Transformer tap switch protection cover

Abstract

The invention discloses a transformer tap switch protection cover which comprises a transformer, a tap switch is arranged on the transformer, the tap switch is composed of a transmission rod in the center and a clamping groove in the outer side, a transverse rod is fixed to the upper end of the transmission rod, the transverse rod is connected with a shifting piece through a groove hole, the tap switch is connected with a base through threads, and an outer ring is fixed to the upper side of the base. A rotating assembly is rotatably connected in the outer ring, a rotating pipe is arranged on the side face of the rotating assembly, assisting blocks are evenly and rotatably connected to the outer side of the rotating pipe, a protective cover is connected to the outer edge of the lower side of the rotating assembly through threads, an annular groove is formed in the lower side of the base, a sealing gasket is clamped in the annular groove, and a linkage plate is rotatably connected to the inner side of the upper end of the rotating assembly; through the arrangement of the base and the protective cover which are separately connected, the bottom of the base is opened, the contact surface of the lower side is enlarged, the sealing performance between the fixing ring and the base is improved through the pressing plate, and the waterproof and dustproof effects are achieved through the silica gel cover in the shape of a round cap.

Description

Technical Field

[0001] The invention relates to the technical field of tap switch protection covers, in particular to a transformer tap switch protection cover. Background Art

[0002] There are few studies on transformer tap changer protection covers, mainly:

[0003] A "transformer tap changer protection device" (utility model patent, patent number: CN200620070674.X). The utility model relates to a transformer component, specifically a transformer tap changer protection device for protecting the transformer tap changer. The transformer tap changer protection device includes a switch cap that is screwed onto a switch knob, a jack is opened on the side wall of the switch cap, a holder is provided on the transformer box on one side of the switch cap, a slot is provided on the holder, a stop rod is provided between the holder and the switch cap, one end of the stop rod is inserted into the jack, and the other end of the stop rod is placed in the slot on the holder and is limited by a padlock.

[0004] "A sealing cover for a non-excitation tap changer of a capacity-adjusting transformer" (utility model patent, patent number: CN201220437656.6). The utility model discloses a sealing cover for a non-excitation tap changer of a capacity-adjusting transformer, including a cover body, a boss is provided at the lower end of the cover body, an internal thread is provided on the inner wall of the cover body, an external thread is provided on the outer wall of the boss, and the cover body is connected to the boss by spiral fitting through the internal thread of the cover body and the external thread of the boss. The cover body of the utility model is screwed on the boss, replacing the sealing cover of the transformer gasket that is prone to aging in the past.

[0005] The shortcomings of the above prior art are:

[0006] (1) The main function of the "transformer tap changer protection device" is to limit the movement of the tap changer to ensure that it is in a stable and reliable position and state. It mainly plays a limit role and does not have dust and water protection functions.

[0007] (2) Although the “sealing cover for an off-excitation tap changer of a capacity-regulating transformer” can seal the tap changer body, it cannot fully seal the entire tap changer and is still susceptible to corrosion.

[0008] (3) The existing tap changer needs to be turned before it can be rotated, and the torque is small, which is inconvenient for people with less strength to operate.

[0009] Therefore, the present invention provides a transformer tap changer protection cover to solve the problems raised in the above background technology. Summary of the invention

[0010] The object of the present invention is to provide a transformer tap changer protection cover to solve the problems raised in the above background technology.

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A transformer tap changer protection cover comprises a transformer. The transformer is provided with a tap changer. The tap changer consists of a transmission rod in the center and a slot on the outside. A transverse rod is fixed to the upper end of the transmission rod. The transverse rod is connected to a paddle through a slot hole. The paddle can be inserted into the slot. The outer side of the slot is connected to a fixing ring through a thread to fix the tap changer. The tap changer is connected to a base through a thread. An outer ring is fixed to the upper side of the base. A rotating component is rotatably connected to the outer ring. The side of the rotating component is a rotating tube. The outer side of the rotating tube is evenly rotatably connected to a power-assisting block. The lower outer edge of the rotating component is connected to the protective cover through a thread. An annular groove is provided on the lower side of the base. A sealing gasket is clamped in the annular groove. The inner side of the upper end of the rotating component is rotatably connected to a linkage plate. The linkage plate can be clamped on the paddle of the tap changer. The rotating component is driven to rotate through the power-assisting block by rotating the protective cover. The installation and removal operations are convenient, and maintenance and replacement are convenient.

[0013] Preferably, the sealing gasket is composed of a flat sealing gasket and a sealing ring, the flat sealing gasket is located in the middle of the base, and the sealing ring is close to the tap switch.

[0014] Preferably, the flat sealing gasket comprises an inner raised ring and an outer corrugated ring, the upper side of the corrugated ring is provided with a plurality of half rings with different inner diameters, and the lower side of the flat sealing gasket is flush, and sealing is achieved by pressure.

[0015] Preferably, a plurality of circumferentially distributed positioning columns are fixed to the middle of the base, and grooves are provided on the lower side of the rotating tube corresponding to the positioning columns for driving the base to rotate. A plurality of spring frames are provided on the lower side of the outer ring, and the spring frames are composed of an upper fixed plate and a lower spring. The lower end of the spring is fixedly connected to the base, and the fixed plate is slidably connected to the lower side of the rotating tube, so that the rotating tube is separated from the positioning columns.

[0016] Preferably, a groove for accommodating the assisting block is provided on the side of the rotating tube, a coil spring is provided at the rotating upper end of the assisting block, a pressure plate is provided on the inner side of the assisting block, the pressure plate is slidably connected in the limiting groove, an arc-shaped sealing strip is fixed on the inner side of the pressure plate, the sealing strip is opposite to the fixing ring, thereby improving the sealing between the fixing ring and the base.

[0017] Preferably, a lifting spring is provided on the lower side of the linkage plate, the movable end of the linkage plate is U-shaped, the movable end is clamped on the paddle, the linkage plate is movably connected to the plug block, and the paddle is provided with a hole for the plug block to pass through.

[0018] Preferably, the protective cover includes a silicone cover, which is in the shape of a "round cap" to achieve the effect of waterproof and dustproof, thereby preventing the tap switch from rusting. The silicone cover is made of silicone rubber, which is hydrophobic and does not react with oxygen and ozone, so it will not age and is not affected by ultraviolet rays and other electric charge discharges.

[0019] Preferably, a frame is embedded inside the silicone cover, and a round cap-shaped shielding net is provided outside the frame.

[0020] Preferably, the skeleton is composed of a plurality of U-shaped frames and an annular frame at the bottom to improve the overall strength. The inner side of the annular frame is connected to the convex ring of the base by threads. The outer side surface of the convex ring is an inclined surface, and the inner side of the lower end of the annular frame is also an inclined surface, so that the crimping surface is inclined upward to improve the sealing performance.

[0021] Preferably, an inner pressure ring is fixed to the inner side of the middle part of the protective cover, and the lower side of the inner pressure ring is pressed on the linkage plate.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention provides a tapped base and a protective cover, the bottom of the base is opened, the contact surface on the lower side is enlarged, and the sealing between the fixing ring and the base is improved through the pressure plate.

[0024] 2. The present invention achieves waterproof and dustproof effects through the "round cap" shaped silicone cover, thereby preventing the tap switch from rusting. The silicone cover is made of silicone rubber, which is hydrophobic and does not react with oxygen and ozone, so it will not age and is not affected by ultraviolet rays and other electrical discharges.

[0025] 3. The power-assisting block can be used for effortless rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is a schematic diagram of the structure of a transformer tap changer protection cover.

[0027] Figure 2 The figure is a schematic diagram of the split structure of a transformer tap changer protection cover.

[0028] Figure 3 The figure is a schematic diagram of the structure of a transformer tap changer protection cover during adjustment.

[0029] Figure 4 The present invention is a schematic diagram of the internal structure of a protective cover in a transformer tap changer protective cover.

[0030] Figure 5 The present invention is a schematic diagram of the front cross-sectional structure of a transformer tap changer protection cover.

[0031] In the figure: 1. Transformer; 2. Tap changer; 3. Sealing pad; 4. Base; 5. Rotating assembly; 6. Protective cover;

[0032] 21. fixing ring; 22. paddle; 23. transmission rod; 24. slot;

[0033] 31. Flat sealing pad; 32. Sealing ring; 41. Outer ring; 42. Positioning column; 43. Spring frame; 51. Rotating tube; 52. Power-assisting block; 53. Limiting groove; 54. Pressing plate; 55. Linkage plate; 56. Inserting block; 57. Lifting spring; 61. Silicone cover; 62. Frame; 63. Shielding net; 64. Inner pressure ring. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figures 1 to 5 In an embodiment of the present invention, a transformer tap changer protection cover includes a transformer 1, a tap changer 2 is provided on the transformer 1, the tap changer 2 is composed of a central transmission rod 23 and an outer slot 24, a transverse rod is fixed to the upper end of the transmission rod 23, the transverse rod is connected to a paddle 22 through a slot, the paddle 22 can be inserted into the slot 24, the outer side of the slot 24 is connected to a fixing ring 21 through a thread, the tap changer 2 is fixed, the tap changer 2 is connected to a base 4 through a thread, an outer ring 41 is fixed to the upper side of the base 4, and a rotation connection is formed inside the outer ring 41. The rotating assembly 5 is connected to the rotating assembly 5. The side of the rotating assembly 5 is a rotating tube 51. The outer side of the rotating tube 51 is evenly rotated to connect the booster block 52. The lower outer edge of the rotating assembly 5 is connected to the protective cover 6 through a thread. The lower side of the base 4 is provided with an annular groove, and the sealing gasket 3 is clamped in the annular groove. The inner side of the upper end of the rotating assembly 5 is rotatably connected to the linkage plate 55. The linkage plate 55 can be clamped on the paddle 22 of the tap switch 2. By rotating the protective cover 6, the rotating assembly 5 is driven to rotate through the booster block 52. The installation and removal operations are convenient, and it is easy to maintain and replace. .

[0036] The sealing gasket 3 is composed of a flat sealing gasket 31 and a sealing ring 32. The flat sealing gasket 31 is located in the middle of the base 4, and the sealing ring 32 is close to the tap changer 2. The flat sealing gasket 31 is composed of a raised ring of an inner ring and a corrugated ring of an outer ring. The upper side of the corrugated ring is provided with a plurality of half rings with different inner diameters. The lower side of the flat sealing gasket 31 is flush, and sealing is achieved by pressure. A plurality of circumferentially distributed positioning columns 42 are fixed to the middle of the base 4. A groove is provided on the lower side of the rotating tube 51 corresponding to the positioning columns 42, which is used to drive the base 4 to rotate. A plurality of spring frames 43 are provided on the lower side of the outer ring 41. The spring frame 43 is composed of an upper fixing plate and a lower spring. The lower end of the spring is fixedly connected to the base 4, and the fixing plate is slidably connected to the lower side of the rotating tube 51, so that the rotating tube 51 is separated from the positioning column 42.

[0037] The side of the rotating tube 51 is provided with a groove for accommodating the boosting block 52, and a coil spring is provided at the upper end of the boosting block 52. A pressure plate 54 is provided on the inner side of the boosting block 52, and the pressure plate 54 is slidably connected in the limiting groove 53. An arc-shaped sealing strip is fixed on the inner side of the pressure plate 54, and the sealing strip is directly opposite to the fixing ring 21 to improve the sealing between the fixing ring 21 and the base 4. A lifting spring 57 is provided on the lower side of the linkage plate 55. The movable end of the linkage plate 55 is U-shaped, and the movable end is clamped on the paddle 22. The linkage plate 55 is movably connected to the plug block 56, and the paddle 22 is provided with a hole for the plug block 56 to pass through.

[0038] The protective cover 6 includes a silicone cover 61, which is in a "round cap" shape and has the effect of being waterproof and dustproof, thereby preventing the tap switch 2 from rusting. The silicone cover 61 is made of silicone rubber, which is hydrophobic and does not react with oxygen and ozone, so it will not age and is not affected by ultraviolet rays and other electric charge discharges. A skeleton 62 is embedded on the inner side of the silicone cover 61, and a round cap-shaped shielding net 63 is provided on the outer side of the skeleton 62. The skeleton 62 is composed of a plurality of U-shaped frames and a ring frame at the bottom to improve the overall strength. The inner side of the ring frame is connected to the convex ring of the base 4 by threads. The outer side surface of the convex ring is an inclined surface, and the inner side of the lower end of the annular frame is also an inclined surface, so that the crimping surface is inclined upward to improve the sealing performance. An inner pressure ring 64 is fixed to the inner side of the middle part of the protective cover 6, and the lower side of the inner pressure ring 64 is pressed on the linkage plate 55.

[0039] The working principle of the present invention is:

[0040] During installation, the rotating assembly 5 is pressed downward to compress the spring frame 43, so that the rotating tube 51 is clamped on the positioning column 42, and then the base 4 is rotated through the opened assisting block 52, and the base 4 is connected to the outlet of the tap changer 2 of the transformer 1 through the threads on the inner side of the base 4, and is sealed through the sealing gasket 3, and then connected to the protective cover 6 through the convex ring to form a whole.

[0041] When the tap switch 2 needs to be adjusted, the protective cover 6 is rotated and lifted upward. The assist block 52 opens outward under the elastic force of the coil spring, and the rotating tube 51 is rotated so that the linkage plate 55 is directly opposite to the paddle 22. The linkage plate 55 is pressed downward, and the lifting spring 57 is compressed. The plug block 56 is moved to insert the paddle 22. After being released, the lifting spring 57 drives the paddle 22 to lift upward. The slot hole allows the paddle 22 to have space to move upward. The paddle 22 is unlocked from the card slot 24, and the position of the transmission rod 23 can be adjusted by the rotating tube 51 to adjust the voltage. After the adjustment is completed, the protective cover 6 is tightened, and the inner pressure ring 64 presses the linkage plate 55 and the paddle 22. The paddle 22 is inserted into the card slot 24. When it is not inserted, it lacks positioning and cannot press the linkage plate 55 downward, which can form a warning. When adjusting the base 4, the plug block 56 can be pulled out to release the lock.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A transformer tap changer protection cover, comprising a transformer (1), a tap changer (2) being provided on the transformer (1), the tap changer (2) being composed of a central transmission rod (23) and an outer slot (24), characterized in that: A transverse rod is fixed to the upper end of the transmission rod (23), and the transverse rod is connected to the paddle (22) through a slot hole. The outer side of the clamping groove (24) is connected to the fixing ring (21) through a thread to fix the tap changer (2). The tap changer (2) is connected to the base (4) through a thread. An outer ring (41) is fixed to the upper side of the base (4), and a rotating assembly (5) is rotatably connected inside the outer ring (41). The side of the rotating assembly (5) is a rotating tube (51), and the outer side of the rotating tube (51) is evenly rotatably connected to the assisting block (52). The lower outer edge of the rotating assembly (5) is connected to the protective cover (6) through a thread. The lower side of the base (4) is provided with an annular groove, and a sealing gasket (3) is clamped in the annular groove. The inner side of the upper end of the rotating assembly (5) is rotatably connected to the paddle (22) of the tap changer (2). The linkage plate (55) can be clamped on the paddle (22) of the tap changer (2).

2. A transformer tap changer protection cover according to claim 1, characterized in that: The sealing gasket (3) is composed of a flat sealing gasket (31) and a sealing ring (32), wherein the flat sealing gasket (31) is located in the middle of the base (4) and the sealing ring (32) is close to the tap switch (2).

3. A transformer tap changer protection cover according to claim 2, characterized in that: The flat sealing gasket (31) comprises an inner raised ring and an outer corrugated ring, the upper side of the corrugated ring is provided with a plurality of half rings with different inner diameters, and the lower side of the flat sealing gasket (31) is flush.

4. A transformer tap changer protection cover according to claim 1, characterized in that: A plurality of circumferentially distributed positioning columns (42) are fixed to the middle of the base (4); a groove is provided on the lower side of the rotating tube (51) corresponding to the positioning columns (42); a plurality of spring frames (43) are provided on the lower side of the outer ring (41); the spring frame (43) is composed of an upper fixing plate and a lower spring; the lower end of the spring is fixedly connected to the base (4); and the fixing plate is slidably connected to the lower side of the rotating tube (51).

5. The transformer tap changer protection cover according to claim 1, characterized in that: The side of the rotating tube (51) is provided with a groove for accommodating the boosting block (52), the upper end of the boosting block (52) is provided with a coil spring, the inner side of the boosting block (52) is provided with a pressing plate (54), the pressing plate (54) is slidably connected in the limiting groove (53), and the inner side of the pressing plate (54) is fixed with an arc-shaped sealing strip, and the sealing strip is directly opposite to the fixing ring (21).

6. The transformer tap changer protection cover according to claim 1, characterized in that: A lifting spring (57) is provided on the lower side of the linkage plate (55); the movable end of the linkage plate (55) is U-shaped and is clamped on the paddle (22); the linkage plate (55) is movably connected to the plug block (56); and the paddle (22) is provided with a hole through which the plug block (56) can pass.

7. The transformer tap changer protection cover according to claim 1, characterized in that: The protective cover (6) comprises a silicone cover (61), the silicone cover (61) is in a "round cap" shape, and the silicone cover (61) is made of silicone rubber.

8. The transformer tap changer protection cover according to claim 7, characterized in that: A frame (62) is embedded inside the silicone cover (61), and a round cap-shaped shielding net (63) is provided outside the frame (62).

9. A transformer tap changer protection cover according to claim 8, characterized in that: The frame (62) is composed of a plurality of U-shaped frames and a ring frame at the bottom. The inner side of the ring frame is connected to the convex ring of the base (4) through threads. The outer side of the convex ring is an inclined surface, and the inner side of the lower end of the ring frame is also an inclined surface.

10. The transformer tap changer protection cover according to claim 1, characterized in that: An inner pressure ring (64) is fixed to the inner side of the middle part of the protection cover (6), and the lower side of the inner pressure ring (64) is pressed on the linkage plate (55).

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