port 301 can be connected to the output end of the external insulating cleaning fluid storage tank through a water pipe and water pump. Then, the water pump is started to deliver the insulating cleaning fluid to the return port 301, and it is diverted to each return-type spray pipe 303 through the 7-shaped connecting pipe 302. Finally, it is sprayed out through the spray hole 304. The sprayed insulating cleaning fluid can impact the inner wall of the oil tank body 101 and the winding surface inside the oil tank body 101, causing the sludge and residue on the inner wall of the oil tank body 101 and the winding surface inside the oil tank body 101 to fall off and be discharged from the oil drain port 205 along with the insulating cleaning fluid (it should be noted that at this time, the oil drain port 205 is disconnected from the external insulating oil regeneration equipment and connected to the insulating cleaning fluid collection tank).

[0038] By observing the state of the discharged insulating cleaning fluid, the cleaning status inside the tank body 101 can be determined. After cleaning, the water pipe on the return port 301 can be disconnected and connected to the air pump through the air pipe. The air pump will deliver high-pressure air (which can be preheated to a certain temperature to dry the residual insulating cleaning fluid) into the tank body 101 to spray and dry the residual insulating cleaning fluid. At this time, the air inside the tank body 101 can be discharged simultaneously through the drain port 205 and the fill port 203.

[0039] The above operations can be used to clean the sludge and residue inside the main body 101 of the oil tank. After that, the return 301 and the drain port 205 are sealed. Finally, the regenerated insulating oil (or new insulating oil) is injected into the oil storage tank 202 through the filling port 203 and flows into the main body 101 of the oil tank through the connecting pipe 204. Finally, the filling port 203 is sealed.

[0040] Please refer to this carefully. Figures 1-3 The inner diameter of the return port 301 and the 7-shaped connecting pipe 302 is larger than the inner diameter of the return nozzle 303. The outer wall dimension of the trajectory of the return nozzle 303 is smaller than the inner wall dimension of the fuel tank body 101. The inner dimension of the trajectory of the return nozzle 303 is larger than the outer dimension of the internal winding of the fuel tank body 101.

[0041] In this embodiment: this structure allows the flow rate inside the return port 301 and the 7-shaped connecting pipe 302 to meet the flow rate of multiple return nozzles 303;

[0042] Additionally, the size of the 303 rotary nozzle is larger than the outer dimension of the winding, so it will not interfere with the normal operation of the transformer.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A transformer for easy replacement of insulating oil, comprising a transformer casing (1) consisting of a tank body (101) and a top cover (102), wherein the top cover (102) is bolted to the top of the tank body (101) to seal the top of the tank body (101), and an oil changing assembly (2) is provided on the top of the top cover (102) and one side of the tank body (101), wherein the oil changing assembly (2) is used to perform the replacement operation of the insulating oil inside the tank body (101), characterized in that, The oil tank body (101) is provided with a backwashing assembly (3) inside, which is used to perform impact cleaning operation on the inner surface of the oil tank body (101); The backwash assembly (3) includes a return port (301), a 7-shaped connecting pipe (302), a return-shaped nozzle (303), and a spray hole (304); The return port (301) is fixed to the top of the outer wall of the tank body (101) and communicates with the inner cavity of the tank body (101). The 7-shaped connecting pipe (302) is distributed on the inner side of the tank body (101) and communicates with the return port (301). The return nozzle (303) is fixed to the outside of the 7-shaped connecting pipe (302) and communicates with the 7-shaped connecting pipe (302). The nozzle (304) is opened on the outside of the return nozzle (303). The insulating cleaning fluid is delivered through the return port (301) and the 7-shaped connecting pipe (302) to the inside of the return nozzle (303) and sprayed out through the nozzle (304) to achieve the flushing and cleaning operation of the inner wall of the oil tank body (101).

2. A transformer with easily replaceable insulating oil according to claim 1, characterized in that, The spiral nozzles (303) are evenly arranged vertically and distributed in multiple ways. The spiral nozzles (303) are connected to the vertical part of the figure-7 connecting pipe (302).

3. A transformer for easy replacement of insulating oil according to claim 1, characterized in that, The outer and inner sides of the spiral nozzle (303) are provided with nozzle holes (304), and multiple nozzle holes (304) are evenly arranged along the rectangular trajectory of the spiral nozzle (303).

4. A transformer with easily replaceable insulating oil according to claim 1, characterized in that, The oil change assembly (2) includes an L-shaped bracket (201), an oil reservoir (202), an oil filling port (203), a connecting pipe (204), and an oil drain port (205); The oil tank (202) is fixed to the top side of the oil tank body (101) by an L-shaped bracket (201). The connecting pipe (204) is fixed to the top of the oil tank (202) and is connected to the oil tank (202). The filling port (203) is fixed between the bottom of the oil tank (202) and the top of the top cover (102). The two ends of the filling port (203) are connected to the inner cavity of the L-shaped bracket (201) and the inner cavity of the oil tank body (101), respectively. The oil drain port (205) is fixed to the bottom side of the oil tank body (101) and is in communication with the inner cavity of the oil tank body (101).

5. A transformer for easy replacement of insulating oil according to claim 1, characterized in that, The inner diameter of the return port (301) and the figure-7 connecting pipe (302) is larger than the inner diameter of the return nozzle (303). The outer wall dimension of the trajectory of the return nozzle (303) is smaller than the inner wall dimension of the fuel tank body (101). The inner dimension of the trajectory of the return nozzle (303) is larger than the outer dimension of the internal winding of the fuel tank body (101).

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