Energy-saving explosion-proof leadless resistor fusing device

Abstract

The utility model relates to the technical field of circuit protection, in particular to an energy-saving explosion-proof leadless resistor fusing device, which comprises a base mechanism, the base mechanism comprises a high-strength insulator, the lower end of the high-strength insulator is fixedly connected with a trunnion used for connection, the lower end of the trunnion is fixedly connected with a trunnion sleeve, the trunnion sleeve is rotatably connected with a fusing mechanism, and the fusing mechanism is connected with the high-strength insulator. The fusing mechanism comprises a fuse tube, the fuse tube is hollow, quartz sand is arranged in the fuse tube, the lower end of the fuse tube is fixedly connected with a lower metal hoop, the lower metal hoop is rotationally connected with the trunnion sleeve, an exhaust channel is arranged in the lower metal hoop, a groove is formed in the upper surface of the lower metal hoop, wood alloy is connected in the groove in a sleeved mode, and the wood alloy is arranged in the groove. According to the energy-saving anti-explosion leadless resistor fusing device, special anti-explosion structures and materials are adopted, and when the energy-saving anti-explosion leadless resistor fusing device is fused, rising of the internal pressure can be dredged, the shell is prevented from being broken and exploded, and the safety of surrounding personnel and equipment is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit protection technical field, concretely relates to a kind of energy-saving explosion-proof leadless resistance fuse device. BACKGROUND

[0002] The fuse device is a kind of circuit protection equipment, and its core function is that when the circuit appears abnormal, the heat generated by itself makes the specific fuse melt, so as to cut off the circuit, avoid other elements in the circuit from being damaged due to excessive current, and ensure the safe operation of circuit system.

[0003] When the traditional fuse blows in short circuit or overload, electric arc and high temperature will be generated. Due to the limitation of its structure and material, it cannot effectively inhibit the sharp rise of internal pressure and the release of energy, which may cause the rupture and explosion of the fuse shell, and cause serious threat to the surrounding personnel and equipment. The sparks generated during the blowing process may splash into the surrounding environment. If there are flammable and explosive substances around, such as gas stations and chemical warehouses, it is very likely to cause secondary disasters such as fire or explosion, causing greater losses.

[0004] Therefore, there is an urgent need for an energy-saving explosion-proof leadless resistance fuse device to improve the shortcomings of the prior art. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing an energy-saving explosion-proof leadless resistance fuse device to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides an energy-saving explosion-proof leadless resistance fuse device, which comprises a base mechanism, the base mechanism comprises a high-strength insulator, the lower end of the high-strength insulator is fixedly connected with an ear shaft for connection, the lower end of the ear shaft is fixedly connected with an ear shaft sleeve, the ear shaft sleeve is rotatably connected with a fuse mechanism, the fuse mechanism comprises a fuse tube, the fuse tube is hollow inside, the fuse tube is provided with quartz sand inside, the lower end of the fuse tube is fixedly connected with a lower metal clamp, the lower metal clamp is rotatably connected with the ear shaft sleeve, the lower metal clamp is provided with an exhaust passage inside, the upper surface of the lower metal clamp is provided with a groove, the groove is sleeved with wood alloy, and the wood alloy is melted to open the exhaust passage and reduce the internal pressure.

[0007] As a further improvement of the technical solution, the lower end of the high-strength insulator is fixedly connected with a lower terminal, the upper end of the high-strength insulator is fixedly connected with an upper terminal, and the surface of the high-strength insulator is fixedly connected with a fixed mounting plate for mounting.

[0008] As a further improvement of the technical solution, the upper end of the high-strength insulator is fixedly connected with a waterproof cover, and the lower end of the waterproof cover is fixedly connected with a connecting buckle for fixing the fuse tube.

[0009] As a further improvement of the technical solution, the fuse tube is internally fixedly connected with a filter plate, the filter plate is used for preventing the quartz sand from falling, the exhaust passage is located directly below the filter plate, and the exhaust passage is communicated with the fuse tube.

[0010] As a further improvement of the technical solution, the upper metal hoop is internally hollow, the spring is fixedly connected in the upper metal hoop, and the other end of the spring is fixedly connected with the hammer.

[0011] As a further improvement of the technical solution, the upper metal hoop is internally hollow, the spring is fixedly connected in the upper metal hoop, and the other end of the spring is fixedly connected with the hammer.

[0012] As a further improvement of the technical solution, the upper metal hoop is internally hollow, the spring is fixedly connected in the upper metal hoop, and the other end of the spring is fixedly connected with the hammer.

[0013] Compared with the prior art, the energy-saving explosion-proof leadless resistance fuse device has the beneficial effects that:

[0014] The energy-saving explosion-proof leadless resistance fuse device adopts special explosion-proof structure and materials, can dredge the increase of internal pressure during fusing, prevents the shell from being broken and exploded, and ensures the safety of surrounding personnel and equipment. For example, the shell of some improved fuses adopts a composite material with good explosion-proof performance, can withstand a large internal pressure, and simultaneously releases the internal high-pressure gas and arc energy safely through the reasonably designed pressure relief hole. Through optimization of the arc extinguishing structure and materials, the improved fuse can quickly extinguish the arc, reduces the possibility of spark splashing, and reduces the risk of triggering secondary disasters. For example, the new quartz sand can improve the arc extinguishing efficiency and make the arc extinguished in a short time. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic view of the embodiment;

[0016] Figure 2 It is a base mechanism structure schematic view of the embodiment;

[0017] Figure 3 It is a fuse tube structure schematic view of the embodiment;

[0018] Figure 4 It is a fuse tube upper end structure schematic view of the embodiment;

[0019] Figure 5 It is a fuse tube lower end structure schematic view of the embodiment.

[0020] The meanings of various reference numerals in the drawings are as follows:

[0021] 1. Base mechanism; 10. High-strength insulator; 11. Mounting plate; 12. Trunnion; 13. Lower terminal; 14. Upper terminal; 15. Trunnion sleeve; 16. Waterproof cover; 17. Connecting buckle;

[0022] 2. Fuse mechanism; 20. Fuse tube; 200. Quartz sand; 201. Filter plate; 202. Wood's alloy; 21. Lower metal hoop; 210. Exhaust channel; 22. Operating ring; 23. Upper metal hoop; 230. Spring; 231. Stop block; 232. Strike pin. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 As shown, this embodiment provides an energy-saving explosion-proof leadless resistance fuse device, including a base mechanism 1. The base mechanism 1 includes a high-strength insulator 10. A trunnion 12 for connection is fixedly connected to the lower end of the high-strength insulator 10. A trunnion sleeve 15 is fixedly connected to the lower end of the trunnion 12. A fuse mechanism 2 is rotatably connected to the trunnion sleeve 15. The fuse mechanism 2 includes a fuse tube 20. The fuse tube 20 is hollow inside and contains quartz sand 200. A lower metal hoop 21 is fixedly connected to the lower end of the fuse tube 20. The lower metal hoop 21 is rotatably connected to the trunnion sleeve 15. An exhaust channel 210 is provided inside the lower metal hoop 21. A groove is provided on the upper surface of the lower metal hoop 21. Wood's alloy 202 is sleeved in the groove. After the Wood's alloy 202 melts, the exhaust channel 210 opens to reduce the internal pressure.

[0025] The working principle described above is as follows: When an overload or short-circuit current passes through, the Wood alloy 202 inside the fuse tube 20 melts rapidly due to high temperature, triggering the deformation of its surface groove structure, which opens the pre-set exhaust channel 210 inside the lower metal hoop 21, quickly releasing the internal high-pressure gas; at the same time, the quartz sand 200 inside the fuse tube 20 extinguishes the arc by absorbing the arc energy and dividing the ionized gas. Combined with the rotating connection design of the base mechanism 1, the fuse tube 20 is drooped and detached from the circuit by gravity at the moment of melting, forming double explosion-proof protection and cutting off the fault current.

[0026] To enhance safety and ease of installation for outdoor use, in this implementation, the high-strength insulator 10 is fixedly connected to a lower terminal 13 at its lower end and an upper terminal 14 at its upper end. A mounting plate 11 for installation is fixedly connected to the surface of the high-strength insulator 10, and a waterproof cover 16 is fixedly connected to the upper end of the high-strength insulator 10. A connecting buckle 17 for fixing the fuse tube 20 is fixedly connected to the lower end of the waterproof cover 16. Current flows in through the lower terminal 13, passes through the internal structure of the fuse, and flows out through the upper terminal 14 at its upper end, thus achieving circuit continuity. The mounting plate 11 on its surface can be used with bolts, nuts, and other connecting parts to securely install the fuse on utility poles, brackets, and other supporting structures. This not only simplifies the installation process but also ensures the stability of the installation, preventing loosening or displacement due to external factors. In addition, the waterproof cover 16 at the top of the high-strength insulator 10 can effectively prevent rainwater, dust and other impurities from entering the fuse. The connecting buckle 17 at the bottom of the waterproof cover 16 is used to fix the fuse tube 20, making the installation and replacement of the fuse tube 20 more convenient, while ensuring the reliability of the electrical connection, and comprehensively improving the safety and ease of installation of the fuse in outdoor use.

[0027] To ensure timely pressure relief before the fuse tube 20 melts during a short circuit, thus reducing the risk of explosion, a filter plate 201 is fixedly connected to the lower end of the fuse tube 20 in this embodiment. The filter plate 201 prevents the silica sand 200 from falling out. An exhaust channel 210 is located directly below the filter plate 201 and is connected to the fuse tube 20. When a short circuit occurs, complex changes occur inside the fuse tube 20. The filter plate 201, fixed at the lower end of the fuse tube 20, plays a crucial role, preventing the silica sand 200 from falling out and ensuring it remains stably within the fuse tube 20. As a commonly used arc-extinguishing material, silica sand 200 can quickly absorb the arc energy generated by the fuse melting during a short circuit, causing the arc to extinguish rapidly. The exhaust channel 210, located directly below the filter plate 201 and connected to the fuse tube 20, plays a vital pressure relief function at the moment of the short circuit.

[0028] To ensure timely circuit disconnection in the event of a short circuit or overload, in this embodiment, an upper metal clamp 23 is fixedly connected to the upper end of the fuse tube 20. An operating ring 22 is fixedly connected to the side surface of the upper metal clamp 23. The upper metal clamp 23 is hollow inside, and a spring 230 is fixedly connected inside it. A striking pin 232 is fixedly connected to the other end of the spring 230. The striking pin 232 has grooves on both sides, and a stop block 231 is inserted into each groove. The other end of the stop block 231 is fixedly connected to the upper metal clamp 23. Under normal operating conditions, the spring 230 is in a pre-compressed state within the upper metal clamp 23 at the upper end of the fuse tube 20. The stop blocks 231 are inserted into the grooves on both sides of the striking pin 232 and are fixedly connected to the upper metal clamp 23, keeping the striking pin 232 stationary. When a short circuit or overload occurs, the current through the fuse tube 20 increases sharply, causing the fuse to melt due to heat. At the instant the fuse melts, the constraint of the spring 230 inside the upper metal clamp 23 disappears, and the elastic potential energy of the spring 230 is released instantaneously, pushing the striker 232 to move rapidly. The striker 232 overcomes the obstruction of the stop block 231, disengages from the stop groove, and strikes the relevant structure of the fuse tube 20, causing the fuse tube 20 to quickly disconnect the circuit, thereby protecting the electrical equipment and line safety.

[0029] In this embodiment, an energy-saving explosion-proof leadless resistance fuse device operates as follows: During normal operation, current flows into the device from the upper terminal 14 of the high-strength insulator 10, is conducted through components connected to the upper terminal 14 to the fuse tube 20, then through the fuse within the fuse tube 20, and finally exits from the lower terminal 13, forming a complete current path. The high-strength insulator 10, with its excellent insulation properties, prevents current leakage and ensures the safe operation of the device. The mounting plate 11 allows for secure installation of the device in a suitable location using bolts and other connectors, ensuring convenience and reliability. The waterproof cover 16 prevents rainwater, dust, and other impurities from entering the device, protecting internal components. Its lower connecting buckle 17 secures the fuse tube 20, ensuring a stable electrical connection.

[0030] During a short circuit or overload, the fuse melts, generating a large amount of heat and high-temperature gas, causing a rapid increase in internal pressure of the fuse tube 20. The fuse tube 20 is filled with silica sand 200, and the filter plate 201 at its lower end prevents the silica sand 200 from falling out, ensuring that the silica sand 200 can absorb arc energy during a short circuit, thus quickly extinguishing the arc. Simultaneously, as the temperature rises, the Wood's alloy 202, fitted into the groove on the lower metal clamp 21, melts after reaching its melting point. Before melting, the Wood's alloy 202 seals the exhaust channel 210; after melting, the exhaust channel 210 opens. Because the exhaust channel 210 is located directly below the filter plate 201 and connected to the fuse tube 20, the high-pressure gas inside the fuse tube 20 can be discharged through the exhaust channel 210, reducing the internal pressure of the fuse tube 20 and effectively preventing the fuse tube 20 from exploding due to excessive pressure, thus achieving explosion-proof functionality. At the moment the fuse melts, the spring 230 inside the upper metal clamp 23 loses its restraint. The upper metal hoop 23 is hollow inside. One end of the spring 230 is fixed inside the upper metal hoop 23, and the other end is connected to the striker 232. The stop blocks 231, which are fixedly connected to the upper metal hoop 23, are originally inserted in the stop grooves on both sides of the striker 232. At this time, the elastic potential energy of the spring 230 is released, pushing the striker 232 to overcome the obstruction of the stop block 231, to get out of the stop groove and hit the relevant structure of the fuse tube 20, so that the fuse tube 20 quickly disconnects the circuit, thereby ensuring the stability and reliability of the device.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An energy-saving explosion-proof leadless resistance fuse device, comprising a base mechanism (1), characterized in that: The base mechanism (1) includes a high-strength insulator (10), the lower end of which is fixedly connected to a trunnion (12) for connection, the lower end of which is fixedly connected to a trunnion sleeve (15), the trunnion sleeve (15) is rotatably connected to a fuse mechanism (2), the fuse mechanism (2) includes a fuse tube (20), the fuse tube (20) is hollow inside, the fuse tube (20) is provided with quartz sand (200) inside, the lower end of which is fixedly connected to a lower metal hoop (21), the lower metal hoop (21) is rotatably connected to the trunnion sleeve (15), the lower metal hoop (21) is provided with an exhaust channel (210) inside, the upper surface of the lower metal hoop (21) is provided with a groove, Wood's alloy (202) is sleeved in the groove, and the exhaust channel (210) opens after the Wood's alloy (202) melts to reduce the internal pressure.

2. The energy-saving explosion-proof leadless resistance fuse device according to claim 1, characterized in that: The high-strength insulator (10) has a lower terminal (13) fixedly connected to its lower end, an upper terminal (14) fixedly connected to its upper end, and a mounting plate (11) fixedly connected to its surface for installation.

3. The energy-saving explosion-proof leadless resistance fuse device according to claim 1, characterized in that: The high-strength insulator (10) is fixedly connected to a waterproof cover (16) at its upper end, and a connecting buckle (17) for fixing the fuse tube (20) is fixedly connected to the lower end of the waterproof cover (16).

4. The energy-saving explosion-proof leadless resistance fuse device according to claim 1, characterized in that: A filter plate (201) is fixedly connected to the lower end of the fuse tube (20). The filter plate (201) is used to prevent the quartz sand (200) from falling. The exhaust channel (210) is located directly below the filter plate (201) and is connected to the fuse tube (20).

5. The energy-saving explosion-proof leadless resistance fuse device according to claim 1, characterized in that: The upper end of the fuse tube (20) is fixedly connected to an upper metal hoop (23), and an operating ring (22) is fixedly connected to the side surface of the upper metal hoop (23).

6. The energy-saving explosion-proof leadless resistance fuse device according to claim 5, characterized in that: The upper metal hoop (23) is hollow inside, and a spring (230) is fixedly connected inside the upper metal hoop (23). A firing pin (232) is fixedly connected to the other end of the spring (230).

7. The energy-saving explosion-proof leadless resistance fuse device according to claim 6, characterized in that: The firing pin (232) has grooves on both sides, and a stop block (231) is inserted into the groove. The other end of the stop block (231) is fixedly connected to the upper metal hoop (23).

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