Transformer bushing monitor
The transformer bushing monitor addresses the issue of undetected stress in the lead wire-bushing connection by using a lead wire monitoring assembly with a power on/off device to trigger alarms, ensuring the transformer's cooling efficiency through early warnings.
Patent Information
- Application Number
- CN202323589447.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-12-27
AI Technical Summary
Existing transformer bushing monitors fail to detect and warn about the stress condition of the connection between the transformer lead wire and the bushing, leading to potential deformation and oil leakage, which weakens the cooling effect of the transformer.
A transformer bushing monitor with a lead wire monitoring assembly and alarm component that includes a sleeve, pressure rings, and a power on/off device to detect excessive force and trigger alarms via a buzzer, lamp bead, and wireless current sensor when the connection is overstressed.
The monitor effectively detects and alerts staff to maintain the connection, preventing oil leakage and maintaining the transformer's cooling efficiency by warning of excessive force on the lead wire and bushing interface.
Smart Images
Figure CN222212920U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformers, in particular to a transformer bushing monitoring instrument. Background Art
[0002] In the power system, the transformer is one of the most critical equipment, and its function is to convert and transmit electrical energy. The main parts of the transformer include the core, winding and bushing. The bushing serves as the external insulation protection of the transformer and also as the interface between the lead wire and the transformer oil, playing an important role. The existing transformer bushing monitor does not have the ability to detect and warn the stress condition of the connection between the transformer lead wire and the bushing. When the connection between the transformer lead wire and the bushing is pulled, such as the daily maintenance of workers or the pulling of the transformer lead wire in extreme weather, the bushing mouth may be deformed, resulting in oil leakage inside the bushing, which weakens the cooling effect of the transformer. Utility Model Content
[0003] In order to make up for the above deficiencies, the utility model provides a transformer bushing monitor for solving the above problems.
[0004] The utility model is achieved in this way:
[0005] A transformer bushing monitor comprises a bushing body and a mounting cover, wherein the mounting cover is arranged on the top of the bushing body, and comprises:
[0006] The lead-out wire monitoring assembly comprises a sleeve, a pressure ring A, and a power on / off device, wherein the sleeve is connected to the mounting cover via an elastic ring, the pressure ring A is arranged on the outer surface of the sleeve A, and the power on / off device is arranged between the pressure ring A and the mounting cover;
[0007] An alarm component includes an alarm box, a wireless current sensor, a buzzer, a lamp bead and a power supply, wherein the alarm box is arranged on the outer surface of the sleeve body close to the mounting cover, the sleeve body is provided with a wire duct passing through the alarm box, the power supply and the wireless current sensor are arranged inside the alarm box, the buzzer and the lamp bead are respectively embedded in the side walls of the alarm box, and the power supply is electrically connected to the buzzer, the lamp bead and the wireless current sensor through the power on-off device.
[0008] In one embodiment of the utility model, the power on-off device includes an annular groove, which is arranged at the bottom of the mounting cover, an elastic membrane is arranged inside the annular groove, a pressure ring B is arranged on the side of the elastic membrane close to the pressure ring A, the pressure ring B is in contact with the pressure ring A, an electrode A is arranged on the other side of the elastic membrane, and an electrode B is arranged at a relative position on the bottom wall of the mounting cover.
[0009] In one embodiment of the utility model, one end of the power supply is electrically connected to one end of the buzzer, the lamp bead and the wireless current sensor respectively, the other end of the power supply is electrically connected to the electrode A, and the electrode B is electrically connected to the other end of the buzzer, the lamp bead and the wireless current sensor respectively.
[0010] In an embodiment of the present invention, the electrode A and the electrode B are both metal rings.
[0011] In one embodiment of the present invention, the size of the electrode B is larger than the size of the electrode A.
[0012] The beneficial effects of the utility model are as follows: the stress condition of the connection between the transformer lead wire and the bushing body is detected by the lead wire monitoring component; when the transformer lead wire is pulled to the extent that the power on-off device is closed, the lamp bead, the buzzer and the wireless current sensor respectively give warnings in the form of light, sound and signal transmission, and notify the staff to carry out maintenance, thereby solving the problem that the existing transformer bushing monitor cannot detect and give warnings of the stress condition of the connection between the transformer lead wire and the bushing body, and when the connection between the transformer lead wire and the bushing body is pulled, the bushing mouth is deformed, so that the oil inside the bushing leaks, thereby weakening the cooling effect of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;
[0016] Figure 3 for Figure 2 The structural diagram at A in the middle;
[0017] Figure 4 for Figure 3 Schematic diagram of the structure at AA in the middle;
[0018] Figure 5 for Figure 2 The structural diagram at B in the middle;
[0019] Figure 6 for Figure 2 Schematic diagram of the structure at C in the middle.
[0020] In the figure: 10, bushing body; 101, conductor pipe; 11, mounting cover; 12, sealing convex ring; 13, transformer lead wire; 20, lead wire monitoring assembly; 21, sleeve; 22, elastic ring; 23, pressure ring A; 24, power on / off device; 241, pressure ring B; 242, annular groove; 243, elastic membrane; 244, electrode A; 245, electrode B; 30, alarm assembly; 31, alarm box; 32, wireless current sensor; 33, buzzer; 34, lamp bead; 35, power supply. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.
[0023] like Figure 1-2 As shown, the utility model provides a transformer bushing monitor, including a bushing body 10 and a mounting cover 11, the mounting cover 11 is arranged on the top of the bushing body 10, and a lead wire monitoring assembly 20 is arranged on the mounting cover 11 for detecting the stress condition at the connection between the transformer lead wire 13 and the bushing body 10, and giving an early warning through an alarm device arranged on the outer surface of the bushing body 10, that is, when the pulling force on the bushing body 10 exceeds a certain level, the power on-off device 24 is turned on, the current sensor detects the change in current and sends a signal to the wireless signal transmission module, and also triggers the buzzer 33 and the lamp bead 34, and gives an early warning through sound and light, so as to avoid leakage of the internal sealing oil caused by damage to the bushing body 10 due to excessive force.
[0024] like Figure 3As shown, the lead wire monitoring assembly 20 includes a sleeve 21, a pressure ring A23, and a power on-off device 24. The sleeve 21 is sleeved on the outer surface of the transformer lead wire 13. The sleeve 21 is fixedly connected to the transformer lead wire 13. The sleeve 21 is connected to the mounting cover 11 through an elastic ring 22. The pressure ring A23 is arranged on the outer surface of the sleeve 21A, and the power on-off device 24 is arranged between the pressure ring A23 and the mounting cover 11.
[0025] like Figure 4 As shown, the power on-off device 24 includes an annular groove 242, which is arranged at the bottom of the mounting cover 11, and an elastic membrane 243 is arranged inside the annular groove 242, and a pressure ring B241 is arranged on the side of the elastic membrane 243 close to the pressure ring A23, and the pressure ring B241 is in contact with the pressure ring A23, and an electrode A244 is arranged on the other side of the elastic membrane 243, and an electrode B245 is arranged at a relative position of the bottom wall of the mounting cover 11, wherein the electrode A244 and the electrode B245 are both metal rings, and the size of the electrode B245 is larger than the size of the electrode A244, and when the electrode A244 approaches the electrode B245 and contacts the electrode B245, it is ensured that the electrode A244 can contact the electrode B245.
[0026] In this embodiment, the elastic ring 22 can be made of elastic rubber, such as isoprene rubber. The elastic ring 22 is used to give the sleeve 21 a certain amount of activity, and can drive the sleeve 21 to move when the transformer lead wire 13 is pulled. When the force is too large, the sleeve 21 squeezes the pressure ring B241 through the pressure ring A23, so that the electrode A244 and the electrode B245 are in contact. At this time, the circuit in the alarm component 30 is connected.
[0027] like Figure 5 As shown, the alarm assembly 30 includes an alarm box 31, a wireless current sensor 32, a buzzer 33, a lamp bead 34 and a power supply 35. The alarm box 31 is arranged on the outer surface of the sleeve body 10 near the mounting cover 11. The sleeve body 10 is provided with a wire duct 101 that passes through the alarm box 31. The power supply 35 and the wireless current sensor 32 are arranged inside the alarm box 31. The buzzer 33 and the lamp bead 34 are respectively embedded in the side walls of the alarm box 31. The power supply 35 is electrically connected to the buzzer 33, the lamp bead 34 and the wireless current sensor 32 through the power on-off device 24.
[0028] In this embodiment, one end of the power supply 35 is electrically connected to one end of the buzzer 33, the lamp bead 34 and the wireless current sensor 32, respectively, the other end of the power supply 35 is electrically connected to the electrode A244, the electrode B245 is electrically connected to the other end of the buzzer 33, the lamp bead 34 and the wireless current sensor 32, respectively, the lamp bead 34, the buzzer 33 and the wireless current sensor 32 are connected in parallel, when any one of the lamp bead 34, the buzzer 33 or the wireless current sensor 32 fails, an alarm can still be sent by sound, light or signal.
[0029] It should be noted that the power on / off device 24, power supply 35, buzzer 33, lamp bead 34 and wireless current sensor 32 are connected by enameled metal wires, which are not shown in the figure. At the same time, a sealing convex ring 12 is provided on the inner side of the wire conduit 101 close to the sleeve body 10 to prevent sealing oil from entering the interior of the alarm box 31 along the wire.
[0030] Specifically, the working principle of the transformer bushing monitor is as follows: when the transformer lead wire 13 is pulled, the transformer lead wire 13 drives the sleeve 21, and the sleeve 21 squeezes the pressure ring B241 through the pressure ring A23, so that the electrode A244 and the electrode B245 are in contact, and the circuit between the power supply 35, the lamp bead 34, the buzzer 33, and the wireless current sensor 32 is connected, the lamp bead 34 and the buzzer 33 are started, and an alarm is given by light and sound. At the same time, the wireless current sensor 32 detects the change in current and sends a signal to the relevant monitoring room to notify the staff to inspect the damaged bushing body 10, thereby solving the problem that the existing transformer bushing monitor does not have the ability to detect and warn the stress condition of the connection between the transformer lead wire 13 and the bushing body 10, and when the connection between the transformer lead wire 13 and the bushing body 10 is pulled, the bushing mouth may be deformed, resulting in oil leakage inside the bushing, which weakens the cooling effect of the transformer.
[0031] It should be noted that the specific models and specifications of the power supply 35, buzzer 33, lamp bead 34 and wireless current sensor 32 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.
[0032] The power supply and principles of the power supply 35 , the buzzer 33 , the lamp bead 34 and the wireless current sensor 32 are clear to those skilled in the art and will not be described in detail herein.
[0033] The utility model is further described above with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the utility model. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the utility model.
Claims
1. A transformer bushing monitor, comprising a bushing body (10) and a mounting cover (11), wherein the mounting cover (11) is arranged on the top of the bushing body (10), characterized in that: include: A lead-out wire monitoring assembly (20) comprises a sleeve (21), a pressure ring A (23), and a power on / off device (24); the sleeve (21) is connected to the mounting cover (11) via an elastic ring (22); the pressure ring A (23) is arranged on the outer surface of the sleeve (21) A; and the power on / off device (24) is arranged between the pressure ring A (23) and the mounting cover (11); An alarm assembly (30) comprises an alarm box (31), a wireless current sensor (32), a buzzer (33), a lamp bead (34) and a power supply (35); the alarm box (31) is arranged on the outer surface of the sleeve body (10) near the mounting cover (11); a wire duct (101) penetrating the interior of the alarm box (31) is provided inside the sleeve body (10); the power supply (35) and the wireless current sensor (32) are arranged inside the alarm box (31); the buzzer (33) and the lamp bead (34) are respectively embedded in the side wall of the alarm box (31); and the power supply (35) is electrically connected to the buzzer (33), the lamp bead (34) and the wireless current sensor (32) through the power on / off device (24).
2. The transformer bushing monitor according to claim 1, characterized in that: The power on-off device (24) comprises an annular groove (242), wherein the annular groove (242) is arranged at the bottom of the mounting cover (11), an elastic membrane (243) is arranged inside the annular groove (242), a pressure ring B (241) is arranged on the side of the elastic membrane (243) close to the pressure ring A (23), the pressure ring B (241) is in contact with the pressure ring A (23), an electrode A (244) is arranged on the other side of the elastic membrane (243), and an electrode B (245) is arranged at a relative position of the bottom wall of the mounting cover (11).
3. The transformer bushing monitor according to claim 2, characterized in that: One end of the power supply (35) is electrically connected to one end of the buzzer (33), the lamp bead (34) and the wireless current sensor (32), respectively; the other end of the power supply (35) is electrically connected to the electrode A (244); and the electrode B (245) is electrically connected to the other end of the buzzer (33), the lamp bead (34) and the wireless current sensor (32), respectively.
4. The transformer bushing monitor according to claim 3, characterized in that: The electrode A (244) and the electrode B (245) are both metal rings.
5. The transformer bushing monitor according to claim 4, characterized in that: The size of the electrode B (245) is larger than the size of the electrode A (244).