Sealing structure of current transformer

Abstract

The utility model provides a sealing structure of a current transformer, and relates to the technical field of current transformers. According to the current transformer, the first rubber pad at the bottom of the upper sealing shell is attached to the second rubber pad at the top of the lower sealing shell, a primary sealing defense line is formed, external water vapor, dust and other impurities are prevented from invading from the joint of the upper sealing shell and the lower sealing shell, the first rubber ring in the fixing base tightly surrounds the pins of the current transformer, sealing is further strengthened, and the sealing effect is improved. A second rubber ring at the top of the fixed seat blocks impurities permeating along the gap of the fixed seat, and when the current transformer generates slight displacement due to environment temperature change or internal operation, a ball on the fixed seat can reduce friction force, so that the sealing assembly can flexibly adapt to the current transformer, and the service life of the current transformer is prolonged. And the rubber pads and the rubber rings are always kept in a good sealing and attaching state, so that the internal sealing performance of the current transformer is comprehensively guaranteed, and the stable operation of the current transformer is maintained.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, and in particular to a sealing structure for a current transformer. Background Technology

[0002] Current transformers are widely used in power systems to measure and monitor current. To ensure their normal operation and extend their service life, current transformers need to have good sealing performance. Traditional sealing structures are easily affected by the external environment, such as moisture and corrosion, which can lead to equipment failure. Therefore, developing a reliable sealing structure to improve the performance and durability of current transformers has become a research hotspot in the field of power equipment.

[0003] However, in actual use, the following shortcomings still exist. For example, the existing sealing structure of current transformers cannot fully guarantee the sealing of the inside of the current transformer and maintain its stable operation. Moisture and humidity can easily enter the inside of the current transformer, causing the insulation material to become damp, reducing the insulation resistance, thereby increasing the risk of insulation breakdown, affecting the normal operation and service life of the equipment. Under high voltage, damp insulation material is more prone to partial discharge, further aggravating insulation damage, and may even cause serious faults such as phase-to-phase short circuits.

[0004] Therefore, this utility model proposes a sealing structure for a current transformer to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sealed structure for current transformers.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a sealing structure for a current transformer, comprising:

[0007] Current transformer;

[0008] A pin assembly is placed on a current transformer. The pin assembly includes a first pin disposed on one side of the top of the current transformer and a second pin fixed to the bottom of the current transformer.

[0009] A sealing assembly is placed on a current transformer. The sealing assembly includes an upper sealing shell disposed on the current transformer and a lower sealing shell disposed on the current transformer near the bottom of the upper sealing shell. A first rubber gasket is fixed to the bottom of the upper sealing shell, and a second rubber gasket is fixed to the top of the lower sealing shell. A fixing seat is fixed on both the upper and lower sealing shells. A first rubber ring is fixed inside the fixing seat, and a second rubber ring is fixed to the top of the fixing seat. A ball bearing is disposed on the fixing seat.

[0010] Furthermore, a fixing block is fixed to the bottom of the fixing base, and the fixing block has a threaded groove.

[0011] The beneficial effects of adopting the above-mentioned further solution are: the fixing block and its threaded groove at the bottom of the fixing seat are used to securely connect with external equipment. By screwing bolts and other connecting parts into the threaded groove, the fixing seat can be firmly fixed in the designated position, providing a solid installation foundation for the entire sealing assembly, ensuring that it will not be displaced due to vibration or other factors during the operation of the current transformer, and ensuring sealing stability.

[0012] Furthermore, the lower sealing shell is provided with an installation assembly, which includes a first fixing plate fixed to the lower sealing shell.

[0013] The beneficial effects of adopting the above-mentioned further solution are as follows: the first fixing plate on the lower sealing shell and the screw constitute the installation base. The screw passes through the first fixing plate and is vertically upward. Its function is to prepare for the subsequent installation of the limit block, the telescopic spring and the connection with the upper sealing shell. The first fixing plate provides support for the entire installation assembly, so that the components are arranged in an orderly manner and work together to install and fix the sealing structure.

[0014] Furthermore, a screw is fixed to the top of the first fixing plate, and a limit block is slidably connected to the screw.

[0015] The beneficial effects of adopting the above-mentioned further solution are: the limiting block slides on the screw and cooperates with the telescopic spring. When an external force is applied to the upper sealing shell, the limiting block can move on the screw, and the telescopic spring is compressed or extended accordingly. The elastic force of the spring can adjust the pressure between the upper and lower sealing shells, ensuring that the first rubber pad and the second rubber pad fit tightly, and playing a buffering role when the current transformer expands and contracts with heat, thus maintaining the sealing effect.

[0016] Furthermore, a telescopic spring is provided on the screw, one end of which is fixed to the first fixed plate, and the other end of which is fixed to the limiting block.

[0017] The beneficial effects of adopting the above-mentioned further solution are: one end of the telescopic spring is fixed to the first fixed plate, and the other end is connected to the limiting block. When the current transformer is running, if the upper and lower sealing shells have a relative displacement tendency due to various factors, the spring will extend and retract according to the displacement direction. By utilizing its elastic potential energy, it will always provide a stable force to the limiting block, so as to make the upper sealing shell and the lower sealing shell fit tightly together and ensure the sealing performance of the sealing assembly.

[0018] Furthermore, a second fixing plate is fixed on the side of the upper sealing shell near the screw, and the screw is disposed inside the second fixing plate.

[0019] The beneficial effects of adopting the above-mentioned further solution are: the second fixing plate on the upper sealing shell cooperates with the screw, the screw is inserted into it, and the second fixing plate can initially position the upper sealing shell in the screw direction, which is convenient for subsequent fastening with nuts. At the same time, it, together with the first fixing plate of the lower sealing shell, the screw, etc., constitute a stable connection system to ensure the integrity of the overall structure of the sealing assembly.

[0020] Furthermore, a nut is threaded onto the side of the screw near the top of the second fixing plate.

[0021] The beneficial effects of adopting the above-mentioned further solution are as follows: the nut is threaded on the side of the screw near the top of the second fixed plate. By rotating the nut, the tightness of the upper sealing shell can be adjusted. When the nut is tightened, the pressure between the upper and lower sealing shells is increased, which strengthens the sealing effect between the first and second rubber gaskets. Conversely, the tightness of the sealing components can be adjusted appropriately, which facilitates installation and maintenance and ensures that the sealing structure can flexibly adapt to different working scenarios.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0023] In this invention, during operation, the upper and lower sealing shells are respectively installed on the current transformer. The first rubber gasket at the bottom of the upper sealing shell and the second rubber gasket at the top of the lower sealing shell fit together to form an initial sealing barrier, preventing external moisture, dust, and other impurities from entering through the joint between the upper and lower sealing shells. The first rubber ring inside the mounting base tightly surrounds the pins of the current transformer, further strengthening the seal and preventing foreign objects from entering through gaps. The second rubber ring at the top of the mounting base blocks impurities that seep in along the gaps in the mounting base. When the current transformer experiences slight displacement due to changes in ambient temperature or internal operation, the ball bearings on the mounting base reduce friction, allowing the sealing components to adapt flexibly and ensuring that each rubber gasket and rubber ring maintains a good sealing fit at all times. This comprehensively protects the internal sealing of the current transformer and maintains its stable operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the sealing structure of a current transformer according to the present invention;

[0025] Figure 2 This is a structural breakdown diagram of the sealing structure of a current transformer according to the present invention;

[0026] Figure 3 This is a schematic diagram of the pin assembly structure of a sealing structure for a current transformer according to this utility model;

[0027] Figure 4 This is a schematic diagram of the sealing assembly structure of a current transformer according to the present invention.

[0028] Figure 5 This is a schematic diagram of the installation assembly structure of the sealing structure of a current transformer according to the present invention.

[0029] Figure label:

[0030] 1. Current transformer;

[0031] 2. Pin assembly; 21. First pin; 22. Second pin;

[0032] 3. Sealing assembly; 31. Upper sealing shell; 32. Lower sealing shell; 33. First rubber gasket; 34. Second rubber gasket; 35. Fixing seat; 36. First rubber ring; 37. Second rubber ring; 38. Ball bearing; 39. Fixing block; 310. Threaded groove;

[0033] 4. Installation components; 41. First fixing plate; 42. Screw; 43. Limiting block; 44. Telescopic spring; 45. Second fixing plate; 46. Nut. Detailed Implementation

[0034] 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.

[0035] like Figures 1-4 As shown, this embodiment provides a technical solution: a sealing structure for a current transformer, comprising:

[0036] Current transformer 1;

[0037] Pin assembly 2 is placed on current transformer 1. Pin assembly 2 includes a first pin 21 disposed on one side of the top of current transformer 1 and a second pin 22 fixed at the bottom of current transformer 1.

[0038] A sealing assembly 3 is placed on the current transformer 1. The sealing assembly 3 includes an upper sealing shell 31 on the current transformer 1, and a lower sealing shell 32 on the current transformer 1 near the bottom of the upper sealing shell 31. A first rubber pad 33 is fixed to the bottom of the upper sealing shell 31, and a second rubber pad 34 is fixed to the top of the lower sealing shell 32. Fixing seats 35 are fixed to both the upper and lower sealing shells 31 and 32. A first rubber ring 36 is fixed inside the fixing seat 35, and a second rubber ring 37 is fixed to the top of the fixing seat 35. Ball bearings 38 are provided on the fixing seat 35. During operation of the current transformer 1, their… The sealing structure plays a crucial role. The upper sealing shell 31 and the lower sealing shell 32 are tightly installed on the body of the current transformer 1. The two work together to form a key sealing barrier. The first rubber gasket 33 fixed at the bottom of the upper sealing shell 31 and the second rubber gasket 34 at the top of the lower sealing shell 32 are precisely aligned and tightly fitted. Due to the good flexibility and elasticity of the rubber gasket, when the two are fitted together, they can effectively fill the tiny gaps at the joint. With its physical properties, it forms an initial barrier against external moisture, dust and other impurities, greatly reducing the risk of these foreign objects entering through the joint between the upper sealing shell 31 and the lower sealing shell 32. To mitigate the possibility of intrusion, the mounting base 35, as a crucial component of the sealing structure, plays a key role in enhancing the sealing effect. The first rubber ring 36 within the mounting base 35 surrounds the pins of the current transformer 1. Due to its high elasticity and sealing properties, it can tightly fit the pins, completely sealing any potential gaps and effectively preventing foreign objects from entering through the gap between the pins and the sealing component 3, further improving the reliability of the seal. Simultaneously, the second rubber ring 37 at the top of the mounting base 35 provides a secondary interception of impurities that may seep in along the gaps within the mounting base 35 itself, adding another layer of protection to the sealing effect. The current transformer 1 operates in a complex and ever-changing environment. Fluctuations in ambient temperature and minor vibrations generated during internal operation can cause slight displacement. At this time, the ball bearings 38 on the fixed base 35 begin to play their role. Due to their low friction characteristics, the ball bearings 38 can effectively reduce the friction caused by displacement, allowing the sealing assembly 3 to flexibly adapt to the positional changes of the current transformer 1. This characteristic ensures that during equipment operation, the rubber pads and rubber rings can always maintain a good sealing fit, providing comprehensive and continuous protection for the internal sealing of the current transformer 1 and providing a solid and reliable foundation for its stable operation.

[0039] The above solutions also have the problem that the sealing effect of current transformer 1 cannot be maintained when it expands and contracts due to thermal expansion and contraction. Figures 1-2 as well as Figure 4As shown: A fixing block 39 is fixed to the bottom of the fixing base 35. The fixing block 39 has a threaded groove 310. The threaded groove 310 of the fixing block 39 at the bottom of the fixing base 35 is designed to be firmly connected to external equipment. By screwing bolts and other connecting parts into the threaded groove 310, the fixing base 35 can be firmly installed in the designated position. This provides a solid foundation for the entire sealing assembly 3. During the operation of the current transformer 1, even if there is interference such as vibration, the fixing base 35 will not shift, thereby ensuring the sealing stability and allowing the sealing structure to work continuously and effectively.

[0040] like Figures 1-2 as well as Figure 5As shown, an installation assembly 4 is provided on the lower sealing shell 32. The installation assembly 4 includes a first fixing plate 41 fixed on the lower sealing shell 32. The first fixing plate 41 and the screw 42 on the lower sealing shell 32 form an installation base. The screw 42 extends vertically through the first fixing plate 41 and upwards, creating conditions for the subsequent installation of the limiting block 43, the telescopic spring 44, and the connection to the upper sealing shell 31. The first fixing plate 41 provides support for the entire installation assembly 4, allowing the components to be assembled in sequence and work together to install and fix the sealing structure, ensuring that the components fit tightly. The screw 42 is fixed to the top of the first fixing plate 41, and the limiting block 43 is slidably connected to the screw 42. The limiting block 43 can be moved from the screw 42. The upper sealing shell 31 slides upwards, working in conjunction with the telescopic spring 44. When an external force is applied to the upper sealing shell 31, the limiting block 43 moves on the screw 42, causing the telescopic spring 44 to compress or extend. The spring force can flexibly adjust the pressure between the upper sealing shell 31 and the lower sealing shell 32, ensuring that the first rubber pad 33 and the second rubber pad 34 fit tightly. Moreover, when the current transformer 1 expands and contracts due to heat, the spring can also buffer and maintain the sealing effect. The screw 42 is equipped with a telescopic spring 44. One end of the telescopic spring 44 is fixed to the first fixed plate 41, and the other end of the telescopic spring 44 is fixed to the limiting block 43. One end of the telescopic spring 44 is connected to the first fixed plate 41, and the other end is connected to the limiting block 43. When the current transformer 1 is running, if there is a relative displacement tendency between the upper sealing shell 31 and the lower sealing shell 32, the spring will extend and retract in the direction of displacement. Utilizing elastic potential energy, the spring continuously applies a stabilizing force to the limiting block 43, pushing the upper sealing shell 31 and the lower sealing shell 32 to fit tightly together. This effectively ensures the sealing performance of the sealing assembly 3 and resists interference from external factors. A second fixing plate 45 is fixed on the side of the upper sealing shell 31 near the screw 42. The screw 42 is located inside the second fixing plate 45. The second fixing plate 45 of the upper sealing shell 31 fits tightly with the screw 42. When the screw 42 is inserted into the second fixing plate 45, it can initially position the upper sealing shell 31 in the direction of the screw 42, facilitating subsequent tightening with the nut 46. The second fixing plate 45, together with the first fixing plate 41 of the lower sealing shell 32, the screw 42, etc., jointly construct a stable connection system, maintain the overall structural integrity of the sealing assembly 3, and ensure the coordinated operation of each part. A nut 46 is threadedly connected to the side of the screw 42 near the top of the second fixing plate 45. The nut 46 is threadedly connected to the screw 42 near the top of the second fixing plate 45. By rotating the nut 46, the tightness of the upper sealing shell 31 can be adjusted. Tightening the nut 46 increases the pressure between the upper sealing shell 31 and the lower sealing shell 32, and strengthens the sealing effect of the rubber gasket. Conversely, it can appropriately adjust the tightness of the sealing assembly 3, which is convenient for installation and maintenance, and allows the sealing structure to flexibly adapt to the needs of different working scenarios.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A sealing structure for a current transformer, characterized in that, include: Current transformer (1); Pin assembly (2), the pin assembly (2) is placed on the current transformer (1), the pin assembly (2) includes a first pin (21) disposed on one side of the top of the current transformer (1), and a second pin (22) is fixed at the bottom of the current transformer (1). A sealing assembly (3) is placed on a current transformer (1). The sealing assembly (3) includes an upper sealing shell (31) disposed on the current transformer (1). A lower sealing shell (32) is disposed on the current transformer (1) near the bottom of the upper sealing shell (31). A first rubber pad (33) is fixed to the bottom of the upper sealing shell (31). A second rubber pad (34) is fixed to the top of the lower sealing shell (32). A fixing seat (35) is fixed on both the upper sealing shell (31) and the lower sealing shell (32). A first rubber ring (36) is fixed inside the fixing seat (35). A second rubber ring (37) is fixed to the top of the fixing seat (35). A ball bearing (38) is disposed on the fixing seat (35).

2. The sealing structure of a current transformer according to claim 1, characterized in that: The bottom of the fixed base (35) is fixed with a fixed block (39), and the fixed block (39) is provided with a threaded groove (310).

3. The sealing structure of a current transformer according to claim 1, characterized in that: The lower sealing shell (32) is provided with an installation assembly (4), which includes a first fixing plate (41) fixed on the lower sealing shell (32).

4. The sealing structure of a current transformer according to claim 3, characterized in that: A screw (42) is fixed to the top of the first fixing plate (41), and a limit block (43) is slidably connected on the screw (42).

5. The sealing structure of a current transformer according to claim 4, characterized in that: A telescopic spring (44) is provided on the screw (42). One end of the telescopic spring (44) is fixed on the first fixing plate (41), and the other end of the telescopic spring (44) is fixed on the limiting block (43).

6. The sealing structure of a current transformer according to claim 4, characterized in that: A second fixing plate (45) is fixed on the side of the upper sealing shell (31) near the screw (42), and the screw (42) is disposed inside the second fixing plate (45).

7. The sealing structure of a current transformer according to claim 6, characterized in that: A nut (46) is threaded onto one side of the screw (42) near the top of the second fixing plate (45).

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