Oil-immersed power transformer

Abstract

The utility model discloses an oil-immersed power transformer which comprises an oil conservator, a breather pipe is fixedly connected to the oil conservator, a fixing table is fixedly connected to the breather pipe, a limiting groove is formed in the fixing table, a through hole is formed in the limiting groove, an exhalation device is detachably installed on the fixing table, and the exhalation device is fixedly connected to the oil conservator. A connecting pipe is integrally formed on the exhalator, the connecting pipe penetrates through the through hole in the limiting groove, a plugging assembly is fixedly connected into the connecting pipe, the plugging assembly is used for plugging the through hole in the limiting groove and comprises a connecting block, the connecting block is fixedly connected to the inner wall of the breather pipe, and the connecting block is fixedly connected to the outer wall of the breather pipe. A positioning ring is integrally formed at the end, away from the ventilation pipe, of the connecting block. Compared with the prior art, the oil-immersed power transformer has the advantages that when the exhalator is detached, the breather pipe can be blocked, the insulating property of transformer oil can be effectively guaranteed, and the probability of faults such as winding burnout and turn-to-turn short circuit is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil-immersed power transformers, and particularly relates to an oil-immersed power transformer. Background Art

[0002] Oil-immersed power transformers play a crucial role in the power system. Their main functions include voltage conversion, current conversion, impedance conversion, isolation, and voltage stabilization, etc., and they are an indispensable part of the power system.

[0003] Currently, in order to replenish transformer oil for the oil-immersed power transformer, an oil conservator is installed on the transformer, and a breather is installed on the oil conservator. The main function of the breather is to remove and dry the sundries and moisture in the air entering the oil conservator to protect the transformer oil from getting damp, so as to ensure the insulation strength of the transformer oil.

[0004] In actual use, it is necessary to remove the breather for cleaning and replacing the filter element. After the breather is removed, the transformer oil in the oil conservator is in direct contact with the air. In the humid plum rain season in the south, the moisture in the air will accelerate the cracking of the insulating oil after entering the oil conservator, resulting in a decrease in the insulation of the transformer oil. Once the insulation performance of the transformer oil drops to a certain extent, faults such as winding burnout and inter-turn short circuit may occur.

[0005] Therefore, in view of the above technical problems, it is necessary to provide an oil-immersed power transformer.

[0006] The information disclosed in this background art section is only intended to enhance the overall understanding of the present utility model and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide an oil-immersed power transformer, which can be used to solve the above problems.

[0008] To achieve the above purpose, a specific embodiment of the present utility model provides an oil-immersed power transformer, including a transformer housing and an oil conservator. A ventilation pipe is fixedly connected to the oil conservator. The oil-immersed power transformer further includes:

[0009] A fixed platform, which is fixedly connected to the ventilation pipe. A limiting groove is opened on the fixed platform, and a through hole is opened on the bottom wall of the limiting groove;

[0010] An exhauster, which is detachably installed on the fixed platform. A connecting pipe is integrally formed on the exhauster, and the connecting pipe penetrates through the through hole on the limiting groove;

[0011] A plugging component, which is used to plug the through hole on the limiting groove.

[0012] In one or more embodiments of the present utility model, the plugging component includes a connecting block, the connecting block is fixedly connected to the inner wall of the ventilation pipe, a positioning ring is integrally formed at one end of the connecting block away from the ventilation pipe, a locking column is slidably connected to the positioning ring, the locking column penetrates through the positioning ring, and a first rubber block is fixedly connected to one end face of the locking column close to the fixed platform.

[0013] In one or more embodiments of the present utility model, a second rubber block is fixedly connected to one end face of the first rubber block away from the locking column, and the second rubber block is matched with the through hole.

[0014] In one or more embodiments of the present utility model, a locking cap is integrally formed at one end face of the locking column away from the first rubber block, a spring is fixedly connected to the locking cap, and one end of the spring away from the locking cap is fixedly connected to the positioning ring.

[0015] In one or more embodiments of the present utility model, a plurality of air outlet holes are formed in the connecting pipe.

[0016] In one or more embodiments of the present utility model, a bearing is fixedly connected to one end of the connecting pipe away from the exhaler.

[0017] In one or more embodiments of the present utility model, a through groove is formed in the fixed platform, the through groove is L-shaped, and a clamping block matched with the through groove is fixedly connected to the exhaler.

[0018] In one or more embodiments of the present utility model, a clamping groove is formed in the groove wall of the through groove, and the clamping groove is matched with the clamping block.

[0019] In one or more embodiments of the present utility model, a load-bearing plate is fixedly connected to the transformer housing, there are a pair of load-bearing plates, an insertion plate is fixedly connected to the ventilation pipe, and the insertion plate is clamped between the pair of load-bearing plates.

[0020] In one or more embodiments of the present utility model, an opening matched with the ventilation pipe is formed in the load-bearing plate.

[0021] Compared with the prior art, for an oil-immersed power transformer of the present utility model, when the exhaler is removed, the ventilation pipe can be plugged, which can effectively guarantee the insulation performance of the transformer oil and reduce the probability of faults such as winding burnout and inter-turn short circuit. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 Structural schematic diagram of an oil-immersed power transformer in an embodiment of the present invention;

[0024] Figure 2 For Figure 1 Structural schematic diagram at position A in

[0025] Figure 3 Structural schematic diagram of a breather of an oil-immersed power transformer in an embodiment of the present invention Figure 1 ;

[0026] Figure 4 Structural schematic diagram of a breather of an oil-immersed power transformer in an embodiment of the present invention Figure 2 ;

[0027] Figure 5 Partial sectional structural schematic diagram of a breather of an oil-immersed power transformer in an embodiment of the present invention Figure 1 ;

[0028] Figure 6 Partial sectional structural schematic diagram of a breather of an oil-immersed power transformer in an embodiment of the present invention Figure 2 ;

[0029] Figure 7 For Figure 6 Structural schematic diagram at position B in

[0030] Figure 8 Partial sectional structural schematic diagram of a breather of an oil-immersed power transformer in an embodiment of the present invention Figure 3 。

[0031] Main reference numeral description:

[0032] 1. Transformer housing; 11. Load-bearing plate; 111. Opening; 2. Conservator; 21. Vent pipe; 211. Plug board; 22. Connecting block; 23. Positioning ring; 3. Exhaler; 31. Clamping block; 32. Connecting pipe; 321. Air outlet hole; 33. Bearing; 4. Fixed platform; 41. Through groove; 411. Card slot; 42. Limiting groove; 43. Through hole; 5. Lock nut; 51. Lock post; 511. First rubber block; 512. Second rubber block; 52. Spring. Detailed implementation manners

[0033] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] As Figure 1 shown, an oil-immersed power transformer in an embodiment of the present utility model includes a transformer housing 1, an oil conservator 2 is installed on the transformer housing 1, a breather pipe 21 is welded on the oil conservator 2, and an exhauster 3 is detachably installed at one end of the breather pipe 21 away from the oil conservator 2.

[0035] Specifically, the oil conservator 2 is filled with transformer oil, which can continuously supplement the inside of the transformer housing 1 when the oil level inside the transformer housing 1 drops. The exhauster 3 can filter the moisture in the air and protect the transformer oil in the oil conservator 2.

[0036] When the oil-immersed power transformer is working normally, it is necessary to regularly remove the exhauster 3 for cleaning and replace the filter element inside the exhauster 3. In order to facilitate the disassembly and installation of the exhauster 3, as Figures 1 to 7 shown, a fixing platform 4 is welded at the lower end of the breather pipe 21. A limiting groove 42 is opened on the upper panel of the fixing platform 4, and a through hole 43 is opened on the bottom wall of the limiting groove 42. A connecting pipe 32 is integrally formed on the exhauster 3, and the connecting pipe 32 passes through the through hole 43 and is inserted into the through hole 43. A through groove 41 is opened on the side wall of the fixing platform 4. The through groove 41 is L-shaped. A clamping block 31 is integrally formed on the exhauster 3 and is matched with the through groove 41. A clamping groove 411 is opened on the groove wall of the through groove 41 and is matched with the clamping block 31.

[0037] When installing the exhauster 3, hold the exhauster 3 and place the exhauster 3 into the fixing platform 4. At this time, the connecting pipe 32 will naturally align with the through hole 43. Align the clamping block 31 with the through groove 41 and lift the exhauster 3 upward. At this time, the clamping block 31 slides in the vertical part of the through groove 41. When the clamping block 31 enters the horizontal part of the through groove 41, rotate the exhauster 3. When the clamping block 31 contacts the right side wall of the through groove 41, pull the exhauster 3 downward, and the clamping block 31 can be clamped in the clamping groove 411, so that the exhauster 3 can be stably installed on the fixing platform 4, realizing the installation of the exhauster 3.

[0038] It should be noted that when the exhauster 3 is removed for cleaning and replacing the filter element, moisture will enter the oil conservator 2 from the breather pipe 21, causing pollution and damage to the transformer oil in the oil conservator 2.

[0039] In order to be able to block the ventilation pipe 21 when the exhaler 3 is disassembled, as Figures 5 to 8 shown, a blocking component is installed inside the ventilation pipe 21. The blocking component includes a connecting block 22, and the connecting block 22 is welded to the inner wall of the ventilation pipe 21. One end of the connecting block 22 away from the ventilation pipe 21 is integrally formed with a positioning ring 23. A locking column 51 is slidably connected to the positioning ring 23. The locking column 51 penetrates through the positioning ring 23. One end surface of the locking column 51 close to the fixed platform 4 is fixedly connected with a first rubber block 511.

[0040] Specifically, when the exhaler 3 is removed from the fixed platform 4, the locking column 51 slides downward under the action of gravity. After the first rubber block 511 lands on the limiting groove 42, it can block the through hole 43 and prevent moisture from entering. The limiting groove 42 limits the first rubber block 511 to prevent the locking column 51 from falling off from the ventilation pipe 21.

[0041] Furthermore, a second rubber block 512 is bonded to one end surface of the first rubber block 511 away from the locking column 51, and the second rubber block 512 is matched with the through hole 43. When the first rubber block 511 lands on the limiting groove 42, the second rubber block 512 is inserted into the through hole 43, playing a role in enhancing the sealing effect.

[0042] It should be noted that one end of the connecting pipe 32 away from the exhaler 3 has a slope. When the connecting pipe abuts against the second rubber block 512, the gas flowing out of the connecting pipe 32 will not be blocked by the second rubber block 512.

[0043] Furthermore, as shown in FIGS. 4 to Figure 7 shown, a lock cap 5 is integrally formed on one end surface of the locking column 51 away from the first rubber block 511. A spring 52 is welded to the lower end surface of the lock cap 5. One end of the spring 52 away from the lock cap 5 is welded to the positioning ring 23. Specifically, when the exhaler 3 is disassembled, under the action of the elastic contraction force of the spring 52, the first rubber block 511 can fit more tightly on the limiting groove 42 to prevent moisture from flowing into the through hole 43. When the exhaler 3 is installed, the locking column 51 slides upward in the positioning ring 23, and the spring 52 is stretched. After the clamping block 31 is clamped in the clamping groove 411, the contraction force of the spring 52 can make the clamping block 31 firmly clamped in the clamping groove 411 to prevent the clamping block 31 from falling off from the clamping groove 411.

[0044] In order to make the ventilation of the connecting pipe 32 smoother, as Figures 5 to 7 shown, a plurality of air outlet holes 321 are provided on the connecting pipe 32. After the exhaler 3 is installed on the fixed platform 4, the connecting pipe 32 penetrates through the through hole 43 and is inserted into the ventilation pipe 21. The air filtered by the exhaler 3 flows out from the air outlet holes 321, enhancing the ventilation effect of the connecting pipe 32.

[0045] Further, one end of the connecting pipe 32 away from the expirator 3 is fixedly connected with a bearing 33. Specifically, the bearing 33 is in contact with the second rubber block 512. When the expirator 3 is rotated, the bearing 33 rotates, which can make it more labor-saving and prevent the second rubber block 512 and the connecting pipe 32 from being damaged after multiple frictions.

[0046] As Figure 1 and Figure 2 shown, a pair of load-bearing plates 11 are welded on the side wall of the transformer housing 1. An insertion plate 211 is integrally formed on the ventilation pipe 21. The insertion plate 211 is clamped between a pair of load-bearing plates 11 in an interference fit manner. The load-bearing plate 11 below the insertion plate 211 supports the insertion plate 211 to prevent cracks from appearing at the connection between the ventilation pipe 21 and the oil conservator 2 due to the influence of gravity. Moreover, when disassembling and installing the expirator 3, it is necessary to lift the expirator 3 upward. The load-bearing plate 11 above the insertion plate 211 can limit the upward force when lifting the expirator 3 and prevent the ventilation pipe 21 from being bent due to force.

[0047] Further, an opening 111 matching the ventilation pipe 21 is formed on the load-bearing plate 11. The ventilation pipe 21 is also clamped in the opening 111, which can increase the contact area between the insertion plate 211 and the load-bearing plate 11.

[0048] During use, when the expirator 3 needs to be cleaned, first hold the expirator 3 and push it upward to make the clamping block 31 disengage from the card slot 411, and then rotate the expirator 3. When the clamping block 31 abuts against the vertical wall of the through slot 41, the expirator 3 can be removed from the fixing platform 4. At this time, the spring 52 elastically contracts, the first rubber block 511 can fall on the limit slot 42, and the second rubber block 512 will also insert into the through hole 43 to realize the blocking of the through hole

[0049] 43.

[0050] After cleaning, put the expirator 3 into the fixing platform 4. At this time, the connecting pipe 32 will naturally align with the through hole 43. Rotate the expirator 3. When the clamping block 31 aligns with the vertical part of the through slot 41, push the expirator 3 upward. The clamping block 31 can slide into the horizontal part of the through slot 41, and then rotate the expirator 3 to make the clamping block 31 clamped in the card slot 411.

[0051] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0052] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An oil-immersed power transformer, comprising a transformer housing and an oil conservator, wherein a vent pipe is fixedly connected to the oil conservator, and is characterized in that, Further included are: A fixed platform, which is fixedly connected to the ventilation pipe. A limit groove is formed on the fixed platform, and a through hole is formed on the bottom wall of the limit groove; An exhaler, which is detachably installed on the fixed platform. A connecting pipe is integrally formed on the exhaler, and the connecting pipe penetrates through the through hole on the limit groove; A plugging assembly, which is used to plug the through hole on the limit groove.

2. The oil-immersed power transformer according to claim 1, characterized in that, The plugging assembly includes a connecting block, which is fixedly connected to the inner wall of the ventilation pipe. A positioning ring is integrally formed at one end of the connecting block away from the ventilation pipe. A locking column is slidably connected to the positioning ring. The locking column penetrates through the positioning ring, and a first rubber block is fixedly connected to the end surface of the locking column close to the fixed platform.

3. An oil-immersed power transformer according to claim 2, characterized in that, A second rubber block is fixedly connected to the end surface of the first rubber block away from the locking column, and the second rubber block is matched with the through hole.

4. An oil-immersed power transformer according to claim 2, characterized in that, A lock cap is integrally formed on the end surface of the locking column away from the first rubber block, and a spring is fixedly connected to the lock cap. The end of the spring away from the lock cap is fixedly connected to the positioning ring.

5. An oil-immersed power transformer according to claim 1, characterized in that, A plurality of air outlet holes are formed on the connecting pipe.

6. An oil-immersed power transformer according to claim 5, characterized in that, A bearing is fixedly connected to the end of the connecting pipe away from the exhaler.

7. An oil-immersed power transformer according to claim 1, characterized in that, A through groove is formed on the fixed platform, and the through groove is L-shaped. A clamping block matched with the through groove is fixedly connected to the exhaler.

8. An oil-immersed power transformer according to claim 7, characterized in that, A clamping groove is formed on the wall of the through groove, and the clamping groove is matched with the clamping block.

9. An oil-immersed power transformer according to any one of claims 1-8, characterized in that, A load-bearing plate is fixedly connected to the transformer housing, and there are a pair of load-bearing plates. An insertion plate is fixedly connected to the ventilation pipe, and the insertion plate is clamped between the pair of load-bearing plates.

10. The oil-immersed power transformer according to claim 9, characterized in that, An opening matched with the ventilation pipe is formed on the load-bearing plate.

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