10KV jet fuse with ceramic jacket

Abstract

The utility model belongs to the technical field of fuses, and particularly relates to a ceramic jacket 10KV injection type fuse, which comprises an insulator, a bracket I, a bracket II, a mounting seat, a ceramic sleeve, a tail contact, an end contact and a limiting piece, the first support and the second support are both fixedly installed on the insulator, a grounding terminal is fixedly installed on the insulator, an upper wiring end and a lower wiring end are fixedly installed on the sides, away from each other, of the first support and the second support respectively, the installation base is fixedly installed on the second support, the tail contact is arranged on the installation base, and the grounding terminal is fixedly installed on the insulator. The porcelain sleeve is installed on the tail contact in an inserted mode, and the end contact is installed at the top end of the porcelain sleeve in an inserted mode. According to the utility model, the design is reasonable, the stability and the reliability are good, the end contact on the porcelain sleeve can be automatically controlled to be completely separated from the conductive reed when fusing occurs, rapid dismounting and replacing operation can be conveniently carried out, and the use convenience is good.

Description

Technical Field

[0001] This utility model relates to the field of fuse technology, and in particular to a ceramic-coated 10KV jet-type fuse. Background Technology

[0002] In modern power systems, fuses are key components protecting electrical equipment, and their performance directly affects the safety and stability of the power grid. Fuses are generally divided into drop-out fuses and ejector fuses. Ejector fuses have advantages such as rapid interruption of fault current, high reliability, convenient maintenance, good arc extinguishing effect, and wide applicability. However, they also have certain disadvantages, such as frequent fuse element replacement: under frequent overcurrent conditions, the fuse element is prone to melting, requiring frequent replacement, increasing maintenance workload and costs; longer melting time: although ejector fuses can quickly interrupt fault current, in some cases, the melting time is still relatively long, which may cause some damage to equipment and lines; and consumption of arc extinguishing material: ejector fuses consume arc extinguishing material during the arc extinguishing process, requiring regular inspection and replenishment of the arc extinguishing material, increasing maintenance workload and costs.

[0003] Traditional jet-type fuses often suffer from low fusing efficiency and incomplete arc extinguishing when dealing with high voltage and high current conditions, leading to equipment damage or even fires. In addition, manual replacement is required after the fuse element melts, which requires disassembling the original fuse first. This disassembly and replacement process is somewhat cumbersome and still has room for optimization.

[0004] To address these issues, this invention proposes a novel 10KV ceramic-coated jet fuse, aiming to improve the safety and reliability of the fuse while further optimizing the ease of disassembly.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings mentioned in the background art and to propose a ceramic-coated 10KV jet-type fuse.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a ceramic-coated 10KV ejector fuse, comprising an insulator, a first bracket, a second bracket, a mounting base, a porcelain bushing, a tail contact, an end contact, and a limiting component;

[0008] Both bracket one and bracket two are fixedly installed on the insulator, and a grounding terminal is fixedly installed on the insulator. The upper terminal and the lower terminal are fixedly installed on the opposite sides of bracket one and bracket two, respectively. The mounting base is fixedly installed on bracket two. The tail contact is set on the mounting base. The porcelain sleeve is inserted into the tail contact. The end contact is inserted into the top of the porcelain sleeve. The porcelain sleeve is fixedly installed with molten metal and filled with arc-extinguishing material. The limiting member is set on the bottom side of bracket one. A conductive spring that moves and abuts against the end contact is fixedly installed on the bottom side of bracket one.

[0009] Preferably, the mounting base has a mounting groove, and a support block is hingedly mounted in the mounting groove. The support block is fixedly connected to the tail contact, and the support block is in movable contact with the melt.

[0010] Preferably, both the end contact and the tail contact are cylindrical.

[0011] Preferably, the limiting member includes two support rods and a fixing rod. Two support rods arranged in parallel to each other are fixedly installed on the bottom side of the bracket. The same fixing rod is fixedly installed on the two support rods, and the fixing rod is in movable contact with the end contact.

[0012] Preferably, the ceramic sleeve has injection ports at both the top and bottom, with the upper injection port facing the conductive spring and the lower injection port facing the support block.

[0013] Preferably, the cross-section of the injection port is smaller than the cross-section of the inner diameter of the ceramic sleeve.

[0014] Preferably, an operating ring is fixedly installed on the end contact.

[0015] Preferably, both the tail contact and the ceramic sleeve are provided with a through hole, the two through holes are located on the same axis, and the through holes are inclined and face the hinge point of the support block and the mounting base.

[0016] Preferably, both the end contact and the ceramic sleeve are provided with two through holes, and the two through holes are located on the same axis and face the conductive spring.

[0017] Preferably, the bracket one, bracket two, mounting base and support block are all made of conductive materials.

[0018] The beneficial effects of this utility model are:

[0019] This 10kV ceramic-coated ejector fuse features a sophisticated design with several innovative features. First, its unique structure allows the ceramic bushing to deflect, improving both the flexibility of the equipment and ensuring circuit continuity and stability during deflection. Second, the cylindrical design of the end and tail contacts greatly simplifies the assembly and disassembly of the ceramic bushing, improving work efficiency. Simultaneously, the design of the limiting components effectively restricts the movement range of the ceramic bushing, preventing equipment damage due to excessive movement. Furthermore, the special design of the ejector nozzle allows for more precise ejection of the arc-extinguishing material during vaporization, enhancing the arc-extinguishing effect. The first through-hole further enhances arc-extinguishing efficiency, making the arc-extinguishing process faster and more thorough. The second through-hole controls the movement of the ceramic bushing end contact away from the insulator when the arc-extinguishing material vaporizes and is rapidly ejected, ensuring complete detachment of the end contact from the conductive spring and the formation of a circuit break. Finally, the fixed grounding terminal on the insulator provides additional safety, ensuring safe operation of the equipment even in extreme conditions.

[0020] In summary, the ceramic-coated 10KV jet fuse of this invention performs excellently in terms of structural design, ease of installation, arc extinguishing effect, and safety performance, and has high practical value and market promotion prospects. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of a ceramic-coated 10KV jet-type fuse proposed in this utility model;

[0023] Figure 2 In this utility model Figure 1 A schematic diagram of the three-dimensional structure from another perspective;

[0024] Figure 3 This is a partial three-dimensional structural diagram of a ceramic-jacketed 10KV jet-type fuse proposed in this utility model.

[0025] Figure 4 In this utility model Figure 3 A schematic diagram of the cross-sectional structure is provided.

[0026] In the diagram: 1. Insulator; 11. Grounding terminal; 2. Bracket 1; 21. Upper terminal; 3. Bracket 2; 31. Lower terminal; 4. Mounting base; 41. Support block; 42. Tail contact; 43. Conductive spring; 5. Porcelain bushing; 501. Arc extinguishing material; 502. Fusible element; 51. End contact; 52. Operating ring; 6. Limiting element; 7. Through hole 1; 71. Through hole 2. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] Reference Figure 1-4 A 10kV ceramic-coated ejector fuse includes an insulator 1, a first bracket 2, a second bracket 3, a mounting base 4, a porcelain bushing 5, a tail contact 42, an end contact 51, and a limiting member 6. The first bracket 2 and the second bracket 3 are both fixedly mounted on the insulator 1, and a grounding terminal 11 is fixedly mounted on the insulator 1. An upper terminal 21 and a lower terminal 31 are fixedly mounted on opposite sides of the first bracket 2 and the second bracket 3, respectively. The mounting base 4 is fixedly mounted on the second bracket 3. The tail contact 42 is mounted on the mounting base 4, and the porcelain bushing 5 is inserted into the tail contact 4. 2. The end contact 51 is inserted and installed at the top of the porcelain sleeve 5. The porcelain sleeve 5 is fixedly installed with melt 502 and filled with arc extinguishing material 501. The limiting member 6 is set on the bottom side of the bracket 2. The limiting member 6 includes two support rods and a fixing rod. Two support rods are fixedly installed on the bottom side of the bracket 2 in parallel arrangement. The same fixing rod is fixedly installed on the two support rods. The fixing rod is in movable contact with the end contact 51 and can provide a limiting effect for the porcelain sleeve 5. The bottom side of the bracket 2 is fixedly installed with a conductive spring 43 that is in movable contact with the end contact 51.

[0029] In order to achieve the jet arc extinguishing effect by melting and breaking the melt 502 due to high temperature caused by circuit overload and vaporizing the arc extinguishing material 501, and to further improve the jet arc extinguishing effect, the top and bottom of the ceramic sleeve 5 are provided with jet ports. The upper jet port faces the conductive spring 43, and the lower jet port faces the support block 41. The cross-section of the jet port is smaller than the inner diameter cross-section of the ceramic sleeve 5.

[0030] In this embodiment, in order to facilitate the deflection of the ceramic sleeve 5 and ensure the continuity of the circuit, a mounting groove is provided on the mounting base 4, and a support block 41 is hinged in the mounting groove. The support block 41 is fixedly connected to the tail contact 42, and the support block 41 is in movable contact with the molten metal 502.

[0031] In this embodiment, in order to facilitate the quick assembly and disassembly of the porcelain sleeve 5 and to make it convenient for operators to operate the porcelain sleeve 5, both the end contact 51 and the tail contact 42 are cylindrical, and an operating ring 52 is fixedly installed on the end contact 51. It is worth noting that the inner diameter of the tail contact 42 is tapered at the lower part, which is intended to ensure the stability of the porcelain sleeve 5 after it is inserted into the tail contact 42.

[0032] In this embodiment, in order to improve the spraying accuracy of the arc-extinguishing material 501 during gasification and spraying, and to achieve the effect of completely disengaging the control end contact 51 from the conductive spring 43 during the gasification and spraying of the arc-extinguishing material 501, through holes 1 and 7 are provided on both the tail contact 42 and the ceramic sleeve 5. The two through holes 1 and 7 are located on the same axis and are inclined towards the hinge point of the support block 41 and the mounting base 4. Through holes 2 and 71 are provided on both the end contact 51 and the ceramic sleeve 5. The two through holes 2 and 71 are located on the same axis and are towards the conductive spring 43. The gas generated when the arc-extinguishing material 501 is gasified can be blown obliquely towards the conductive spring 43 through the through holes 2 and 71, thereby controlling the end contact 51 to slide to the right along the conductive spring 43 and release the contact state with the conductive spring 43, thus ensuring the effect of rapid circuit breaking.

[0033] Among them, bracket 1 2, bracket 2 3, mounting base 4 and support block 41 are all made of conductive materials.

[0034] The circuits, electronic components, and module mechanisms involved all employ existing technologies, which can be fully implemented by those skilled in the art, and need no further explanation. The content protected by this application does not involve any improvement to the software, circuits, or methods.

[0035] Working principle: During use, the fuse is in the normally closed state. Current flows in through the upper terminal 21, passes through the bracket 2, conductive spring 43, end contact 51, fuse element 502, tail contact 42, support block 41, and mounting base 4, and finally flows out through the lower terminal 31, completing the circuit's on / off control. When an overload current occurs in the circuit, the fuse element 502 will gradually melt due to high temperature, causing the circuit to be interrupted. At the same time, the melting process of the fuse element 502 will trigger the arc extinguishing mechanism. The arc extinguishing material 501, after vaporization, is rapidly sprayed through the injection port. The gas is ejected, creating a strong jet arc extinguishing effect, effectively suppressing the generation and spread of the electric arc. At this time, due to the special design of through hole 1 7 and through hole 2 71, the gas generated when the arc extinguishing material 501 is vaporized will be ejected obliquely through through hole 1 7 to the hinge point of the support block 41 and the mounting base 4, enhancing the accuracy and efficiency of jet arc extinguishing. At the same time, the gas will also be blown obliquely to the conductive spring 43 through through hole 2 71. The control end contact 51 slides to the right along the conductive spring 43 and releases the contact state with the conductive spring 43, further ensuring the rapid circuit breaking.

[0036] After the fuse has blown, the operator can easily disassemble and replace the porcelain bushing 5 through the operating ring 52. The maintenance process is simple and quick. In addition, the grounding terminal 11 fixed on the insulator 1 can provide additional safety protection in extreme cases to ensure the safe operation of the equipment.

[0037] The above provides a detailed description of a 10KV ceramic-jacketed ejector fuse provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A ceramic-jacketed 10KV ejector-type fuse, characterized in that, It includes an insulator (1), a bracket one (2), a bracket two (3), a mounting base (4), a porcelain bushing (5), a tail contact (42), an end contact (51), and a limiting component (6); Both bracket 1 (2) and bracket 2 (3) are fixedly installed on insulator (1), and grounding terminal (11) is fixedly installed on insulator (1). The upper terminal (21) and lower terminal (31) are fixedly installed on the side of bracket 1 (2) and bracket 2 (3) respectively. The mounting base (4) is fixedly installed on bracket 2 (3). The tail contact (42) is set on mounting base (4). The porcelain sleeve (5) is inserted into the tail contact (42). The end contact (51) is inserted into the top of the porcelain sleeve (5). The porcelain sleeve (5) is fixedly installed with molten metal (502) and filled with arc extinguishing material (501). The limiting member (6) is set on the bottom side of bracket 1 (2). The bottom side of bracket 1 (2) is fixedly installed with a conductive spring (43) that moves and abuts against the end contact (51).

2. The ceramic-jacketed 10KV ejector fuse according to claim 1, characterized in that: The mounting base (4) has a mounting groove, and a support block (41) is hinged in the mounting groove. The support block (41) is fixedly connected to the tail contact (42), and the support block (41) is in movable contact with the melt (502).

3. A ceramic-jacketed 10KV ejector-type fuse according to claim 1, characterized in that: Both the end contact (51) and the tail contact (42) are cylindrical.

4. A ceramic-jacketed 10KV ejector-type fuse according to claim 1, characterized in that: The limiting member (6) includes two support rods and a fixing rod. Two support rods arranged in parallel to each other are fixedly installed on the bottom side of the bracket (2). The same fixing rod is fixedly installed on the two support rods. The fixing rod is in contact with the end contact (51).

5. A ceramic-jacketed 10KV ejector-type fuse according to claim 2, characterized in that: The ceramic sleeve (5) has spray nozzles at both the top and bottom. The upper spray nozzle faces the conductive spring (43), and the lower spray nozzle faces the support block (41).

6. A ceramic-jacketed 10KV ejector-type fuse according to claim 5, characterized in that: The cross-section of the injection port is smaller than the inner diameter cross-section of the porcelain sleeve (5).

7. A ceramic-jacketed 10KV ejector-type fuse according to claim 1, characterized in that: An operating ring (52) is fixedly installed on the end contact (51).

8. A ceramic-jacketed 10KV ejector-type fuse according to claim 2, characterized in that: Both the tail contact (42) and the ceramic sleeve (5) are provided with through holes (7). The two through holes (7) are located on the same axis. The through holes (7) are set at an angle and face the hinge point of the support block (41) and the mounting base (4).

9. A ceramic-jacketed 10KV ejector-type fuse according to claim 1, characterized in that: Both the end contact (51) and the ceramic sleeve (5) are provided with through holes two (71), and the two through holes two (71) are located on the same axis and face the conductive spring (43).

10. A ceramic-jacketed 10KV ejector-type fuse according to claim 1, characterized in that: The bracket one (2), bracket two (3), mounting base (4) and support block (41) are all made of conductive materials.

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