35kV high-capacity on-load switch dry-type transformer protection device

Abstract

According to the 35kV high-capacity on-load switch dry-type transformer protection device, a transformer comprises an iron core, a high-voltage winding and a low-voltage winding, the high-voltage winding and the low-voltage winding are sleeved on the iron core, and the high-voltage winding is sleeved on the outer side of the low-voltage winding; after being wound, the low-voltage winding is poured into a whole through resin, and after being wound, the high-voltage winding is also poured into a whole through resin; a large number of vertical air channel division bars are mounted between the high-voltage winding and the low-voltage winding to form a large number of vertical air channels; a transformer shell adopts a steel wire mesh type guardrail, the top of the transformer is exposed, a temperature control box is installed on the mesh type guardrail, and an operation mechanism box of an on-load switch extends out of a rectangular hole in the side face of the guardrail. The transformer has the advantages that heat dissipation of the transformer is facilitated, observation of the transformer is facilitated, arrangement of primary and secondary wiring is facilitated, the temperature controller and the load switch are inlaid on the lower grid guardrail, hot-line operation of the transformer can be achieved, safety of operators is protected, operation is easy, and the influence of a shell on temperature rise of the transformer is reduced.

Description

Technical Field

[0001] The utility model relates to a 35kV large-capacity on-load switch dry-type transformer protection device, belonging to the technical field of transformer protection mechanisms. Background Art

[0002] Large-capacity on-load voltage regulation is a voltage regulation method that can change the voltage by switching the tap position when the transformer is running under load. Large-capacity on-load voltage regulation transformers have large volume and large losses, so the heat generated is relatively large. If traditional shell protection devices are used, it will be unfavorable for heat dissipation, resulting in the transformer not being able to operate at full capacity. Summary of the invention

[0003] The utility model provides a 35kV large-capacity on-load switch dry-type transformer protection device to make up for the deficiencies of the prior art.

[0004] The technical solution of the utility model is as follows:

[0005] A 35kV large-capacity on-load switch dry-type transformer protection device, the transformer comprises an iron core and a high-voltage winding and a low-voltage winding sleeved on the iron core, the high-voltage winding is sleeved on the outside of the low-voltage winding; the characteristics are: after the low-voltage winding is wound, it is cast into a whole with resin, and after the high-voltage winding is wound, it is also cast into a whole with resin; a large number of vertical airway spacers are installed between the high-voltage winding and the low-voltage winding to form a large number of vertical airways.

[0006] The transformer shell adopts a grid-type guardrail, that is, the transformer is protected by a wire mesh guardrail on all sides. The top of the transformer is exposed without a grid guardrail. The temperature control box is installed on the grid guardrail, and the operating mechanism box of the load switch extends from the rectangular hole on the side of the guardrail.

[0007] The wire mesh guardrail is fixed on reinforced columns. A large number of reinforced columns are fixed on the ground at a certain distance. One side of the guardrail is equipped with a mesh door with a lock.

[0008] Upper clamps are installed on both sides of the upper iron yoke of the iron core, and the upper iron yoke is clamped by the upper clamps and bolts; lower clamps are installed on both sides of the lower iron yoke of the iron core, and the lower iron yoke is clamped by the lower clamps and bolts; a support seat is fixedly installed at the lower end of the lower clamp, and the support seat is fixed to the ground foundation by embedded bolts.

[0009] The on-load switch is installed on the on-load switch bracket, the operating mechanism box of the on-load switch is installed on a column on one side of the on-load switch bracket, and the on-load switch bracket is spaced a certain distance from the transformer; the three-phase high-voltage windings A, B, and C of the transformer are respectively connected to the three-phase on-load switches A, B, and C through connecting cables; the three-phase on-load switches A, B, and C are arranged side by side, and the three-phase on-load switches A, B, and C are arranged opposite to the three-phase windings A, B, and C of the transformer.

[0010] A cooling fan is installed on the support base.

[0011] The beneficial effect of the utility model is that it has been proved in practice that the 35kV large-capacity on-load dry-type transformer protection device is conducive to the heat dissipation of the transformer, convenient for observing the transformer, and conducive to the arrangement of primary and secondary wiring. The temperature controller and the on-load switch are embedded in the lower grid guardrail, which can realize live operation of the transformer, protect the safety of the operator, and is easy to operate, reduce costs, make it simple to install on site, safe to operate, reduce the impact of the shell on the temperature rise of the transformer, and improve the overall performance of the transformer. This protective device makes up for the defects of the previous shell and is more conducive to the operation of the transformer and the installation of primary and secondary wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The schematic diagram of the top view of the general assembly layout is as follows; Figure 2 It is a schematic diagram of the front view of the on-load switch and its bracket; Figure 3 This is a top view diagram of the protective fence layout. Figure 4 This is a schematic diagram of the transformer front view.

[0013] In the figure, there are iron core 1, high voltage winding 2, low voltage winding 3, airway 4, guardrail 5, operating mechanism box 6, temperature control box 7, upper clamp 8, connecting cable 9, lower clamp 10, support seat 11, load switch bracket 12, column 13, reinforcement column 14, net door 15, load switch 16. Low voltage coil lead head 17, high voltage coil lead head 18. DETAILED DESCRIPTION

[0014] The accompanying drawing shows an embodiment of the present utility model.

[0015] The utility model discloses a 35kV large-capacity on-load switch dry-type transformer protection device. The transformer comprises an iron core 1 and a high-voltage winding 2 and a low-voltage winding 3 sleeved on the iron core, wherein the high-voltage winding is sleeved on the outside of the low-voltage winding; after the low-voltage winding is wound, it is cast as a whole with resin, and after the high-voltage winding is wound, it is also cast as a whole with resin; a large number of vertical airway spacers are installed between the high-voltage winding and the low-voltage winding to form a large number of vertical airways 4.

[0016] The transformer housing adopts a grid-type guardrail 5, that is, the transformer is protected by a wire mesh guardrail around it, the top of the transformer is exposed, and no mesh guardrail is installed. The temperature control box 7 is installed on the mesh guardrail, and the operating mechanism box 6 of the load switch 16 extends from the rectangular hole on the side of the guardrail.

[0017] The wire mesh guardrail is fixed on a reinforcement column 14, and a large number of reinforcement columns are fixed on the ground at a certain distance. A mesh door 15 is provided on one side of the guardrail, and the mesh door has a lock.

[0018] Upper clamps 8 are installed on both sides of the upper iron yoke of the iron core, and the upper iron yoke is clamped by the upper clamps and bolts; lower clamps 10 are installed on both sides of the lower iron yoke of the iron core, and the lower iron yoke is clamped by the lower clamps and bolts; a support seat 11 is fixedly installed at the lower end of the lower clamp, and the support seat is fixed to the ground foundation by embedded bolts.

[0019] The on-load switch is installed on the on-load switch bracket 12, the operating mechanism box 6 of the on-load switch is installed on a column 13 on one side of the on-load switch bracket, and the on-load switch bracket is spaced a certain distance from the transformer; the three-phase high-voltage windings A, B, and C of the transformer are respectively connected to the three-phase on-load switches A, B, and C through connecting cables 9; the three-phase on-load switches A, B, and C are arranged side by side, and the three-phase on-load switches A, B, and C are arranged opposite to the three-phase windings A, B, and C of the transformer.

[0020] A cooling fan is installed on the support base.

[0021] The outer shell is protected by a grid-type guardrail, and the transformer is protected by a fence around it. The top of the transformer is exposed without a guardrail. The temperature control box is embedded in the grid guardrail, and the load switch operating mechanism is arranged on the side of the guardrail.

[0022] The 35kV large-capacity on-load dry-type transformer protection device is beneficial to the heat dissipation of the transformer, convenient for observation of the transformer, and conducive to the arrangement of primary and secondary wiring. The thermostat and on-load switch are embedded in the lower grid guardrail, which can realize live operation of the transformer, protect the safety of the operator, is easy to operate, and reduces costs. It makes its on-site installation simple and safe to operate, reduces the impact of the shell on the temperature rise of the transformer, and improves the overall performance of the transformer.

Claims

1. A 35kV large-capacity on-load switch dry-type transformer protection device, the transformer includes an iron core and a high-voltage winding and a low-voltage winding sleeved on the iron core, and the high-voltage winding is sleeved on the outside of the low-voltage winding; Features: After the low-voltage winding is wound, it is cast with resin as a whole. After the high-voltage winding is wound, it is also cast with resin as a whole. A large number of vertical airway spacers are installed between the high-voltage winding and the low-voltage winding to form a large number of vertical airways. The transformer shell adopts a grid-type guardrail, that is, the transformer is protected by a wire mesh guardrail on all sides. The top of the transformer is exposed without a grid guardrail. The temperature control box is installed on the grid guardrail, and the operating mechanism box of the load switch extends from the rectangular hole on the side of the guardrail.

2. The 35kV large-capacity on-load switch dry-type transformer protection device according to claim 1, Features: The wire mesh guardrail is fixed on reinforced columns. A large number of reinforced columns are fixed on the ground at a certain distance. One side of the guardrail is equipped with a mesh door with a lock.

3. The 35kV large-capacity on-load switch dry-type transformer protection device according to claim 1 or 2, Features: Upper clamps are installed on both sides of the upper iron yoke of the iron core, and the upper iron yoke is clamped by the upper clamps and bolts; lower clamps are installed on both sides of the lower iron yoke of the iron core, and the lower iron yoke is clamped by the lower clamps and bolts; a support seat is fixedly installed at the lower end of the lower clamp, and the support seat is fixed to the ground foundation by embedded bolts.

4. The 35kV large-capacity on-load switch dry-type transformer protection device according to claim 1 or 2, Features: The on-load switch is installed on the on-load switch bracket, the operating mechanism box of the on-load switch is installed on a column on one side of the on-load switch bracket, and the on-load switch bracket is spaced a certain distance from the transformer; the three-phase high-voltage windings A, B, and C of the transformer are respectively connected to the three-phase on-load switches A, B, and C through connecting cables; the three-phase on-load switches A, B, and C are arranged side by side, and the three-phase on-load switches A, B, and C are arranged opposite to the three-phase windings A, B, and C of the transformer.

5. The 35kV large-capacity on-load switch dry-type transformer protection device according to claim 1 or 2, Features: A cooling fan is installed on the support base.

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