An inlet filter structure of a main transformer oil pump

Abstract

This utility model relates to an inlet filter structure for a main transformer oil pump, belonging to the technical field of main transformer oil pumps. It includes an oil pump, with a filter assembly fixedly installed at the oil pump's suction port. An oil pipe is connected to the left side of the filter assembly, and a power assembly is fixedly installed at the bottom of the filter assembly. A drain pipe is connected to the bottom of the filter assembly. In this inlet filter structure, a motor drives a rotating shaft and a first bevel gear to rotate. The first bevel gear meshes with and drives a second bevel gear, a first rotating shaft, and a third bevel gear to rotate synchronously. The third bevel gear meshes with and drives a fourth bevel gear, a second rotating shaft, and a scraper to rotate synchronously. This allows the scraper to continuously remove oil and impurities adhering to the filter screens on both sides. This design effectively prevents impurities from accumulating and clogging the filter screen opening through automatic cleaning of the filter screen, thus ensuring smooth oil pump suction. Automatic draining significantly improves draining efficiency and reduces maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of main transformer oil pump technology, specifically to an inlet filter structure for a main transformer oil pump. Background Technology

[0002] The main transformer oil pump is the core power component of the forced oil circulation cooling system. Its function is to drive the hot transformer oil to circulate continuously between the radiator and the transformer body, thereby achieving effective cooling of the transformer. To ensure the long-term stable operation of the oil pump and prevent its internal precision components from being worn or jammed due to the entry of impurities, a filter structure must be installed at the inlet of the oil pump. This inlet filter structure acts as a protective barrier, effectively intercepting solid particles such as metal debris, fibers, and carbides that may be present in the oil, purifying the oil entering the oil pump. It is a key link in ensuring the reliability of the entire cooling system and extending the service life of the main transformer.

[0003] However, after long-term operation, the filter screen of the existing main transformer oil pump will gradually be blocked by contaminants such as metal particles, carbides, and fibrous impurities that accumulate in the oil. This will increase the operating load of the oil pump, affect the cooling efficiency, and the internal space is usually extremely narrow, making manual cleaning time-consuming, labor-intensive, and extremely inconvenient. Therefore, an inlet filter structure for the main transformer oil pump is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an inlet filter structure for a main transformer oil pump, which has the advantages of automatic cleaning and drainage, and solves the problem that the inlet filter screen of the existing main transformer oil pump is prone to clogging after long-term use and is inconvenient to clean manually.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an inlet filter structure for a main transformer oil pump, comprising an oil pump, a filter assembly fixedly installed at the oil pump suction port, an oil pipe connected to the left side of the filter assembly, a power assembly fixedly installed at the bottom of the filter assembly, and a sewage pipe connected to the bottom of the filter assembly. The filter assembly includes a filter cylinder fixedly connected to the oil pump suction port. A fixing block is fixedly installed on the top of the filter cylinder, and a motor is fixedly installed on the top of the fixing block. A rotating shaft is fixedly installed at the output end of the motor. A first bevel gear is fixedly installed at the end of the rotating shaft away from the motor. A first rotating shaft is provided on the top of the filter cylinder. A second bevel gear is fixedly installed on the surface of the first rotating shaft, and a third bevel gear is fixedly installed at the bottom of the first rotating shaft. The first and second bevel gears mesh with each other. Two filter screens are fixedly installed on the inner wall of the filter cylinder. A second rotating shaft is rotatably installed on the outer wall of the filter screen on the right side. A fourth bevel gear is fixedly installed on the surface of the second rotating shaft. The third and fourth bevel gears mesh with each other. Four scraper blades are fixedly installed on the surface of the second rotating shaft.

[0006] Furthermore, two brackets are fixedly installed on the top of the filter cartridge, and sleeves are fixedly installed on opposite sides of the two brackets. The inner wall of the sleeves is rotatably connected to the outer wall of the first rotating shaft.

[0007] Furthermore, a groove is provided at the bottom of the filter cylinder, and two sliding covers are slidably installed on the inner wall of the groove. Springs are fixedly installed on the opposite side of the two sliding covers.

[0008] Furthermore, the power assembly includes a fixed frame that is fixedly connected to the bottom of the filter cartridge. An electric push rod is fixedly installed on the outer wall of the fixed frame. A push plate is fixedly installed at the output end of the electric push rod. The outer walls on both sides of the push plate are respectively in contact with the outer walls of the two sliding covers. The push plate is located below the spring.

[0009] Furthermore, the top of the filter cylinder has a hole, through which the first rotating shaft extends from the top of the filter cylinder to the interior. The second bevel gear is located above the filter cylinder, and the third bevel gear is located inside the filter cylinder.

[0010] Furthermore, sealing rings are provided at the top and bottom of the hole, and the inner walls of the two sealing rings are in contact with the outer wall of the first rotating shaft.

[0011] Furthermore, the filter screen on the left side has a slot inside, and the second rotating shaft extends through the slot to the left side of the filter screen. The fourth bevel gear is located between the two filter screens.

[0012] Furthermore, the two scraper strips on the left are attached to the outer wall of the left filter screen, and the two scraper strips on the right are attached to the outer wall of the right filter screen.

[0013] Furthermore, a protective box is fixedly installed on the top of the filter cartridge, and the motor, the first bevel gear, and the sleeve are all located inside the protective box.

[0014] Furthermore, two of the sliding covers are disposed above the sewage pipe, and four of the scrapers are disposed above the two sliding covers.

[0015] Compared with the prior art, this utility model provides an inlet filter structure for a main transformer oil pump, which has the following beneficial effects: 1. The inlet filter structure of the main transformer oil pump is characterized by a motor-driven rotating shaft and a first bevel gear. The first bevel gear meshes with the second bevel gear, the first rotating shaft, and the third bevel gear to rotate synchronously. The third bevel gear meshes with the fourth bevel gear, the second rotating shaft, and the scraper to rotate synchronously, allowing the scraper to continuously remove oil and impurities adhering to the filter screens on both sides. This design effectively prevents impurities from accumulating and clogging the filter screen openings by automatically cleaning the filter screens, thereby ensuring smooth oil suction of the oil pump.

[0016] 2. The inlet filter structure of the main transformer oil pump, under normal oil supply operation, the electric push rod starts and pushes the push plate to the highest point, overcoming the spring force to open the two sliding covers, so that the sliding covers block the inlet of the sewage pipe to prevent oil leakage. When sewage discharge is required, the electric push rod retracts and drives the push plate to descend, and the sliding covers return to their original position under the action of the spring, thereby opening the inlet of the sewage pipe to start sewage discharge. This design significantly improves sewage discharge efficiency and reduces maintenance costs through automatic sewage discharge, while avoiding the problem of oil flow interruption caused by filter screen blockage. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the internal structure of the filter cartridge of this utility model; Figure 2 This utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This utility model Figure 1 Enlarged view at point B in the middle; Figure 4 This is a perspective view of the connection structure between the filter screen, scraper, and the No. 2 rotating shaft of this utility model.

[0018] In the diagram: 1. Oil pump; 2. Filter assembly; 3. Oil pipe; 4. Filter cartridge; 5. Motor; 6. Bevel gear No. 1; 7. Shaft No. 1; 8. Bevel gear No. 2; 9. Bevel gear No. 3; 10. Filter screen; 11. Shaft No. 2; 12. Bevel gear No. 4; 13. Scraper blade; 14. Drain pipe; 15. Power assembly; 16. Sliding cover; 17. Spring; 18. Electric push rod; 19. Push plate; 20. Sealing ring; 21. Protective box. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1 to 4 The inlet filtration structure of a main transformer oil pump in this embodiment includes an oil pump 1, a filter assembly 2 fixedly installed at the oil suction port of the oil pump 1, an oil pipe 3 connected to the left side of the filter assembly 2, a power assembly 15 fixedly installed at the bottom of the filter assembly 2, and a sewage pipe 14 connected to the bottom of the filter assembly 2. Specifically, the filter assembly 2 includes a filter cylinder 4 fixedly connected to the oil inlet of the oil pump 1. A fixing block is fixedly installed on the top of the filter cylinder 4, and a motor 5 is fixedly installed on the top of the fixing block. A rotating shaft is fixedly installed at the output end of the motor 5. A first bevel gear 6 is fixedly installed at the end of the rotating shaft away from the motor 5. A first rotating shaft 7 is provided on the top of the filter cylinder 4. A second bevel gear 8 is fixedly installed on the surface of the first rotating shaft 7. A third bevel gear 9 is fixedly installed at the bottom of the first rotating shaft 7. The first bevel gear 6 and the second bevel gear 8 mesh with each other. Two filter screens 10 are fixedly installed on the inner wall of the filter cylinder 4. A second rotating shaft 11 is rotatably installed on the outer wall of the right filter screen 10. A fourth bevel gear 12 is fixedly installed on the surface of the second rotating shaft 11. The third bevel gear 9 and the fourth bevel gear 12 mesh with each other. Four scraper blades 13 are fixedly installed on the surface of the second rotating shaft 11.

[0021] Among them, the motor 5 drives the rotating shaft and the first bevel gear 6 to rotate. The meshing transmission between the first bevel gear 6 and the second bevel gear 8 drives the first rotating shaft 7 and the third bevel gear 9 to rotate synchronously. Then, the meshing of the third bevel gear 9 and the fourth bevel gear 12 drives the second rotating shaft 11 to rotate, so that the four scraper strips 13 fixed on the surface of the second rotating shaft 11 scrape and clean the surfaces of the two filter screens 10, effectively removing attached oil and impurities.

[0022] Please see Figure 2 In this embodiment, two brackets are fixedly installed on the top of the filter cylinder 4, and sleeves are fixedly installed on opposite sides of the two brackets. The inner wall of the sleeve is rotatably connected to the outer wall of the first rotating shaft 7.

[0023] Please see Figure 1 and Figure 3 In this embodiment, a groove is provided at the bottom of the filter cylinder 4, and two sliding covers 16 are slidably installed on the inner wall of the groove. A spring 17 is fixedly installed on the opposite side of the two sliding covers 16.

[0024] Please see Figure 1 and Figure 3 In this embodiment, the power assembly 15 includes a fixed frame that is fixedly connected to the bottom of the filter cartridge 4. An electric push rod 18 is fixedly installed on the outer wall of the fixed frame. A push plate 19 is fixedly installed at the output end of the electric push rod 18. The outer walls on both sides of the push plate 19 are respectively attached to the outer walls of the two sliding covers 16. The push plate 19 is located below the spring 17.

[0025] The electric push rod 18 drives the push plate 19 to move up and down through telescopic movement. When it is necessary to close the sewage pipe 14, the electric push rod 18 lifts the push plate 19, and the push plate 19 presses the two sliding covers 16 upward, causing the two sliding covers 16 to slide to both sides against the elastic force of the spring 17, thereby tightly closing the inlet of the sewage pipe 14. When it is necessary to discharge sewage, the electric push rod 18 retracts and drives the push plate 19 to descend, removing the pushing force on the sliding covers 16. Under the action of the restoring force of the spring 17, the sliding covers 16 return to the center, opening the inlet of the sewage pipe 14 and allowing impurities to be discharged.

[0026] Please see Figure 1 and Figure 2 In this embodiment, the top of the filter cylinder 4 is provided with a hole, the first rotating shaft 7 extends from the top of the filter cylinder 4 to the inside through the hole, the second bevel gear 8 is disposed above the filter cylinder 4, and the third bevel gear 9 is disposed inside the filter cylinder 4.

[0027] Specifically, sealing rings 20 are provided at the top and bottom of the hole, and the inner walls of the two sealing rings 20 are in contact with the outer wall of the first rotating shaft 7.

[0028] Among them, the sealing ring 20 prevents the oil inside the filter cylinder 4 from leaking through the hole through which the first rotating shaft 7 passes, thus ensuring the reliability of the system seal.

[0029] Please see Figure 1 and Figure 4 In this embodiment, the left filter screen 10 has a slot, the second rotating shaft 11 extends through the slot to the left side of the left filter screen 10, and the fourth bevel gear 12 is disposed between the two filter screens 10.

[0030] Specifically, the two scraper strips 13 on the left are attached to the outer wall of the left filter screen 10, and the two scraper strips 13 on the right are attached to the outer wall of the right filter screen 10.

[0031] Please see Figure 1 In this embodiment, a protective box 21 is fixedly installed on the top of the filter cartridge 4, and the motor 5, the first bevel gear 6 and the sleeve are all located inside the protective box 21.

[0032] Among them, the protection box 21 provides physical isolation and safety protection for transmission components such as motor 5, No. 1 bevel gear 6 and sleeve, effectively preventing external environmental interference and potential damage, and ensuring stable and reliable transmission process and safe operation.

[0033] Please see Figure 1 In this embodiment, two sliding covers 16 are disposed above the sewage pipe 14, and four scraper strips 13 are disposed above the two sliding covers 16.

[0034] The working principle of the above embodiments is as follows: When the filter screen 10 needs to be cleaned, the motor 5 drives the rotating shaft and the first bevel gear 6 to rotate. Through meshing, the second bevel gear 8, the first rotating shaft 7, and the third bevel gear 9 rotate synchronously. Then, the third bevel gear 9 meshes and drives the fourth bevel gear 12, the second rotating shaft 11, and the scraper 13 to rotate, so that the scraper 13 continuously scrapes off the oil and impurities attached to the surface of the filter screen 10 on both sides. Under normal oil conveying operation, the electric push rod 18 lifts the push plate 19 to the highest point, overcoming the elastic force of the spring 17 and causing the two sliding covers 16 to slide outward and close the inlet of the drain pipe 14 to prevent oil leakage. When it is necessary to drain, the electric push rod 18 retracts and drives the push plate 19 to descend. The sliding cover 16 is reset under the action of the spring 17 and opens the inlet of the drain pipe 14, and the impurities are discharged.

[0035] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.

[0036] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An inlet filter structure for a main transformer oil pump, comprising an oil pump (1), characterized in that: The oil pump (1) has a filter assembly (2) fixedly installed at its oil inlet. The filter assembly (2) is connected to an oil pipe (3) on its left side. The filter assembly (2) has a power assembly (15) fixedly installed at its bottom. The filter assembly (2) has a sewage pipe (14) connected to its bottom. The filter assembly (2) includes a filter cylinder (4) fixedly connected to the oil inlet of the oil pump (1). A fixing block is fixedly installed on the top of the filter cylinder (4), and a motor (5) is fixedly installed on the top of the fixing block. A rotating shaft is fixedly installed at the output end of the motor (5). A first bevel gear (6) is fixedly installed at the end of the rotating shaft away from the motor (5). A first rotating shaft (7) is provided on the top of the filter cylinder (4). A second bevel gear (8) is fixedly installed on the surface of the first rotating shaft (7). The bottom of the first rotating shaft (7) The filter cylinder (4) is fixedly installed with a No. 3 bevel gear (9), the No. 1 bevel gear (6) meshes with the No. 2 bevel gear (8), the inner wall of the filter cylinder (4) is fixedly installed with two filter screens (10), the outer wall of the filter screen (10) on the right side is rotatably installed with a No. 2 rotating shaft (11), the surface of the No. 2 rotating shaft (11) is fixedly installed with a No. 4 bevel gear (12), the No. 3 bevel gear (9) meshes with the No. 4 bevel gear (12), and the surface of the No. 2 rotating shaft (11) is fixedly installed with four scraper blades (13).

2. The inlet filter structure of a main transformer oil pump according to claim 1, characterized in that: The filter cylinder (4) has two brackets fixedly installed on its top. A sleeve is fixedly installed on the opposite side of the two brackets. The inner wall of the sleeve is rotatably connected to the outer wall of the first rotating shaft (7).

3. The inlet filter structure of a main transformer oil pump according to claim 1, characterized in that: The filter cylinder (4) has a groove at the bottom, and two sliding covers (16) are slidably installed on the inner wall of the groove. Springs (17) are fixedly installed on the opposite side of the two sliding covers (16).

4. The inlet filter structure of a main transformer oil pump according to claim 1, characterized in that: The power assembly (15) includes a fixed frame that is fixedly connected to the bottom of the filter cartridge (4). An electric push rod (18) is fixedly installed on the outer wall of the fixed frame. A push plate (19) is fixedly installed at the output end of the electric push rod (18). The outer walls on both sides of the push plate (19) are respectively in contact with the outer walls of the two sliding covers (16). The push plate (19) is located below the spring (17).

5. The inlet filter structure of a main transformer oil pump according to claim 1, characterized in that: The filter cylinder (4) has a hole at the top. The first rotating shaft (7) extends from the top of the filter cylinder (4) into the interior through the hole. The second bevel gear (8) is located above the filter cylinder (4). The third bevel gear (9) is located inside the filter cylinder (4).

6. The inlet filter structure of a main transformer oil pump according to claim 5, characterized in that: A sealing ring (20) is provided at the top and bottom of the hole, and the inner wall of the two sealing rings (20) is in contact with the outer wall of the first rotating shaft (7).

7. The inlet filter structure of a main transformer oil pump according to claim 1, characterized in that: The filter screen (10) on the left side has a slot, and the second rotating shaft (11) extends through the slot to the left side of the filter screen (10). The fourth bevel gear (12) is located between the two filter screens (10).

8. The inlet filter structure of a main transformer oil pump according to claim 1, characterized in that: The two scraper strips (13) on the left are attached to the outer wall of the left filter screen (10), and the two scraper strips (13) on the right are attached to the outer wall of the right filter screen (10).

9. The inlet filter structure of a main transformer oil pump according to claim 1, characterized in that: The filter cartridge (4) is fixedly provided with a protection box (21) at the top, the motor (5) and the first bevel gear (6) and the sleeve are arranged in the protection box (21).

10. The inlet filter structure of a main transformer oil pump according to claim 3, characterized in that: Two sliding covers (16) are arranged above the blowdown pipeline (14), and four scraping strips (13) are arranged above the two sliding covers (16).

Images