Transformer oil tank sealing structure

Abstract

The utility model discloses a transformer oil tank sealing structure, which relates to the technical field of transformer oil tank sealing and comprises an oil tank, an oil filling port unit, a sealing unit and an anti-backflow unit. An oil filling port unit is mounted at the upper end of the oil tank; the oil filling port unit comprises an oil filling pipe, a threaded sleeve, a rubber plug, a rubber pad and a threaded cover, the oil filling pipe is fixedly connected to the upper end of the oil tank, the threaded sleeve is fixedly connected to the right end of the outer side of the oil filling pipe, the threaded cover is fixedly connected to the outer side of the rubber plug, and the rubber pad is fixedly connected to the inner side of the threaded cover. The threaded cover is in threaded connection with the threaded sleeve; the sealing unit is mounted on the oil filling port unit; according to the transformer oil tank sealing structure, air and moisture can be effectively isolated, and meanwhile backflow of liquid is isolated under the condition that hot liquid expands.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer oil tank sealing, in particular to a transformer oil tank sealing structure. Background Technique

[0002] The sealing products used in transformers are mainly made of rubber, and rubber is vulnerable to aging to varying degrees under the influence of the use environment. Especially when rubber is exposed outside, the aging degree is relatively fast. The sealing of the transformer mainly aims to prevent the cooling oil in the transformer box from contacting the outside world, ensure that the cooling oil of the transformer does not deteriorate, and extend the service life of the cooling oil.

[0003] Among the existing technologies, a transformer oil tank sealing structure disclosed in the authorized publication number CN203631256U includes a box body and a cover plate matching with the box body. The sealing section of the cover plate and the box body is folded outwards to form a horizontal pressing section, then the horizontal pressing section is bent downwards to form a first vertical section, then the first vertical section is bent outwards to form an oil seal section, then the oil seal section is bent upwards to form a second vertical section, and then the second vertical section is bent outwards to form a waterproof section. There is a first large cavity in the first vertical section cavity, and a second large cavity in the second vertical section cavity; a rubber sealing ring and a metal pressure limiting ring are arranged in the horizontal pressing section cavity, and the oil seal section cavity is filled with a sealant.

[0004] In the existing technology, air and moisture cannot be effectively isolated, and at the same time, the reflux of the liquid cannot be effectively isolated when the hot liquid expands. Therefore, we propose a transformer oil tank sealing structure. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the existing defects, provide a transformer oil tank sealing structure, which can effectively isolate air and moisture, and at the same time isolate the reflux of the liquid when the hot liquid expands, and can effectively solve the problems in the background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a transformer oil tank sealing structure, including an oil tank, an oil filling port unit, a sealing unit and an anti-reflux unit;

[0007] Oil tank: An oil filling port unit is installed at the upper end;

[0008] Oil filling port unit: It includes an oil filling pipe, a threaded sleeve, a rubber plug, a rubber pad and a threaded cover. The upper end of the oil tank is fixedly connected with the oil filling pipe. The outer right end of the oil filling pipe is fixedly connected with the threaded sleeve. The outer side of the rubber plug is fixedly connected with the threaded cover. The inner side of the threaded cover is fixedly connected with the rubber pad. The threaded cover is threadedly connected with the threaded sleeve;

[0009] Sealing unit: Installed on the oil filling port unit;

[0010] Backflow prevention unit: Installed on the sealing unit.

[0011] Mineral oil is poured into the fuel tank through the injection pipe, and the rubber plug seals the injection port of the injection pipe through the threaded connection between the threaded cap and the threaded sleeve.

[0012] Furthermore, the sealing unit includes a frustum-shaped injection port, a frustum-shaped sealing rubber plug, a limiting strip and a U-shaped pipe. The lower end of the injection pipe is fixedly connected with a U-shaped pipe inside the fuel tank. The right end inside the U-shaped pipe is fixedly connected with a limiting strip. The lower end of the limiting strip inside the U-shaped pipe is fixedly connected with a frustum-shaped injection port. A frustum-shaped sealing rubber plug is slidably connected inside the U-shaped pipe.

[0013] Through the U-shaped pipe, after injecting mineral oil, a part of the mineral oil stays inside the U-shaped pipe to achieve the purpose of isolating air. The frustum-shaped sealing rubber plug is limited by the limiting strip, and the right end of the U-shaped pipe is sealed by the frustum-shaped injection port and the frustum-shaped sealing rubber plug.

[0014] Furthermore, the sealing unit also includes a fixed disk and a threaded rod. The upper end of the fixed disk is fixedly connected with a fixed disk. The middle part inside the fixed disk is rotatably connected with a threaded rod. The outside of the threaded rod is threadedly connected with the inside of the frustum-shaped sealing rubber plug.

[0015] The threaded rod is fixed by the fixed disk, and the frustum-shaped sealing rubber plug moves up and down through the threaded connection between the threaded rod and the frustum-shaped sealing rubber plug to achieve the sealing effect.

[0016] Furthermore, the sealing unit also includes a sector-shaped mounting block, a first strong magnet, a second strong magnet and a rotating ring. The upper end of the threaded rod is fixedly connected with a sector-shaped mounting block. The outside of the sector-shaped mounting block is fixedly connected with a first strong magnet. The lower end of the injection pipe is rotatably connected with a rotating ring. The outside of the rotating ring is fixedly connected with a second strong magnet.

[0017] By rotating the rotating ring to drive the second strong magnet to rotate, the second strong magnet and the first strong magnet drive the first strong magnet and the sector-shaped mounting block to rotate under the action of magnetic force, so as to achieve the purpose of driving the threaded rod to rotate.

[0018] Furthermore, the backflow prevention unit includes a Tesla valve, a mounting ring, a limiting post and a rubber sheet. The Tesla valve is fixedly connected to the lower end inside the U-shaped pipe. The left end inside the U-shaped pipe is fixedly connected with a mounting ring. Four limiting posts are fixedly connected to the upper end of the mounting ring. The inside of the rubber sheet is slidably connected with the limiting posts.

[0019] The oil return inside the fuel tank is prevented by a Tesla valve, the rubber sheet is limited by a limit post, the mineral oil flows into the fuel tank through a mounting ring, and the liquid return is prevented by the rubber sheet.

[0020] Furthermore, it also includes a connecting pipe. The left end of the U-shaped pipe is fixedly connected with a connecting pipe, and the horizontal position of the connecting pipe is lower than that of the oil injection pipe. The mineral oil is injected into the fuel tank through the connecting pipe.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows: The sealing structure of the transformer fuel tank of the present utility model has the following advantages:

[0022] 1. For the sealing structure of the transformer fuel tank of the present utility model, after the mineral oil is injected through the U-shaped pipe, a part of the mineral oil stays inside the U-shaped pipe to achieve the purpose of isolating air, and it can effectively isolate air and moisture.

[0023] 2. For the sealing structure of the transformer fuel tank of the present utility model, at the same time, the liquid return is isolated when the hot liquid expands. The threaded connection between the threaded rod and the conical sealing rubber plug enables the conical sealing rubber plug to move up and down to achieve the sealing effect, and the one-way valve structure of the Tesla valve prevents the oil inside the fuel tank from flowing back. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present utility model;

[0025] Figure 2 for the present utility model Figure 1 is a partially enlarged structural diagram at A in

[0026] Figure 3 is a partially sectional structural diagram of the present utility model;

[0027] Figure 4 for the present utility model Figure 3 is a partially enlarged structural diagram at B in

[0028] Figure 5 for the present utility model Figure 3 is a partially enlarged structural diagram at C in

[0029] In the figure: 1 fuel tank, 2 connecting pipe, 3 oil injection port unit, 31 oil injection pipe, 32 threaded sleeve, 33 rubber plug, 34 rubber gasket, 35 threaded cover, 4 sealing unit, 41 fixed disk, 42 threaded rod, 43 conical oil injection port, 44 conical sealing rubber plug, 45 limit strip, 46 sector mounting block, 47 strong magnet one, 48 strong magnet two, 49 rotating ring, 410 U-shaped pipe, 5 anti-backflow unit, 51 Tesla valve, 52 mounting ring, 53 limit post, 54 rubber sheet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0031] Please refer to Figures 1-5 , this embodiment provides a technical solution for a sealing structure of a transformer oil tank: A sealing structure of a transformer oil tank includes an oil tank 1, an oil filling port unit 3, a sealing unit 4, and an anti-backflow unit 5;

[0032] Oil tank 1: An oil filling port unit 3 is installed at the upper end;

[0033] Oil filling port unit 3: It includes an oil filling pipe 31, a threaded sleeve 32, a rubber plug 33, a rubber pad 34, and a threaded cap 35. The oil filling pipe 31 is fixedly connected to the upper end of the oil tank 1. The right end of the outer side of the oil filling pipe 31 is fixedly connected to the threaded sleeve 32. The outer side of the rubber plug 33 is fixedly connected to the threaded cap 35. The inner side of the threaded cap 35 is fixedly connected to the rubber pad 34. The threaded cap 35 is threadedly connected to the threaded sleeve 32;

[0034] Sealing unit 4: It is installed on the oil filling port unit 3;

[0035] Anti-backflow unit 5: It is installed on the sealing unit 4.

[0036] Mineral oil is poured into the oil tank through the oil filling pipe 31, and the rubber plug 33 seals the oil filling port of the oil filling pipe 31 through the threaded connection between the threaded cap 35 and the threaded sleeve 32.

[0037] The sealing unit 4 includes a frustum-shaped oil filling port 43, a frustum-shaped sealing rubber plug 44, a limiting strip 45, and a U-shaped pipe 410. The U-shaped pipe 410 is fixedly connected to the inner side of the oil tank 1 at the lower end of the oil filling pipe 31. The right end of the inner side of the U-shaped pipe 410 is fixedly connected to the limiting strip 45. The lower end of the limiting strip 45 on the inner side of the U-shaped pipe 410 is fixedly connected to the frustum-shaped oil filling port 43. The frustum-shaped sealing rubber plug 44 is slidably connected to the inner side of the U-shaped pipe 410.

[0038] Through the U-shaped pipe 410, after injecting mineral oil, a part of the mineral oil stays inside the U-shaped pipe 410 to achieve the purpose of isolating air. The frustum-shaped sealing rubber plug 44 is limited by the limiting strip 45. The right end of the U-shaped pipe 410 is sealed by the frustum-shaped oil filling port 43 and the frustum-shaped sealing rubber plug 44.

[0039] The sealing unit 4 further includes a fixed disk 41 and a threaded rod 42. The upper end of the fixed disk 410 is fixedly connected to the fixed disk 41. The middle part of the inner side of the fixed disk 41 is rotatably connected to the threaded rod 42. The outer side of the threaded rod 42 is threadedly connected to the inner side of the frustum-shaped sealing rubber plug 44.

[0040] The threaded rod 42 is fixed by the fixed disk 41. The threaded connection between the threaded rod 42 and the frustum-shaped sealing rubber plug 44 enables the frustum-shaped sealing rubber plug 44 to move up and down, achieving the sealing effect.

[0041] The sealing unit 4 further includes a sector-shaped mounting block 46, a first strong magnet 47, a second strong magnet 48, and a rotating ring 49. The upper end of the threaded rod 42 is fixedly connected to the sector-shaped mounting block 46. The outer side of the sector-shaped mounting block 46 is fixedly connected to the first strong magnet 47. The lower end of the oil injection pipe 31 is rotatably connected to the rotating ring 49. The outer side of the rotating ring 49 is fixedly connected to the second strong magnet 48.

[0042] By rotating the rotating ring 49 to drive the second strong magnet 48 to rotate, the second strong magnet 48 and the first strong magnet 47 drive the first strong magnet 47 and the sector-shaped mounting block 46 to rotate under the action of magnetic force, thereby achieving the purpose of driving the threaded rod 42 to rotate.

[0043] The anti-backflow unit 5 includes a Tesla valve 51, a mounting ring 52, a limiting post 53, and a rubber sheet 54. The Tesla valve 51 is fixedly connected to the lower end of the inner side of the U-shaped pipe 410. The mounting ring 52 is fixedly connected to the left inner side of the U-shaped pipe 410. Four limiting posts 53 are fixedly connected to the upper end of the mounting ring 52. The inner side of the rubber sheet 54 is slidably connected to the limiting posts 53.

[0044] The Tesla valve 51 prevents the oil in the fuel tank from flowing back. The rubber sheet 54 is limited by the limiting posts 53. Mineral oil flows into the fuel tank through the mounting ring 52, and the rubber sheet 54 prevents the liquid from flowing back.

[0045] It further includes a connecting pipe 2. The left end of the U-shaped pipe 410 is fixedly connected to the connecting pipe 2. The horizontal position of the connecting pipe 2 is lower than the horizontal position of the oil injection pipe 31. Mineral oil is injected into the fuel tank 1 through the connecting pipe 2.

[0046] The working principle of a transformer oil tank sealing structure provided by the present utility model is as follows: Mineral oil is poured into the interior of the oil tank through the oil injection pipe 31. The rubber plug 33 seals the oil injection port of the oil injection pipe 31 through the threaded connection between the threaded cover 35 and the threaded sleeve 32. Through the U-shaped pipe 410, after the mineral oil is injected, a part of the mineral oil stays inside the U-shaped pipe 410 to achieve the purpose of isolating air. The frustum-shaped sealing rubber plug 44 is limited by the limiting strip 45. The right end of the U-shaped pipe 410 is sealed by the frustum-shaped oil injection port 43 and the frustum-shaped sealing rubber plug 44. The threaded rod 42 is fixed by the fixing plate 41. The frustum-shaped sealing rubber plug 44 moves up and down through the threaded connection between the threaded rod 42 and the frustum-shaped sealing rubber plug 44 to achieve the sealing effect. By rotating the rotating ring 49, the second strong magnet 48 is driven to rotate. Under the action of magnetic force, the second strong magnet 48 drives the first strong magnet 47 and the sector-shaped mounting block 46 to rotate, so as to drive the threaded rod 42 to rotate. The Tesla valve 51 prevents the oil inside the oil tank from flowing back. The rubber sheet 54 is limited by the limiting column 53. The mineral oil flows into the oil tank through the mounting ring 52. The rubber sheet 54 prevents the liquid from flowing back. The mineral oil is injected into the interior of the oil tank 1 through the connecting pipe 2.

[0047] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A transformer oil tank sealing structure, characterized in that: It includes a fuel tank (1), a fuel filling port unit (3), a sealing unit (4), and a backflow prevention unit (5); Fuel tank (1): The fuel filling port unit (3) is installed at the upper end; Fuel filling port unit (3): It includes a fuel filling pipe (31), a threaded sleeve (32), a rubber plug (33), a rubber gasket (34), and a threaded cap (35). The fuel filling pipe (31) is fixedly connected to the upper end of the fuel tank (1). The right end of the outer side of the fuel filling pipe (31) is fixedly connected to the threaded sleeve (32). The outer side of the rubber plug (33) is fixedly connected to the threaded cap (35). The inner side of the threaded cap (35) is fixedly connected to the rubber gasket (34). The threaded cap (35) is threadedly connected to the threaded sleeve (32); Sealing unit (4): It is installed on the fuel filling port unit (3); Backflow prevention unit (5): It is installed on the sealing unit (4).

2. The sealed structure of a transformer oil tank according to claim 1, wherein: The sealing unit (4) includes a frustum-shaped fuel filling port (43), a frustum-shaped sealing rubber plug (44), a limiting strip (45), and a U-shaped pipe (410). The U-shaped pipe (410) is fixedly connected to the inner side of the fuel tank (1) at the lower end of the fuel filling pipe (31). The right end of the inner side of the U-shaped pipe (410) is fixedly connected to the limiting strip (45). The lower end of the limiting strip (45) on the inner side of the U-shaped pipe (410) is fixedly connected to the frustum-shaped fuel filling port (43). A frustum-shaped sealing rubber plug (44) is slidably connected to the inner side of the U-shaped pipe (410).

3. The sealed structure of a transformer oil tank according to claim 2, characterized in that: The sealing unit (4) further includes a fixed disk (41) and a threaded rod (42). The upper end of the fixed disk (41) is fixedly connected to the fixed disk (41). The middle part of the inner side of the fixed disk (41) is rotatably connected to the threaded rod (42). The outer side of the threaded rod (42) is threadedly connected to the inner side of the frustum-shaped sealing rubber plug (44).

4. A transformer oil tank sealing structure according to claim 3, characterized in that: The sealing unit (4) further includes a sector-shaped mounting block (46), a first strong magnet (47), a second strong magnet (48), and a rotating ring (49). The upper end of the threaded rod (42) is fixedly connected to the sector-shaped mounting block (46). The outer side of the sector-shaped mounting block (46) is fixedly connected to the first strong magnet (47). The lower end of the fuel filling pipe (31) is rotatably connected to the rotating ring (49). The outer side of the rotating ring (49) is fixedly connected to the second strong magnet (48).

5. A transformer oil tank sealing structure according to claim 4, characterized in that: The backflow prevention unit (5) includes a Tesla valve (51), a mounting ring (52), a limiting post (53), and a rubber sheet (54). The Tesla valve (51) is fixedly connected to the lower end of the inner side of the U-shaped pipe (410). The mounting ring (52) is fixedly connected to the left end inner side of the U-shaped pipe (410). Four limiting posts (53) are fixedly connected to the upper end of the mounting ring (52). The inner side of the rubber sheet (54) is slidably connected to the limiting posts (53).

6. The sealed structure of a transformer oil tank according to claim 3, characterized in that: It further includes a connecting pipe (2). The left end of the U-shaped pipe (410) is fixedly connected to the connecting pipe (2). The horizontal position of the connecting pipe (2) is lower than the horizontal position of the fuel filling pipe (31).

Images