High-voltage fuse sealing insulation braising head capable of measuring temperature

Abstract

The utility model provides a high-voltage fuse sealing insulation positioning disk capable of measuring temperature, which is characterized in that a silicon rubber (7) is connected in a metal fixed sealing cover (8), a sensor signal output end (1) is connected on the metal fixed sealing cover (8), a temperature probe (3) and a first metal piece (4) are connected and packaged in the silicon rubber (7), the first metal piece (4) is connected on a chain contact finger (6) of a second metal piece (5), and the second metal piece (5) is connected on a chain contact finger (6) of the second metal piece (5). Signals are transmitted to the sensor signal output end (1) through the temperature probe (3) and the optical fiber (2) to be input into a receiving device, the silicon rubber (7) is arranged at the rear end of a fuse cylinder of the mutual inductor through the metal fixing sealing cover (8) for high-pressure sealing, and then the metal fixing sealing cover (8) is fixed to a reserved metal insert of the mutual inductor. And the braising head is good in sealing and insulating performance and internal temperature monitoring performance, high in voltage withstanding level, safe and reliable to use, simple in structure and convenient to observe.

Description

Technical Field

[0001] The utility model belongs to the technical field of voltage transformer components, and particularly relates to a temperature-measurable sealed insulating bung head of a high-voltage fuse, which can monitor the internal temperature change state of the transformer in real time. Background Art

[0002] The voltage transformer is the hub connecting the electrical secondary circuit and the primary system in the switch cabinet. When it is affected by some special non-operating factors during the operation of the power supply system, it will cause the primary coil of the voltage transformer to overcurrent and cause the overall temperature to rise. When the internal temperature of the primary coil rises to a level that exceeds the heat capacity it can withstand, it will cause damage to the voltage transformer, affecting signal acquisition and normal operation.

[0003] The infrared thermometer measures the outer surface temperature of the voltage transformer. The staff measures and records the surface temperature on site, which cannot be monitored in real time. The temperature detected is the temperature of the epoxy resin on the surface. Due to the influence of the thermal conductivity of the epoxy resin, the internal temperature is much higher than the outer surface temperature at the beginning of the fault. When the abnormal temperature is found on the surface, the internal part may have been damaged, so it cannot effectively reflect the internal fault condition. Summary of the invention

[0004] In order to improve at least one defect of the prior art, the utility model provides a temperature-measurable high-voltage fuse sealed insulating stewed head, which has a small size, simple structure, easy use, reliable electrical connection, and can monitor the internal temperature of the transformer and seal and insulate the fuse, thus solving the problem of being unable to monitor the temperature change state inside the transformer and the seal and insulation of the high-voltage fuse in real time.

[0005] The technical solution adopted by the utility model is a temperature-measurable high-voltage fuse sealed insulating head, the silicone rubber is connected in a metal fixed cover, the sensor signal output end is connected to the metal fixed cover, the temperature probe and the first metal part are connected and encapsulated in the silicone rubber, the first metal part is connected to the bracelet contact finger of the second metal part, the signal is transmitted to the sensor signal output end through the temperature probe and the optical fiber and input into the receiving device, the silicone rubber is loaded into the rear end position of the transformer fuse tube through the metal fixed cover for high-voltage sealing, and then the metal fixed cover is fixed on the reserved metal insert of the transformer.

[0006] Preferably, the first metal member, the second metal member, the silicone rubber and the metal fixed cover are coaxially arranged.

[0007] Preferably, the optical fiber is an insulating material.

[0008] The beneficial effects of the utility model are: the sealing insulation and internal temperature monitoring performance of the stewed head are good, the pressure resistance level is high, the internal temperature changes of the transformer can be measured in real time and transmitted to the relay protection device in digital mode, the use is safe and reliable, the structure is simple, the observation is convenient, the labor cost is reduced, the installation operation is convenient and reliable, time and labor are saved, the product operation reliability is improved, and higher product standard requirements are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The present invention is a schematic diagram of a temperature-measurable sealed insulating butt plug of a high-voltage fuse.

[0010] Figure 2 This is a schematic diagram of the coordination between the sealed insulating plug of a temperature-measurable high-voltage fuse and a transformer.

[0011] Figure numerals: 1-sensor signal output end, 2-optical fiber, 3-temperature probe, 4-first metal part, 5-second metal part, 6-watch chain contact finger, 7-silicone rubber, 8-metal fixed cover, 9-high-voltage conductive rod, 10-third metal part, 11-spring, 12-high-voltage fuse, 13-fourth metal part, 14-stewed head sealing part, 15-transformer coil. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0013] The specific structure is: a temperature-measurable high-voltage fuse sealed insulated head, mainly including a metal fixed cover 8, a sensor signal output terminal 1, an optical fiber 2, a temperature probe 3, a first metal part 4, a second metal part 5, a bracelet contact finger 6, and a silicone rubber 7. The metal fixed cover 8 is fixed with the mold, the sensor signal output terminal 1 and the optical fiber 2 are loaded into the mold, the first metal part 4 is tightened and then the silicone rubber 7 is injected, and the second metal part 5 is loaded after molding, and the two are electrically connected through the bracelet contact finger 6. The silicone rubber 7 is connected to the metal fixed cover 8, the sensor signal output end 1 is connected to the metal fixed cover 8, the temperature probe 3 and the first metal part 4 are connected and encapsulated in the silicone rubber 7, the first metal part 4 is connected to the bracelet contact finger 6 of the second metal part 5, the first metal part 4 is connected to the bracelet contact finger 6 fixed on the second metal part 5, and the signal is transmitted to the sensor signal output end 1 through the temperature probe 3 and the optical fiber 2 and input to the receiving device. The silicone rubber 7 is installed into the rear end position of the transformer fuse barrel through the metal fixed cover 8 for high pressure sealing, and then the metal fixed cover 8 is fixed on the reserved metal insert of the transformer. The first metal part 4, the second metal part 5, the silicone rubber 7 and the metal fixed cover 8 are coaxially arranged. The optical fiber 2 is an insulating material. >

[0014] like Figure 2 As shown, the high-voltage conductive rod 9 receives electrical energy, the third metal part 10, the spring, the high-voltage fuse 11, and the fourth metal part 13 form an electrical conduction circuit, and the primary lead of the transformer coil 15 is connected to the fourth metal part 13 to receive electrical energy to form a complete electrical circuit. The sealing part 14 of the butt head is an operating channel reserved for replacing the high-voltage fuse 12. When the replacement is completed, Figure 1 The temperature-measurable high-voltage fuse sealed insulating head shown is assembled here for high-voltage sealing insulation. After assembly, the fuse and the second metal piece 5 of the head are reliably electrically connected, the second metal piece 5 and the fourth metal piece 13 are reliably electrically connected through threads, and the fourth metal piece 13 and the primary coil of the mutual inductor are electrically connected through metallic connection. At this time, the second metal piece 5 of the temperature-measurable high-voltage fuse sealed insulating head can form a metallic conduction loop with the primary coil.

[0015] During assembly, first insert the high-voltage fuse 12 into the fuse tube inside the transformer. The fourth metal part 13 is cast in advance inside the transformer and the metal screw buckle is exposed. After completion, the second metal part 5 and the fourth metal part 13 are tightened by the screw buckle. After they are fully matched, the temperature-measurable high-voltage fuse sealed insulating head is interference fit into the head sealing part 14. The second metal part 5 and the fourth metal part 13 are metallically conductive through the watch chain contact finger 6 to form high-voltage sealed insulation and internal temperature monitoring of the transformer coil 15. Finally, they are fixed by the metal fixed cover 8 and the reserved insert of the transformer.

[0016] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A temperature-measurable high-voltage fuse sealed insulating plug, characterized in that: The silicon rubber (7) is connected to the metal fixed cover (8), the sensor signal output end (1) is connected to the metal fixed cover (8), the temperature probe (3) and the first metal part (4) are connected and encapsulated in the silicon rubber (7), the first metal part (4) is connected to the bracelet contact (6) of the second metal part (5), the signal is transmitted to the sensor signal output end (1) through the temperature probe (3) and the optical fiber (2) and input into the receiving device, the silicon rubber (7) is installed into the rear end position of the transformer fuse tube through the metal fixed cover (8) for high pressure sealing, and then the metal fixed cover (8) is fixed on the reserved metal insert of the transformer.

2. The temperature-measurable high-voltage fuse sealed insulating plug according to claim 1, characterized in that: The first metal part (4), the second metal part (5), the silicone rubber (7) and the metal fixed cover (8) are coaxially arranged.

3. The temperature-measurable high-voltage fuse sealed insulating plug according to claim 1, characterized in that: The optical fiber (2) is made of insulating material.

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