Oil tank sealing structure of oil-immersed transformer

Abstract

The utility model relates to the technical field of transformers, in particular to an oil tank sealing structure of an oil-immersed transformer, which is simple in structure, improves the sealing performance among a sealing ring, an oil tank cover and a transformer main body, reduces the probability of leakage, and increases the space for installing screws and nuts by arranging a baffle plate to be rotatable. Comprising an oil-immersed transformer body, a sealing ring and a box cover, and the oil-immersed transformer body, the sealing ring and the box cover are connected through a plurality of screws and nuts; an expansion ring is connected to the inner wall of the sealing ring, and baffles are rotationally connected to the four edges of the top of the oil-immersed transformer body; the locking piece is used for locking the baffle plate; the bottom of the box cover is fixedly connected with a check ring. The outer wall of the check ring makes contact with the expansion ring.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to an oil tank sealing structure of an oil-immersed transformer. Background Art

[0002] Transformers are usually divided into dry type and immersed type. Dry type transformers are mainly used indoors below 110kv and in places with high fire protection and safety requirements. The dry cooling method relies too much on fans. When the fan loses power supply, the dry type transformer stops running. Oil immersed transformers are mainly used in conventional outdoor, high voltage, ultra-high voltage and other fields. Since oil immersed transformers use oil as the insulating medium, and oil has good insulation and low price, oil immersed transformers are most widely used in the transformer field.

[0003] A sealing ring is often provided between the oil tank cover and the transformer body to ensure good sealing. The sealing ring in the prior art cannot ensure seamless fit between the sealing ring, the oil tank cover and the transformer body, which is prone to leakage. In order to reduce the radiation of sunlight to the sealing ring, downwardly bent baffles are often provided around the oil tank cover. This arrangement brings inconvenience to the installation of screws and nuts. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an oil-immersed transformer oil tank sealing structure, which has a simple structure, improves the sealing between the sealing ring, the oil tank cover and the transformer body, reduces the probability of leakage, and sets the baffle to be rotatable, thereby increasing the space for installing screws and nuts.

[0005] The utility model discloses an oil-immersed transformer oil tank sealing structure, comprising an oil-immersed transformer body, a sealing ring and a tank cover, wherein the oil-immersed transformer body, the sealing ring and the tank cover are connected by a plurality of screws and nuts; an expansion ring is connected to the inner wall of the sealing ring, and baffles are rotatably connected to the four edges of the top of the oil-immersed transformer body;

[0006] Also included is a locking member for locking the baffle;

[0007] A retaining ring is fixedly connected to the bottom of the box cover, and the outer wall of the retaining ring is in contact with the expansion ring.

[0008] Furthermore, the top of the expansion ring is connected to a plurality of inflation nozzles, and the box cover is provided with through holes for the inflation nozzles to pass through.

[0009] Furthermore, a bracket is fixed to the main body of the oil-immersed transformer, the bracket is rotatably connected to a rotating shaft, the rotating shaft is fixedly connected to a connecting block, and the connecting block is connected to the baffle.

[0010] Furthermore, the locking member comprises a fixing block fixedly connected to the bracket, the fixing block is provided with a placement hole, and a positioning ball is elastically and slidably connected in the placement hole;

[0011] The locking piece also includes a positioning groove one which is arranged on the rotating shaft, and one end of the positioning ball is closely attached to the inner wall of the positioning groove one.

[0012] Furthermore, the locking member also includes a second positioning groove formed on the rotating shaft.

[0013] Furthermore, the fixing block is fixedly connected to the support plate, a spring is installed in the placement hole, and two ends of the spring are respectively in contact with the support plate and the positioning ball.

[0014] Furthermore, the inflation nozzle is equipped with a filling ring.

[0015] Furthermore, a groove is provided on the top of the baffle.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the main body of the oil-immersed transformer, the sealing ring and the box cover are connected by a plurality of screws and nuts. Before installing the box cover, the groove of the baffle is buckled to rotate the baffle until the positioning ball is in the second positioning groove and stops. At this time, the baffle is perpendicular to the main body of the oil-immersed transformer, which makes it more convenient to install the box cover, screws and nuts. Then, the sealing ring, the box cover, the nuts and nuts are installed, and the screws and nuts are tightened.

[0017] After installing the screws and nuts, hold the groove of the baffle and rotate it until the positioning ball stops in the positioning groove. The baffle will cover the sealing ring to prevent aging.

[0018] The oil-immersed transformer body, sealing ring and box cover are connected by multiple screws and nuts. After the three are installed, the retaining ring contacts the inner side of the expansion ring, which prevents the expansion ring from expanding toward the middle of the oil-immersed transformer body. Then air is inflated into the expansion ring to expand the expansion ring. After expansion, the expansion ring deforms in the upward and downward directions, filling the gap between the box cover and the oil-immersed transformer body, thereby improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 yes Figure 1 A partial enlarged view of the middle A part;

[0021] Figure 3 yes Figure 1 Schematic diagram of the structure behind the hidden box cover;

[0022] Figure 4 yes Figure 3 A partial enlarged view of part B in the middle;

[0023] Figure 5 It is a schematic diagram of the structure of the baffle, locking member, etc.;

[0024] Figure 6 It is a schematic diagram of the structure of the bracket, rotating shaft, connecting block, fixing block, etc.;

[0025] Markings in the attached figure: 1. Oil-immersed transformer body; 2. Sealing ring; 3. Box cover; 4. Expansion ring; 5. Baffle; 6. Retaining ring; 7. Inflating nozzle; 8. Bracket; 9. Rotating shaft; 10. Connecting block; 11. Fixing block; 12. Placement hole; 13. Positioning ball; 14. Positioning groove one; 15. Positioning groove two; 16. Support plate; 17. Spring; 18. Filling ring; 19. Groove. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] like Figures 1 to 6 As shown, the oil-immersed transformer oil tank sealing structure of the utility model comprises an oil-immersed transformer body 1, a sealing ring 2 and a box cover 3, wherein the oil-immersed transformer body 1, the sealing ring 2 and the box cover 3 are connected by a plurality of screws and nuts; an expansion ring 4 is connected to the inner wall of the sealing ring 2, and baffles 5 are rotatably connected to the four edges of the top of the oil-immersed transformer body 1;

[0028] Also includes a locking member for locking the baffle 5;

[0029] A retaining ring 6 is fixedly connected to the bottom of the box cover 3, and the outer wall of the retaining ring 6 is in contact with the expansion ring 4;

[0030] In this embodiment, the oil-immersed transformer body 1, the sealing ring 2 and the box cover 3 are connected by a plurality of screws and nuts. After the three are installed, the retaining ring 6 contacts the inner side of the expansion ring 4, which prevents the expansion ring 4 from expanding toward the middle of the oil-immersed transformer body 1. Then, air is inflated into the expansion ring 4 to expand the expansion ring 4. The expanded expansion ring 4 is deformed in the upward and downward directions to fill the gap between the box cover 3 and the oil-immersed transformer body 1, thereby improving the sealing effect. After the box cover 3 is installed on the oil-immersed transformer body 1 and before the screws and nuts are installed, the baffle 5 is rotated to cover the end of the sealing ring 2, and the position of the baffle 5 is locked by the locking member. The baffle 5 can completely cover the sealing ring 2 and does not hinder the operator from installing the nuts and screws.

[0031] Furthermore, the top of the expansion ring 4 is connected to a plurality of inflation nozzles 7, and the box cover 3 is provided with through holes for the inflation nozzles 7 to pass through;

[0032] In this embodiment, the expansion ring 4 is inflated through the inflation nozzle 7 .

[0033] Furthermore, the oil-immersed transformer body 1 is fixed with a bracket 8, the bracket 8 is rotatably connected with a rotating shaft 9, the rotating shaft 9 is fixedly connected with a connecting block 10, and the connecting block 10 is connected to the baffle 5;

[0034] In this embodiment, when the baffle 5 rotates, it drives the fixing block 11 and the rotating shaft 9 to rotate around the axis of the rotating shaft 9 .

[0035] Furthermore, the locking member comprises a fixing block 11 fixedly connected to the bracket 8, the fixing block 11 defines a placement hole 12, and a positioning ball 13 is elastically and slidably connected in the placement hole 12;

[0036] The locking member also includes a positioning groove 14 formed on the rotating shaft 9, and one end of the positioning ball 13 is pressed against the inner wall of the positioning groove 14;

[0037] In this embodiment, if Figure 6 As shown, under the action of elastic force, one end of the positioning ball 13 is pressed against the inner wall of the positioning groove 14, and at this time, the baffle 5 completely covers the sealing ring 2, which plays a role in positioning the baffle 5. When the baffle 5 needs to be rotated, the baffle 5 is grasped by hand and rotated. Under the action of external force, the positioning ball 13 slides relative to the fixed block 11, and the relative position of the positioning ball 13 and the positioning groove 14 changes, which will not hinder the rotation of the baffle 5. When the positioning ball 13 moves to the positioning groove 14 again, under the action of elastic force, the positioning ball 13 moves into the positioning groove 14 again, so that the position of the baffle 5 is fixed.

[0038] Furthermore, the locking member further includes a second positioning groove 15 formed on the rotating shaft 9;

[0039] In this embodiment, the center points of the second positioning groove 15 and the first positioning groove 14 are 90° apart. When the box cover 3 is installed, the baffle 5 is rotated until the positioning ball 13 contacts the inner wall of the second positioning groove 15 and stops. The position of the baffle 5 is fixed. At this time, the baffle 5 is perpendicular to the oil-immersed transformer body 1, which makes it easier to install the box cover 3, screws and nuts.

[0040] Furthermore, the fixing block 11 is fixedly connected to the support plate 16, a spring 17 is installed in the placement hole 12, and two ends of the spring 17 are in contact with the support plate 16 and the positioning ball 13 respectively;

[0041] In this embodiment, elastic force is provided to the positioning ball 13 by the support plate 16 and the spring 17 .

[0042] Furthermore, the inflation nozzle 7 is provided with a filling ring 18;

[0043] In this embodiment, the filling ring 18 is made of rubber. After the box cover 3 is installed, the outer wall of the filling ring 18 contacts the inner wall of the through hole, which plays a role in improving the sealing performance.

[0044] Furthermore, a groove 19 is formed on the top of the baffle 5;

[0045] In this embodiment, when the baffle plate 5 needs to be rotated, the groove 19 is held by hand to rotate the baffle plate 5, so that the baffle plate 5 can be more conveniently subjected to force, thereby improving the convenience of use.

[0046] The utility model discloses an oil-immersed transformer oil tank sealing structure. When the oil-immersed transformer body 1, the sealing ring 2 and the box cover 3 are connected by a plurality of screws and nuts. Before installing the box cover 3, the groove 19 of the baffle 5 is buckled to rotate the baffle 5 until the positioning ball 13 is in the positioning groove 15 and stops. At this time, the baffle 5 is perpendicular to the oil-immersed transformer body 1, which makes it more convenient to install the box cover 3, screws and nuts. Then, the sealing ring 2, the box cover 3 and the nuts and nuts are installed, and the screws and nuts are tightened.

[0047] After installing the screws and nuts, buckle the groove 19 of the baffle 5 to rotate the baffle 5 until the positioning ball 13 stops in the positioning groove 14. The baffle 5 covers the sealing ring 2 to prevent aging.

[0048] The oil-immersed transformer body 1, the sealing ring 2 and the box cover 3 are connected by multiple screws and nuts. After the three are installed, the retaining ring 6 contacts the inner side of the expansion ring 4 to prevent the expansion ring 4 from expanding toward the middle of the oil-immersed transformer body 1. Then, air is inflated into the expansion ring 4 to expand the expansion ring 4. The expanded expansion ring 4 is deformed in the upward and downward directions to fill the gap between the box cover 3 and the oil-immersed transformer body 1, thereby improving the sealing effect.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An oil-immersed transformer oil tank sealing structure, comprising an oil-immersed transformer body (1), a sealing ring (2) and a tank cover (3), wherein the oil-immersed transformer body (1), the sealing ring (2) and the tank cover (3) are connected by a plurality of screws and nuts; characterized in that: The inner wall of the sealing ring (2) is connected to an expansion ring (4), and the four edges of the top of the oil-immersed transformer body (1) are rotatably connected to baffles (5); Also included is a locking member for locking the baffle (5); A retaining ring (6) is fixedly connected to the bottom of the box cover (3), and an outer wall of the retaining ring (6) is in contact with the expansion ring (4).

2. The oil tank sealing structure of the oil-immersed transformer according to claim 1, characterized in that: The top of the expansion ring (4) is connected to a plurality of inflation nozzles (7), and the box cover (3) is provided with through holes for the inflation nozzles to pass through.

3. The oil tank sealing structure of the oil-immersed transformer according to claim 2, characterized in that: A bracket (8) is fixed to the main body (1) of the oil-immersed transformer. The bracket (8) is rotatably connected to a rotating shaft (9). The rotating shaft (9) is fixedly connected to a connecting block (10). The connecting block (10) is connected to the baffle (5).

4. The oil tank sealing structure of the oil-immersed transformer according to claim 3, characterized in that: The locking member comprises a fixing block (11) fixedly connected to the bracket (8), the fixing block (11) being provided with a placement hole (12), and a positioning ball (13) being elastically slidably connected in the placement hole (12); The locking member also includes a positioning groove (14) formed on the rotating shaft (9), and one end of the positioning ball (13) is closely attached to the inner wall of the positioning groove (14).

5. The oil tank sealing structure of the oil-immersed transformer according to claim 4, characterized in that: The locking member also includes a second positioning groove (15) formed on the rotating shaft (9).

6. The oil tank sealing structure of the oil-immersed transformer according to claim 5, characterized in that: The fixing block (11) is fixedly connected to the support plate (16), and a spring (17) is installed in the placement hole (12), and two ends of the spring (17) are respectively in contact with the support plate (16) and the positioning ball (13).

7. The oil tank sealing structure of the oil-immersed transformer according to claim 6, characterized in that: The inflation nozzle (7) is equipped with a filling ring (18).

8. The oil tank sealing structure of the oil-immersed transformer according to claim 7, characterized in that: The baffle (5) has a groove (19) on the top.

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