A high-voltage bushing last screen insulation state monitoring device

Abstract

The application provides a high-voltage bushing end screen insulation state monitoring device, and belongs to the field of high-voltage bushing monitoring, to solve the problem that the existing high-voltage bushing end screen insulation state monitoring device cannot be conveniently and stably disassembled and repaired, comprising a grounding shield and a protective cover plate, a bushing end screen base is threadedly connected to the grounding shield, an insulation sleeve is fixedly connected in the bushing end screen base, an end screen grounding guide rod is arranged in the insulation sleeve, a limiting groove is formed in the protective cover plate, a grounding extension guide rod is clamped and connected in the limiting groove, and the end portion of the grounding extension guide rod is clamped with the end portion of the end screen grounding guide rod. Through the cooperation of the positioning rod and the clamping rod, combined with the positioning groove and the clamping groove, the clamping installation and disassembly separation between the grounding shield and the protective cover plate can be conveniently and stably completed, and then the convenience of subsequent maintenance work of the monitoring device can be ensured, and the assembly efficiency and the maintenance efficiency of the monitoring device are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage bushing monitoring, and more specifically, to a high-voltage bushing end-screen insulation status monitoring device. Background Technology

[0002] As a key component connecting high-voltage equipment such as transformers and reactors in a power system to external transmission lines, high-voltage bushings bear the dual functions of mechanical support and electrical insulation. Their operating status directly affects the safety and stability of the power grid. In order to ensure the normal operation of high-voltage bushings and detect potential faults in a timely manner, it is necessary to use insulation condition monitoring devices to monitor high-voltage bushings in real time.

[0003] Existing high-voltage bushing end-screen insulation status monitoring devices have some problems in actual operation. For example, a high-voltage bushing end-screen online monitoring device with publication number CN217901871U, although it sets the opening end of the second-stage outer cover and the opening end of the first-stage outer cover as detachable connection, usually requires the use of threads or multiple bolts for connection and fixation. Therefore, when it is necessary to disassemble and maintain the device, it is necessary to rotate or remove multiple bolts with great effort, which is time-consuming and laborious, and cannot be conveniently and stably disassembled and maintained. In addition, in actual operation, when the environment around the monitoring device is relatively humid, it cannot stably dehumidify the air inside the device. Therefore, the electrical components inside the monitoring device are very susceptible to measurement errors due to moisture. Therefore, we have made improvements to this and proposed a high-voltage bushing end-screen insulation status monitoring device. Utility Model Content

[0004] The purpose of this invention is to address the problems of existing high-voltage bushing end-screen insulation status monitoring devices, which cannot be easily and stably disassembled and repaired, and cannot reliably dehumidify the air inside the device.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A high-voltage bushing end-screen insulation status monitoring device is provided to improve the above-mentioned problems.

[0006] The application is as follows: The device includes a grounding shield and a protective cover. A sleeve end-screen base is threaded onto the grounding shield. An insulating sleeve is fixedly connected inside the sleeve end-screen base. A end-screen grounding guide rod is installed inside the insulating sleeve. A limiting groove is formed on the protective cover, and a grounding extension guide rod is engaged within the limiting groove. The end of the grounding extension guide rod engages with the end of the end-screen grounding guide rod. A protective cylinder is fixedly connected to the protective cover. A ring-shaped leakage current sensor and a ring-shaped high-frequency pulse current sensor are installed and fixed inside the protective cylinder. A leakage current signal aviation plug and a high-frequency pulse current signal aviation plug are also installed and fixed on the protective cover. A second storage slot is formed on the protective cylinder. A storage mesh frame is slidably connected through the protective cylinder. A magnetic cover plate is magnetically attached to the end of the storage mesh frame. A fixing rod is fixedly connected to the magnetic cover plate, which is located within the second storage slot. A second sealing ring is fixedly connected to the grounding shield.

[0007] As a preferred technical solution of this application, the grounding shield is provided with a positioning groove and a slot. The positioning groove is symmetrically distributed on both sides of one end of the grounding shield, and the slot is symmetrically distributed on both sides of the positioning groove. The positioning groove and the slot are connected. A first sealing ring is fixedly connected to the protective cover. A first storage groove is provided on both sides of the protective cover. Rubber plates are fixedly connected to both sides inside the first storage groove, and the two rubber plates are in contact with each other.

[0008] As a preferred technical solution of this application, positioning rods are fixedly connected to both sides of the protective cover plate. The positioning rods correspond one-to-one with the first storage groove and the positioning groove, respectively. A connecting spring is welded and fixed inside the positioning rod. A locking rod is welded and fixed on the connecting spring. The locking rod is slidably connected to the positioning rod. A traction rope is fixedly connected to the locking rod. A ring is fixedly connected to the other end of the traction rope.

[0009] As a preferred technical solution of this application, the traction rope is slidably connected to the protective cover and the positioning rod. The locking rods are symmetrically distributed on both sides inside the positioning rod. The locking rods correspond one-to-one with the connecting spring and the traction rope. The positioning rod is engaged in the positioning groove. The locking rods are engaged in the locking groove. The material of the protective cover is the same as that of the grounding shield.

[0010] As a preferred technical solution of this application, the protective cylinder is made of metal shielding material, the outer wall of the protective cylinder is attached to the inner wall of the grounding shield, and the second storage groove is symmetrically distributed on both sides of the protective cylinder.

[0011] As a preferred technical solution of this application, the storage mesh frame corresponds one-to-one with the second storage slot, the magnetic cover is magnetically attached to the second storage slot, and a desiccant is provided inside the storage mesh frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: In the scheme of this application: 1. By using the positioning rod and the locking rod in combination with the positioning groove and the locking groove, the installation and disassembly of the grounding shield and the protective cover can be completed conveniently and stably, thereby ensuring the convenience of subsequent maintenance of the monitoring device and effectively improving the assembly efficiency and maintenance efficiency of the monitoring device. 2. Through the combined action of the first and second sealing rings, the assembly connection of the monitoring device can be conveniently and stably sealed and protected. After the protective cover is installed, combined with the storage mesh frame and the desiccant inside, the monitoring device can be continuously and stably dehumidified and dried, ensuring the stable insulation performance of the electrical components inside the monitoring device and avoiding measurement errors caused by moisture. Moreover, the magnetic cover allows for convenient disassembly and installation of the storage mesh frame, enabling easy replacement of the desiccant and increasing the versatility and stability of the monitoring device. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall three-dimensional structure of a high-voltage bushing end-screen insulation status monitoring device provided in this application; Figure 2 A schematic diagram of the main cross-sectional structure of the storage grid frame of a high-voltage bushing end-screen insulation status monitoring device provided in this application; Figure 3 A schematic diagram of the overall main cross-sectional structure of a high-voltage bushing end-screen insulation condition monitoring device provided in this application; Figure 4 This application provides a high-voltage bushing end-screen insulation condition monitoring device. Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 A schematic diagram of the top section of the positioning rod of a high-voltage bushing end-screen insulation status monitoring device provided in this application; Figure 6 A schematic diagram of the overall top-section structure of a high-voltage bushing end-screen insulation condition monitoring device provided in this application; Figure 7 This application provides a high-voltage bushing end-screen insulation condition monitoring device. Figure 6 Enlarged structural diagram at point B; Figure 8 This is a side cross-sectional view of the grounding shield structure of a high-voltage bushing end-screen insulation status monitoring device provided in this application.

[0014] The diagram shows: 1. Grounding shield; 2. Bushing end screen base; 3. Insulating sleeve; 4. End screen grounding guide rod; 5. Positioning groove; 6. Slot; 7. Protective cover plate; 8. First sealing ring; 9. First storage groove; 10. Rubber plate; 11. Positioning rod; 12. Connecting spring; 13. Locking rod; 14. Traction rope; 15. Ring; 16. Limiting groove; 17. Grounding extension guide rod; 18. Protective cylinder; 19. Annular leakage current sensor; 20. Annular high-frequency pulse current sensor; 21. Leakage current signal aviation plug; 22. High-frequency pulse current signal aviation plug; 23. Second storage groove; 24. Storage mesh frame; 25. Magnetic cover plate; 26. Fixing rod; 27. Second sealing ring. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0016] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0017] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Example 1: like Figures 1-3 and Figures 6-8As shown, this embodiment proposes a high-voltage bushing end-screen insulation status monitoring device, including a grounding shield 1 and a protective cover 7. A bushing end-screen base 2 is threadedly connected to the grounding shield 1. An insulating sleeve 3 is fixedly connected inside the bushing end-screen base 2, and an end-screen grounding guide rod 4 is disposed inside the insulating sleeve 3. A limiting groove 16 is formed on the protective cover 7, and a grounding extension guide rod 17 is engaged within the limiting groove 16. The end of the grounding extension guide rod 17 engages with the end of the end-screen grounding guide rod 4. A protective cylinder 18 is fixedly connected to the protective cover 7, and a fixed... The device is equipped with a ring-shaped leakage current sensor 19 and a ring-shaped high-frequency pulse current sensor 20. A leakage current signal aviation plug 21 and a high-frequency pulse current signal aviation plug 22 are installed and fixed on the protective cover plate 7. A second storage slot 23 is provided on the protective cylinder 18. A storage mesh frame 24 is slidably connected through the protective cylinder 18. A magnetic cover plate 25 is magnetically attached to the end of the storage mesh frame 24. A fixing rod 26 is fixedly connected to the magnetic cover plate 25. The magnetic cover plate 25 is set in the second storage slot 23. A second sealing ring 27 is fixedly connected to the grounding shield 1.

[0021] Example 2: The solution in Example 1 will be further described below with reference to its specific working method. like Figure 1 and Figures 3-5 As shown, in a preferred embodiment, based on the above method, the grounding shield 1 is further provided with a positioning groove 5 and a slot 6. The positioning groove 5 is symmetrically distributed on both sides of one end of the grounding shield 1, and the slot 6 is symmetrically distributed on both sides of the positioning groove 5. The positioning groove 5 and the slot 6 are connected. A first sealing ring 8 is fixedly connected to the protective cover 7. A first storage groove 9 is provided on both sides of the protective cover 7. Rubber plates 10 are fixedly connected to both sides inside the first storage groove 9. The two rubber plates 10 are in contact with each other. Under the combined action of the first sealing ring 8 and the second sealing ring 27, the assembly connection of the monitoring device can be conveniently and stably sealed and protected.

[0022] like Figures 3-5As shown, in a preferred embodiment, based on the above method, further, positioning rods 11 are fixedly connected to both sides of the protective cover plate 7. The positioning rods 11 correspond one-to-one with the first storage groove 9 and the positioning groove 5, respectively. A connecting spring 12 is welded and fixed inside the positioning rod 11, and a locking rod 13 is welded and fixed to the connecting spring 12. The locking rod 13 is slidably connected to the positioning rod 11. A traction rope 14 is fixedly connected to the locking rod 13, and a ring 15 is fixedly connected to the other end of the traction rope 14. The traction rope 14 is slidably connected to the protective cover plate 7 and the positioning rod. Inside the positioning rod 11, the locking rods 13 are symmetrically distributed on both sides of the positioning rod 11. The locking rods 13 correspond one-to-one with the connecting spring 12 and the traction rope 14. The positioning rod 11 is engaged in the positioning groove 5, and the locking rods 13 are engaged in the slot 6. The protective cover 7 is made of the same material as the grounding shield 1. By using the cooperation of the positioning rods 11 and the locking rods 13, combined with the positioning groove 5 and the slot 6, the engagement, installation and disassembly of the grounding shield 1 and the protective cover 7 can be completed conveniently and stably, thereby ensuring the convenience of subsequent inspection and maintenance of the monitoring device.

[0023] like Figure 2 and Figures 6-8 As shown, in a preferred embodiment, based on the above method, the protective cylinder 18 is further made of metal shielding material. The outer wall of the protective cylinder 18 is attached to the inner wall of the grounding shield 1. The second storage slots 23 are symmetrically distributed on both sides of the protective cylinder 18. The storage mesh frame 24 corresponds one-to-one with the second storage slot 23. The magnetic cover plate 25 is magnetically attached to the second storage slot 23. A desiccant is provided inside the storage mesh frame 24. After the protective cover plate 7 is snapped in and installed, the storage mesh frame 24 and the desiccant inside can continuously and stably dehumidify and dry the inside of the monitoring device, ensuring the stable insulation performance of the electrical components inside the monitoring device and avoiding measurement errors caused by moisture.

[0024] Specifically, when using this high-voltage bushing end screen insulation status monitoring device: First, the operator can thread one end of the grounding shield 1 onto the bushing end screen base 2. At this time, under the action of the second sealing ring 27, the connection between the grounding shield 1 and the bushing end screen base 2 can be sealed. Then, the operator can engage the end groove of the grounding extension rod 17 with the end protrusion of the end screen grounding rod 4. At this time, the end screen grounding rod 4 inside the insulating sleeve 3 can be stably connected with the grounding extension rod 17.

[0025] Meanwhile, the staff can push open the rubber plates 10 on both sides inside the first storage slot 9, grab the ring 15 and pull it outward. At this time, the ring 15 can pull the two clamping rods 13 on both sides through the two traction ropes 14 to automatically move into the positioning rod 11 until the clamping rods 13 move and are stored in the positioning rod 11. Then the staff can clamp the protective cover 7 to the other end of the grounding shield 1. Under the action of the protective cover 7, the protective cylinder 18 can be stably inserted into the grounding shield 1, and then the annular leakage current sensor 19 and the annular high-frequency pulse current sensor 20 can be sleeved on the grounding extension. On the guide rod 17, at the same time, the protective cover plate 7 can drive the positioning rod 11 to be stably inserted into the positioning groove 5 on the grounding shield 1. Then the staff can release the ring 15. At this time, under the elastic action of the connecting spring 12, the locking rod 13 can be driven to move outward automatically to reset and lock into the locking groove 6. With the cooperation of the positioning rod 11 and the positioning groove 5, combined with the locking rod 13 and the locking groove 6, the locking installation between the grounding shield 1 and the protective cover plate 7 can be completed conveniently and stably. Under the action of the first sealing ring 8, the connection between the grounding shield 1 and the protective cover plate 7 can be sealed.

[0026] Before the protective cover 7 is installed, the operator can place a desiccant inside the storage frame 24, pass the storage frame 24 through the second storage slot 23, and attach it to the protective cylinder 18. Then, the operator can attach the magnetic cover 25 to the end of the storage frame 24. While closing the storage frame 24, the magnetic adsorption can stably fix the storage frame 24 to the protective cylinder 18, ensuring the stability of the installation state of the storage frame 24. After the protective cover 7 is installed, the desiccant can continuously and stably dehumidify and dry the inside of the monitoring device, preventing the monitoring device from being in a humid environment. This prevents humid air from entering the monitoring device, which could cause problems such as reduced insulation resistance, increased leakage current, or even short circuits. This ensures the stable insulation performance of the electrical components inside the monitoring device and avoids measurement errors caused by moisture.

[0027] After the monitoring device is installed on the bushing end screen base 2, the end screen grounding rod 4 can be stably connected to the grounding extension rod 17. At this time, under the action of the ring leakage current sensor 19 and the ring high-frequency pulse current sensor 20, the leakage current signal and high-frequency pulse current signal of the bushing end screen can be monitored in real time. The monitoring signal is transmitted to the online monitoring terminal through the connecting cables on the leakage current signal aviation plug 21 and the high-frequency pulse current signal aviation plug 22, so as to facilitate real-time monitoring of the insulation status of the high-voltage bushing.

[0028] When the monitoring device needs to be inspected and maintained, simply repeat the above operation: pull the ring 15 outward to move the lever 13 through the traction rope 14 and store it in the positioning rod 11. This will easily complete the disassembly and separation of the protective cover 7 and the grounding shield 1. The staff only needs to grab the fixing rod 26 on the magnetic cover 25 to move it away from the storage frame 24 and the second storage slot 23. Then the staff can disassemble the storage frame 24 and replace the desiccant inside the storage frame 24. After the replacement is completed, the protective cover 7 and the grounding shield 1 can be snapped together and installed again to ensure the stability and safety of the monitoring device's working status.

[0029] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, as well as all technical solutions and improvements that do not depart from the spirit and scope of practicality, are covered within the scope of the claims of the present utility model.

Claims

1. A high-voltage bushing end-screen insulation status monitoring device, comprising a grounding shield (1) and a protective cover (7), characterized in that, The grounding shield (1) is threadedly connected to a sleeve end screen base (2), and an insulating sleeve (3) is fixedly connected inside the sleeve end screen base (2). An end screen grounding guide rod (4) is provided inside the insulating sleeve (3). A limit groove (16) is opened on the protective cover plate (7), and a grounding extension guide rod (17) is engaged in the limit groove (16). The end of the grounding extension guide rod (17) and the end of the end screen grounding guide rod (4) are engaged. A protective cylinder (18) is fixedly connected to the protective cover plate (7), and an annular leakage current sensor (19) and an annular high-frequency pulse are installed and fixed inside the protective cylinder (18). A current sensor (20) is provided. A leakage current signal aviation plug (21) and a high-frequency pulse current signal aviation plug (22) are installed and fixed on the protective cover plate (7). A second storage groove (23) is provided on the protective cylinder (18). A storage mesh frame (24) is slidably connected through the protective cylinder (18). A magnetic cover plate (25) is magnetically attached to the end of the storage mesh frame (24). A fixing rod (26) is fixedly connected to the magnetic cover plate (25). The magnetic cover plate (25) is set in the second storage groove (23). A second sealing ring (27) is fixedly connected to the grounding shield (1).

2. The high-voltage bushing end-screen insulation status monitoring device according to claim 1, characterized in that, The grounding shield (1) has a positioning groove (5) and a slot (6) inside. The positioning groove (5) is symmetrically distributed on both sides of one end of the grounding shield (1), and the slot (6) is symmetrically distributed on both sides of the positioning groove (5). The positioning groove (5) and the slot (6) are connected. A first sealing ring (8) is fixedly connected to the protective cover (7). A first storage groove (9) is opened on both sides of the protective cover (7). Rubber plates (10) are fixedly connected to both sides inside the first storage groove (9), and the rubber plates (10) on both sides are in contact with each other.

3. The high-voltage bushing end-screen insulation status monitoring device according to claim 2, characterized in that, Positioning rods (11) are fixedly connected to both sides of the protective cover (7). The positioning rods (11) correspond one-to-one with the first storage groove (9) and the positioning groove (5). A connecting spring (12) is welded and fixed inside the positioning rod (11). A locking rod (13) is welded and fixed on the connecting spring (12). The locking rod (13) is slidably connected to the positioning rod (11). A traction rope (14) is fixedly connected to the locking rod (13). A ring (15) is fixedly connected to the other end of the traction rope (14).

4. The high-voltage bushing end-screen insulation status monitoring device according to claim 3, characterized in that, The traction rope (14) is slidably connected to the protective cover (7) and the positioning rod (11). The locking rod (13) is symmetrically distributed on both sides inside the positioning rod (11). The locking rod (13) corresponds one-to-one with the connecting spring (12) and the traction rope (14). The positioning rod (11) is engaged in the positioning groove (5). The locking rod (13) is engaged in the locking groove (6). The material of the protective cover (7) is the same as that of the grounding shield (1).

5. The high-voltage bushing end-screen insulation status monitoring device according to claim 1, characterized in that, The protective cylinder (18) is made of metal shielding material. The outer wall of the protective cylinder (18) is in contact with the inner wall of the grounding shield (1). The second storage groove (23) is symmetrically distributed on both sides of the protective cylinder (18).

6. The high-voltage bushing end-screen insulation status monitoring device according to claim 5, characterized in that, The storage mesh frame (24) corresponds one-to-one with the second storage slot (23), the magnetic cover plate (25) is magnetically attached to the second storage slot (23), and a desiccant is provided inside the storage mesh frame (24).

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