Oiled paper capacitance type bushing end screen grounding complete device

Abstract

The invention discloses an oiled paper capacitance type bushing end screen grounding complete device, and relates to the technical field of bushing end screens, the oiled paper capacitance type bushing end screen grounding complete device comprises an end screen connecting seat, the end portion of the end screen connecting seat is provided with a connector, the connector is provided with a sensor, the end screen connecting seat is provided with a through hole, the through hole is internally provided with a grounding column, and the grounding column is provided with a grounding wire. A mutual inductor is arranged on one side of the end screen connecting seat, a protective shell is arranged on the side, provided with the mutual inductor, of the end screen connecting seat, the end screen connecting seat can be connected with an end screen of a sleeve, reliable grounding of the end screen of the sleeve can be ensured through the end screen connecting seat, and therefore the electrical safety performance of a system is improved; the grounding pole on the end screen connecting base is directly connected with the ground wire, good electrical connection is ensured, the mutual inductor can monitor current changes in real time, abnormal conditions can be found in time, and the operation stability of the whole system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bushing end screens, and in particular to an oil-paper capacitor type bushing end screen grounding complete set device. Background Art

[0002] The high-voltage bushing is one of the important components of the transformer. It is not only responsible for connecting the internal winding of the transformer to the external outlet device of the oil tank through the lead wire, but also plays the role of fixing the lead wire. At present, for the high-voltage side of large oil-immersed power transformers, most of them use oil-paper capacitor bushings. The main insulating capacitor screen structure of the bushing is not much different, but the grounding structure used for the end screen grounding is quite different. In actual operation, most of the faults are caused by poor grounding of the bushing end screen.

[0003] Suspended potential discharge occurs during operation, which may even lead to the risk of casing explosion. Oil leakage and abnormal pressure in the casing may also cause serious damage. Summary of the invention

[0004] In view of the above shortcomings, the present invention provides an oil-paper capacitor type bushing end screen grounding complete set, which can effectively prevent problems such as poor grounding of the bushing end screen, oil leakage and abnormal pressure.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] A complete set of grounding devices for the end screen of an oil-paper capacitor type bushing comprises an end screen connection seat, a connection head is provided at the end of the end screen connection seat, a sensor is provided on the connection head, a through hole is provided on the end screen connection seat, a grounding column is provided in the through hole, a mutual inductor is provided on one side of the end screen connection seat, and a protective shell is provided on the side of the end screen connection seat provided with the mutual inductor.

[0007] Through the above scheme, the end screen connector is used to connect the end screen of the bushing, through which the reliable grounding of the bushing end screen can be ensured, thereby improving the electrical safety performance of the system. The grounding column on the end screen connector is directly connected to the ground wire, ensuring a good electrical connection. The mutual inductor can monitor the current changes in real time, help to detect abnormal situations in time, and improve the operating stability of the entire system.

[0008] Furthermore, a slot hole is provided on the end screen connection seat, and the slot hole is connected with the through hole through the connection hole.

[0009] The above further solution facilitates the sensor on the connector to perform detection.

[0010] Furthermore, the connector is a three-way connector, a connecting tube connected to the slot is provided on one side opening of the connector, and interfaces connected to the sensor are provided at the openings at both opposite ends of the connector.

[0011] With the above further solution, the three-way connector facilitates the connection of the sensor.

[0012] Furthermore, the sensor includes an oil pressure sensor and an oil level sensor, and the oil pressure sensor and the oil level sensor are respectively connected to interfaces on opposite ends of the connector.

[0013] Through the above further scheme, the oil pressure sensor is used to monitor the oil pressure inside the oil-paper capacitor type bushing. The oil pressure is one of the important parameters for evaluating the insulation status inside the bushing. The oil level sensor is used to monitor the oil level inside the oil-paper capacitor type bushing. The oil level directly affects the insulation performance and service life of the bushing. Through the oil pressure sensor and the oil level sensor, the oil pressure and oil level inside the bushing can be fully monitored. This helps to timely discover and deal with potential problems and ensure the normal operation of the bushing. The design of the three-way joint allows the oil pressure sensor and the oil level sensor to be easily integrated into the grounding set, reducing additional installation steps and improving the overall integration of the system.

[0014] Furthermore, the transformer is a miniature current transformer, and an indicator light is provided on the transformer.

[0015] Through the above further scheme, the miniature current transformer can monitor the current passing through the grounding wire in real time to ensure the normal operation of the grounding system, which is very important for timely detection and handling of electrical faults. The miniature current transformer is small in size, easy to install, does not take up too much space, and is suitable for use in various environments. The setting of the indicator light allows the operation and maintenance personnel to intuitively understand the working status of the transformer and make preliminary judgments without complex instruments.

[0016] Furthermore, the protective shell is made of waterproof transparent plastic.

[0017] Through the above further solution, the protective shell is made of waterproof transparent plastic material, which has both waterproof performance and the internal structure and the status of the indicator light can be observed through its surface.

[0018] Furthermore, the end screen connection seat is provided with an oil sample exhaust port, and the oil sample exhaust port is communicated with the connection hole.

[0019] Through the above further scheme, the oil sample exhaust port can be used to conveniently collect the oil sample inside the oil-paper capacitor type bushing for analyzing the oil quality, which helps to timely detect the change of oil quality and evaluate the insulation state of the bushing. There is no need to disassemble other parts, and the oil sample can be collected by simply opening the oil sample exhaust port, which simplifies the operation steps and improves work efficiency. The oil sample exhaust port can also be used to discharge the gas inside the bushing. The gas generated during the oil filling or oil discharge process helps to ensure the pressure balance inside the bushing and prevent the pressure from being too high or too low due to gas accumulation. Regularly discharging the gas can reduce the impact of the internal gas on the oil quality and insulation performance and extend the service life of the bushing.

[0020] Furthermore, the end screen connection seat is provided with bolt countersunk holes for fixing.

[0021] Through the above further scheme, a bolt countersunk hole for fixing is set on the end screen connection seat. The design of the bolt countersunk hole allows the bolt head to be completely embedded in the countersunk hole and will not protrude from the surface of the connection seat. Through the bolt countersunk hole, the end screen connection seat can be firmly fixed to the casing or other related components with bolts, ensuring the stability and reliability of the connection.

[0022] Compared with the prior art, the beneficial effects of the present invention are: the mutual inductor can monitor the current changes in real time, help to discover abnormal situations in time, and improve the operating stability of the entire system. Through the oil pressure sensor and the oil level sensor, the oil pressure and oil level inside the bushing can be fully monitored, which helps to discover and deal with potential problems in time and ensure the normal operation of the bushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the transverse cross-sectional structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the longitudinal cross-sectional structure of the present invention.

[0027] In the figure: 1. end screen connection socket; 11. through hole; 111. grounding column; 12. mutual inductor; 121. indicator light; 13. protective shell; 14. slot hole; 15. connection hole; 16. oil sample exhaust port; 17. bolt countersunk hole; 2. connector; 21. connecting tube; 22. interface; 31. oil pressure sensor; 32. oil level sensor. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Example:

[0032] Reference Figure 1-Figure 3 As shown, an oil-paper capacitor type bushing end screen grounding complete set includes an end screen connection base 1, the end screen connection base 1 is provided with a through hole 11, the through hole 11 is provided with a grounding column 111, and the grounding column 111 is directly connected to the ground wire.

[0033] The end screen connection base 1 is provided with a slot 14, and the slot 14 is connected with the through hole 11 through a connecting hole 15. A connector 2 is connected in the slot 14, and the connector 2 is a three-way connector. A connecting tube 21 connected to the slot 14 is provided on one side of the connector 2, and interfaces 22 connected to the sensor are provided at the opposite ends of the connector 2.

[0034] The sensor includes an oil pressure sensor 31 and an oil level sensor 32, which are respectively connected to the interfaces 22 on the opposite ends of the connector 2. The oil pressure sensor 31 is used to monitor the oil pressure inside the oil-paper capacitor type bushing. The oil pressure is one of the important parameters for evaluating the insulation state inside the bushing. The oil level sensor 32 is used to monitor the oil level inside the oil-paper capacitor type bushing. The oil level directly affects the insulation performance and service life of the bushing. The oil pressure sensor 31 and the oil level sensor 32 can be used to comprehensively monitor the oil pressure and oil level inside the bushing. When the oil level and pressure are abnormal, an alarm signal will be sent, which is helpful to timely discover and deal with potential problems and ensure the normal operation of the bushing. The design of the three-way joint allows the oil pressure sensor 31 and the oil level sensor 32 to be easily integrated into the grounding set, reducing additional installation steps and improving the overall integration of the system.

[0035] A transformer 12 is provided on one side of the end-screen connection socket 1. The transformer 12 is a miniature current transformer. An indicator light 121 is provided on the transformer 12. The miniature current transformer can monitor the current passing through the grounding wire in real time to ensure the normal operation of the grounding system, which is very important for timely detection and handling of electrical faults. The miniature current transformer is small in size, easy to install, does not take up too much space, and is suitable for use in various environments. The setting of the indicator light 121 allows the operation and maintenance personnel to intuitively understand the working status of the transformer 12 and make a preliminary judgment without the need for complex instruments.

[0036] When the end screen of the miniature current transformer is grounded, it can effectively extract high-frequency partial discharge signals and low-frequency current signals, and can safely perform continuous online monitoring.

[0037] The end screen connection base 1 is provided with a protective shell 13 on one side of the mutual inductor 12. The material of the protective shell 13 is waterproof transparent plastic. The protective shell 13 is made of waterproof transparent plastic material, which has both waterproof performance and the internal structure and the status of the indicator light 121 can be observed through its surface.

[0038] An oil sample exhaust port 16 is provided on the end screen connection seat 1, and the oil sample exhaust port 16 is communicated with the connection hole 15. Through the oil sample exhaust port 16, the oil sample inside the oil-paper capacitor type bushing can be conveniently collected for analyzing the oil quality, which is helpful to timely discover the change of oil quality and evaluate the insulation state of the bushing. There is no need to disassemble other components, and the oil sample can be collected by simply opening the oil sample exhaust port 16, which simplifies the operation steps and improves the work efficiency. The oil sample exhaust port 16 can also be used to discharge the gas inside the bushing. The gas generated during the oil filling or oil discharge process helps to ensure the pressure balance inside the bushing and prevent the pressure from being too high or too low due to gas accumulation. Regularly discharging gas can reduce the impact of internal gas on oil quality and insulation performance and extend the service life of the bushing.

[0039] The end screen connection seat 1 is provided with a bolt countersunk hole 17 for fixing. The bolt countersunk hole 17 is designed so that the bolt head can be completely embedded in the countersunk hole and will not protrude from the surface of the connection seat. Through the bolt countersunk hole 17, the end screen connection seat 1 can be firmly fixed to the casing or other related components with bolts to ensure the stability and reliability of the connection.

[0040] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An oil-paper capacitor type bushing end screen grounding complete set, comprising an end screen connection seat (1), characterized in that: The end of the end screen connection base (1) is provided with a connector (2), the connector (2) is provided with a sensor, the end screen connection base (1) is provided with a through hole (11), a grounding column (111) is provided in the through hole (11), a mutual inductor (12) is provided on one side of the end screen connection base (1), and a protective shell (13) is provided on the side of the end screen connection base (1) provided with the mutual inductor (12).

2. The oil-paper capacitor type bushing end screen grounding complete set according to claim 1, characterized in that: The end screen connection seat (1) is provided with a slot hole (14), and the slot hole (14) is connected with the through hole (11) via a connection hole (15).

3. The oil-paper capacitor type bushing end screen grounding complete set according to claim 2 is characterized by: The connector (2) is a three-way connector. A connecting tube (21) connected to the slot (14) is provided on one side opening of the connector (2). Interfaces (22) connected to the sensor are provided at the openings at both opposite ends of the connector (2).

4. The oil-paper capacitor type bushing end screen grounding complete set according to claim 3 is characterized by: The sensor comprises an oil pressure sensor (31) and an oil level sensor (32), and the oil pressure sensor (31) and the oil level sensor (32) are respectively connected to interfaces (22) at opposite ends of the connector (2).

5. The oil-paper capacitor type bushing end screen grounding complete set according to claim 1 is characterized by: The mutual inductor (12) is a miniature current mutual inductor, and an indicator light (121) is provided on the mutual inductor (12).

6. The oil-paper capacitor type bushing end screen grounding complete set according to claim 1, characterized in that: The material of the protective shell (13) is waterproof transparent plastic.

7. The oil-paper capacitor type bushing end screen grounding complete set according to claim 2, characterized in that: The end screen connection seat (1) is provided with an oil sample exhaust port (16), and the oil sample exhaust port (16) is communicated with the connection hole (15).

8. The oil-paper capacitor type bushing end screen grounding complete set according to claim 7, characterized in that: The end screen connection seat (1) is provided with bolt countersunk holes (17) for fixing.

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