A breathing apparatus for transformer

Abstract

The present invention proposes a respirator device for a transformer, comprising a first hollow filter and a second hollow filter, a connecting pipe, and an oil cup, wherein a first connecting piece is provided at the open end of the first filter, a second connecting piece is provided at the open end of the second filter, and the first connecting piece and the second connecting piece are detachably connected; the other end of the first filter is connected to one end of the connecting pipe, and the other end of the connecting pipe is connected to the transformer oil pipe; the other end of the second filter is connected to the oil cup; the first filter and the second filter are filled with a desiccant, and the oil cup is filled with transformer oil. The present invention combines the first filter, the second filter, the connecting pipe, and the oil cup to form a respirator device, which can effectively dry the air entering the transformer oil pipe and prevent moisture in the air from entering the transformer and causing the transformer oil to become damp; the first filter and the second filter are detachably connected, which can effectively improve the replacement efficiency of the desiccant.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and more particularly, to a respirator device for a transformer. Background Art

[0002] The transformer breather is used to keep the internal and external air pressures of the transformer equal by connecting the inside of the transformer with the outside world, thereby preventing the transformer from spraying oil due to the increase in volume of the transformer oil due to temperature rise or full load operation, resulting in increased internal pressure that cannot be released.

[0003] Existing transformer breathers typically consist of a glass cover, upper and lower head components, a glass cylinder, air holes between cups, an oil collection cup, and breather holes. The glass cover contains silica gel particles as a desiccant. However, the breather holes are designed with an overly small diameter, making replacement of the silica gel particles time-consuming. Furthermore, the glass shell easily damages the breather surface, resulting in loss of sealing performance. Summary of the Invention

[0004] The present invention provides a transformer respirator device to overcome the defects of the prior art, such as the difficulty in replacing the desiccant and the imperfect sealing function.

[0005] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0006] A transformer respirator device comprises a hollow first filter and a second filter, a connecting pipe, and an oil cup, wherein a first connecting piece is provided at an open end of the first filter, a second connecting piece is provided at an open end of the second filter, and the first connecting piece and the second connecting piece are detachably connected; the other end of the first filter is connected to one end of the connecting pipe, and the other end of the connecting pipe is connected to the transformer oil pipe; the other end of the second filter is connected to the oil cup; the first filter and the second filter are filled with a desiccant, and the oil cup contains transformer oil.

[0007] In this technical solution, the filter is split into a first filter and a second filter that can be detachably connected. A first connector provided at the open end of the first filter and a second connector provided at the open end of the second filter are connected using parts such as bolts and nuts, thereby achieving a detachable connection between the first and second connectors. During use, a connecting pipe provided at the other end of the first filter is connected to the transformer oil pipe. When the oil temperature in the transformer oil pipe increases, the volume of the oil increases due to thermal expansion and contraction, increasing the air pressure in the transformer oil pipe. Under the action of the air pressure, air in the transformer oil pipe enters the first and second filters through the connecting pipe and is then discharged into the atmosphere through the oil cup. When the oil temperature in the transformer oil pipe decreases, the volume of the oil decreases, reducing the air pressure in the transformer oil pipe. The transformer inhales air through the respirator to achieve internal air pressure balance. The air is dried by the desiccant filled in the first and second filters and then inhaled into the transformer oil pipe, thereby preventing humid air from directly entering the transformer oil pipe and causing the transformer oil to become damp. When the desiccant filled in the filter needs to be replaced, the first and second connectors need only be removed to replace the desiccant.

[0008] Preferably, grooves are respectively provided on the surfaces of the first connecting member and the second connecting member, and sealing strips are provided in the grooves to enhance the sealing performance of the first filter and the second filter.

[0009] Preferably, the outer surfaces of the first filter and the second filter are respectively provided with observation windows, so that operation and maintenance personnel can detect the height and color change of the desiccant through the observation windows to determine whether the desiccant needs to be replaced.

[0010] Preferably, the desiccant includes but is not limited to silica gel particles.

[0011] Preferably, the other end of the connecting tube is provided with a third connector for fixed connection to the transformer oil pipe. The third connector has a groove on its upper surface. The device also includes a sealing ring with a sealing strip on its surface that matches the groove. The outer diameter of the sealing ring is the same as the inner diameter of the transformer oil pipe. The third connector serves as a mounting surface for securing the transformer oil pipe, and the sealing ring is used in conjunction with the third connector to enhance the seal between the third connector and the transformer oil pipe.

[0012] Preferably, evenly distributed vent holes are provided in the connecting pipe for gas circulation and to prevent the desiccant from entering the transformer oil pipe.

[0013] Preferably, an oil cup mounting port is provided at the other end of the second filter, and the opening of the oil cup mounting port is provided with an external thread; an internal thread is provided at one end of the oil cup, and the oil cup is threadedly connected with the external thread of the oil cup mounting port through its internal thread, thereby realizing the installation and fixation of the oil cup and the second filter.

[0014] Preferably, a submersible oil pipe is installed within the oil cup mounting opening. One end of the submersible oil pipe is connected to the interior of the second filter, and the other end of the submersible oil pipe is positioned below the transformer oil level within the oil cup. The submersible oil pipe is used to guide the airway below the transformer oil in the oil cup, preventing the desiccant from prolonged direct contact with air, thereby extending the desiccant's lifespan.

[0015] Preferably, evenly distributed vent holes are provided in the oil cup mounting opening for gas circulation and to prevent desiccant from entering the oil cup.

[0016] Preferably, a filter is provided on one side of the vent hole to further prevent the desiccant from entering the transformer oil pipe or oil cup.

[0017] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: the breather device composed of the first filter, the second filter, the connecting pipe, and the oil cup can effectively dry the air entering the transformer oil pipe, preventing moisture in the air from entering the transformer and causing the transformer oil to become damp; the first filter and the second filter can be detachably connected, which can effectively improve the replacement efficiency of the desiccant and reduce the difficulty of desiccant replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of the transformer respirator device of Example 1.

[0019] Figure 2 This is an exploded view of the transformer respirator device of Example 2.

[0020] Figure 3 This is a schematic structural diagram of the sealing ring of Example 2.

[0021] Figure 4 This is a top view of the transformer respirator device of Example 2.

[0022] Figure 5 This is an exploded view of the transformer respirator device of Example 3.

[0023] Figure 6 This is a bottom view of the transformer respirator device of Example 3.

[0024] Among them, 1-first filter, 11-first connecting piece, 12-slot, 2-second filter, 21-second connecting piece, 22-slot, 23-oil cup mounting port, 24-vent, 3-connecting pipe, 31-third connecting piece, 32-slot, 33-vent, 4-oil cup, 5-sealing strip, 6-observation window, 7-sealing ring, 71-sealing strip, 8-submersible pipe. DETAILED DESCRIPTION

[0025] The accompanying drawings are for illustrative purposes only and are not to be construed as limiting this patent;

[0026] In order to better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size;

[0027] It is understandable to those skilled in the art that some well-known structures and descriptions thereof may be omitted in the drawings.

[0028] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] This embodiment provides a transformer respirator device, such as Figure 1 FIG. 1 is a schematic structural diagram of a transformer respirator device according to an embodiment of the present invention.

[0031] The transformer respirator device proposed in this embodiment includes a hollow first filter 1 and a second filter 2, a connecting pipe 3, and an oil cup 4. A first connector 11 is provided at the open end of the first filter 1, and a second connector 21 is provided at the open end of the second filter 2. The first connector 11 and the second connector 21 are detachably connected. The other end of the first filter 1 is connected to one end of the connecting pipe 3, and the other end of the connecting pipe 3 is connected to the transformer oil pipe to be installed with the transformer respirator device. The other end of the second filter 2 is connected to the oil cup 4. The first filter 1 and the second filter 2 are filled with a desiccant, and the oil cup 4 contains transformer oil.

[0032] In this embodiment, grooves 12 / 22 are respectively provided on the surfaces of the first connecting member 11 and the second connecting member 21, and sealing strips 5 are provided in the grooves 12 / 22 to enhance the sealing performance inside the first filter 1 and the second filter 2. The grooves 12 / 22 are used to prevent the displacement of the sealing strip 5, which may cause the sealing performance of the sealing strip 5 to fail.

[0033] In this embodiment, an observation window 6 is provided on the outer surface of the first filter 1 and the second filter 2 respectively, so that the operation and maintenance personnel can detect the height and color change of the desiccant through the observation window 6 to determine whether the desiccant needs to be replaced.

[0034] In this embodiment, the desiccant filled in the first filter 1 and the second filter 2 is made of silica gel particles.

[0035] In this embodiment, the first filter 1 and the second filter 2 are hollow, and the first filter 1 and the second filter 2 are bell-shaped. The first connecting member 11 and the second connecting member 21 respectively arranged at their opening positions adopt connecting flanges, and a plurality of screw holes are opened on the connecting flanges. The first connecting member 11 and the second connecting member 21 are detachably connected through the screw holes opened therein using nuts, bolts and other parts.

[0036] During the specific implementation process, the connecting pipe 3 is connected to the transformer oil pipe, and the first filter 1 and the second filter 2 are fastened together by nuts, bolts and other parts through the first connecting piece 11 and the second connecting piece 21 set at their openings, thus completing the installation of the respirator device.

[0037] During use, the respirator device is connected to the transformer oil pipe through the connecting pipe 3. When the oil temperature in the transformer oil pipe rises, the volume of the oil increases due to thermal expansion and contraction, and the air pressure in the transformer oil pipe increases. Under the action of the air pressure, the air in the transformer oil pipe enters the first filter 1 and the second filter 2 through the connecting pipe, and is then discharged into the atmosphere from the oil cup 4. When the oil temperature in the transformer oil pipe drops, the volume of the oil decreases, and the air pressure in the transformer oil pipe decreases. The transformer inhales air through the respirator to achieve internal air pressure balance. The air filters dust and impurities in the air through the transformer oil in the oil cup 4, and then is dried by the desiccant filled in the first filter 1 and the second filter 2 before being inhaled into the transformer oil pipe, thereby preventing humid air from directly entering the transformer oil pipe and preventing the transformer oil from getting damp.

[0038] Maintenance personnel can observe the desiccant usage inside the first filter 1 and the second filter 2 through the observation window 5 provided on the outer surface, and then determine whether the desiccant needs to be replaced. When the desiccant filling the first filter 1 and the second filter 2 needs to be replaced, they only need to remove the first connecting member 11 and the second connecting member 21 to replace the desiccant.

[0039] Example 2

[0040] This embodiment provides a transformer respirator device, such as Figure 2 FIG. 1 is an exploded view of the transformer respirator device according to the embodiment of the present invention.

[0041] In the transformer breather device proposed in this embodiment, based on the transformer breather device proposed in embodiment 1, in this embodiment, the other end of the connecting pipe 3 is provided with a third connecting piece 31 fixedly connected to the transformer oil pipe, and a groove 32 is provided on the upper surface of the third connecting piece 3; the device also includes a sealing ring 7, and the surface of the sealing ring 7 is provided with a sealing strip 71 matching the groove 32; the outer diameter of the sealing ring 7 is the same as the inner diameter of the transformer oil pipe. Among them, the third connecting piece 3 adopts a mounting flange, which is used as the mounting surface between the connecting pipe 3 and the transformer oil pipe, and a plurality of threaded holes are provided on its surface. The third connecting piece 3 is connected and fixed to the transformer oil pipe through the threaded holes provided by parts such as bolts and nuts; the sealing ring 7 is used in conjunction with the third connecting piece 31 to enhance the sealing between the third connecting piece 31 and the transformer oil pipe, and the sealing ring 7 matches the size of the transformer oil pipe port. As Figure 3 FIG. 1 is a schematic structural diagram of the sealing ring of this embodiment.

[0042] In this embodiment, the connecting pipe 3 is provided with evenly distributed vent holes 33 for gas circulation and to prevent the desiccant from entering the transformer oil pipe. Figure 4 FIG. 1 is a top view of the transformer respirator device according to the embodiment of the present invention.

[0043] During the specific implementation process, the connecting pipe 3 is fastened to the transformer oil pipe through the third connecting piece 31 provided at the other end thereof using nuts, bolts and other parts, and the first filter 1 and the second filter 2 are fastened to each other through the first connecting piece 11 and the second connecting piece 21 provided at their openings using nuts, bolts and other parts, thus completing the installation of the respirator device.

[0044] During use, the respirator device is connected to the transformer oil pipe via the connecting pipe 3. When the oil temperature in the transformer oil pipe rises, the volume of the oil increases due to thermal expansion and contraction, increasing the air pressure in the transformer oil pipe. Under the action of the air pressure, the air in the transformer oil pipe enters the first filter 1 and the second filter 2 through the connecting pipe, and is then discharged into the atmosphere through the oil cup 4. When the oil temperature in the transformer oil pipe drops, the volume of the oil decreases, reducing the air pressure in the transformer oil pipe. The transformer draws in air through the respirator to achieve internal pressure equilibrium. The air passes through the transformer oil in the oil cup 4, filtering out dust and impurities in the air. The air is then dried by the desiccant filled in the first filter 1 and the second filter 2 before being drawn into the transformer oil pipe, thereby preventing humid air from directly entering the transformer oil pipe and preventing the transformer oil from becoming damp. When the desiccant filled in the first filter 1 and the second filter 2 needs to be replaced, the desiccant can be replaced by simply removing the first connector 11 and the second connector 21.

[0045] In this embodiment, by adding a third connector 3 at the end of the connecting pipe 3 to connect with the transformer oil pipe, the transformer respirator device can be better installed and connected to the transformer oil pipe, ensuring that it is securely installed.

[0046] Example 3

[0047] This embodiment provides a transformer respirator device, such as Figure 5 FIG. 1 is an exploded view of the transformer respirator device of Example 3.

[0048] The transformer breather device proposed in this embodiment, based on the transformer breather device proposed in Example 2, has an oil cup mounting opening 23 formed at the other end of the second filter 2. The opening of the oil cup mounting opening 23 is provided with external threads. One end of the oil cup 4 is provided with internal threads, which are threadedly connected to the external threads of the oil cup mounting opening 23 to secure the oil cup 4 to the second filter 2.

[0049] In this embodiment, a submerged oil pipe 8 is disposed within the oil cup mounting opening 23. One end of the submerged oil pipe 8 is connected to the interior of the second filter 2, and the other end of the submerged oil pipe 8 is disposed below the transformer oil level within the oil cup 4. Submerged oil pipe 8 is used to direct airflow below the transformer oil within the oil cup 4, preventing the desiccant from prolonged direct contact with air, thereby extending the desiccant's lifespan.

[0050] In this embodiment, evenly distributed vent holes 24 are provided in the oil cup mounting opening 23 to allow gas to circulate while preventing the desiccant from entering the oil cup 4 .

[0051] like Figure 6 2 is a bottom view of the transformer respirator device of this embodiment. The figure shows the connection relationship between the oil cup mounting port 23, the submersible oil pipe 8 and the vent hole 24 of the transformer respirator device of this embodiment.

[0052] In this embodiment, a filter is provided on one side of the vent hole 24 / 33 to further prevent the desiccant from entering the transformer oil pipe or the oil cup 4.

[0053] During the specific implementation process, the connecting pipe 3 is fastened to the transformer oil pipe through the third connecting piece 31 set at the other end thereof using nuts, bolts and other parts; the first filter 1 and the second filter 2 are fastened to each other through the first connecting piece 11 and the second connecting piece 21 set at their openings using nuts, bolts and other parts; the oil cup 4 is threadedly connected to the external thread of the oil cup mounting port 23 through the internal thread set at its end, so that the oil cup 4 and the second filter 2 are installed and fixed, and the installation of the respirator device is completed.

[0054] During use, the respirator device is connected to the transformer oil pipe via the connecting pipe 3. When the oil temperature in the transformer oil pipe rises, the volume of the oil increases due to thermal expansion and contraction, increasing the air pressure in the transformer oil pipe. Under the action of the air pressure, the air in the transformer oil pipe enters the first filter 1 and the second filter 2 through the connecting pipe, and is then discharged into the atmosphere through the oil cup 4. When the oil temperature in the transformer oil pipe drops, the volume of the oil decreases, reducing the air pressure in the transformer oil pipe. The transformer draws in air through the respirator to achieve internal pressure equilibrium. The air passes through the transformer oil in the oil cup 4, filtering out dust and impurities in the air. The air is then dried by the desiccant filled in the first filter 1 and the second filter 2 before being drawn into the transformer oil pipe, thereby preventing humid air from directly entering the transformer oil pipe and preventing the transformer oil from becoming damp. When the desiccant filled in the first filter 1 and the second filter 2 needs to be replaced, the desiccant can be replaced by simply removing the first connector 11 and the second connector 21.

[0055] In this embodiment, the oil cup 4 is threadedly connected to the oil cup mounting opening 23 at the other end of the second filter 2, enabling removable attachment of the oil cup 4 to the second filter 2. When the transformer oil in the oil cup 4 needs to be replaced, the oil cup 4 can be rotated to disengage it from the oil cup mounting opening 23, allowing replacement of the oil cup 4. An additional submersible oil pipe 8 extends below the oil level in the oil cup 4 to create an oil seal, further preventing moisture from entering the first and second filters 1 and 2.

[0056] The same or similar reference numerals correspond to the same or similar components;

[0057] The terms used in the drawings to describe positional relationships are for illustrative purposes only and should not be construed as limiting this patent;

[0058] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A transformer respirator device, characterized in that: The filter housing of the filter is a first filter housing, and a second filter housing is a second filter housing. The filter housing is a first filter housing, and a filter is connected to the filter housing by a threaded connection. The filter housing has a first end and a second end. The filter housing has a first end and a second end. The filter housing has a first end and a second end.

2. The transformer respirator device according to claim 1, characterized in that: Observation windows are respectively provided on the outer surfaces of the first filter and the second filter.

3. The transformer respirator device according to claim 1, characterized in that: The desiccant includes but is not limited to silica gel particles.

4. The transformer respirator device according to claim 1, wherein: The other end of the connecting pipe is provided with a third connecting piece fixedly connected to the transformer oil pipe, and a groove is provided on the upper surface of the third connecting piece; the device also includes a sealing ring, and a sealing strip matching the groove is provided on the surface of the sealing ring; the outer diameter of the sealing ring is the same as the inner diameter of the transformer oil pipe.

5. The transformer respirator device according to claim 4, characterized in that: The connecting pipe is provided with evenly distributed vent holes.

6. The transformer respirator device according to claim 1, characterized in that: The oil cup mounting opening is provided with evenly distributed vent holes.

7. The transformer respirator device according to claim 5 or 6, characterized in that: A filter screen is provided on one side of the vent hole.

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