Oil circulating cooling type transformer

Abstract

An oil circulation cooling type transformer relates to the technical field of transformer oil cooling and comprises an oil tank, a transformer body in the oil tank and a cooling device arranged on one side of the oil tank and communicated with the oil tank. The upper cooling pipe and the lower cooling pipe are transversely arranged on the upper portion and the lower portion of the circulating box respectively, the middle cooling pipe is communicated between the upper cooling pipe and the lower cooling pipe, the two ends of the upper cooling pipe extend out of the circulating box to be communicated with an external cooling water source, and one end of the lower cooling pipe extends out of the circulating box to be communicated with external water collecting equipment. And a circulating pump is connected between the lower part of the circulating box and the oil tank. Through the special design of the cooling pipes in the circulation box, cooling of oil liquid is accelerated, the cooling effect is improved, the oil liquid returns to the oil tank after being fully cooled, and therefore the service life of the transformer is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer oil cooling technical field, concretely is an oil liquid circulation cooling type transformer. BACKGROUND

[0002] The transformer is one of indispensable equipment in distribution system, and is mainly divided into dry-type transformer and oil immersed transformer, the body (including winding and iron core) of oil immersed transformer is installed in the oil tank full of transformer oil, the oil tank is constituted by tank shell and tank cover, wherein the body is placed in the inside of tank shell, and the body can be lifted out to maintain or overhaul by opening the tank cover.

[0003] In the working process, along with the rise of power consumption, the transformer load increases, and more heat is generated, if in high load state for a long time without taking appropriate cooling measures, the oil immersed transformer is easy to be damaged, traditionally, people adopt the method of manually replacing the hot oil in the oil tank to reduce the temperature, but this method is not only cumbersome but also inefficient, in order to solve this problem, some new transformer designs with automatic cooling function appear in the market, aiming at replacing the traditional manual oil replacement mode, so as to improve the operation efficiency, however, in practical application, it is found that these transformers still have limitations.

[0004] Taking the oil immersed transformer with automatic filtering oil function with the application number CN202211108705.6 as an example, the transformer is designed with a circulating tank located below the oil tank and communicated with the oil tank, a detachable filter screen is installed above the circulating tank, and a circulating pump is arranged at the bottom, in theory, when the oil liquid passes through the filter screen, the purposes of cleaning and cooling can be realized at the same time, and then the treated oil is sent back to the oil tank through the circulating pump, so as to achieve the effect of automatic cooling and oil replacement, but for the oil liquid with high temperature, only relying on the process of flowing from the oil tank into the circulating tank and returning is not enough to effectively reduce the temperature, so that the oil temperature returned to the oil tank is still high, and the service life of the transformer is low. UTILITY MODEL CONTENTS

[0005] In order to solve the technical problems in the above background art, the utility model provides an oil liquid circulation cooling type transformer.

[0006] The utility model technical scheme is as follows:

[0007] An oil liquid circulation cooling type transformer, comprising an oil tank and a transformer body inside the oil tank, and a cooling device arranged on one side of the oil tank and communicated with the oil tank, the cooling device is used for cooling the oil liquid in the oil tank to protect the transformer body inside the oil tank from being damaged, wherein the transformer body is prior art, which is not described in detail here.

[0008] As the core technical concept of the utility model, the cooling device comprises a circulating tank and a cooling assembly in the circulating tank, the cooling assembly comprises upper cooling pipes and lower cooling pipes horizontally arranged at upper and lower portions of the circulating tank respectively, and an intermediate cooling pipe communicated between the upper cooling pipes and the lower cooling pipes, the upper cooling pipes are communicated with an external cooling water source at both ends thereof and extend out of the circulating tank, one end of the lower cooling pipe is communicated with an external water collecting device and extends out of the circulating tank, and a circulating pump is connected between the lower portion of the circulating tank and an oil tank.

[0009] In use, high-temperature oil in the oil tank flows into the circulating tank and is cooled by the cooling assembly before returning to the oil tank for continuous use, and the high-temperature oil flowing into the circulating tank is gathered from the bottom of the circulating tank, and the lower cooling pipes can continuously cool the high-temperature oil; the part of the oil flowing into the circulating tank with a higher temperature has a smaller density and is located at the upper portion of the circulating tank, and the upper cooling pipes communicated with the external cooling water source can effectively cool this part of the oil in time; the transformer can quickly and effectively cool the high-temperature oil under the cooperation of the upper cooling pipes, the lower cooling pipes and the intermediate cooling pipe.

[0010] As a preferred implementation, the upper cooling pipes, the lower cooling pipes and the intermediate cooling pipe are all wave-shaped pipes to increase the contact area with the oil and further improve the cooling effect.

[0011] Further, a first temperature switch is arranged at the top of the oil tank, the bottom of the oil tank is communicated with the top of the circulating tank through a first electric valve, and the first temperature switch, the first electric valve and the circulating pump are electrically connected to realize automatic circulation of the cooling oil in the oil tank.

[0012] To further improve the cooling efficiency and effect, a water pump is arranged at one side of the circulating tank, and both ends of the upper cooling pipes are communicated with the external cooling water source through the water pump, so that the external cooling water source can quickly flow into each cooling pipe under the action of the water pump to quickly perform the cooling work and further improve the cooling efficiency and effect.

[0013] As a further preferred implementation, a second temperature switch is arranged at the middle portion of the circulating tank, the lower cooling pipes are communicated with the external water collecting device through a second electric valve, and the second temperature switch, the water pump and the second electric valve are electrically connected to realize automatic replacement of the cooling water in each cooling pipe.

[0014] To filter the oil in the oil tank, a filter screen is further arranged in the circulating tank and located at the upper side of the upper cooling pipes, so that the oil passing through the filter screen can be cleaned and cooled, and the oil dirt and other impurities in the oil are prevented from adhering to each cooling pipe or flowing into the circulating tank.

[0015] In order to facilitate the treatment of impurities on the filter screen, the filter screen is arranged obliquely, and the circulating box is respectively provided with an impurity pushing machine and a slag outlet on the two sides corresponding to the height of the filter screen, so that the impurities are pushed out of the slag outlet by the impurity pushing machine, which is convenient for cleaning compared with manually dismounting the filter screen.

[0016] Specifically, the oil dirt pushing machine comprises a telescopic cylinder arranged on one side of the circulating box and a pushing plate slidingly matched with the upper side of the filter screen and pushed by the telescopic cylinder, the pushing plate is located in the circulating box, the piston rod of the telescopic cylinder extends into the circulating box from the outside and is connected with the pushing plate, and a sealing structure is further arranged at the connecting position for sealing, and the slag outlet is generally blocked by a sealing plug, which is opened when the impurities need to be discharged, thereby facilitating the cleaning of the impurities.

[0017] The oil liquid circulating cooling type transformer is characterized in that the filter screen is vertically inserted and connected with the circulating box, so that the filter screen is convenient to replace and maintain.

[0018] The oil liquid circulating cooling type transformer is characterized in that the filter screen is vertically inserted and connected with the circulating box, so that the filter screen is convenient to replace and maintain. BRIEF DESCRIPTION OF DRAWINGS

[0019] In the drawings:

[0020] Figure 1 It is an internal structure schematic view of the oil liquid circulating cooling type transformer.

[0021] Figure 2 It is an internal structure schematic view of the oil liquid circulating cooling type transformer. Figure 1

[0022] The components represented by the reference numerals in the drawings are:

[0023] 1, support; 2, oil tank; 3, transformer body; 4, cooling device; 41, circulating box; 42, filter screen; 43, upper cooling pipe; 44, lower cooling pipe; 45, middle cooling pipe; 46, water pump; 47, second temperature switch; 48, second electric valve; 49, slag outlet; 5, first temperature switch; 6, circulating pump; 7, first electric valve; 8, pushing plate. DETAILED DESCRIPTION

[0024] In combination with Figure 1 , the oil liquid circulating cooling type transformer comprises a support 1, a transformer main body and a cooling device 4 arranged on the support 1, the transformer main body comprises an oil tank 2 and a transformer body 3 in the oil tank 2, and the cooling device 4 is arranged on the lower side of the oil tank 2 and communicates with the bottom of the oil tank 2, so as to cool the oil liquid in the oil tank 2 and protect the transformer body 3 in the oil tank 2 from being damaged. ​

[0025] For the structure of the cooling device 4, in particular in combination Figure 2 Said cooling device 4 comprises a circulating tank 41 and a cooling assembly inside the tank, the cooling assembly comprises an upper cooling pipe 43 and a lower cooling pipe 44 respectively arranged at the upper and lower parts of the circulating tank 41, and an intermediate cooling pipe 45 connected between the upper cooling pipe 43 and the lower cooling pipe 44, the two ends of the upper cooling pipe 43 respectively extend out of the circulating tank 41 to be connected with an external cooling water source, one end of the lower cooling pipe 44 extends out of the circulating tank 41 to be connected with an external water collecting device, and a circulating pump 6 is connected between the lower part of the circulating tank 41 and the oil tank 2.

[0026] In use, the high-temperature oil liquid in the oil tank 2 flows into the circulating tank 41 and is cooled by the cooling assembly, and then returns to the oil tank 2 for continuous use. After the high-temperature oil liquid flows into the circulating tank 41, it will start to accumulate from the bottom of the circulating tank 41, and the lower cooling pipe 44 can continuously cool the high-temperature oil liquid. The part of the oil liquid flowing into the circulating tank 41 with higher temperature has smaller density and will be at the upper part of the circulating tank 41, at this time the upper cooling pipe 43 connected with the external cooling water source can effectively cool this part of the oil liquid in time. Under the cooperation of the upper cooling pipe 43, the lower cooling pipe 44 and the intermediate cooling pipe 45, the high-temperature oil liquid can be quickly and effectively cooled, and the oil liquid in the oil tank 2 is circulated and cooled by the circulating pump 6, which is very convenient and efficient.

[0027] The upper cooling pipe 43, the lower cooling pipe 44 and the intermediate cooling pipe 45 are all wave-shaped pipes to increase the contact area with the oil liquid and further improve the cooling effect.

[0028] It can be understood that the positions where the upper cooling pipe 43 and the lower cooling pipe 44 are connected with the oil tank 2 are provided with sealing structures to prevent the oil liquid from leaking from the positions.

[0029] The top of the oil tank 2 is provided with a first temperature switch 5, and the bottom is connected with the top of the circulating tank 41 through a first electric valve 7, and the first temperature switch 5, the first electric valve 7 and the circulating pump 6 are electrically connected to realize the automatic circulation of the cooling oil liquid in the oil tank 2.

[0030] In use, when the temperature of the oil liquid in the oil tank 2 rises, the contacts of the first temperature switch 5 are closed, the first electric valve 7 and the circulating pump 6 are opened, the high-temperature oil liquid in the oil tank 2 flows into the circulating tank 41, and the cooled oil liquid in the circulating tank 41 flows back to the oil tank 2.

[0031] A water pump 46 is arranged on one side of the circulating tank 41, and the two ends of the upper cooling pipe 43 are connected with the external cooling water source through the water pump 46, so that the external cooling water source can quickly flow into each cooling pipe under the action of the water pump 46 to quickly perform the cooling work, and further improve the cooling efficiency and effect.

[0032] The circulation tank 41 is equipped with a second temperature switch 47 in the middle. The lower cooling pipe 44 is connected to the external water collection device through the second electric valve 48. The second temperature switch 47, the water pump 46 and the second electric valve 48 are electrically connected to realize the automatic replacement of cooling water in each cooling pipe.

[0033] When in use, when the oil temperature inside the circulation tank 41 remains at a high temperature, the contacts of the second temperature switch 47 close, the second electric valve 48 and the water pump 46 open, the high-temperature water in each cooling pipe flows into the external water collection device, and the cooling water enters each cooling pipe from the water pump 46.

[0034] The circulation box 41 is also equipped with a filter screen 42, which is located on the upper side of the upper cooling pipe 43. The oil can be cleaned and cooled by passing through the filter screen 42. At the same time, it prevents impurities such as oil stains in the oil from adhering to the cooling pipes or flowing into the circulation box 41 and becoming difficult to clean.

[0035] The filter screen 42 is tilted, and the circulation box 41 is equipped with an impurity pusher and a slag outlet on the two sides corresponding to the height of the filter screen 42, so that the impurities are pushed out from the slag outlet by the impurity pusher. This is more convenient than manually removing the filter screen 42 for cleaning. In addition, the filter screen 42 is vertically connected to the circulation box 41 to facilitate the replacement and maintenance of the filter screen 42.

[0036] Specifically, the oil sludge pusher includes a telescopic cylinder located on one side of the circulation tank 41 and a push plate 8 that is pushed by the telescopic cylinder and slides on the upper side of the filter screen. The push plate 8 is located inside the circulation tank 41. The piston rod of the telescopic cylinder extends from the outside of the circulation tank 41 into its interior and connects with the push plate 8. The connection position is also equipped with a sealing structure. The sludge outlet 49 is generally blocked by a sealing plug. It is opened when it is necessary to discharge impurities, which facilitates the cleaning of impurities.

[0037] like Figure 1 As shown, the outer wall of the oil tank 2 is also provided with several heat dissipation fins. The oil tank 2 is cylindrical, and the inside of the oil tank 2 is also provided with a mesh scraper with a circular cross-section. The scraper is located between the transformer body 3 and the inner wall of the oil tank 2. The bottom of the oil tank 2 is provided with a servo motor, the output end of which extends into the inside of the oil tank 2 and is connected to the lower side of the scraper through a connecting strip. The scraper is driven to rotate by the servo motor and slides against the inner wall of the oil tank 2, thereby scraping off the oil stains and impurities adhering to the inner wall of the oil tank 2, thereby improving the heat dissipation performance of the heat dissipation fins on the outer side of the oil tank 2. Finally, with the cooperation of the cooling device 4, the service life of the transformer is further improved.

Claims

1. An oil-circulating cooled transformer, characterized in that, Includes an oil tank (2) and the transformer body (3) inside it, as well as a cooling device (4) located on one side of the oil tank (2) and connected thereto; The cooling device (4) includes a circulation tank (41) and a cooling assembly inside it. The cooling assembly includes an upper cooling pipe (43) and a lower cooling pipe (44) that are respectively arranged horizontally at the upper and lower parts of the circulation tank (41), and an intermediate cooling pipe (45) that connects the upper cooling pipe (43) and the lower cooling pipe (44). The upper cooling pipe (43) extends out of the circulation tank (41) at both ends and is connected to the external cooling water source. The lower cooling pipe (44) extends out of the circulation tank (41) and is connected to the external water collection device. A circulation pump (6) is connected between the lower part of the circulation tank (41) and the oil tank (2). The upper cooling pipe (43), lower cooling pipe (44) and intermediate cooling pipe (45) are all corrugated pipes.

2. The oil-circulating cooled transformer as described in claim 1, characterized in that, The oil tank (2) is equipped with a first temperature switch (5) at the top and is connected to the top of the circulation tank (41) at the bottom through a first electric valve (7). The first temperature switch (5), the first electric valve (7) and the circulation pump (6) are electrically connected.

3. The oil-circulating cooled transformer as described in claim 2, characterized in that, A water pump (46) is provided on one side of the circulation tank (41), and both ends of the upper cooling pipe (43) are connected to an external cooling water source through the water pump (46).

4. The oil-circulating cooled transformer as described in claim 3, characterized in that, The circulation tank (41) is equipped with a second temperature switch (47) in the middle. The lower cooling pipe (44) is connected to the external water collection device through the second electric valve (48). The second temperature switch (47), the water pump (46), and the second electric valve (48) are electrically connected.

5. An oil-circulating cooled transformer as described in any one of claims 1-4, characterized in that, The circulation box (41) is also equipped with a filter screen (42), which is located on the upper side of the upper cooling pipe (43).

6. The oil-circulating cooled transformer as described in claim 5, characterized in that, The filter screen (42) is inclined, and the circulation box (41) is provided with an impurity pusher and a slag outlet (49) on both sides corresponding to the height of the filter screen (42).

7. The oil-circulating cooled transformer as described in claim 6, characterized in that, The impurity pusher includes a telescopic cylinder and a push plate (8) that is pushed by the cylinder and slides on the upper side of the filter screen (42).

8. The oil-circulating cooled transformer as described in claim 5, characterized in that, The filter screen (42) is vertically connected to the circulation box (41).

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