Voltage-sharing ball for high-voltage sleeve of ultrahigh-voltage alternating-current transformer

Abstract

The utility model discloses a voltage-sharing ball for a high-voltage bushing of an ultrahigh-voltage alternating-current transformer, which relates to the technical field of alternating-current transformers, and is characterized by comprising a voltage-sharing ball and contact fingers arranged on the inner side surface of the voltage-sharing ball, an installation mechanism is arranged on the inner side of the voltage-sharing ball, and a fixing mechanism is arranged on the outer wall of the voltage-sharing ball; the mounting mechanism comprises a fixing part and an extruding part; the technical effects are that the mounting mechanism comprises the fixing part and the extruding part, during mounting, the pressure equalizing ball is sleeved on the surface of the metal seat, the control rod slidably connected with the guide rail in the through groove is manually moved, and the control ring is driven to move along the ring groove, so that the arc-shaped blocks extrude the extruding plates; therefore, the clamping block is inserted into the inner wall of the slot of the metal seat, and the voltage-sharing ball is quickly fixed above the metal seat. The annular groove provides a stable track for the control ring, and the wedge-shaped groove is matched with the wedge-shaped block, so that the clamping block is accurately inserted into the insertion groove and keeps stable connection when the extrusion plate is extruded, and loosening displacement is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of alternating current transformer, specifically is high voltage bushing for voltage equalizing ball of superhigh voltage alternating current transformer. BACKGROUND

[0002] In the high voltage bushing of superhigh voltage alternating current transformer, the voltage equalizing ball plays a vital role. It can effectively improve the electric field distribution, prevent the local electric field intensity from being too high and cause insulation breakdown and other problems, and ensure the safe and stable operation of the transformer;

[0003] The voltage equalizing ball needs to be installed above the transformer guide rod when in use;

[0004] The existing voltage equalizing ball lacks precise and effective positioning and connecting structure during installation, often relies on a large amount of manpower adjustment and cumbersome operation steps, and needs to use multiple bolts to fix it during installation, which is relatively cumbersome, resulting in low installation efficiency. Therefore, the voltage equalizing ball for high voltage bushing of superhigh voltage alternating current transformer is proposed. UTILITY MODEL CONTENTS

[0005] TECHNICAL SCHEME

[0006] To achieve the above purpose, the utility model provides the following technical scheme: the voltage equalizing ball for high voltage bushing of superhigh voltage alternating current transformer, including voltage equalizing ball and contact finger arranged on the inner side of the voltage equalizing ball, the inner side of the voltage equalizing ball is provided with a mounting mechanism, and the outer wall of the voltage equalizing ball is provided with a fixing mechanism;

[0007] The mounting mechanism includes a fixed part and a pressing part;

[0008] The fixed part includes a plurality of clamping blocks and a plurality of pressing plates, and the pressing part includes a control ring and a plurality of arc-shaped blocks;

[0009] The inner side of the voltage equalizing ball is provided with a metal seat, the inner side of the metal seat is fixedly provided with a guide rod, the inner side of the voltage equalizing ball is provided with a ring groove, the surface of the metal seat is provided with four insertion grooves, the side of the plurality of clamping blocks away from the plurality of insertion grooves is respectively connected with the outer wall of the plurality of pressing plates.

[0010] Preferably, the fixing mechanism includes a control rod, the surface of the voltage equalizing ball is provided with a through groove, the inner side of the through groove is fixedly provided with a guide rail, and the surface of the guide rail is slidably connected with the inner side of the control rod.

[0011] Preferably, the inner side of the ring groove is slidably connected with the outer wall of the control ring, the inner side of the control ring is fixedly connected with the side of the plurality of arc-shaped blocks close to the control ring, and the side of the plurality of arc-shaped blocks away from the control ring is slidably connected with the outer wall of the plurality of pressing plates.

[0012] Preferably, the inner wall of the annular groove is provided with two groups of wedge-shaped grooves, and the inner walls of the two groups of wedge-shaped grooves are respectively slidably provided with two groups of wedge-shaped blocks.

[0013] Preferably, the outer wall of the equalizing ball is fixedly provided with a fixing frame, the outer wall of the fixing frame is provided with an extrusion groove, the outer wall of the control rod is slidably connected with the inner side of the fixing frame, and one side of the control rod close to the control ring is fixedly connected with the outer wall of the control ring.

[0014] Preferably, the inner wall of the rectangular groove is provided with a bolt, one side of the bolt close to the control rod is threadedly extended through the outer wall of the control rod to the inner side of the control rod, the surface of the bolt is fixedly provided with an extrusion ring, and one side of the extrusion ring close to the fixing frame is in contact with the outer wall of the fixing frame.

[0015] Preferably, the outer wall of the contact finger is in contact with the outer wall of the metal seat, the metal seat is made of metal copper, and the surface of the guide rod is provided with a sleeve.

[0016] Beneficial effects

[0017] Compared with the prior art, the utility model provides equalizing ball for high voltage sleeve of superhigh voltage ac transformer, has the following beneficial effects:

[0018] 1, the installation mechanism includes fixed part and extrusion part, when installing, the equalizing ball is sleeved on the surface of the metal seat, the control rod slidably connected with the guide rail in the through slot is manually moved, the control ring is driven to move along the annular groove, the arc-shaped block is extruded to the extrusion plate, then the clamping block is inserted into the inner wall of the insertion slot of the metal seat, and the fixing of the equalizing ball above the metal seat is quickly completed. The annular groove provides a stable track for the control ring, the wedge-shaped groove and the wedge-shaped block cooperate to make the clamping block accurately inserted into the insertion slot and stably connected when the extrusion plate is extruded, effectively preventing loosening and displacement, the whole installation process is convenient and efficient, the connection is accurate and reliable, complex tools and cumbersome steps are not needed, the installation efficiency is improved, the time and labor cost are reduced, and it is suitable for large-scale production and on-site installation operation scene.

[0019] 2, after the fixing mechanism is fixed on the metal seat by means of the installation mechanism, the bolt is manually rotated, the bolt is threadedly extended through the outer wall of the control rod and extended to the inner side of the control rod, the extrusion ring fixedly arranged on the surface of the bolt is driven to be close to the outer wall of the fixing frame and extruded to be in contact, so that the control rod is stably fixed, and then the control ring and the arc-shaped block are locked. The through slot and the guide rail accurately guide and stably constrain the movement of the control rod, this fixing mode not only ensures that the equalizing ball and the metal seat are closely and firmly connected during initial installation, but also effectively resists external interference such as vibration and temperature change during long-term operation, always maintains the fixing stability of the equalizing ball above the metal seat, and greatly enhances the operation reliability and safety of the high voltage sleeve system. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0021] Figure 2 This is a three-dimensional schematic diagram of the internal structure of the installation mechanism of this utility model;

[0022] Figure 3 This is a three-dimensional internal view of the present invention;

[0023] Figure 4 This is a three-dimensional schematic diagram of the internal structure of the fixing mechanism of this utility model;

[0024] Figure 5 This utility model Figure 2 Enlarged 3D schematic diagram of area A in the middle;

[0025] Figure 6 This utility model Figure 3 Enlarged 3D schematic diagram of area B in the middle.

[0026] In the diagram: 1. Equalizing ball; 2. Fixing mechanism; 21. Guide rail; 22. Extrusion ring; 23. Bolt; 24. Fixing frame; 25. Control rod; 26. Through groove; 3. Sleeve; 4. Mounting mechanism; 41. Guide rod; 42. Metal seat; 43. Extrusion plate; 44. Arc block; 45. Clamping block; 46. Control ring; 47. Ring groove; 48. Slot; 49. Wedge block; 5. Contact finger. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] like Figures 1-6 As shown, this embodiment proposes a pressure equalization ball 1 and a touch finger 5 provided on the inner side of the pressure equalization ball 1. An installation mechanism 4 is provided on the inner side of the pressure equalization ball 1, and a fixing mechanism 2 is provided on the outer wall of the pressure equalization ball 1.

[0030] The mounting mechanism 4 includes a fixing part and a pressing part;

[0031] The fixing part includes multiple locking blocks 45 and multiple pressing plates 43, and the pressing part includes a control ring 46 and multiple arc-shaped blocks 44;

[0032] A metal seat 42 is provided on the inner side of the equalizing ball 1. A guide rod 41 is fixedly mounted on the inner side of the metal seat 42. An annular groove 47 is formed on the inner side of the equalizing ball 1. Four slots 48 are formed on the surface of the metal seat 42. Multiple locking blocks 45 extend to the inner wall of the slots 48 on their sides, and are fixedly connected to the outer wall of the extrusion plates 43 on their sides away from the slots 48. The inner side of the annular groove 47 is slidably connected to the outer wall of the control ring 46. The inner side of the control ring 46 is slidably connected to the outer wall of the multiple extrusion plates 43. One arc-shaped block 44 is fixedly connected to the side of the control ring 46. The side of the multiple arc-shaped blocks 44 away from the control ring 46 is slidably connected to the outer wall of the multiple extrusion plates 43. Two sets of wedge-shaped grooves are opened on the inner wall of the ring groove 47. Two sets of wedge blocks 49 are slidably arranged on the inner wall of the two sets of wedge grooves. The side of the two sets of wedge blocks 49 that are close to each other is fixedly connected to the outer wall of the multiple extrusion plates 43. The outer wall of the contact finger 5 is in contact with the outer wall of the metal seat 42. The metal seat 42 is made of copper. The guide rod 41 is fitted with a sleeve 3.

[0033] In this embodiment, the installation mechanism 4 includes a fixing part and a pressing part. During installation, the equalizing ball 1 is fitted onto the surface of the metal base 42. The control rod 25, which is slidably connected to the guide rail 21 within the through groove 26, is manually moved, causing the control ring 46 to move along the annular groove 47. This causes the arc-shaped block 44 to press against the pressing plate 43, thereby allowing the locking block 45 to insert into the inner wall of the slot 48 of the metal base 42, quickly fixing the equalizing ball 1 above the metal base 42. The annular groove 47 provides a stable track for the control ring 46. The wedge groove and wedge block 49 cooperate to ensure that the locking block 45 accurately inserts into the slot 48 and maintains a stable connection when the pressing plate 43 is pressed, effectively preventing loosening and displacement. The entire installation process is convenient, efficient, and the connection is precise and reliable. It requires no complex tools or cumbersome steps, improving installation efficiency and reducing time and labor costs. It is suitable for large-scale production and on-site installation scenarios.

[0034] Example 2

[0035] like Figures 1-6 As shown, based on the same concept as Embodiment 1 above, this embodiment also proposes that the fixing mechanism 2 includes a control rod 25, a through groove 26 is opened through the surface of the equalizing ball 1, a guide rail 21 is fixedly installed on the inner side of the through groove 26, the surface of the guide rail 21 is slidably connected to the inner side of the control rod 25, a fixing frame 24 is fixedly installed on the outer wall of the equalizing ball 1, a squeezing groove is opened on the outer wall of the fixing frame 24, the outer wall of the control rod 25 is slidably connected to the inner side of the fixing frame 24, the side of the control rod 25 near the control ring 46 is fixedly connected to the outer wall of the control ring 46, a bolt 23 is provided on the inner wall of the rectangular groove, the side of the bolt 23 near the control rod 25 is threaded through the outer wall of the control rod 25 and extends to the inner side of the control rod 25, a squeezing ring 22 is fixedly sleeved on the surface of the bolt 23, and the side of the squeezing ring 22 near the fixing frame 24 contacts the outer wall of the fixing frame 24.

[0036] In this embodiment, after the fixing mechanism 2 is fixed to the metal seat 42 by the mounting mechanism, the bolt 23 is manually rotated to make the side close to the control rod 25 threaded through the outer wall of the control rod 25 and extend to the inside, drive the extrusion ring 22 fixed on the surface of the bolt 23 to be close to the outer wall of the fixing frame 24 and extrude and contact, thereby stably fixing the control rod 25, and then locking the control ring 46 and the arc-shaped block 44. The through slot 26 and the guide rail 21 precisely guide and stably constrain the movement of the control rod 25. This fixing mode not only ensures that the equalizing ball 1 is tightly and firmly connected with the metal seat 42 during initial installation, but also effectively resists external interference such as vibration and temperature change during long-term operation, always maintains the fixing stability of the equalizing ball 1 above the metal seat 42, and greatly enhances the operation reliability and safety of the high-voltage bushing system.

[0037] In use, the equalizing ball 1 is sleeved on the surface of the metal seat 42, and after the sleeving is completed, the control rod 25 is manually moved, which can drive the control ring 46 to move synchronously. The control ring 46 can drive the plurality of arc-shaped blocks 44 to move synchronously during the movement, and the plurality of arc-shaped blocks 44 can extrude the plurality of extrusion plates 43 when moving to the plurality of extrusion plates 43. The plurality of extrusion plates 43 can control the plurality of clamping blocks 45 to be inserted into the inner wall of the plurality of insertion grooves 48 when extruded. After the plurality of clamping blocks 45 are inserted into the inner wall of the plurality of insertion grooves 48, the equalizing ball 1 can be fixed above the metal seat 42.

[0038] After the equalizing ball 1 is fixed, the bolt 23 is manually controlled to rotate, which can make the side of the extrusion ring 22 close to the fixing frame 24 extrude and contact with the outer wall of the fixing frame 24. The control rod 25 can be fixed after the extrusion ring 22 contacts with the outer wall of the fixing frame 24. The control ring 46 can be fixed after the control rod 25 is fixed. The plurality of arc-shaped blocks 44 can be fixed after the control ring 46 is fixed. The plurality of arc-shaped blocks 44 can reinforce the installation of the metal seat 42 and the surface of the equalizing ball 1 after being fixed, so that the connection is more stable after being completed.

[0039] The contact finger 5 is arranged to electrically connect the equalizing ball 1, the metal seat 42 and the guide rod 41.

[0040] The above is only a specific embodiment of the present application, but the technical features of the present application are not limited thereto. Any simple change, equivalent replacement or modification made on the basis of the present application to solve basically the same technical problem and achieve basically the same technical effect is covered by the protection scope of the present application.

Claims

1. A grading sphere for high-voltage bushings of ultra-high voltage AC transformers, comprising a grading sphere (1) and a contact finger (5) arranged on the inner side of the grading sphere (1), characterized in that: An installation mechanism (4) is provided on the inner side of the equalizing ball (1), and a fixing mechanism (2) is provided on the outer wall of the equalizing ball (1); The installation mechanism (4) includes a fixing part and a pressing part; The fixing part includes multiple locking blocks (45) and multiple pressing plates (43), and the pressing part includes a control ring (46) and multiple arc-shaped blocks (44); The inner side of the equalizing ball (1) is provided with a metal seat (42), and a guide rod (41) is fixedly provided on the inner side of the metal seat (42). The inner side of the equalizing ball (1) is provided with an annular groove (47). The surface of the metal seat (42) is provided with four slots (48). The side of the multiple locking blocks (45) close to the multiple slots (48) extends to the inner wall of the multiple slots respectively. The side of the multiple locking blocks (45) away from the multiple slots (48) is fixedly connected to the outer wall of the multiple extrusion plates (43) respectively.

2. The grading sphere for an ultra-high voltage AC transformer high voltage bushing according to claim 1, characterized in that: The fixing mechanism (2) includes a control rod (25), and a through groove (26) is provided on the surface of the equalizing ball (1). A guide rail (21) is fixedly provided on the inner side of the through groove (26), and the surface of the guide rail (21) is slidably connected to the inner side of the control rod (25).

3. The grading sphere for an ultra-high voltage AC transformer high voltage bushing according to claim 1, characterized in that: The inner side of the annular groove (47) is slidably connected to the outer wall of the control ring (46). The inner side of the control ring (46) is fixedly connected to the side of a plurality of arc blocks (44) near the control ring (46). The side of the plurality of arc blocks (44) away from the control ring (46) is slidably connected to the outer wall of a plurality of extrusion plates (43).

4. The grading sphere for an ultra-high voltage AC transformer high voltage bushing according to claim 1, characterized in that: The inner wall of the annular groove (47) is provided with two sets of wedge grooves, and two sets of wedge blocks (49) are slidably arranged on the inner wall of the two sets of wedge grooves respectively. The two sets of wedge blocks (49) are fixedly connected to the outer wall of multiple extrusion plates (43) on the side of their proximity.

5. The grading sphere for an ultra-high voltage AC transformer high voltage bushing according to claim 2, characterized in that: The outer wall of the equalizing ball (1) is fixedly provided with a fixing frame (24), the outer wall of the fixing frame (24) is provided with an extrusion groove, the outer wall of the control rod (25) is slidably connected to the inner side of the fixing frame (24), and the side of the control rod (25) near the control ring (46) is fixedly connected to the outer wall of the control ring (46).

6. The grading sphere for an ultra-high voltage AC transformer high voltage bushing according to claim 2, characterized in that: A bolt (23) is provided on the inner wall of the rectangular groove. The bolt (23) extends from the outer wall of the control rod (25) to the inner side of the control rod (25) with a thread on one side near the control rod (25). A compression ring (22) is fixedly sleeved on the surface of the bolt (23). The side of the compression ring (22) near the fixing frame (24) contacts the outer wall of the fixing frame (24).

7. The grading sphere for an ultra-high voltage AC transformer high voltage bushing according to claim 1, characterized in that: The outer wall of the finger (5) contacts the outer wall of the metal seat (42), the metal seat (42) is made of copper, and the guide rod (41) is fitted with a sleeve (3).

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