Oil-immersed transformer tank with corrugated plate self-buffering shock insulation structure

Abstract

The present application relates to the field of transformer, especially to an oil-immersed transformer tank with corrugated plate self-buffering shock isolation structure, comprising a tank body, a base arranged at the bottom of the tank body, a fixing seat arranged on the base, a movable seat arranged between the base and the fixing seat, an elastic corrugated plate I arranged between the base and the movable seat, an elastic corrugated plate II arranged between the fixing seat and the movable seat, and a plurality of baffle plates arranged around the base, wherein the elastic corrugated plate I and the elastic corrugated plate II are in a wave shape along the radial direction, when the tank body is subjected to vertical load, the elastic corrugated plate I and the elastic corrugated plate II are stretched horizontally, the wave fluctuation amplitude is changed, and vertical elastic support is provided, when the tank is subjected to lateral impact force, the abutting beads I and II pull the wave crest section and the wave trough section to be stretched horizontally in two directions in the horizontal plane, the impact force is absorbed, and the tank body is kept in the vertical direction without changing the position.

Description

Technical Field

[0001] This invention relates to the field of transformers, and in particular to an oil-immersed transformer enclosure with a corrugated plate self-buffering and vibration isolation structure. Background Technology

[0002] Oil-immersed transformers are core equipment in power systems, and their operational stability is directly related to power grid safety. During operation, the magnetostriction of the iron core and the electromagnetic force of the windings can cause the transformer enclosure to vibrate. At the same time, external forces, such as earthquakes, wind loads or short-circuit electromagnetic forces, transportation bumps, and the lifting process of the enclosure, can also impact the enclosure.

[0003] To reduce the damage to the internal insulation structure and oil circuit of transformers caused by vibration and shock, a buffer isolation device is usually installed at the bottom of the transformer tank. This device uses a combination of helical compression springs and viscous dampers. However, the deformation mode of helical compression springs is mainly axial expansion and contraction, and their lateral shear stiffness is extremely low. When the tank is subjected to horizontal seismic forces or lateral short-circuit electrodynamic forces, the springs are unable to effectively buffer the lateral forces, resulting in large lateral displacement of the tank. Internal components such as leads and bushings are subjected to additional stress, posing a risk of insulation failure. Moreover, helical compression springs require a large free length and compression stroke to ensure elastic deformation space, and additional dampers are required to provide energy dissipation capacity. The springs and dampers are arranged in series or parallel in the vertical direction, which significantly increases the overall axial dimension of the isolation assembly. This forces a large installation gap to be maintained between the transformer tank and the mounting foundation, resulting in a larger overall tank volume and a higher center of gravity, which is detrimental to seismic stability. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides an oil-immersed transformer enclosure with a corrugated plate self-buffering vibration isolation structure.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an oil-immersed transformer enclosure with a corrugated plate self-buffering vibration isolation structure, comprising an enclosure body, a base disposed at the bottom of the enclosure body, a fixed seat disposed on the base, a movable seat disposed between the base and the fixed seat, an elastic corrugated plate I disposed between the base and the movable seat, an elastic corrugated plate II disposed between the fixed seat and the movable seat, and multiple sets of baffles disposed around the base; when the baffles are subjected to lateral impact, the elastic corrugated plate I or the elastic corrugated plate II are pulled to both sides to distribute the lateral impact force and keep the enclosure body from moving laterally.

[0006] As a preferred embodiment of the oil-immersed transformer housing with a corrugated plate self-buffering vibration isolation structure of the present invention, wherein: a movable cavity is provided on the base to cooperate with the movable seat; and an abutment block is provided at the bottom of the movable cavity to cooperate with the fixed seat.

[0007] As a preferred embodiment of the oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure of the present invention, wherein: a limiting slide plate is provided on the baffle, and connecting rod one and connecting rod two are slidably provided on two sets of baffles facing opposite directions.

[0008] As a preferred embodiment of the oil-immersed transformer housing with a corrugated plate self-buffering vibration isolation structure of the present invention, wherein: the base is further provided with a movable hole 1 that cooperates with connecting rod 1 and connecting rod 2; and the base is provided with a movable hole 2 that cooperates with the limiting slide plate.

[0009] As a preferred embodiment of the oil-immersed transformer housing with a corrugated plate self-buffering vibration isolation structure of the present invention, the fixed base is provided with a rotating groove, a turntable is rotatably provided on the rotating groove, a drive groove corresponding to the number of baffles is provided on the turntable, and the fixed base is also provided with a limiting slide groove that cooperates with the limiting slide plate, and the limiting slide groove is connected to the rotating groove.

[0010] As a preferred embodiment of the oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure of the present invention, wherein: a connecting column that matches the drive groove is provided on the limiting slide plate, and the connecting column slides in contact with the drive groove; there is an angle between the movement direction of the drive groove and the limiting slide plate.

[0011] As a preferred embodiment of the oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure of the present invention, wherein: the elastic corrugated plate is provided with multiple sets of crest sections and trough sections.

[0012] As a preferred embodiment of the oil-immersed transformer housing with a corrugated plate self-buffering vibration isolation structure of the present invention, wherein: the first elastic corrugated plate is further provided with a strip hole for cooperating with the first connecting rod and the second connecting rod; the second elastic corrugated plate has the same structure as the first elastic corrugated plate.

[0013] As a preferred embodiment of the oil-immersed transformer housing with a corrugated plate self-buffering vibration isolation structure of the present invention, the stretching directions of the first elastic corrugated plate and the second elastic corrugated plate are both corresponding to the movement direction of the limiting slide plate.

[0014] As a preferred embodiment of the oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure of the present invention, wherein: a plurality of sets of abutment beads are provided on the connecting rod, and the abutment beads abut against the middle of the inner wall of the crest section;

[0015] Multiple sets of abutment beads are provided on the connecting rod 2, and the abutment beads 2 abut against the middle of the outer wall of the trough section.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention uses the first and second elastic corrugated plates to form a wavy shape along the radial direction. When the box body is subjected to a vertical load, the first and second elastic corrugated plates are stretched laterally, and the amplitude of the corrugation changes, providing vertical elastic support. When the box body is subjected to a lateral impact force, the first and second abutment beads pull the crest and trough sections to be stretched laterally in both directions on the horizontal plane, absorbing the impact force while keeping the box body in a vertical position unchanged. At the same time, vertical elastic support and lateral buffering are achieved, eliminating the need to set up vertical springs and lateral limiting devices separately.

[0017] The movable seat is positioned between the first and second elastic corrugated plates. When the main body of the enclosure is impacted, causing the first and second elastic corrugated plates to undergo tensile deformation, sliding friction occurs between the contact surfaces of the first and second elastic corrugated plates and the base, fixed seat, and movable seat, forming Coulomb friction damping. At the same time, the materials of the first and second elastic corrugated plates themselves undergo strain hysteresis under the cyclic loading of the transformer's own weight and external impact force, forming material damping.

[0018] Since the equivalent working height of the first and second elastic corrugated plates in the axial and vertical directions depends only on the superposition of the corrugation height and the plate thickness, under the same vertical bearing capacity and design displacement conditions, the axial space occupied by the first and second elastic corrugated plates is much smaller than that of the helical compression spring that requires a larger free length. This allows the box body to be arranged closer to the fixed seat, reduces the overall center of gravity height of the box body, improves the anti-overturning stability, and avoids the overall volume of the box body from increasing.

[0019] The wavy curved surface of the first and second elastic corrugated plates disperses stress along the corrugated profile, eliminating the stress concentration phenomenon commonly found in flat plates or spring wires. Under cyclic vibration loads, the fatigue crack initiation life of the corrugated steel plate is better than that of the helical spring, thus extending the maintenance cycle of the vibration isolation components. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an oil-immersed transformer enclosure with a corrugated plate self-buffering and vibration isolation structure.

[0021] Figure 2 This is a schematic diagram of the base of an oil-immersed transformer enclosure with a corrugated plate self-buffering and vibration isolation structure.

[0022] Figure 3 This is a cross-sectional structural diagram of the base of an oil-immersed transformer enclosure with a corrugated plate self-buffering and vibration isolation structure.

[0023] Figure 4 This is a schematic diagram of the structure of an elastic corrugated plate in an oil-immersed transformer enclosure with a self-buffering and vibration-damping structure.

[0024] Figure 5 This is a schematic diagram of the limiting slide plate of an oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure.

[0025] Figure 6 This is a cross-sectional schematic diagram of the mounting base for an oil-immersed transformer enclosure with a corrugated plate self-buffering vibration isolation structure.

[0026] Figure 7 This is a schematic diagram of the connecting column of an oil-immersed transformer enclosure with a corrugated plate self-buffering vibration isolation structure.

[0027] Figure 8 This is a partial top view of the elastic corrugated plate of an oil-immersed transformer tank with a corrugated plate self-buffering and vibration isolation structure.

[0028] Figure 9 This is a partial bottom view of the elastic corrugated plate of an oil-immersed transformer tank with a corrugated plate self-buffering and vibration isolation structure.

[0029] Figure 10 This is a schematic diagram of the stress state of the trough section of an oil-immersed transformer enclosure with a corrugated plate self-buffering and vibration isolation structure.

[0030] In the diagram: 1. Box body; 2. Base; 21. Movable cavity; 22. Abutment block; 23. Movable hole one; 24. Movable hole two; 3. Fixed seat; 31. Rotating groove; 32. Turntable; 33. Drive groove; 34. Limiting slide groove; 4. Movable seat; 5. Elastic corrugated plate one; 51. Crest section; 52. Valley section; 53. Strip hole; 6. Elastic corrugated plate two; 7. Baffle; 71. Limiting slide plate; 711. Connecting column; 72. Connecting rod one; 73. Connecting rod two; 74. Abutment bead one; 75. Abutment bead two. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example, refer to Figures 1-10This embodiment of the invention provides an oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure, which includes a tank body 1, a base 2 disposed at the bottom of the tank body 1, a fixed seat 3 disposed on the base 2, a movable seat 4 disposed between the base 2 and the fixed seat 3, an elastic corrugated plate 5 disposed between the base 2 and the movable seat 4, an elastic corrugated plate 6 disposed between the fixed seat 3 and the movable seat 4, and multiple sets of baffles 7 disposed around the base 2; wherein, the tank body 1 is a conventional oil-immersed transformer tank, which contains the iron core, windings and insulating oil, and the base 2 is used to fix the bottom of the tank body 1 to provide support and connection. The fixed seat 3 is a concrete foundation or steel mounting base, fixed to the ground or substation platform by pre-embedded anchor bolts. The movable seat 4 is used to move up and down in the base 2 in conjunction with the deformation of the first elastic corrugated plate 5 and the second elastic corrugated plate 6. The first elastic corrugated plate 5 and the second elastic corrugated plate 6 are used to stretch and deform when subjected to impact, absorbing and buffering the impact force. The baffle 7 is used to receive lateral impact, and works with the fixed seat 3 to drive the first elastic corrugated plate 5 and the second elastic corrugated plate 6 to stretch and deform evenly in the lateral direction, absorbing the lateral impact. At the same time, in order to further increase the interlayer friction coefficient, the surfaces of the base 2, the fixed seat 3, and the movable seat 4 that contact the first elastic corrugated plate 5 or the second elastic corrugated plate 6 are treated to form rough surfaces, so that the interlayer friction coefficient is stabilized within a certain range, ensuring the predictability of the damping force.

[0033] When the baffle 7 is subjected to a lateral impact, the elastic corrugated plate 5 or the elastic corrugated plate 6 is pulled to both sides to distribute the lateral impact force and keep the main body of the box 1 from moving laterally. In this way, the position of the main body of the box 1 remains unchanged in the vertical direction, so that the overall center of gravity of the transformer does not shift and the internal components of the transformer are not affected.

[0034] The base 2 is provided with a movable cavity 21 that cooperates with the movable seat 4. The movable cavity 21 is used to accommodate the first elastic corrugated plate 5 and the second elastic corrugated plate 6.

[0035] The bottom of the movable cavity 21 is provided with an abutment block 22 that cooperates with the fixed seat 3. The abutment block 22 is used to abut against the fixed seat 3 to form a rigid limit. With the support of the first elastic corrugated plate 5 and the second elastic corrugated plate 6, the base 2 and the fixed seat 3 form a telescopic support body.

[0036] Among them, the baffle 7 is provided with a limiting slide plate 71, and the two sets of baffles 7 facing opposite directions are respectively provided with connecting rod 1 72 and connecting rod 2 73. The limiting slide plate 71 is used to cooperate with the fixed seat 3 to realize the limiting sliding of the baffle 7 relative to the fixed seat 3. The connecting rod 1 72 and connecting rod 2 73 are used to cooperate with the relative sliding of the baffle 7, and also cooperate with the height change of the elastic corrugated plate 1 5 and elastic corrugated plate 2 6 when they are stretched, so as to move up and down on the baffle 7.

[0037] The base 2 is also provided with a movable hole 23 for connecting rod 1 72 and connecting rod 2 73. The movable hole 23 is configured to accommodate the movement of connecting rod 1 72 and connecting rod 2 73.

[0038] The base 2 is provided with a second movable hole 24 that cooperates with the limiting slide plate 71. The second movable hole 24 is used to ensure that the limiting slide plate 71 can still slide back and forth on the fixed seat 3 when the base 2 moves up and down on the fixed seat 3.

[0039] The fixed base 3 is provided with a rotating groove 31, and a turntable 32 is rotatably mounted on the rotating groove 31. The turntable 32 is provided with a number of drive grooves 33 corresponding to the number of baffles 7. The fixed base 3 is also provided with a limiting slide groove 34 that cooperates with the limiting slide plate 71. The limiting slide groove 34 is connected to the rotating groove 31. The rotating groove 31 is used to accommodate the setting and rotation of the turntable 32, the drive groove 33 is used to cooperate with the turntable 32 to rotate, and the limiting slide groove 34 is used to limit the sliding of the limiting slide plate 71.

[0040] The limiting slide plate 71 is provided with a connecting post 711 that cooperates with the drive groove 33. The connecting post 711 slides in contact with the drive groove 33, and there is an angle between the drive groove 33 and the movement direction of the limiting slide plate 71. In this way, when the limiting slide plate 71 slides on the fixed base 3, the drive groove 33 and the connecting post 711 drive the turntable 32 to rotate, and then the drive groove 33 drives the other limiting slide plates 71 to slide, so as to realize the sliding linkage of all the limiting slide plates 71.

[0041] Among them, the elastic corrugated plate 5 is provided with multiple sets of crest sections 51 and trough sections 52. The crest sections 51 and trough sections 52 are connected end to end to form a wave-shaped elastic corrugated plate 5. The elastic corrugated plate 5 and the elastic corrugated plate 6 are stamped and formed by low yield point steel or weathering steel. When the elastic corrugated plate 5 and the elastic corrugated plate 6 are subjected to vertical or wave-direction impact force, the elastic corrugated plate 5 and the elastic corrugated plate 6 undergo tensile deformation along the wave direction to absorb the impact force.

[0042] The elastic corrugated plate 5 is also provided with a strip hole 53 for connecting rod 72 and connecting rod 73 to pass through the elastic corrugated plate 5.

[0043] The second elastic corrugated plate 6 and the first elastic corrugated plate 5 have the same structure. The stretching direction of the first elastic corrugated plate 5 and the second elastic corrugated plate 6 are both corresponding to the movement direction of the limiting slide plate 71. With this setting, when the limiting slide plate 71 is subjected to lateral impact, it can slide relative to the stretching direction of the first elastic corrugated plate 5 or the second elastic corrugated plate 6.

[0044] Among them, the connecting rod 72 is provided with multiple sets of abutting beads 74, and the abutting beads 74 abut against the middle of the inner wall of the crest section 51.

[0045] Multiple sets of abutment beads 75 are provided on the connecting rod 73. The abutment beads 75 abut against the middle of the outer wall of the trough section 52. With this design, when the limiting slide plate 71 is subjected to lateral impact, the limiting slide plate 71, under the action of the connecting column 711 and the drive groove 33, drives the two sets of baffles 7 in opposite directions to move closer to each other, so that the corresponding connecting rod 72 and connecting rod 73 slide alternately, and drives the abutment beads 74 and abutment beads 75 to move away from each other, and evenly pulls all the crest sections 51 and trough sections 52 to stretch, converting the lateral impact force into the force that drives the elastic corrugated plate 5 and elastic corrugated plate 6 to stretch. At this time, the base 2 drives the box body 1 to change only in the vertical direction.

[0046] In summary, when the transformer is subjected to a vertical impact force, the housing body 1 exerts a downward pressure on the first elastic corrugated plate 5 and the second elastic corrugated plate 6 through the base 2. At this time, the base 2, the fixed seat 3, and the movable seat 4 exert a uniform force on all the crest sections 51 and trough sections 52. The first elastic corrugated plate 5 and the second elastic corrugated plate 6 are stretched in the direction of the waves to absorb the vertical impact force. At this time, the crest sections 51 and trough sections 52 drive the first abutment bead 74 and the second abutment bead 75. Moving to both sides in the direction of the wave, at this time, connecting rod 1 72 and connecting rod 2 73 drive the limiting slide plate 71 to move in the direction of connecting rod 1 72 through the baffle 7. With the action of the drive groove 33 and the connecting column 711, the turntable 32 is driven to rotate, thereby driving all the baffles 7 to slide in the direction of the fixed seat 3. At this time, the box body 1 moves in the vertical direction. When the force disappears, the elastic corrugated plate 1 5 and elastic corrugated plate 2 6 return to their original positions under the action of elasticity, driving the box body 1 back to the initial state.

[0047] When the transformer is subjected to a lateral impact, the impact force acts on one or more sets of baffles 7. At this time, the corresponding limiting slide plate 71 is subjected to the lateral impact, causing the connecting column 711 to move towards the center of the turntable 32. Under the action of the drive groove 33, the connecting column 711 drives the turntable 32 to rotate. The turntable 32 then drives other connecting columns 711 to move towards the center of the turntable 32 through the drive groove 33. At this time, all the baffles 7 move closer to the center of the turntable 32 through the limiting slide plate 71, causing the corresponding connecting rod 1 72 and connecting rod 2 73 to slide alternately. The movement causes the first abutment bead 74 and the second abutment bead 75 to move away from each other, thereby evenly pulling all the crest sections 51 and trough sections 52 to stretch, converting the lateral impact force into a force that stretches the first elastic corrugated plate 5 and the second elastic corrugated plate 6. At this time, the height of the stretched first elastic corrugated plate 5 and the second elastic corrugated plate 6 decreases, and the base 2 causes the box body 1 to change only in the vertical direction. When the force disappears, the first elastic corrugated plate 5 and the second elastic corrugated plate 6 return to their original positions under the action of elasticity, causing the box body 1 to return to its initial state.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure, characterized in that: It includes a box body (1), a base (2) set at the bottom of the box body (1), a fixed seat (3) set on the base (2), a movable seat (4) set between the base (2) and the fixed seat (3), an elastic corrugated plate one (5) set between the base (2) and the movable seat (4), an elastic corrugated plate two (6) set between the fixed seat (3) and the movable seat (4), and multiple sets of baffles (7) set around the base (2); When the baffle (7) is subjected to lateral impact, the elastic corrugated plate one (5) or elastic corrugated plate two (6) is pulled to both sides to distribute the lateral impact force and keep the box body (1) from moving laterally.

2. The oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure as described in claim 1, characterized in that: The base (2) is provided with a movable cavity (21) that cooperates with the movable seat (4); The bottom of the movable cavity (21) is provided with an abutment block (22) that cooperates with the fixed seat (3).

3. The oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure as described in claim 1, characterized in that: A limit slide plate (71) is provided on the baffle (7), and connecting rod one (72) and connecting rod two (73) are slidably provided on the two sets of baffles (7) facing opposite directions.

4. The oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure as described in claim 3, characterized in that: The base (2) is also provided with a movable hole (23) for connecting rod 1 (72) and connecting rod 2 (73); The base (2) is provided with two movable holes (24) that cooperate with the limiting slide plate (71).

5. The oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure as described in claim 3, characterized in that: The fixed base (3) is provided with a rotating groove (31), and a turntable (32) is rotatably provided on the rotating groove (31). The turntable (32) is provided with a number of drive grooves (33) corresponding to the number of baffles (7). The fixed base (3) is also provided with a limiting slide groove (34) that cooperates with the limiting slide plate (71). The limiting slide groove (34) is connected to the rotating groove (31).

6. The oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure as described in claim 5, characterized in that: The limiting slide plate (71) is provided with a connecting post (711) that matches the drive groove (33), and the connecting post (711) slides in contact with the drive groove (33); There is an angle between the movement direction of the drive groove (33) and the limiting slide plate (71).

7. The oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure as described in claim 3, characterized in that: The elastic corrugated plate (5) is provided with multiple sets of crest sections (51) and trough sections (52).

8. The oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure as described in claim 7, characterized in that: The first elastic corrugated plate (5) is also provided with a strip hole (53) for cooperating with the first connecting rod (72) and the second connecting rod (73); The second type of elastic corrugated plate (6) and the first type of elastic corrugated plate (5) have the same structure.

9. The oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure as described in claim 7, characterized in that: The stretching directions of the first elastic corrugated plate (5) and the second elastic corrugated plate (6) are both corresponding to the movement direction of the limiting slide plate (71).

10. The oil-immersed transformer tank with a corrugated plate self-buffering vibration isolation structure as described in claim 7, characterized in that: Multiple sets of abutment beads (74) are provided on the connecting rod (72), and the abutment beads (74) abut against the middle of the inner wall of the crest section (51); Multiple sets of abutment beads (75) are provided on the connecting rod (73), and the abutment beads (75) abut against the middle of the outer wall of the trough section (52).

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