A transformer with filtering function

Abstract

The application discloses a transformer with a filtering function and belongs to the field of transformers. The device is provided with a driving rod which is arranged in a filtering pipe in a sliding mode, the filtering pipe is partially arranged as a rectangular pipe, and a slidable pushing block and a pushing ring are arranged in the rectangular pipe. When impurities in the filtering pipe are accumulated and push the driving rod to overcome the spring displacement, a control assembly first closes the filtering pipe, separates the rectangular pipe into independent areas, and then the pushing block drives the pushing ring to move, so that the oil liquid containing impurities which is intercepted by the filter element is discharged. After the impurities are completely discharged, the pushing ring is returned to the original position to close the communication groove, automatic closing after the discharge is realized, meanwhile, the surface pressure of the driving rod is reduced, the driving spring pushes the driving rod to reset, the whole sealing is completed by the adhesion of the pushing ring and the pipe wall, the risk of spring jamming failure is avoided, the oil liquid leakage and air intrusion are avoided, the oil sludge on the inner wall can be scraped off when the pushing ring slides, the large flow discharge path is not easy to be blocked, and the long-term stable operation of the filtering system is further ensured.

Description

Technical Field

[0001] This invention relates to the field of transformers, and in particular to a transformer with a filtering function. Background Technology

[0002] As a core hub device in the power transmission and distribution system, the transformer oil inside the oil-immersed transformer plays a crucial role in insulation protection and heat dissipation. During long-term operation, the vibration and wear of the transformer core and windings will generate metal debris. Solid insulating materials such as insulating paper and insulating boards will gradually age and fall off under high-temperature electric field conditions, forming fibrous impurities. These impurities suspended in the oil will significantly reduce the oil's insulation strength and affect the stable operation of the transformer.

[0003] Currently, some transformers have a pipe structure with a filter element on the side to filter impurities. For example, a filter transformer proposed in the patent titled "Filter Transformer" (patent publication number: CN221304417U) has a pressure relief structure inside the oil filter assembly that can automatically operate according to changes in oil pressure. When impurities accumulate and block the filter element, the increased internal oil pressure pushes the inner core downward, automatically opening the oil drain hole to discharge the deposited oil-containing impurities. After the impurities are discharged, the oil pressure drops, and the spring pushes the inner core to reset and re-close the oil drain passage. This achieves automatic discharge of impurities without the need for frequent manual disassembly of the filter element, which reduces the maintenance cost of transformer oil filtration to a certain extent.

[0004] However, it relies on spring reset to close the drain hole. When impurities get stuck on the sealing surface or the spring fails due to fatigue after long-term use, it is prone to incomplete closure, causing continuous leakage of oil from the main oil circuit. It may also cause the oil to become damp and oxidize due to the intrusion of external air. It relies solely on the flow of the oil itself to carry away deposited impurities. High-viscosity sludge impurities are very easy to adhere to the drain passage and cannot be completely carried out. After long-term accumulation, they will completely block the drain channel, eventually leading to the complete failure of the filtration function.

[0005] In summary, when existing technologies use pipes with filter elements to discharge deposited impurities through spring-supported pressure relief devices, it is difficult to ensure a closed state, and impurities easily adhere to the oil drain passage, which may cause continuous oil leakage or blockage of the passage. Summary of the Invention

[0006] This invention provides a transformer with a filtration function, which can solve the problems in the prior art where, when a pipe with a filter element discharges deposited impurities through a spring-supported pressure relief device, it is difficult to ensure a closed state, and impurities easily adhere to the oil drain passage, which may cause continuous oil leakage or blockage of the passage.

[0007] A transformer with a filtering function includes a transformer housing and a plurality of filter tubes. Each filter tube has two bends on its surface. The filter tubes are fixedly mounted on the surface of the transformer housing. Each filter tube has a detachable filter element inside. A discharge mechanism is provided between the filter tubes and the transformer housing. The discharge mechanism includes: A closed column is fixedly installed at the end of the filter tube. An active rod is slidably connected inside the closed column. An active spring is fixedly connected between the active rod and the closed column. The filter tube includes a rectangular tube with a communicating groove on its surface. A control component for opening and closing the filter tube is provided between the active rod and the filter tube. Several pushing blocks and several pushing rings are slidably disposed inside the communicating groove, and the pushing blocks and pushing rings are fixed and spaced apart.

[0008] Optionally, the end of the filter tube furthest from the active rod is threaded with a closing post, and the closing post is threadedly connected to the filter element.

[0009] Optionally, the surface of the closed column is provided with a disassembly groove, and the end of the filter element is fixedly connected to a disassembly shaft. The disassembly shaft is adapted to the disassembly groove, the vertical cross-section of the disassembly shaft is T-shaped, and the horizontal cross-section of the disassembly groove is L-shaped.

[0010] Optionally, the control component includes a recessed ring fixedly disposed inside the filter tube, the projection of the active rod toward the closed column covering the recessed ring, a pressure sensor fixedly disposed inside the recessed ring, and two ball valves fixedly disposed inside the filter tube, the end edges of the ball valves coinciding with the edge of the rectangular tube; a rotating component for realizing the rotation of the ball valves is disposed between the ball valves and the pressure sensor.

[0011] Optionally, the pressure sensor is a thin-film pressure sensor.

[0012] Optionally, the ball valve end extends through and to the surface of the filter tube, the rotating assembly includes a rotating gear fixedly disposed at the end of the ball valve, a rotating rod is slidably connected inside the transformer housing, and a plurality of driving teeth are fixedly connected to the surface of the rotating rod, the driving teeth meshing with the rotating gear; the plurality of driving teeth are divided into two groups, and the number of teeth of the rotating gear is four times the number of driving teeth in a single group.

[0013] Optionally, an electric telescopic rod and a controller are fixedly connected to the surface of the transformer housing; the end of the piston rod inside the electric telescopic rod is fixedly connected to the rotating rod; the output end of the pressure sensor is electrically connected to the input end of the controller; the input end of the electric telescopic rod is electrically connected to the output end of the controller; and a connecting block is fixedly connected between the rotating rod and the pushing block.

[0014] Optionally, the rotating rod has several oblique grooves on its surface, and adjacent oblique grooves are symmetrically arranged relative to a single set of driving teeth. A limit block is slidably connected to the surface of the transformer housing, and two limit teeth are fixedly connected to the surface of the limit block. The limit teeth mesh with the rotating gear.

[0015] Optionally, a sliding shaft is fixedly connected to the surface of the limiting block. The cross-section of the sliding shaft is T-shaped. A sliding groove is provided on the surface of the rotating rod. The sliding shaft is adapted to the sliding groove, and the sliding groove is connected to the inclined groove.

[0016] Optionally, a locking shaft is fixedly connected inside the communicating groove, and a locking groove is opened on the surface of the pushing ring, with the locking shaft and the locking groove being adapted to each other.

[0017] Compared with the prior art, the beneficial effects of the present invention are: The system includes a sliding active rod inside the filter tube, with one section of the filter tube being a rectangular tube. A sliding push block and push ring are installed within the rectangular tube. When impurities accumulate inside the filter tube, they push the active rod against the force of the active spring. At this point, the control component can close the filter tube, thus isolating the rectangular tube into an independent area and preventing further oil flow. The push block and push ring can then slide within the rectangle. This sliding motion causes internal impurities to move, discharging the oil containing impurities trapped by the filter element. After the impurities are discharged, the push ring moves to re-close the connecting groove. The system automatically closes after sewage discharge, and the active rod resets under the action of the active spring. Impurities in the filter tube are discharged through the cooperation of the active rod and the push ring, ensuring a stable seal. Impurities are pushed out by the push ring, which moves to fit against the filter tube to achieve a seal, guaranteeing the filter tube's sealing condition and preventing continuous oil leakage and air intrusion. Simultaneously, the push ring slides along the inner wall of the connecting groove during opening and closing, scraping away sludge and impurities adhering to the inner wall of the connecting groove at any time. The large discharge path area prevents long-term accumulation of sludge that clogs the sewage discharge passage, ensuring long-term stable operation of the filtration function. A locking shaft is installed inside the connecting channel to limit the sliding length of the push ring, which facilitates the overall pushing of deposited impurities by the push ring, avoids local residue of impurities during the pushing process, and ensures that the stuck sludge can be fully pushed out with each sewage discharge, thus ensuring the long-term unobstructed flow of the connecting channel. At the same time, it can limit the push ring after reset, ensuring that the push ring is accurately aligned with the connecting channel after reset, and maintaining the sealing effect. Attached Figure Description

[0018] Figure 1 A schematic diagram of a transformer structure with filtering function provided by the present invention; Figure 2 A three-dimensional view of the push block provided by the present invention; Figure 3A three-dimensional structural cross-sectional view of the disassembly groove provided by the present invention; Figure 4 An exploded three-dimensional view of the impurity discharge mechanism provided by the present invention; Figure 5 A three-dimensional view of the inclined groove provided by the present invention; Figure 6 Provided by the present invention Figure 5 Enlarged view of the local structure at point A in the middle. Explanation of reference numerals in the attached figures: 1. Filter tube; 2. Filter element; 31. Driving rod; 32. Driving spring; 33. Connecting groove; 34. Push block; 35. Push ring; 41. Closing column; 42. Disassembly groove; 43. Disassembly shaft; 51. Inset ring; 52. Pressure sensor; 53. Ball valve; 54. Rotating gear; 55. Rotating rod; 56. Drive gear; 57. Electric telescopic rod; 58. Angled groove; 59. Limiting block; 510. Sliding shaft; 61. Snap-fit ​​shaft; 62. Snap-fit ​​groove. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0020] like Figures 1 to 6 As shown in the figure, an embodiment of the present invention provides a transformer with a filtering function, including a transformer housing and a plurality of filter tubes 1. Each filter tube 1 has two bends on its surface. The plurality of filter tubes 1 are fixedly disposed on the surface of the transformer housing. Each filter tube 1 has a detachable filter element 2 inside. A discharge mechanism is provided between the filter tubes 1 and the transformer housing. The discharge mechanism includes: A closed column is fixedly installed at the end of the filter tube 1. An active rod 31 is slidably connected inside the closed column. An active spring 32 is fixedly connected between the active rod 31 and the closed column. The filter tube 1 includes a rectangular tube located at the bend of the filter tube 1 away from the filter element 2. A connecting groove 33 is opened on the surface of the rectangular tube. A control component is provided between the active rod 31 and the filter tube 1. The control component is used to realize the opening and closing of the filter tube 1. A plurality of pushing blocks 34 and a plurality of pushing rings 35 are slidably disposed on the surface of the transformer housing. The pushing blocks 34 and the pushing rings 35 are fixed and spaced apart. The pushing rings 35 are slidably disposed inside the communicating groove 33. In summary, the present invention provides a transformer with a filtering function, including an active rod 31 slidably disposed inside a filter tube 1. One section of the filter tube 1 is configured as a rectangular tube, and a sliding push block 34 and a push ring 35 are disposed within the rectangular tube. When impurities accumulate inside the filter tube 1, the impurities will push the active rod 31 to move against the elastic force of the active spring 32. At this time, the filter tube 1 can be controlled to close by a control component, thereby separating the rectangular tube into an independent area to prevent oil from continuing to flow in the rectangular tube. At this time, the push block 34 and the push ring 35 can slide within the rectangle. The sliding of the rectangular tube causes the internal impurities to move, discharging the oil containing impurities trapped by the filter element 2. After the impurities are discharged, the push block 34 and the push ring 35 slide within the rectangle. The movement of ring 35 causes the connecting groove 33 to re-close, achieving automatic closure after sewage discharge, and the active rod 31 is reset under the action of the active spring 32; the discharge of impurities in the filter tube 1 is completed by the cooperation of the active rod 31 and the push ring 35, and the sealing state is stable. Impurities are pushed out by the push ring 35. The movement of the push ring 35 and its contact with the filter tube 1 can achieve sealing, ensuring the sealing state of the filter tube 1 and preventing continuous leakage of oil and air intrusion into the oil; at the same time, the push ring 35 slides along the inner wall of the connecting groove 33 during the opening and closing process, which can scrape off the sludge and impurities adhering to the inner wall of the connecting groove 33 at any time. At the same time, the discharge path area is large, which can prevent the long-term accumulation of sludge from clogging the sewage discharge passage and ensure the long-term stable operation of the filtration function; In some specific implementations, the end of the filter tube 1 away from the active rod 31 is threadedly connected to a closing post 41, and the closing post 41 is threadedly connected to the filter element 2; The surface of the closed column 41 is provided with a disassembly groove 42, and the end of the filter element 2 is fixedly connected with a disassembly shaft 43. The disassembly shaft 43 is adapted to the disassembly groove 42. The vertical cross-section of the disassembly shaft 43 is T-shaped, and the horizontal cross-section of the disassembly groove 42 is L-shaped. The disassembly groove 42 on the surface of the closing column 41 allows the filter element 2 to slide into a specific position. After the filter element 2 rotates, the position of the filter element 2 relative to the closing column 41 is restricted, which facilitates the disassembly and replacement of the filter element 2 and ensures the position of the filter element 2 during use. The maintenance and replacement of the filter element 2 can be completed without completely removing the filter tube 1, which reduces the difficulty of maintenance operations. In some specific implementations, the control component includes an inner ring 51 fixedly disposed inside the filter tube 1, the projection of the active rod 31 toward the closed column covering the inner ring 51, a pressure sensor 52 fixedly disposed inside the inner ring 51, and two ball valves 53 fixedly disposed inside the filter tube 1, the end edges of the ball valves 53 coinciding with the edge of the rectangular tube; a rotating assembly is disposed between the ball valves 53 and the pressure sensor 52, the rotating assembly being used to rotate the ball valves 53, and the rotating assembly being slidably disposed inside the transformer housing; The pressure sensor 52 is a thin-film pressure sensor 52; The ball valve 53 extends through and to the surface of the filter tube 1. The rotating assembly includes a rotating gear 54 fixedly disposed at the end of the ball valve 53. A rotating rod 55 is slidably connected inside the transformer housing. A plurality of driving teeth 56 are fixedly connected to the surface of the rotating rod 55. The driving teeth 56 mesh with the rotating gear 54. The plurality of driving teeth 56 are divided into two groups. The number of teeth of the rotating gear 54 is four times the number of driving teeth 56 in a single group. An electric telescopic rod 57 and a controller (not shown in the figure) are fixedly connected to the surface of the transformer housing. The piston rod end inside the electric telescopic rod 57 is fixedly connected to the rotating rod 55. The output end of the pressure sensor 52 is electrically connected to the input end of the controller (not shown in the figure), and the input end of the electric telescopic rod 57 is electrically connected to the output end of the controller (not shown in the figure). It should be noted that the pressure sensor 52, the electric telescopic rod 57, and the controller (not shown in the figure) are all electrically connected to an external power source. The pressure sensor 52, the electric telescopic rod 57, and the controller (not shown in the figure) are all conventional components in the relevant technical field, and those skilled in the art can select them according to actual needs. The rotating rod 55 has several oblique grooves 58 on its surface. Adjacent oblique grooves 58 are symmetrically arranged relative to a single set of driving teeth 56. A limit block 59 is slidably connected to the surface of the transformer housing. Two limit teeth are fixedly connected to the surface of the limit block 59. The limit teeth mesh with the rotating gear 54. The limit block 59 is slidably arranged inside the oblique groove 58. The limiting block 59 is fixedly connected to a sliding shaft 510. The sliding shaft 510 has a T-shaped cross-section. The rotating rod 55 has a sliding groove on its surface. The sliding shaft 510 is adapted to the sliding groove. The sliding groove is connected to the inclined groove 58. A connecting block is fixedly connected between the rotating rod 55 and the pushing block 34; The ball valve 53 controls the flow path of the oil inside the filter tube 1, and the rotation of the ball valve 53 is associated with the sliding of the rotating rod 55. The sliding of the rotating rod 55 is then associated with the sliding of the push block 34. This allows the push ring 35 to push impurities and the internal passage of the filter tube 1 to open and close, thus achieving action linkage. When the pressure sensor 52 detects pressure on the surface, the controller (not shown in the figure) can transmit a signal, which can trigger the ball valve 53 of the corresponding filter tube 1 to close. At the same time, the push ring 35 is driven to complete the scraping and discharge of impurities. The sewage discharge process can be completed automatically without manual operation. During the sewage discharge process, the impurity deposition area is in an independent and sealed state to prevent continuous oil loss and ensure the stable operation of the entire filtration and sewage discharge process. In some specific implementations, a locking shaft 61 is fixedly connected inside the connecting groove 33, and a locking groove 62 is formed on the surface of the pushing ring 35, wherein the locking shaft 61 is adapted to the locking groove 62; A retaining shaft 61 is set inside the connecting groove 33 to limit the sliding length of the pushing ring 35, thereby facilitating the overall pushing of deposited impurities by the pushing ring 35, avoiding local residue of impurities during the pushing process, ensuring that the stuck sludge can be fully pushed out each time the sewage is discharged, and ensuring that the connecting groove 33 is unobstructed for a long time; at the same time, it can limit the pushing ring 35 after reset, ensuring that the pushing ring 35 is accurately aligned with the connecting groove 33 after reset, maintaining a good sealing effect, and avoiding oil leakage due to poor sealing; Working principle of the invention: After the transformer has been in use for a period of time, when impurities accumulate inside the filter tube 1, they push the active rod 31 into contact with the pressure sensor 52 on the surface of the recessed ring 51. The pressure sensor 52 detects the pressure signal and transmits it to the controller. The controller then controls the electric telescopic rod 57 to extend. The piston rod of the electric telescopic rod 57 drives the rotating rod 55 to slide to one side. The driving teeth 56 on the rotating rod 55 mesh with the rotating gear 54 at the end of the ball valve 53, causing the rotating gear 54 to rotate 90 degrees, so that both ball valves 53 rotate to the closed state, closing the filter tubes 1 at both ends of the rectangular tube. The passage is closed. At the same time, the rotating rod 55 drives the pushing block 34 and the pushing ring 35 to slide outward along the connecting groove 33 through the connecting block, pushing out the oil containing impurities deposited in the rectangular tube as a whole, completing the impurity discharge operation. After the electric telescopic rod 57 pushes the pushing ring 35 out of the connecting groove 33, it pulls the pushing block 34 and the rotating rod 55 to move in the opposite direction, so that the pushing ring 35, the rotating rod 55 and the ball valve 53 are all reset. At this time, the surface pressure of the active rod 31 decreases, and the active spring 32 drives the active rod 31 to reset and disengage from the pressure sensor 52, completing an automatic impurity discharge process.

[0021] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A transformer with a filtering function, comprising a transformer housing and a plurality of filter tubes (1), wherein the surface of each filter tube (1) has two bends, the plurality of filter tubes (1) are fixedly disposed on the surface of the transformer housing, and each filter tube (1) is detachably provided with a filter element (2), characterized in that, A bleed-out mechanism is provided between the filter tube (1) and the transformer housing, the bleed-out mechanism comprising: A closed column is fixedly installed at the end of the filter tube (1). An active rod (31) is slidably connected inside the closed column. An active spring (32) is fixedly connected between the active rod (31) and the closed column. The filter tube (1) includes a rectangular tube. A connecting groove (33) is opened on the surface of the rectangular tube. A control component for opening and closing the filter tube (1) is provided between the active rod (31) and the filter tube (1). A plurality of push blocks (34) and a plurality of push rings (35) are slidably disposed inside the connecting groove (33), wherein the push blocks (34) and push rings (35) are fixed and spaced apart.

2. A transformer with a filtering function as described in claim 1, characterized in that, The filter tube (1) has a closed post (41) threadedly connected to the end away from the active rod (31), and the closed post (41) is threadedly connected to the filter element (2).

3. A transformer with a filtering function as described in claim 2, characterized in that, The surface of the closed column (41) is provided with a disassembly groove (42), and the end of the filter element (2) is fixedly connected with a disassembly shaft (43). The disassembly shaft (43) is adapted to the disassembly groove (42). The vertical cross-section of the disassembly shaft (43) is T-shaped, and the horizontal cross-section of the disassembly groove (42) is L-shaped.

4. A transformer with a filtering function as described in claim 1, characterized in that, The control assembly includes an inner ring (51) fixedly installed inside the filter tube (1), the projection of the active rod (31) toward the closed column covers the inner ring (51), a pressure sensor (52) is fixedly installed inside the inner ring (51), and two ball valves (53) are fixedly installed inside the filter tube (1), the end edge of the ball valve (53) coincides with the edge of the rectangular tube; a rotating assembly for realizing the rotation of the ball valve (53) is provided between the ball valve (53) and the pressure sensor (52).

5. A transformer with a filtering function as described in claim 4, characterized in that, The pressure sensor (52) is a thin-film pressure sensor.

6. A transformer with a filtering function as described in claim 4, characterized in that, The ball valve (53) extends through and to the surface of the filter tube (1) at its end. The rotating assembly includes a rotating gear (54) fixedly disposed at the end of the ball valve (53). A rotating rod (55) is slidably connected inside the transformer housing. Several driving teeth (56) are fixedly connected to the surface of the rotating rod (55). The driving teeth (56) mesh with the rotating gear (54). The driving teeth (56) are divided into two groups. The number of teeth of the rotating gear (54) is four times the number of teeth in a single group of driving teeth (56).

7. A transformer with a filtering function as described in claim 6, characterized in that, An electric telescopic rod (57) and a controller are fixedly connected to the surface of the transformer housing. The piston rod end inside the electric telescopic rod (57) is fixedly connected to the rotating rod (55). The output end of the pressure sensor (52) is electrically connected to the input end of the controller. The input end of the electric telescopic rod (57) is electrically connected to the output end of the controller. A connecting block is fixedly connected between the rotating rod (55) and the push block (34).

8. A transformer with a filtering function as described in claim 6, characterized in that, The rotating rod (55) has several oblique grooves (58) on its surface. Adjacent oblique grooves (58) are symmetrically arranged relative to a single set of driving teeth (56). A limit block (59) is slidably connected to the surface of the transformer housing. Two limit teeth are fixedly connected to the surface of the limit block (59). The limit teeth mesh with the rotating gear (54).

9. A transformer with a filtering function as described in claim 8, characterized in that, The limiting block (59) has a sliding shaft (510) fixedly connected to its surface. The sliding shaft (510) has a T-shaped cross-section. The rotating rod (55) has a sliding groove on its surface. The sliding shaft (510) is adapted to the sliding groove. The sliding groove is connected to the inclined groove (58).

10. A transformer with a filtering function as described in claim 1, characterized in that, The connecting groove (33) is fixedly connected to a locking shaft (61), and the surface of the pushing ring (35) is provided with a locking groove (62). The locking shaft (61) is adapted to the locking groove (62).

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