Dry-type transformer capable of preventing coil from loosening

Abstract

The utility model provides a dry-type transformer capable of preventing a coil from loosening, which comprises a shell, an opening is arranged on the front wall of the shell and is provided with a switch door, fans are symmetrically arranged on the inner top wall of the shell, and a plurality of dry-type transformer substrates are arranged in the shell through a plurality of bases. Each base is connected with the corresponding dry-type transformer base body through a corresponding damping piece, each dry-type transformer base body comprises an iron core, the iron core is sleeved with a coil winding, the iron core is fixed to a lower mounting plate, a vertical block is fixed to the upper end of an upper mounting plate, a groove sunken towards the coil winding is formed in the vertical block, and the vertical block is fixed to the upper end of the upper mounting plate. The fixing screw penetrates through the upper nut, the threaded hole in the ejector rod and the lower nut and abuts against the interior of the groove. The dry-type transformer has the advantages that the coil winding of the dry-type transformer base body is fixed by rotating the fixing screws, and the phenomenon that a coil is loosened is effectively avoided; and under the action of the damping plate, the effect of buffering the dry-type transformer when vibration occurs is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer equipment, in particular to a dry-type transformer capable of preventing coils from loosening. Background Art

[0002] Dry-type transformers are transformers whose cores and windings are not immersed in insulating oil. They are widely used in almost all electrical equipment such as power stations, factories, hospitals, etc. After working for a long time, the coil fixings of existing dry-type transformers are prone to loosening, affecting normal use; slight vibrations during use or installation can easily damage the internal electronic components and shorten their service life. Utility Model Content

[0003] Based on the problems arising from the above background, the purpose of the utility model is to provide a dry-type transformer with anti-coil loosening function, which effectively prevents the coil from falling off, improves heat dissipation, plays a buffering role and prolongs its service life.

[0004] The technical scheme of the utility model is: a dry-type transformer for preventing coils from loosening, comprising a shell, an opening in the front wall of the shell and a switch door, a plurality of heat dissipation holes on the side walls of the shell, a fan symmetrically arranged on the top wall inside the shell, a plurality of dry-type transformer substrates are arranged in the shell through a plurality of bases, each dry-type transformer substrate has the same structure, each base is connected to its corresponding dry-type transformer substrate through a respective corresponding shock absorbing member, the shock absorbing member comprises a lower mounting plate, a shock absorbing plate and a rectangular fixing sleeve, the base is fixed on the bottom wall of the shell, the lower mounting plate is fixed on the base through a plurality of rectangular fixing sleeves, the shock absorbing plate is sleeved inside the rectangular fixing sleeve, the lower mounting plate is arranged on the end surface of the shock absorbing plate, and the base is arranged at the bottom of the shock absorbing plate.

[0005] The dry-type transformer matrix comprises an iron core, a coil winding is arranged on the outer sleeve of the iron core, the iron core is fixed on the lower mounting plate, a left rod and a right rod are symmetrically arranged on the lower mounting plate, a left hole and a right hole matching with the left rod and the right rod are respectively arranged on the left and right sides of the upper mounting plate, the lower ends of the left rod and the right rod are fixed on the lower mounting plate, the upper ends of the left rod and the right rod pass through the left hole and the right hole respectively, and are respectively connected to the left limit plate and the right limit plate, a plurality of limiting protrusions are arranged on the lower surface of the upper mounting plate, and the limiting protrusions are pressed against the upper end of the coil winding, a vertical block is fixed on the upper end of the upper mounting plate, a groove recessed toward the coil winding is opened on the vertical block, a fixing screw passes through the upper nut, the threaded hole on the top rod, and the lower nut, and is pressed into the groove.

[0006] Furthermore, a filter screen is provided at the heat dissipation hole.

[0007] Furthermore, an aramid paper insulation layer is provided between the iron core and the coil winding.

[0008] Furthermore, two ends of the push rod are fixed to the upper end of the housing and are arranged below the fan.

[0009] The advantages and positive effects of the utility model are as follows: by adopting the above technical scheme, the coil winding of the dry-type transformer base is fixed by rotating the fixing screws, thereby effectively preventing the coil from loosening; under the action of the shock-absorbing plate, the dry-type transformer is buffered when vibration occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0011] Figure 2 It is a schematic diagram of the structure of the shock absorber.

[0012] In the figure:

[0013] 1. Shell 2. Fan 3. Base

[0014] 4. Dry-type transformer base 5. Shock absorber 6. Coil winding

[0015] 7. Lower mounting plate 8. Shock-absorbing plate 9. Rectangular fixing sleeve

[0016] 10. Left rod 11. Right rod 12. Upper mounting plate

[0017] 13. Vertical block 14. Fixing screw 15. Ejector rod DETAILED DESCRIPTION

[0018] like Figure 1-2 As shown, the technical solution of the utility model is: a dry-type transformer for preventing coils from loosening, comprising a shell 1, an opening in the front wall of the shell 1, and a switch door, a plurality of heat dissipation holes are arranged on the side wall of the shell 1, and a fan 2 is symmetrically arranged on the top wall inside the shell 1. The coil winding of the dry-type transformer will generate a certain amount of heat during operation. If the heat cannot be dissipated in time, the operating reliability of the dry-type transformer coil will be affected and the service life will be greatly reduced. Therefore, a fan 2 is arranged on the top of the shell 1 to ensure good heat dissipation of the coil.

[0019] The shell 1 is provided with a plurality of dry-type transformer substrates 4 through a plurality of bases 3. The structure of each dry-type transformer substrate 4 is the same. Each base 3 is connected to its corresponding dry-type transformer substrate 4 through a respective corresponding shock absorbing member 5. The shock absorbing member 5 includes a lower mounting plate 7, a shock absorbing plate 8 and a rectangular fixing sleeve 9. The base 3 is fixed on the bottom wall of the shell 1. The lower mounting plate 7 is fixed on the base 3 through a plurality of rectangular fixing sleeves 9. The shock absorbing plate 8 is sleeved inside the rectangular fixing sleeve 9. The lower mounting plate 7 is arranged on the end surface of the shock absorbing plate 8. The base 3 is arranged at the bottom of the shock absorbing plate 8. The shock absorbing plate and the rectangular fixing sleeve are both hard rubber plates. Under the action of the shock absorbing plate 8, the dry-type transformer substrate is buffered when vibration occurs.

[0020] The dry-type transformer base 4 includes an iron core, a coil winding 6 is arranged on the outer sleeve of the iron core, the iron core is fixed on the lower mounting plate 7, a left rod 10 and a right rod 11 are symmetrically arranged on the lower mounting plate 7, and a left hole and a right hole are respectively arranged on the upper mounting plate 12 to match the left rod 10 and the right rod 11. The lower ends of the left rod 10 and the right rod 11 are fixed on the lower mounting plate 7, and the upper ends of the left rod 10 and the right rod 11 pass through the left hole and the right hole respectively, and are respectively connected to the left limit plate and the right limit plate. A plurality of limiting protrusions are provided on the lower surface of the upper mounting plate 12, and the limiting protrusions are pressed against the upper end of the coil winding 6. A vertical block 13 is fixed on the upper end of the upper mounting plate 12, and a groove recessed toward the coil winding is opened on the vertical block 13. A fixing screw 14 passes through the threaded holes on the upper nut, the top rod 15, and the lower nut, and is pressed in the groove. The coil winding of the dry-type transformer base 4 is fixed by rotating the fixing screw 14.

[0021] In this embodiment, a filter screen is provided at the heat dissipation hole.

[0022] In this embodiment, an aramid paper insulation layer is provided between the iron core and the coil winding 6 .

[0023] In this embodiment, both ends of the push rod 15 are fixed to the upper end of the housing 1 .

[0024] The working process and principle of this embodiment: During installation, the dry-type transformer base is installed on the base inside the shell through the shock-absorbing plate and the rectangular fixing sleeve, which effectively avoids the problem of internal electronic components falling due to external vibration and improves its service life; when the coil winding becomes loose, the fixing screw is rotated to move it downward so that its lower end is gradually pressed into the groove, so that the coil winding of the upper mounting plate is clamped, further preventing the coil winding from loosening.

[0025] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A dry-type transformer for preventing coil loosening, characterized in that: The invention comprises a shell, wherein the front wall of the shell is opened and provided with a switch door, the side wall of the shell is provided with a plurality of heat dissipation holes, the top wall of the shell is symmetrically provided with a fan, the shell is provided with a plurality of dry-type transformer substrates through a plurality of bases, each dry-type transformer substrate has the same structure, each base is connected to its corresponding dry-type transformer substrate through a corresponding shock absorbing member, the shock absorbing member comprises a lower mounting plate, a shock absorbing plate and a rectangular fixing sleeve, the base is fixed on the bottom wall of the shell, the lower mounting plate is fixed on the base through a plurality of rectangular fixing sleeves, the shock absorbing plate is sleeved inside the rectangular fixing sleeve, the lower mounting plate is arranged on the end surface of the shock absorbing plate, and the base is arranged at the bottom of the shock absorbing plate. The dry-type transformer matrix comprises an iron core, a coil winding is arranged on the outer sleeve of the iron core, the iron core is fixed on the lower mounting plate, a left rod and a right rod are symmetrically arranged on the lower mounting plate, a left hole and a right hole matching with the left rod and the right rod are respectively arranged on the left and right sides of the upper mounting plate, the lower ends of the left rod and the right rod are fixed on the lower mounting plate, the upper ends of the left rod and the right rod pass through the left hole and the right hole respectively, and are respectively connected to the left limit plate and the right limit plate, a plurality of limiting protrusions are arranged on the lower surface of the upper mounting plate, and the limiting protrusions are pressed against the upper end of the coil winding, a vertical block is fixed on the upper end of the upper mounting plate, a groove recessed toward the coil winding is opened on the vertical block, a fixing screw passes through the upper nut, the threaded hole on the top rod, and the lower nut, and is pressed into the groove.

2. A dry-type transformer for preventing coil loosening according to claim 1, characterized in that: A filter screen is arranged at the heat dissipation hole.

3. The dry-type transformer for preventing coil loosening according to claim 1, characterized in that: An aramid paper insulation layer is arranged between the iron core and the coil winding.

4. The dry-type transformer for preventing coil loosening according to claim 1, characterized in that: The two ends of the top rod are fixed to the upper end of the shell and arranged below the fan.

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