A combined transformer with stable installation

Abstract

The present application relates to the technical field of combined mutual inductor, in particular to a combined mutual inductor with stable installation, which comprises a combined mutual inductor body and a support frame arranged below the combined mutual inductor body, and further comprises: a rotating support assembly arranged on the support frame and used for rotatingly supporting the combined mutual inductor body; an angle adjusting structure comprising a plurality of fixing seats arranged below the combined mutual inductor body and a positioning unit used for positioning the positions of the fixing seats, and a first support ball rotatably connected to one end of the fixing seat away from the positioning unit, a lead screw fixedly connected to the first support ball, a second support ball with a threaded connection arranged outside the lead screw, a support seat rotatably arranged outside the second support ball, and a plug-in locking mechanism arranged on the support frame and used for locking the position of the support seat; the combined mutual inductor body can be accurately leveled in multiple dimensions, so that the electric field force line distribution inside the combined mutual inductor body is most uniform and most reasonable, the initial installation quality is improved, and convenient post-maintenance is provided.

Description

Technical Field

[0001] This invention relates to the field of combined current transformer technology, and more particularly to a combined current transformer that is stably installed. Background Technology

[0002] In power systems, the verticality of the installation of combined instrument transformers is the lifeline for their long-term stable and accurate operation. Improper installation may cause slight changes in the permeability of the iron core inside the combined instrument transformer, or affect the capacitive coupling between windings, thereby introducing additional phase errors or ratio errors. In the current technology, when installing combined instrument transformers on the angle steel crossarm or support frame of the pole, the mainstream installation method relies on the experience of the construction personnel. Usually, the support is roughly fixed first, and then the combined instrument transformer is placed on it. By observing the spirit level, metal shims of different thicknesses are manually inserted into the gap between the base and the support to achieve leveling.

[0003] However, it is worth considering that the leveling accuracy of manual shims is relatively low. Even a slight tilt can cause electric field distortion, resulting in electric field concentration at weak points in the insulation. Under long-term effects, this can lead to partial discharge, continuous erosion of the insulation material, and eventually insulation breakdown under voltage surges, or even equipment explosion.

[0004] Therefore, in order to solve the above problems, a more suitable facility that meets the needs of users is needed. Summary of the Invention

[0005] In view of this, the purpose of this invention is to propose a stable combined transformer to solve the problem that the leveling accuracy of manual shims is low, and even a slight tilt can cause electric field distortion and electric field concentration at weak insulation points.

[0006] To achieve the above objectives, the present invention provides a stable-installation combined current transformer, comprising a combined current transformer body and a support frame disposed below the combined current transformer body, and further comprising: A rotating support assembly is provided on the support frame for rotating and supporting the combined current transformer body; The angle adjustment structure includes several fixed seats disposed below the combined current transformer body and a positioning unit for positioning the fixed seats. A first support ball is rotatably connected to the end of the fixed seat away from the positioning unit. A lead screw is fixedly connected to the first support ball. A second support ball with a threaded connection is sleeved on the outside of the lead screw. A support seat is rotatably sleeved on the outside of the second support ball. A plug-in locking mechanism for locking the position of the support seat is provided on the support frame.

[0007] Optionally, the rotating support assembly includes a fixed block disposed above the support frame, a third support ball rotatably connected to the fixed block, and the third support ball being fixedly connected to the bottom end of the combined current transformer body. A first U-shaped plate is sleeved on the outside of the fixed block, and the first U-shaped plate is fixedly connected to the support frame. A first limiting groove is provided on the fixed block, and a first limiting strip is slidably disposed in the first limiting groove, and the first limiting strip is fixedly connected to the first U-shaped plate. The support frame is provided with a plug-in mechanism adapted to the fixed block.

[0008] Optionally, the insertion mechanism includes a fixed shaft disposed below the support frame, a plug block fixedly connected to the top end of the fixed shaft, the plug block penetrating the support frame, a first slot that mates with the plug block being opened at the bottom of the fixed block, and the top end of the plug block being located in the first slot, and an elastic element that mates with the fixed shaft being installed on the support frame.

[0009] Optionally, the elastic element includes at least one fixed frame fixedly installed on the top of the support frame, a movable column is provided below the fixed frame, the movable column passes through the support frame, the bottom end of the movable column is fixedly connected to the fixed shaft, a groove is provided on the top of the movable column, a support column is slidably arranged in the groove, the bottom end of the support column and the bottom of the inner wall of the groove are connected by a tension spring, and the top end of the support column is fixedly connected to the fixed frame.

[0010] Optionally, the positioning unit includes several fixing plates fixedly installed on the bottom of the combined current transformer body. The fixing plates are provided with positioning grooves, and positioning blocks are provided in the positioning grooves. The positioning blocks and the fixing seats are fixedly connected, and the fixing plates are located on the side of the fixing seats away from the first support ball.

[0011] Optionally, a first bolt passes through the support base, and a threaded groove that mates with the first bolt is provided on the second support ball.

[0012] Optionally, the plug-in locking mechanism includes a second U-shaped plate sleeved on the outside of the support base, a second limiting groove is provided on the support base, a second limiting strip is slidably provided in the second limiting groove, and the second limiting strip and the second U-shaped plate are fixedly connected. A second slot is provided at the bottom of the support base, and a number of plug plates pass through the support frame. The top of the plug plates is located in the corresponding second slot, and a stopper that cooperates with the plug plates is installed on the support frame.

[0013] Optionally, the stopper includes an iron plate fixedly mounted on the insert plate, the iron plate being located below the support frame, a magnet block being provided in contact with the top of the iron plate, the magnet block being fixedly connected to the support frame, a rotating frame being rotatably sleeved on the outside of the fixed shaft, and the bottom of the iron plate being in contact with the top of the rotating frame, and a stopper cooperating with the rotating frame being installed on the support frame.

[0014] Optionally, the stop includes several second bolts disposed below the combined transformer body, the second bolts passing through the support frame and the rotating frame, and a nut located below the rotating frame is sleeved on the outside of the second bolts.

[0015] Optionally, the bottom of the insert plate is provided with a sliding groove, and a sliding plate is slidably disposed in the sliding groove. The bottom end of the sliding plate and the support frame are fixedly connected by a support plate.

[0016] The beneficial effects of this invention are as follows: The operator releases the locking mechanism of the support base, drives the support base and fixed base to move, causing the fixed base to disengage from the positioning unit, thus releasing the locking of the combined current transformer body angle. The operator then drives the combined current transformer body to rotate relative to the support frame, ensuring the combined current transformer body is perpendicular to the horizontal plane. Another operator then drives the lead screw to rotate relative to the second support ball, changing the initial distance between the first and second support balls. The operator then drives the fixed base to rotate relative to the first support ball, aligning it with the positioning unit again. The operator also drives the support base to rotate relative to the second support ball, aligning it with the locking mechanism. The positioning unit positions the fixed base, and the locking mechanism locks the support base. This allows the bottom of the combined current transformer body to be supported again by several lead screws, maintaining the combined current transformer body in a fixed state relative to the support frame. The first and second support balls can no longer rotate freely; their degrees of freedom are completely eliminated. The lead screw is no longer just an adjustment unit, but a reinforcing rib in this rigid whole. They provide support, resist long-term vibration and potential deformation, forming a stable whole and ensuring that the combined transformer body is perpendicular to the horizontal plane, without any abnormal electric field concentration points. The magnetic circuits and windings of the current and voltage transformers are symmetrically designed. Vertical installation ensures the symmetry and stability of their electromagnetic characteristics, achieving multi-dimensional precise leveling to make the electric field lines inside the combined transformer body most uniform and reasonable. If the tower tilts slightly or the foundation changes in the future, maintenance personnel do not need to disassemble the equipment. They only need to release the locking of the support seat through the plug-in locking mechanism, remove the lead screw, make fine adjustments again, and lock it again. This greatly reduces the maintenance cost throughout the entire life cycle, improves the initial installation quality, and provides convenient later maintenance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is one of the overall structural schematic diagrams of an embodiment of the present invention; Figure 2 This is a second schematic diagram of the overall structure of an embodiment of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram of region A in the middle; Figure 4 This is a schematic diagram of the positioning unit in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the bottom of the support base according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the support frame structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the disassembled insert plate and slide plate according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the bottom structure of the fixing block in an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the elastic element in an embodiment of the present invention.

[0019] The diagram is marked as follows: 1. Combined current transformer body; 2. Support frame; 3. Fixing seat; 4. First support ball; 5. Lead screw; 6. Second support ball; 7. Support seat; 8. Fixing block; 9. Third support ball; 10. First U-shaped plate; 11. First limiting strip; 12. First limiting groove; 13. Insert block; 14. Fixing shaft; 15. Movable column; 16. Groove; 17. Support column; 18. Tension spring; 19. Fixing frame; 20. Fixing plate; 21. Positioning groove; 22. Positioning block; 23. First bolt; 24. Threaded groove; 25. Second U-shaped plate; 26. Second limiting strip; 27. Second limiting groove; 28. Insert plate; 29. ​​First slot; 30. Support plate; 31. Slide plate; 32. Second slot; 33. Iron plate; 34. Magnet block; 35. Rotating frame; 36. Second bolt; 37. Nut; 38. Slide groove. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0021] Example 1, by Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The present invention includes a combined current transformer body 1 and a support frame 2 disposed below the combined current transformer body 1, and further includes: A rotating support assembly is mounted on the support frame 2 for rotating and supporting the combined current transformer body 1; The angle adjustment structure includes several fixed seats 3 located below the combined current transformer body 1 and positioning units for positioning the fixed seats 3. A first support ball 4 is rotatably connected to the end of the fixed seat 3 away from the positioning unit. A lead screw 5 is fixedly connected to the first support ball 4. A threaded second support ball 6 is sleeved on the outside of the lead screw 5. A support seat 7 is rotatably sleeved on the outside of the second support ball 6. The support frame 2 is equipped with a plug-in locking mechanism for locking the position of the support seat 7. After the operator fixes the support frame 2 onto the tower, the operator releases the locking of the support seat 7 through the plug-in locking mechanism. The operator then drives the support seat 7 and... The fixed base 3 moves to disengage from the positioning unit, releasing the locking position on the angle of the combined current transformer body 1. The operator drives the combined current transformer body 1 to rotate relative to the support frame 2, ensuring that the combined current transformer body 1 is perpendicular to the horizontal plane. Then, another operator drives the lead screw 5 to rotate relative to the second support ball 6, changing the initial distance between the first support ball 4 and the second support ball 6. Then, the operator drives the fixed base 3 to rotate relative to the first support ball 4, so that the fixed base 3 is aligned with the positioning unit again. The operator also drives the support base 7 to rotate relative to the second support ball 6, so that the support base 7 is aligned with the plug-in locking mechanism. The position of the fixed base 3 is positioned by the positioning unit, and the position of the support base 7 is locked by the plug-in locking mechanism. Then, the bottom end of the combined current transformer body 1 is supported again by several lead screws 5, keeping the combined current transformer body 1 fixed relative to the support frame 2. The first support ball 4 and the second support ball 6 can no longer rotate freely; their degrees of freedom are completely eliminated. The lead screws 5 are no longer merely adjustment units, but also reinforcing ribs in this rigid whole. They provide support force, resist long-term vibration and potential deformation, forming a stable whole and ensuring that the combined current transformer body 1 is perpendicular to the horizontal. There will be no abnormal electric field concentration points. The magnetic circuits and windings of the current and voltage transformers are symmetrically designed. Vertical installation can ensure the symmetry and stability of their electromagnetic characteristics and achieve multi-dimensional precise leveling. This makes the electric field lines inside the combined transformer body 1 the most uniform and reasonable. If the tower tilts slightly or the foundation changes in the future, the maintenance personnel do not need to disassemble the equipment. They only need to release the lock of the support seat 7 through the plug-in locking mechanism, remove the lead screw 5, make fine adjustments again, and lock it again. This greatly reduces the maintenance cost throughout the entire life cycle, improves the initial installation quality, and provides convenient later maintenance.

[0022] Example 2, based on Example 1, is... Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 8 and Figure 9The rotating support assembly includes a fixed block 8 disposed above the support frame 2. A third support ball 9 is rotatably connected to the fixed block 8, and the third support ball 9 is fixedly connected to the bottom end of the combined current transformer body 1. A first U-shaped plate 10 is sleeved on the outside of the fixed block 8, and the first U-shaped plate 10 is fixedly connected to the support frame 2. A first limiting groove 12 is provided on the fixed block 8, and a first limiting strip 11 is slidably disposed in the first limiting groove 12, and the first limiting strip 11 is fixedly connected to the first U-shaped plate 10. The support frame 2 is provided with a plug-in mechanism adapted to the fixed block 8. The plug-in mechanism includes a fixed shaft 14 disposed below the support frame 2, and a plug block 13 is fixedly connected to the top end of the fixed shaft 14. The bottom of the fixed block 8, which passes through the support frame 2, is provided with a first slot 29 that mates with the insert block 13, and the top of the insert block 13 is located in the first slot 29. An elastic element that mates with the fixed shaft 14 is installed on the support frame 2. The elastic element includes at least one fixed frame 19 that is fixedly installed on the top of the support frame 2. A movable column 15 is provided below the fixed frame 19. The movable column 15 passes through the support frame 2. The bottom end of the movable column 15 is fixedly connected to the fixed shaft 14. A groove 16 is provided on the top of the movable column 15. A support column 17 is slidably provided in the groove 16. The bottom end of the support column 17 and the bottom of the inner wall of the groove 16 are connected by a tension spring 18. The top end of the support column 17 is fixedly connected to the fixed frame 19. When the fixed seat 3 disengages from the positioning unit and releases the locking position of the combined current transformer body 1, the operator can drive the combined current transformer body 1 and the third support ball 9 to rotate relative to the fixed block 8, changing the angle of the combined current transformer body 1 so that the combined current transformer body 1 is perpendicular to the horizontal plane. When it is necessary to remove the combined current transformer body 1 from the support frame 2, the operator drives the fixed shaft 14 and the plug 13 to move down. The fixed shaft 14 drives the movable column 15 to move down relative to the support column 17, and the tension spring 18 is in a stretched state, so that the plug 13 disengages from the first slot 29, releasing the positioning of the fixed block 8. The operator drives the combined current transformer body 1, the third support ball 9 and the fixed block 8 to translate relative to the support frame 2. The first slot 29 is no longer located above the plug 13, and the first limiting strip 11 disengages from the first limiting groove 12, so that the combined current transformer body 1 can be removed from the support frame 2.

[0023] Example 3, based on Example 2, by Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 9The positioning unit includes several fixing plates 20 fixedly installed on the bottom of the combined transformer body 1. The fixing plates 20 have positioning grooves 21, and positioning blocks 22 are provided within the positioning grooves 21. The positioning blocks 22 are fixedly connected to the fixing seat 3, and the fixing plates 20 are located on the side of the fixing seat 3 away from the first support ball 4. A first bolt 23 passes through the support seat 7, and a threaded groove 24 that mates with the first bolt 23 is provided on the second support ball 6. The plug-in locking mechanism includes a second U-shaped plate 25 sleeved on the outside of the support seat 7. A second limiting groove 27 is provided on the support seat 7, and a second limiting strip 26 slides within the second limiting groove 27. The second limiting strip 26 is fixedly connected to the second U-shaped plate 25. A second slot 32 is provided at the bottom of the support seat 7, and several insert plates 28 pass through the support frame 2. The tops of the insert plates 28 are located within the corresponding second slots 32. The support frame 2 is equipped with a stopper that cooperates with the insert plate 28. The stopper includes an iron plate 33 fixedly installed on the insert plate 28. The iron plate 33 is located below the support frame 2. The top of the iron plate 33 is in contact with a magnet block 34. The magnet block 34 and the support frame 2 are fixedly connected. The fixed shaft 14 is externally rotatably fitted with a rotating frame 35. The bottom of the iron plate 33 and the top of the rotating frame 35 are in contact. The support frame 2 is equipped with a stopper that cooperates with the rotating frame 35. The stopper includes several second bolts 36 located below the combined transformer body 1. The second bolts 36 pass through the support frame 2 and the rotating frame 35. The outside of the second bolts 36 is fitted with a nut 37 located below the rotating frame 35. The bottom of the insert plate 28 is provided with a sliding groove 38. A sliding plate 31 is slidably installed in the sliding groove 38. The bottom end of the sliding plate 31 and the support frame 2 are fixedly connected through a support plate 30. The operator drives the nut 37 to rotate, causing it to disengage from the second bolt 36, thus releasing the restriction on the position of the second bolt 36. The operator then drives the second bolt 36 upward, disengaging it from the rotating frame 35, thereby releasing the restriction on the position of the rotating frame 35. The operator then drives the rotating frame 35 to rotate relative to the fixed axis 14, so that the rotating frame 35 is no longer directly below the iron plate 33, thus releasing the restriction on the position of the iron plate 33. The operator then drives the insert plate 28 and the iron plate 33 downward, releasing the magnetic attraction between the iron plate 33 and the magnet block 34, so that the top of the insert plate 28 is no longer in the second slot 32, and the insert plate 28 slides relative to the slide plate 31. The position of the insert plate 28 is limited by the support plate 30, preventing the insert plate 28 from slipping off the support frame 2. The operator then drives the support base 7 and the fixed base 3 to translate, causing the positioning block 22 to disengage from the positioning groove 21, and the second limiting strip 26 to disengage. Once the second limiting groove 27 is removed, the fixed seat 3 and the support seat 7 can be dismantled. The position of the second support ball 6 is limited by the first bolt 23 so that the second support ball 6 is fixed relative to the support seat 7. Then, the operator drives the lead screw 5 to rotate relative to the second support ball 6, thereby adjusting the distance between the first support ball 4 and the second support ball 6. When it is necessary to install the support seat 7 on the support frame 2 again, the operator drives the first bolt 23 to rotate so that the first bolt 23 disengages from the thread groove 24 and the support seat 7, thereby releasing the limitation on the position of the second support ball 6, so that the support seat 7 can rotate relative to the second support ball 6. After the combined transformer body 1 is rotated and adjusted relative to the support frame 2, the support seat 7 can be slid back into the second U-shaped plate 25 so that the second limiting strip 26 can slide back into the second limiting groove 27, ensuring that the plug-in locking mechanism can lock and position the support seat 7 again.

[0024] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. A stable-installation combined current transformer, comprising a combined current transformer body (1) and a support frame (2) disposed below the combined current transformer body (1), characterized in that, Also includes: A rotating support assembly is provided on the support frame (2) for rotating support of the combined current transformer body (1). Angle adjustment structure includes several fixed seats (3) set below the combined transformer body (1) and a positioning unit for positioning the fixed seats (3). The fixed seat (3) is rotatably connected to a first support ball (4) at the end away from the positioning unit. A screw rod (5) is fixedly connected to the first support ball (4). A threaded second support ball (6) is sleeved on the outside of the screw rod (5). A support seat (7) is rotatably sleeved on the outside of the second support ball (6). A plug-in locking mechanism for locking the position of the support seat (7) is provided on the support frame (2). The rotating support assembly includes a fixed block (8) disposed above the support frame (2), a third support ball (9) is rotatably connected to the fixed block (8), and the third support ball (9) is fixedly connected to the bottom end of the combined transformer body (1). A first U-shaped plate (10) is sleeved on the outside of the fixed block (8), and the first U-shaped plate (10) is fixedly connected to the support frame (2). A first limiting groove (12) is opened on the fixed block (8), and a first limiting strip (11) is slidably disposed in the first limiting groove (12), and the first limiting strip (11) is fixedly connected to the first U-shaped plate (10). A plug-in mechanism adapted to the fixed block (8) is provided on the support frame (2). The plug-in locking mechanism includes a second U-shaped plate (25) sleeved on the outside of the support base (7), a second limiting groove (27) is provided on the support base (7), a second limiting strip (26) is slidably provided in the second limiting groove (27), and the second limiting strip (26) is fixedly connected to the second U-shaped plate (25). A second slot (32) is provided at the bottom of the support base (7), and several insert plates (28) are passed through the support frame (2). The top of the insert plate (28) is located in the corresponding second slot (32), and a stopper that cooperates with the insert plate (28) is installed on the support frame (2).

2. The stable-installation combined transformer according to claim 1, characterized in that, The insertion mechanism includes a fixed shaft (14) located below the support frame (2). The top of the fixed shaft (14) is fixedly connected to a plug (13). The plug (13) passes through the support frame (2). The bottom of the fixed block (8) is provided with a first slot (29) that cooperates with the plug (13). The top of the plug (13) is located in the first slot (29). An elastic element that cooperates with the fixed shaft (14) is installed on the support frame (2).

3. The stable combined current transformer according to claim 2, characterized in that, The elastic element includes at least one fixed frame (19) fixedly installed on the top of the support frame (2). A movable column (15) is provided below the fixed frame (19). The movable column (15) passes through the support frame (2). The bottom end of the movable column (15) is fixedly connected to the fixed shaft (14). A groove (16) is provided on the top of the movable column (15). A support column (17) is slidably provided in the groove (16). The bottom end of the support column (17) and the bottom of the inner wall of the groove (16) are connected by a tension spring (18). The top end of the support column (17) is fixedly connected to the fixed frame (19).

4. The stable combined current transformer according to claim 1, characterized in that, The positioning unit includes several fixed plates (20) fixedly installed on the bottom of the combined transformer body (1). The fixed plates (20) have positioning grooves (21) and positioning blocks (22) are provided in the positioning grooves (21). The positioning blocks (22) and the fixed seats (3) are fixedly connected, and the fixed plates (20) are located on the side of the fixed seats (3) away from the first support ball (4).

5. The stable combined current transformer according to claim 1, characterized in that, The support base (7) has a first bolt (23) running through it, and the second support ball (6) has a threaded groove (24) that matches the first bolt (23).

6. The stable-installation combined transformer according to claim 2, characterized in that, The stopper includes an iron plate (33) fixedly installed on the insert plate (28). The iron plate (33) is located below the support frame (2). A magnet (34) is provided on the top of the iron plate (33). The magnet (34) and the support frame (2) are fixedly connected. A rotating frame (35) is rotatably sleeved on the outside of the fixed shaft (14). The bottom of the iron plate (33) and the top of the rotating frame (35) are in contact. A stopper that cooperates with the rotating frame (35) is installed on the support frame (2).

7. The stable combined current transformer according to claim 6, characterized in that, The stopper includes several second bolts (36) located below the combined transformer body (1). The second bolts (36) pass through the support frame (2) and the rotating frame (35). The outside of the second bolts (36) is fitted with nuts (37) located below the rotating frame (35).

8. The stable combined current transformer according to claim 1, characterized in that, The bottom of the insert plate (28) is provided with a groove (38), and a slide plate (31) is slidably provided in the groove (38). The bottom end of the slide plate (31) and the support frame (2) are fixedly connected by a support plate (30).

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