CN221927717U - Explosion-proof oil immersed transformer - Google Patents

Abstract

The utility model discloses an explosion-proof oil immersed transformer, which comprises an oil tank structure, wherein a plurality of pressure relief assemblies are uniformly arranged at the top of the oil tank structure, an oil filtering assembly is arranged at the top of the oil tank structure, the pressure relief assembly comprises a pressure relief pipe fixedly arranged at the top of the oil tank structure, a one-way valve is arranged at the top of the pressure relief pipe, a groove-shaped strip is fixedly arranged on the inner wall of the pressure relief pipe, a pressure sensor electrically connected with the one-way valve is arranged on the top wall of the groove-shaped strip, a T-shaped block is slidably arranged in the groove-shaped strip, a hanging rod positioned in the oil tank structure is fixedly arranged at one side of the T-shaped block, and a floating plate is arranged at the bottom of the hanging rod. According to the utility model, the operation is independently triggered through the plurality of pressure relief assemblies, the triggering sensitivity is higher, the pressure relief is more timely, in addition, the impurity can be filtered and removed from the oil in the oil tank structure, and the impurity backflow can be effectively prevented.

Description

An explosion-proof oil-immersed transformer

Technical Field

The utility model relates to the technical field of transformers, in particular to an explosion-proof oil-immersed transformer.

Background Art

Oil-immersed transformers can convert the high voltage of the input power supply into the required low voltage, or increase the low voltage to the required high voltage to meet the voltage requirements of different equipment. In addition, they can also play an important role in the power transmission process. By providing corresponding voltage conversion, electric energy is transmitted from the power plant to various power consumption areas to meet different power needs. The oil-immersed transformer is composed of a main winding, a secondary winding, an iron core and insulating oil. The insulating oil is used to fix the position of the winding, and it also plays the role of electrical insulation and cooling. When the current passes through the coil, current loss will be generated in the coil and the iron core. This part of the loss will be converted into heat energy, causing the temperature of the insulating oil to rise. If the oil temperature is too high, it is easy to reduce the insulation performance of the insulating oil. At the same time, the internal temperature of the transformer cannot be stably controlled, which leads to thermal runaway and explosion. Therefore, the necessity of effective pressure relief for oil-immersed transformers is self-evident. The existing oil-immersed Most transformers monitor the vaporization state of the oil inside the oil tank. When it exceeds the standard, the pressure is released by opening the pressure relief valve. The airflow has a large momentum during a single pressure release, so the impact on the external structure is strong, and the safety is slightly lower. At the same time, a single pressure relief valve structure is used to release the pressure, so that the vaporized oil around the pressure relief valve is discharged more efficiently than the vaporized oil farther away, resulting in slightly lower balance, uneven electric field distribution in the winding, increased electrical stress in some windings, and overheating in the area, which affects the service life of the transformer.

Utility Model Content

In view of the deficiencies in the prior art, the purpose of the utility model is to provide an explosion-proof oil-immersed transformer to solve the problem raised in the above background technology that when some existing oil-immersed transformers are depressurized, the balance of the oil pressure discharge inside the oil tank is slightly low, which affects the service life of the transformer.

To achieve the above object, the utility model provides the following technical solutions: an explosion-proof oil-immersed transformer, comprising an oil tank structure, a plurality of evenly arranged pressure relief components are installed on the top of the oil tank structure, and an oil filter component is installed on the top of the oil tank structure;

The pressure relief assembly includes a pressure relief pipe fixedly installed on the top of the oil tank structure, a one-way valve is installed on the top of the pressure relief pipe, a groove bar is fixedly installed on the inner wall of the pressure relief pipe, a pressure sensor electrically connected to the one-way valve is installed on the top wall of the groove bar, a T-block is slidably installed inside the groove bar, a suspension rod inside the oil tank structure is fixedly installed on one side of the T-block, and a floating plate is installed on the bottom of the suspension rod.

Preferably, an annular mesh plate is fixedly mounted on the top of the one-way valve, and an umbrella-shaped baffle plate is fixedly mounted on the top of the annular mesh plate.

Preferably, the oil filter assembly comprises a processing structure placed on the top surface of the oil tank structure, and a vertically arranged filter plate is fixedly mounted on the middle part of the inner wall of the processing structure.

Preferably, the oil filter assembly also includes an oil pump fixedly mounted on the top surface of the oil tank structure, and the output end of the oil pump extends into the interior of the oil tank structure, the input end of the oil pump is fixedly connected to a position higher on the back of the processing structure through a flange, and a conduit extending into the interior of the oil tank structure is fixedly connected to a position lower on the front of the processing structure through a flange.

Preferably, three high-pressure outlet terminals and three low-pressure outlet terminals arranged side by side are installed on the top of the oil tank structure, and an oil pillow is installed on the top of the oil tank structure.

Preferably, two C-shaped seat structures arranged in a mirror image are fixedly mounted on the bottom of the oil tank structure, and a radiator is mounted on the outer surface of the oil tank structure.

Compared with the prior art, the beneficial effects of the utility model are:

1. In the utility model, a plurality of independent pressure relief components are used to trigger pressure relief when the oil inside the oil tank structure space vaporizes to a certain degree. Whether to perform pressure relief is determined according to the vaporization of the oil around the bottom of each pressure relief component inside the oil tank structure space. The triggering sensitivity is high, and the pressure discharge is more timely. In addition, the plurality of pressure relief components are triggered according to the vaporization state of the oil in the range, which can make the pressure relief more balanced. In addition, the plurality of pressure relief components complement each other. When one of the pressure relief components fails, the overall pressure relief is less affected.

2. In the utility model, the transformer oil in the oil tank structure is extracted by the oil pump, and the oil is forced to pass through the processing structure with the filter plate to filter the impurities in the oil. At the same time, due to the obstruction of the filter plate and the high position of the connection between the oil pump and the processing structure, the backflow of impurities can be effectively avoided.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the overall structure of the utility model;

FIG2 is a schematic diagram of the structure of the oil filter assembly of the utility model;

FIG3 is a schematic diagram of the structure of the pressure relief assembly of the utility model;

FIG. 4 is a schematic diagram of the installation structure of the pressure relief pipe and the grooved bar of the utility model.

In the figure: 1. oil tank structure; 101. high-pressure outlet terminal; 102. low-pressure outlet terminal; 103. oil pillow; 104. C-type seat structure; 105. radiator; 2. pressure relief assembly; 201. pressure relief pipe; 202. one-way valve; 2021. annular mesh plate; 2022. umbrella-shaped baffle; 203. grooved bar; 204. pressure sensor; 205. T-block; 206. suspension rod; 207. floating plate; 3. oil filter assembly; 301. processing structure; 3011. filter plate; 302. oil pump; 303. conduit.

DETAILED DESCRIPTION

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

In order to solve the problem that the balance of oil pressure discharge inside the oil tank is slightly low when the pressure is released in some existing oil-immersed transformers, which affects the service life of the transformer, please refer to Figures 1 to 4, an embodiment of the utility model is provided:

An explosion-proof oil-immersed transformer comprises an oil tank structure 1, a plurality of evenly arranged pressure relief components 2 are installed on the top of the oil tank structure 1, and an oil filter component 3 is installed on the top of the oil tank structure 1;

The pressure relief assembly 2 includes a pressure relief pipe 201 fixedly mounted on the top of the oil tank structure 1, a one-way valve 202 is mounted on the top of the pressure relief pipe 201, a groove bar 203 is fixedly mounted on the inner wall of the pressure relief pipe 201, a pressure sensor 204 electrically connected to the one-way valve 202 is mounted on the top wall of the groove bar 203, a T-shaped block 205 is slidably mounted inside the groove bar 203, a suspension rod 206 located inside the oil tank structure 1 is fixedly mounted on one side of the T-shaped block 205, and a floating plate 207 is mounted on the bottom of the suspension rod 206;

Specifically, in the present oil-immersed transformer, the windings and the core are distributed inside the space of the oil tank structure 1. As for the transformer oil of a set amount injected into the oil tank structure 1, in the process of the transformer oil being heated and vaporized into bubbles and floating upward, the floating plate 207 on the surface of the oil can be driven to move upward to a position, and at this time, an upward driving force is generated on the suspension rod 206 and the T-block 205, so that the T-block 205 slides from bottom to top along the inside of the groove bar 203, and then triggers the pressure sensor 204, and then the one-way valve 202 electrically connected to the pressure sensor 204 is opened, so that the entire pressure relief component 2 is adjusted from a closed state to a dredged state, so that the vaporized oil inside the space of the oil tank structure 1 is discharged to the external environment along the channel of the pressure relief component 2, so as to achieve the purpose of pressure relief, and the multiple pressure relief components 2 are independent of each other, so that the pressure relief is not determined by the overall pressure inside the entire oil tank structure 1, but is determined according to the vaporization of the oil around the bottom of each pressure relief component 2 inside the space of the oil tank structure 1. The triggering sensitivity is higher and the pressure relief is more timely.

Furthermore, an annular mesh plate 2021 is fixedly installed on the top of the one-way valve 202, and an umbrella-shaped baffle 2022 is fixedly installed on the top of the annular mesh plate 2021. The umbrella-shaped baffle 2022 provides a protective effect for the top of the annular mesh plate 2021 to prevent foreign debris from falling into the channel of the pressure relief component 2. In addition, the holes and grooves on the annular mesh plate 2021 serve as channels for the vaporization and discharge of oil.

1 and 2, the oil filter assembly 3 includes a processing structure 301 placed on the top surface of the oil tank structure 1, a filter plate 3011 arranged vertically is fixedly installed in the middle of the inner wall of the processing structure 301, and the oil filter assembly 3 also includes an oil pump 302 fixedly installed on the top surface of the oil tank structure 1, and the output end of the oil pump 302 extends into the interior of the oil tank structure 1, the input end of the oil pump 302 is fixedly connected to the upper position of the back of the processing structure 301 through a flange, and a conduit 303 extending into the interior of the oil tank structure 1 is fixedly connected to the lower position of the front of the processing structure 301 through a flange;

Specifically, by running the oil pump 302, the transformer oil inside the space of the oil tank structure 1 is pumped into the processing structure 301 along its input end, and then discharged into the space of the oil tank structure 1 again along the conduit 303. During the process, the transformer oil will be filtered through the filter plate 3011, and the impurities in the oil will be reserved on the rear side of the filter plate 3011 inside the processing structure 301. Due to the obstruction of the filter plate 3011 and the high position of the connection between the oil pump 302 and the processing structure 301, the backflow of impurities can be effectively avoided. In addition, the processing structure 301 can also be installed at the input end of the oil pump 302 without limitation, so as to achieve the purpose of filtering the oil and preventing the backflow of impurities.

As shown in Figure 1, three high-voltage outlet terminals 101 and three low-voltage outlet terminals 102 arranged side by side are installed on the top of the oil tank structure 1. High-voltage leads and low-voltage leads are respectively led out from the windings inside the oil tank structure 1 to connect with the high-voltage outlet terminals 101 and the low-voltage outlet terminals 102. An oil pillow 103 is installed on the top of the oil tank structure 1. The oil pillow 103 plays a role in supporting, dissipating heat and protecting the windings, so that the transformer can operate normally and improve its reliability and life. Two mirror-arranged C-shaped seat structures 104 are fixedly installed on the bottom of the oil tank structure 1, and a radiator 105 is installed on the outer surface of the oil tank structure 1 to dissipate heat.

It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims (6)

1. The utility model provides an explosion-proof formula oil-immersed transformer, includes oil tank structure (1), its characterized in that: a plurality of pressure relief assemblies (2) which are uniformly arranged are arranged at the top of the oil tank structure (1), and an oil filtering assembly (3) is arranged at the top of the oil tank structure (1);

The pressure relief assembly (2) comprises a pressure relief pipe (201) fixedly installed at the top of the oil tank structure (1), a one-way valve (202) is installed at the top of the pressure relief pipe (201), a groove-shaped strip (203) is fixedly installed on the inner wall of the pressure relief pipe (201), a pressure sensor (204) electrically connected with the one-way valve (202) is installed on the top wall of the groove-shaped strip (203), a T-shaped block (205) is installed in the groove-shaped strip (203) in a sliding mode, a hanging rod (206) located in the oil tank structure (1) is fixedly installed on one side of the T-shaped block (205), and a floating plate (207) is installed at the bottom of the hanging rod (206).

2. An explosion-proof oil immersed transformer according to claim 1, wherein: an annular screen plate (2021) is fixedly arranged at the top of the one-way valve (202), and an umbrella-shaped baffle plate (2022) is fixedly arranged at the top of the annular screen plate (2021).

3. An explosion-proof oil immersed transformer according to claim 1, wherein: the oil filtering assembly (3) comprises a processing structure (301) arranged on the top surface of the oil tank structure (1), and a filter plate (3011) which is vertically arranged is fixedly arranged in the middle of the inner wall of the processing structure (301).

4. An explosion-proof oil immersed transformer according to claim 3, wherein: the oil filtering assembly (3) further comprises an oil pump (302) fixedly installed on the top surface of the oil tank structure (1), the output end of the oil pump (302) extends into the oil tank structure (1), the input end of the oil pump (302) is fixedly connected with the position, above the back surface, of the treatment structure (301) through a flange, and the position, below the front surface, of the treatment structure (301) is fixedly connected with a guide pipe (303) extending into the oil tank structure (1) through the flange.

5. An explosion-proof oil immersed transformer according to claim 1, wherein: three high-voltage outlet terminals (101) and three low-voltage outlet terminals (102) which are arranged side by side are arranged at the top of the oil tank structure (1), and a conservator (103) is arranged at the top of the oil tank structure (1).

6. An explosion-proof oil immersed transformer according to claim 1, wherein: the bottom of the oil tank structure (1) is fixedly provided with two C-shaped seat structures (104) which are arranged in a mirror image mode, and the outer surface of the oil tank structure (1) is provided with a radiator (105).