500kV three-phase interconnecting transformer with low-voltage insulation level of 220kV

Abstract

The invention discloses a 500kV three-phase interconnecting transformer with the low-voltage insulation level of 220kV, and relates to the technical field of transformers, the 500kV three-phase interconnecting transformer comprises a base, a three-phase interconnecting transformer body is arranged at the top of the base, two sliding grooves are formed in the bottom of the base, two moving seats are slidably connected in the two sliding grooves, and the two moving seats are arranged in the three-phase interconnecting transformer body. Four transverse mounting plates are fixedly connected to the bottoms of the two moving seats, and an adjusting mechanism used for adjusting the distance between the four transverse mounting plates is arranged in the base. According to the 500kV three-phase interconnecting transformer with the low-voltage insulation level of 220kV, a clamping installation mechanism convenient to regulate and control is arranged, a spline shaft serves as a core transmission part, and a meshing structure of a rotating sleeve and a second gear is matched, so that clamping regulation and control of single-shaft driving are achieved, and the problem that when two vertical fixing plates of an existing transformer are regulated and controlled to be close to each other and a mounting frame is clamped, clamping is not convenient is solved. Two second two-way threaded rods need to be rotated in sequence, operation is tedious, and the installation efficiency of the transformer is reduced.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically to a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV. Background Technology

[0002] In modern power systems, the 500kV voltage level serves as the core of the backbone transmission network. It needs to be interconnected and dispatched with the 220kV regional distribution network through interconnection transformers. The 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV has thus become a key device for connecting power grids across voltage levels, and its technical solutions have formed a mature industrial application system.

[0003] For example, a transformer with Chinese announcement number CN220272251U has the following description: "This utility model discloses a transformer, including a transformer body and a hollow base fixed to the bottom of the transformer body. The bottom of the hollow base is provided with two hollow plates, and a horizontal fixing plate is fixed to the bottom of the hollow plates. The bottom of the horizontal fixing plate is provided with two vertical fixing plates. The top of the hollow plates is fixed with two rectangular blocks. The rectangular blocks slide inside the hollow base. One end of the two rectangular blocks extending into the hollow base is fixed with a moving plate. The hollow base is provided with a drive assembly for simultaneously driving the two moving plates to move closer or further apart."

[0004] However, the existing devices have the following shortcomings during use: The existing transformer uses a first bidirectional screw to move a movable sleeve, which in turn moves a rotating shaft. When the shaft rotates, it causes the movable plate, hollow plate, and horizontal fixed plate to move closer or further apart. This allows the device to adjust the spacing between the two horizontal fixed plates according to the spacing between the external mounting brackets, thus enabling the transformer body to be installed on mounting brackets with different spacing. However, adjusting the two vertical fixed plates to move closer together and clamp the mounting bracket requires rotating two second bidirectional screws in sequence, which is cumbersome and reduces the installation efficiency of the transformer.

[0005] Therefore, we propose a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV. When the operator rotates the spline shaft, the spline shaft can synchronously drive two slidingly connected rotating sleeves to rotate. The rotating sleeves, through a second gear fixed on their outer surface, mesh with a second gear on a bidirectional lead screw, thereby driving the two bidirectional lead screws to rotate synchronously. When the bidirectional lead screws rotate, the four movable frames threaded on their outer surface will slide along the mounting groove, ultimately driving the four vertical mounting plates at the bottom to move closer or further apart synchronously. With the spline shaft as the core transmission component, and in conjunction with the meshing structure of the rotating sleeves and the second gear, single-axis drive clamping control is achieved, thus solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV, comprising a base, a three-phase interconnection transformer body disposed on the top of the base, two sliding grooves opened at the bottom of the base, two movable seats slidably connected in the two sliding grooves, four horizontal mounting plates fixedly connected to the bottom of the two movable seats, an adjustment mechanism for adjusting the distance between the four horizontal mounting plates disposed in the base, and a convenient adjustment clamping mounting mechanism disposed at the bottom of the base; The convenient adjustable clamping and mounting mechanism includes two fixed plates, with a splined shaft rotatably connected between the two fixed plates. Two mounting slots are formed at the bottom of the two movable seats, and two bidirectional lead screws are rotatably connected within the two mounting slots. Four movable frames are threaded onto the outer surfaces of the two bidirectional lead screws, and the four movable frames are slidably connected within the two mounting slots. Four vertical mounting plates are fixedly connected to the bottom of the four movable frames. Two rotating sleeves are rotatably connected within the two mounting slots, and the two rotating sleeves are slidably connected to the outer surfaces of the splined shaft. The four movable frames move through the two rotating sleeves. Four second gears are fixedly sleeved onto the outer surfaces of the two rotating sleeves and the two bidirectional lead screws, and the four second gears are meshed together.

[0008] Preferably, the adjustment mechanism includes a rotating shaft that is rotatably connected to the inside of the base.

[0009] Preferably, a first gear is fixedly sleeved on the outer surface of the rotating shaft, and two racks are provided inside the base.

[0010] Preferably, the two racks are meshed with the first gear, and the bottoms of the two racks are fixedly connected to the two movable seats.

[0011] Preferably, a worm gear is rotatably connected to the inner side of the base, and one end of the worm gear movably passes through the base and is fitted with a first rotating cap.

[0012] Preferably, a worm gear is fixedly sleeved on the outer surface of the rotating shaft, and the worm is meshed with the worm gear.

[0013] Preferably, the base has two limiting grooves on its inner side, and two limiting blocks are slidably connected in the two limiting grooves, with one side of each limiting block being fixedly connected to two racks.

[0014] Preferably, the two fixing plates are fixedly connected to the bottom of the base, and the surfaces of the four horizontal mounting plates and the four vertical mounting plates are all provided with mounting holes.

[0015] Preferably, one end of the spline shaft is movably inserted through one of the fixed plates, and a second rotating cap is installed at one end of the spline shaft.

[0016] Preferably, two pointers are mounted on the top of the two movable seats, and a scale is provided on one side of the base.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention features a convenient and adjustable clamping and mounting mechanism. When the operator rotates the splined shaft, the splined shaft synchronously drives two slidingly connected rotating sleeves to rotate. The rotating sleeves, through a second gear fixed on their outer surface, mesh with a second gear on a bidirectional lead screw, thereby driving the two bidirectional lead screws to rotate synchronously. When the bidirectional lead screws rotate, the four movable brackets threaded on their outer surface slide along the mounting groove, ultimately causing the four vertical mounting plates at the bottom to move closer or further apart synchronously. With the splined shaft as the core transmission component, combined with the meshing structure of the rotating sleeve and the second gear, single-axis drive clamping and control are achieved. This solves the problem that existing transformer installations require rotating two second bidirectional threaded rods sequentially to bring the two vertical fixed plates closer together and clamp the mounting brackets, which is cumbersome and reduces transformer installation efficiency.

[0018] 2. This invention utilizes an adjustment mechanism with a worm gear and worm wheel as the core of the transmission, possessing both self-locking and speed-reducing torque-increasing characteristics. When the operator rotates the first rotating cap to rotate the worm gear, the worm gear drives the rotating shaft to rotate through meshing with the worm wheel. The first gear on the outer surface of the rotating shaft rotates accordingly and, through meshing with two racks, drives the two racks to slide synchronously in opposite directions along the inner side of the base. The cooperation of the limiting groove and the limiting block ensures the stability of the rack sliding. The movable seat fixed at the bottom of the rack moves with the rack, thereby driving the four horizontal mounting plates at the bottom to adjust their spacing synchronously. At the same time, the pointer on the top of the movable seat and the scale on the side of the base form a visual adjustment reference. The operator can accurately control the spacing of the horizontal mounting plates through the scale value pointed to by the pointer, avoiding errors and ensuring that the horizontal mounting plates can accurately adapt to mounting frames with different spacings, thus improving installation accuracy and stability. Attached Figure Description

[0019] Figure 1This is a perspective view of the main structure of a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to the present invention. Figure 2 This is a three-dimensional view of the left side structure of a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to the present invention. Figure 3 This is a perspective view of the bottom structure of a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to the present invention. Figure 4 This is a perspective view of the rear structure of a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to the present invention. Figure 5 This is a partial sectional perspective view of the base of a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to the present invention. Figure 6 This is a perspective view of the unfolded structure of the splined shaft, moving frame, and moving base in a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to the present invention. Figure 7 This is a partial sectional perspective view of the movable base in a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to the present invention. Figure 8 This invention relates to a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV. Figure 3 Enlarged 3D view of the structure at point A in the middle.

[0020] In the diagram: 1. Base; 2. Three-phase interconnection transformer body; 3. Slide groove; 4. Movable seat; 5. Horizontal mounting plate; 6. Adjustment mechanism; 601. Rotating shaft; 602. First gear; 603. Rack; 604. Worm gear; 605. First rotating cap; 606. Worm wheel; 607. Limiting groove; 608. Limiting block; 7. Convenient adjustable clamping mounting mechanism; 701. Fixing plate; 702. Splined shaft; 703. Mounting groove; 704. Two-way lead screw; 705. Movable frame; 706. Vertical mounting plate; 707. Rotating sleeve; 708. Second gear; 709. Mounting hole; 710. Second rotating cap; 8. Pointer; 9. Scale. Detailed Implementation

[0021] 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.

[0022] like Figures 1-8As shown, the present invention provides a technical solution: a 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV, including a base 1, a three-phase interconnection transformer body 2 is provided on the top of the base 1, two sliding grooves 3 are opened at the bottom of the base 1, two movable seats 4 are slidably connected in the two sliding grooves 3, four horizontal mounting plates 5 are fixedly connected to the bottom of the two movable seats 4, an adjustment mechanism 6 for adjusting the distance between the four horizontal mounting plates 5 is provided in the base 1, and a convenient adjustment clamping mounting mechanism 7 is provided at the bottom of the base 1. The convenient adjustable clamping and mounting mechanism 7 includes two fixed plates 701, with a splined shaft 702 rotatably connected between them. Two mounting slots 703 are formed at the bottom of the two movable seats 4. Two bidirectional lead screws 704 are rotatably connected within the mounting slots 703. Four movable frames 705 are threaded onto the outer surfaces of the two bidirectional lead screws 704. The four movable frames 705 are slidably connected within the mounting slots 703. Four vertical mounting plates 706 are fixedly connected to the bottom of the four movable frames 705. Two rotating sleeves 707 are rotatably connected within the mounting slots 703. The two rotating sleeves 707 are slidably connected to the outer surfaces of the splined shaft 702, and the four movable frames 705 move through the two rotating sleeves 707. Four second gears 708 are fixedly sleeved on the outer surfaces of the two rotating sleeves 707 and the two bidirectional lead screws 704, and the four second gears 708 are meshed together.

[0023] like Figure 1 and Figure 5 As shown, the adjustment mechanism 6 includes a rotating shaft 601, which is rotatably connected to the inner side of the base 1. By rotatably connecting the rotating shaft 601 to the inner side of the base 1, it is ensured that the rotating shaft 601 can rotate stably when driven by force, avoiding problems such as deviation and jamming.

[0024] like Figure 1 and Figure 5 As shown, the outer surface of the rotating shaft 601 is fixedly sleeved with the first gear 602, and two racks 603 are provided inside the base 1. By rotating the rotating shaft 601 to the inner side of the base 1, it is ensured that the rotating shaft 601 can rotate stably when driven by force, avoiding problems such as deviation and jamming. As a component connecting the worm gear 606 and the first gear 602, it provides support for the subsequent transmission chain and ensures the continuity of power transmission of the adjustment mechanism 6.

[0025] like Figure 1 , Figure 4 and Figure 5As shown, two racks 603 are meshed with the first gear 602. The bottom of the two racks 603 is fixedly connected to the two movable seats 4. The meshing connection ensures that the rotational power of the first gear 602 can be efficiently transmitted to the racks 603, reducing power loss. The fixed connection between the racks 603 and the movable seats 4 allows the linear motion of the racks 603 to be directly converted into the sliding of the movable seats 4, thereby driving the horizontal mounting plate 5 to adjust the spacing.

[0026] like Figure 1 and Figure 5 As shown, a worm gear 604 is rotatably connected to the inner side of the base 1. One end of the worm gear 604 passes through the base 1 and is fitted with a first rotating cap 605. When the operator rotates the first rotating cap 605, the worm gear 604 can drive the worm wheel 606 to rotate without applying excessive force, thus reducing the intensity of operation. At the same time, the fact that one end of the worm gear 604 passes through the base 1 and is fitted with the first rotating cap 605 provides the operator with a convenient external operating point and improves the ease of adjusting the spacing of the horizontal mounting plate 5.

[0027] like Figure 1 and Figure 5 As shown, a worm gear 606 is fixedly sleeved on the outer surface of the rotating shaft 601. The worm 604 is meshed with the worm gear 606. The transmission structure formed by the worm gear 606 and the worm 604 has a self-locking characteristic. The worm gear 606 cannot drive the worm 604 in the reverse direction. This ensures that after the spacing of the horizontal mounting plate 5 is adjusted to the correct position, even if it is subjected to external forces such as vibration of the three-phase interconnection transformer body 2 during operation or power grid fluctuations, the spacing will not shift on its own, thus ensuring the stability after installation. At the same time, the fixed connection between the worm gear 606 and the rotating shaft 601 ensures that the power of the worm 604 can be accurately transmitted to the rotating shaft 601, providing stable power for the subsequent drive of the rack 603.

[0028] like Figure 1 and Figure 5 As shown, two limiting grooves 607 are provided on the inner side of the base 1. Two limiting blocks 608 are slidably connected in the two limiting grooves 607, and one side of the two limiting blocks 608 is fixedly connected to the two racks 603. The cooperation between the limiting grooves 607 and the limiting blocks 608 provides guidance and constraint for the sliding of the racks 603, avoiding problems such as lateral deviation and tilting of the racks 603 when they mesh with the first gear 602, and ensuring that the racks 603 always move in a straight line along the preset trajectory. At the same time, the fixed connection between the limiting blocks 608 and the racks 603 can distribute the force on the racks 603 when they slide, reduce the deformation of the racks 603 caused by unilateral force, extend the service life of the racks 603, and further ensure the stability and accuracy of the transmission of the adjustment mechanism 6.

[0029] like Figure 1 and Figure 6As shown, two fixing plates 701 are fixedly connected to the bottom of the base 1. The surfaces of the four horizontal mounting plates 5 and the four vertical mounting plates 706 are all provided with mounting holes 709. The fixing plates 701 are fixed to the bottom of the base 1, providing a stable support structure for the spline shaft 702. This ensures that the spline shaft 702 will not wobble when rotating, and guarantees the transmission stability of the clamping mounting mechanism 7. The mounting holes 709 on the surfaces of the horizontal mounting plates 5 and the vertical mounting plates 706 provide standardized connection points for fixing the three-phase interconnection transformer body 2 to the external mounting frame. Operators can quickly fix the three-phase interconnection transformer body 2 to the mounting frame by passing bolts or other connectors through the mounting holes 709, which improves the stability and efficiency of the installation.

[0030] like Figure 1 and Figure 6 As shown, one end of the spline shaft 702 is movably inserted through one of the fixed plates 701. A second rotating cap 710 is installed at one end of the spline shaft 702. By having the spline shaft 702 pass through the fixed plate 701 and the second rotating cap 710 installed, a convenient external drive point is provided for the convenient adjustment of the clamping and mounting mechanism 7. On the one hand, the fixed plate 701 provides support and limit for the spline shaft 702, preventing axial displacement when the spline shaft 702 rotates. On the other hand, the operator can drive the spline shaft 702 to rotate by rotating the second rotating cap 710 without the need for special tools. This simplifies the operation process of clamping and adjusting the vertical mounting plate 706 and further improves the ease of installation of the three-phase interconnection transformer body 2.

[0031] like Figure 1 As shown, two pointers 8 are installed on the top of the two movable seats 4, and a scale 9 is set on one side of the base 1. The combination of pointers 8 and scale 9 constructs a visual adjustment reference system. When the operator adjusts the spacing of the horizontal mounting plates 5, the pointers 8 on the top of the movable seats 4 can point to the scale 9 on the side of the base 1 to directly read the real-time spacing value of the horizontal mounting plates 5. This avoids installation rework caused by spacing errors. At the same time, the precise scale 9 reference can ensure consistency when different operators adjust, improve installation accuracy, and enable the three-phase interconnection transformer body 2 to adapt to mounting frames with different spacing requirements, thus broadening the application scenarios.

[0032] The usage and working principle of this device: During the horizontal spacing adjustment stage, the operator first observes the scale 9 on one side of the base 1. According to the horizontal spacing requirements of the external mounting bracket, the operator rotates the first rotating cap 605 of the adjustment mechanism 6. As the first rotating cap 605 rotates, the worm 604 rotates synchronously and drives the worm wheel 606 to rotate, which in turn drives the rotating shaft 601 and the first gear 602 on the outer surface to rotate. The first gear 602 meshes with the two racks 603, pushing the two racks 603 to slide synchronously in the opposite direction along the limiting groove 607 on the inner side of the base 1. The movable seat 4 fixed at the bottom of the rack 603 slides along the slide groove 3 with the rack 603. The pointer 8 on the top of the movable seat 4 points to the scale 9. The operator adjusts to the target spacing according to the reading of the pointer 8 to complete the horizontal spacing adaptation of the four horizontal mounting plates 5. During the vertical clamping and fixing adjustment stage, after the horizontal spacing is adapted, the four horizontal mounting plates 5 are installed on the external mounting frame. Then, the operator rotates the second rotating cap 710 of the convenient adjustable clamping and mounting mechanism 7, which drives the spline shaft 702 to rotate. The two rotating sleeves 707 slidably connected to the outer surface of the spline shaft 702 rotate synchronously with the spline shaft 702. The second gear 708 fixed on the outer surface of the rotating sleeve 707 meshes with the second gear 708 on the outer surface of the double-acting screw 704, driving the two double-acting screws 704 to rotate synchronously in the mounting groove 703. The four movable frames 705 threadedly connected to the outer surface of the double-acting screw 704 slide along the mounting groove 703, driving the four vertical mounting plates 706 at the bottom to move closer to each other synchronously until the vertical mounting plates 706 are tightly against the side of the external mounting frame. Finally, the operator uses bolts to fix the device to the mounting frame through the mounting holes 709 on the surfaces of the horizontal mounting plates 5 and the vertical mounting plates 706, completing the overall installation. In the subsequent adjustment stage, if it is necessary to change the installation position or adjust the mounting bracket, the first rotating cap 605 can be rotated in the opposite direction to increase the spacing of the horizontal mounting plates 5, and the second rotating cap 710 can be rotated in the opposite direction to make the vertical mounting plates 706 move away from each other. Repeating the above steps can complete the refit and fixation.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV, characterized in that, Includes a base (1), a three-phase interconnection transformer body (2) is provided on the top of the base (1), two sliding grooves (3) are opened at the bottom of the base (1), two movable seats (4) are slidably connected in the two sliding grooves (3), four horizontal mounting plates (5) are fixedly connected to the bottom of the two movable seats (4), an adjustment mechanism (6) for adjusting the distance between the four horizontal mounting plates (5) is provided in the base (1), and a convenient adjustment clamping mounting mechanism (7) is provided at the bottom of the base (1). The convenient adjustable clamping and mounting mechanism (7) includes two fixed plates (701), with a splined shaft (702) rotatably connected between the two fixed plates (701). Two mounting slots (703) are opened at the bottom of the two movable seats (4). Two bidirectional lead screws (704) are rotatably connected within the two mounting slots (703). Four movable frames (705) are threaded onto the outer surfaces of the two bidirectional lead screws (704). The four movable frames (705) are slidably connected within the two mounting slots (703). The bottom of the movable frame (705) is fixedly connected to four vertical mounting plates (706). Two rotating sleeves (707) are rotatably connected in the two mounting slots (703). The two rotating sleeves (707) are slidably connected to the outer surface of the spline shaft (702). The four movable frames (705) move through the two rotating sleeves (707). The outer surfaces of the two rotating sleeves (707) and the two bidirectional lead screws (704) are fixedly sleeved with four second gears (708). The four second gears (708) are meshed together.

2. A 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to claim 1, characterized in that: The adjustment mechanism (6) includes a rotating shaft (601) which is rotatably connected to the inside of the base (1).

3. A 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to claim 2, characterized in that: The outer surface of the rotating shaft (601) is fixedly fitted with a first gear (602), and two racks (603) are provided inside the base (1).

4. A 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to claim 3, characterized in that: The two racks (603) are meshed with the first gear (602), and the bottom of the two racks (603) are fixedly connected to the two movable seats (4).

5. A 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to claim 4, characterized in that: The inner side of the base (1) is rotatably connected to a worm gear (604), one end of which movably passes through the base (1) and is fitted with a first rotating cap (605).

6. A 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to claim 5, characterized in that: A worm gear (606) is fixedly sleeved on the outer surface of the rotating shaft (601), and the worm (604) is meshed with the worm gear (606).

7. A 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to claim 3, characterized in that: The base (1) has two limiting grooves (607) on its inner side, and two limiting blocks (608) are slidably connected in the two limiting grooves (607), and one side of the two limiting blocks (608) is fixedly connected to two racks (603).

8. A 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to claim 1, characterized in that: The two fixing plates (701) are fixedly connected to the bottom of the base (1), and the surfaces of the four horizontal mounting plates (5) and the four vertical mounting plates (706) are all provided with mounting holes (709).

9. A 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to claim 1, characterized in that: One end of the spline shaft (702) is movably inserted through one of the fixed plates (701), and a second rotating cap (710) is installed at one end of the spline shaft (702).

10. A 500kV three-phase interconnection transformer with a low-voltage insulation level of 220kV according to claim 1, characterized in that: Two pointers (8) are mounted on the top of the two movable seats (4), and a scale (9) is provided on one side of the base (1).

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