Split-type on-load switch fixing device for 35kV dry-type transformer

Abstract

The split-type on-load switch fixing device for the 35kV dry-type transformer comprises a rectangular supporting frame, the supporting frame adopts two stand columns, a cross beam is fixed at the top ends of the stand columns, and the lower ends of the stand columns are fixed on a bottom plate of a transformer box body or a ground foundation; an on-load switch operating mechanism box and a grounding device are mounted on one of the upright posts; an A-phase switch fixing support, a B-phase switch fixing support and a C-phase switch fixing support are installed on the cross beam, the A-phase switch fixing support, the B-phase switch fixing support and the C-phase switch fixing support are spaced by a certain distance, and an A-phase switch, a B-phase switch and a C-phase switch are installed on the A-phase switch fixing support, the B-phase switch fixing support and the C-phase switch fixing support respectively. An operating mechanism box of the on-load switch is connected with a cross rod through a transmission shaft and an adapter, and the cross rod is respectively connected with an A-phase switch, a B-phase switch and a C-phase switch. The beneficial effects are that the connection between the winding outgoing line terminal and the lead of the on-load switch is facilitated, and the problem of creepage between phases is prevented by the mode that the three-phase switch and the three phases of the transformer are oppositely arranged.

Description

Technical Field

[0001] The utility model relates to a 35kV dry-type transformer split-type on-load switch fixing device, belonging to the technical field of transformer auxiliary mechanism manufacturing. Background Art

[0002] 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. For the on-load voltage regulation transformer that directly supplies power to the power supply center, under the premise of achieving local balance of reactive power partition, the tap is adjusted as the regional load increases or decreases, in coordination with the switching of the reactive compensation equipment parallel capacitor and low-voltage reactor, so as to ensure the quality of the power supply voltage to users at any time. Summary of the invention

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

[0004] The utility model is realized by the following technical solutions:

[0005] The utility model discloses a 35kV dry-type transformer split-type on-load switch fixing device, which is characterized in that: it comprises a rectangular support frame, the support frame adopts two columns, a crossbeam is fixed on the top of the columns, and the lower end of the column is fixed on the bottom plate of the transformer box or the ground foundation; an on-load switch operating mechanism box and a grounding device are installed on one of the columns; an A-phase switch fixing bracket, a B-phase switch fixing bracket, and a C-phase switch fixing bracket are installed on the crossbeam, and the A-phase, B-phase, and C-phase switch fixing brackets are spaced a certain distance apart, and the A-phase, B-phase, and C-phase switches are respectively installed on the A-phase, B-phase, and C-phase switch fixing brackets; the on-load switch operating mechanism box is connected to a crossbar via a transmission shaft and an adapter, and the crossbar is respectively connected to the A-phase switch, the B-phase switch, and the C-phase switch; the A-phase, B-phase, and C-phase windings on the high-voltage side of the transformer are respectively connected to the A-phase, B-phase, and C-phase switches via connecting cables.

[0006] Further preferably, the operating mechanism box is arranged on the left or right side of the support frame, the A, B, C three-phase switches are arranged side by side, and the A, B, C three-phase switches are arranged opposite to the A, B, C three-phase windings of the transformer.

[0007] Further preferably, a transfer platform bracket and an operating mechanism box bracket are installed on the column, a transfer joint between the transmission mechanism and the crossbar is installed on the transfer platform bracket by bolts, and an operating mechanism box is installed on the operating mechanism box bracket by bolts. A horizontal fixed base and a triangular reinforcement plate are welded at the lower end of the column, and the fixed base is fixed to the bottom plate of the transformer box or the ground foundation by bolts; when the fixed base is fixed to the ground foundation by embedded bolts, the transformer box has no bottom plate.

[0008] Further preferably, a plurality of lifting noses are welded on the crossbeam for moving the on-load switch fixing device by a crane.

[0009] The adapter between the transmission shaft and the cross bar includes a bevel gear fixed at the upper end of the transmission shaft and a bevel gear fixed at the end of the cross bar. The two bevel gears are meshed with each other and installed in a gear box body. The gear box is installed on the adapter platform bracket through bolts. The operating mechanism of the on-load switch drives the transmission shaft to rotate, and the transmission shaft drives the cross bar to rotate through the bevel gear, and the cross bar drives the A-phase switch, the B-phase switch, and the C-phase switch to operate.

[0010] The beneficial effect of the utility model is that, as proved by practice, the 35kV dry-type transformer split-type on-load switch fixing device is conducive to the assembly of the transformer and convenient for connecting the winding lead terminal with the lead of the on-load switch. The relative arrangement of the three-phase switch and the three-phase of the transformer prevents the problem of creepage between the phases, makes the connecting wires relatively parallel, beautiful, easy to operate, reduces costs, makes its structure simple, fast to produce, high accuracy, and improves the overall performance of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the top view of the overall arrangement; Figure 2 It is a schematic diagram of the front view of the n-type bracket; Figure 3 This is a schematic diagram of the right side view of the switch column.

[0012] In the figure, 1 is the transformer winding, 2 is the connecting cable, 3 is the on-load switch operating mechanism box, 4 is the transmission shaft, 5 is the support frame, 6 is the C-phase switch, 7 is the B-phase switch, 8 is the A-phase switch, 9 is the A-phase switch fixing bracket, 10 is the B-phase switch fixing bracket, 11 is the C three-phase switch fixing bracket, 12 is the lifting nose, 13 is the bracket crossbeam, 14 is the bracket column, 15 is the reinforcement plate, 16 is the grounding device, 17 is the fixed base, 18 is the transfer platform bracket, 19 is the operating mechanism box bracket, 20 is the cross bar, and 21 is the bevel gear. DETAILED DESCRIPTION

[0013] The accompanying drawings show a specific embodiment of the present utility model.

[0014] The utility model discloses a 35kV dry-type transformer split-type on-load switch fixing device, comprising a rectangular support frame 5, wherein the support frame adopts two columns 14, a crossbeam 13 is fixed on the top of the columns, and the lower end of the column is fixed on the bottom plate of the transformer box or the ground foundation; an on-load switch operating mechanism box 3 and a grounding device 16 are installed on one of the columns; an A-phase switch fixing bracket 9, a B-phase switch fixing bracket 10, and a C-phase switch fixing bracket 11 are installed on the crossbeam, and the A-phase, B-phase, and C-phase switch fixing brackets are spaced at a certain distance, and an A-phase switch 8, a B-phase switch 7, and a C-phase switch 6 are respectively installed on the A-phase, B-phase, and C-phase switch fixing brackets; the on-load switch operating mechanism box is connected to a crossbar 20 via a transmission shaft 4 and an adapter, and the crossbar is respectively connected to the A-phase switch, the B-phase switch, and the C-phase switch; the A-phase winding on the high-voltage side of the transformer is connected to the A-phase switch via a connecting cable, the B-phase winding is connected to the B-phase switch via a connecting cable, and the C-phase winding 1 is connected to the C-phase switch via a connecting cable 2.

[0015] The on-load switch operating mechanism box 3 is arranged on the left or right side of the support frame 5, and the A, B, C three-phase switches are arranged side by side, and the A, B, C three-phase switches are arranged opposite to the A, B, C three-phase windings of the transformer.

[0016] The column is equipped with a transfer platform bracket 18 and an operating mechanism box bracket 19. The transfer platform bracket is bolted with a transfer joint between the transmission mechanism and the crossbar, and the operating mechanism box is bolted with an operating mechanism box bracket. A horizontal fixed base 17 and a triangular reinforcement plate 15 are welded at the lower end of the column. The fixed base is bolted to the bottom plate of the transformer box or the ground foundation; when the fixed base is fixed to the ground foundation by pre-buried bolts, the transformer box has no bottom plate.

[0017] A plurality of lifting noses 12 are welded on the cross beam for use in moving the on-load switch fixing device by a crane.

[0018] The adapter between the vertical transmission shaft 4 of the on-load switch and the cross bar 20 includes a bevel gear 21 fixed at the upper end of the transmission shaft and a bevel gear fixed at the end of the cross bar. The two bevel gears are meshed with each other. The two bevel gears are installed in the gear box body, and the gear box is installed on the adapter platform bracket 18 through bolts; the operating mechanism of the on-load switch drives the transmission shaft to rotate, the transmission shaft drives the cross bar to rotate through the bevel gear, and the cross bar drives the A-phase switch, B-phase switch, and C-phase switch to operate.

[0019] The on-load switch bracket adopts an n-shaped frame structure, the frame adopts a rectangular steel structure, the transmission shaft passes through the column to connect the operating mechanism, the operating mechanism is arranged on the left or right side according to user requirements, the A, B, and C phase switches are arranged side by side, and the three-phase switch is arranged opposite to the three phases of the transformer.

[0020] Practice has proved that the 35kV dry-type transformer split on-load switch fixture is conducive to the assembly of the transformer and convenient for connecting the winding lead terminal with the on-load switch lead. The relative arrangement of the three-phase switch and the three-phase transformer prevents the problem of creepage between the phases, makes the connecting wires relatively parallel, beautiful, easy to operate, reduces costs, makes it simple in structure, fast in production, high in accuracy, and improves the overall performance of the transformer.

Claims

1. A 35kV dry-type transformer split-type on-load switch fixing device, characterized by: It comprises a rectangular support frame, which adopts two columns, a crossbeam is fixed on the top of the columns, and the lower end of the column is fixed on the bottom plate of the transformer box or the ground foundation; an on-load switch operating mechanism box and a grounding device are installed on one of the columns; an A-phase switch fixing bracket, a B-phase switch fixing bracket, and a C-phase switch fixing bracket are installed on the crossbeam, and the A-phase, B-phase, and C-phase switch fixing brackets are spaced a certain distance apart, and the A-phase, B-phase, and C-phase switches are respectively installed on the A-phase, B-phase, and C-phase switch fixing brackets; the on-load switch operating mechanism box is connected to a crossbar via a transmission shaft and an adapter, and the crossbar is respectively connected to the A-phase switch, the B-phase switch, and the C-phase switch; the A-phase, B-phase, and C-phase windings on the high-voltage side of the transformer are respectively connected to the A-phase, B-phase, and C-phase switches via connecting cables.

2. According to claim 1, the 35kV dry-type transformer split-type on-load switch fixing device is characterized by: The operating mechanism box is arranged on the left or right side of the support frame, the A, B, C three-phase switches are arranged in parallel, and the A, B, C three-phase switches are arranged opposite to the A, B, C three-phase windings of the transformer.

3. The 35kV dry-type transformer split-type on-load switch fixing device according to claim 1 is characterized by: The column is equipped with a transfer platform bracket and an operating mechanism box bracket. The transfer platform bracket is equipped with a transfer joint between the transmission shaft and the crossbar by bolts, and the operating mechanism box is equipped with an operating mechanism box by bolts. A horizontal fixed base and a triangular reinforcement plate are welded at the lower end of the column, and the fixed base is fixed to the bottom plate of the transformer box or the ground foundation by bolts. When the fixed base is fixed to the ground foundation by embedded bolts, the transformer box has no bottom plate.

4. The 35kV dry-type transformer split-type on-load switch fixing device according to claim 1 is characterized in that: a plurality of lifting noses are welded on the crossbeam for moving the on-load switch fixing device by a crane.

5. According to claim 1, the 35kV dry-type transformer split-type on-load switch fixing device is characterized in that: the adapter between the vertical transmission shaft and the cross bar of the on-load switch includes a bevel gear fixed at the upper end of the transmission shaft and a bevel gear fixed at the end of the cross bar, the two bevel gears are meshed with each other, the two bevel gears are installed in the gear box body, and the gear box is installed on the adapter platform bracket through bolts; the operating mechanism of the on-load switch drives the transmission shaft to rotate, the transmission shaft drives the cross bar to rotate through the bevel gear, and the cross bar drives the A-phase switch, the B-phase switch, and the C-phase switch to operate.

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