Fuse with breaking indication

Abstract

The utility model provides a fuse with a breaking indication function, and relates to a fuse. The fuse body is arranged in the shell; the indicator module comprises a light-operated circuit, the light-operated circuit comprises a photosensitive diode and an indicating lamp controlled by the photosensitive diode, the indicating lamp is arranged on the surface of the shell, and the photosensitive diode receives light generated when the fuse body is fused and arches to enable the light-operated circuit to be conducted. Therefore, the indicating lamp is turned on. The beneficial effects of the utility model are that strong light generated by fusing and arcing of the melt is used as a triggering condition, a control circuit does not need to be arranged independently, the device is stable and reliable, current passing through the fuse does not need to be detected, the indicating lamp can be triggered to light immediately when the melt is fused, the response speed is fast, and the safety is high. The problem that the fuse state of a traditional fuse cannot be rapidly identified can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a fuse with a disconnection indication. Background Art

[0002] When the current exceeds the specified value, the fuse generates heat to melt the fuse and disconnect the circuit. When the fuse melts, an extremely hot, bright and conductive arc will be generated in the gap between the fuse elements. Since the fuse is filled with arc extinguishing medium, the arc is absorbed to disconnect the circuit and complete the circuit protection.

[0003] With the rapid development of high and low voltage power distribution systems, fuses are one of the most common and important protective devices in the operation of power systems. In practical applications, since fuses are blocked by opaque shells such as ceramic tubes or other composite materials, it is impossible to visually observe the state of the fuse to determine whether the fuse is operating. When a circuit fails, this unintuitive phenomenon is not convenient for maintenance personnel to troubleshoot and maintain the fault.

[0004] At present, some fuses also display the disconnection status of the fuse by setting an indicator light, but these fuses all judge the disconnection status of the fuse by detecting the current of the fuse, and then control the indicator light to light up through the control circuit according to the disconnection status of the fuse. In this way, on the one hand, the indicator light needs to set up a separate control circuit and depends on the controller of the fuse, the circuit is complex and the reliability is insufficient; on the other hand, the disconnection status can only be detected after the fuse is completely disconnected, and the response speed of the indicator light is slow. Utility Model Content

[0005] In view of this, in order to solve the problems of insufficient reliability and slow response speed of the existing fuse disconnection status indication, an embodiment of the utility model provides a fuse with disconnection indication.

[0006] The embodiment of the utility model provides a fuse with disconnection indication, comprising:

[0007] shell;

[0008] a melt disposed within the housing;

[0009] And an indicator module, which includes a light control circuit, the light control circuit includes a photosensitive diode, and an indicator light controlled by the photosensitive diode, the indicator light is arranged on the surface of the shell, and the light generated by the photosensitive diode when receiving the arc caused by the melt melting makes the light control circuit conductive, thereby lighting up the indicator light.

[0010] Furthermore, it also includes a light guide column, which passes through the outer wall of the shell, and one end of the light guide column extends to the melt and the other end is connected to the photosensitive diode.

[0011] Furthermore, the housing is provided with a light-transmitting hole, and the light-guiding column is arranged in the light-transmitting hole.

[0012] Furthermore, the light-transmitting hole is a stepped hole, the light-guiding column is a stepped column, the light-guiding column is inserted into the light-transmitting hole, and the end of the photosensitive diode is embedded in the upper end of the light-transmitting hole.

[0013] Furthermore, the number of the melts is set to two, the two melts are arranged in parallel, and the lower end of the light guide column extends between the two melts.

[0014] Furthermore, the melt is in sheet form, and the two melts are arranged vertically opposite to each other.

[0015] Furthermore, the melt is provided with a plurality of rows of narrow paths, and each row of the narrow paths is formed by a plurality of cut-out holes arranged at intervals.

[0016] Furthermore, the light control circuit also includes a first triode, a second triode, a reset contact and a relay, wherein the photosensitive diode, the relay and the indicator light are connected in sequence, the photosensitive diode is also connected to the base of the second triode, the indicator light is also connected to the collector of the second triode, the emitter of the second triode is grounded, the base of the first triode is connected to the collector of the second triode, the collector of the first triode is connected to the base of the second triode, the emitter of the first triode is connected to the relay, and one end of the reset contact is connected to the photosensitive diode and the other end is grounded.

[0017] Furthermore, a first resistor is provided between the relay and the photosensitive diode, the base of the first transistor is connected to the second resistor and then to the collector of the second transistor, the collector of the first transistor is connected to the third resistor and then to the base of the second transistor, and the collector of the first transistor is also connected to the fourth resistor and then to ground.

[0018] Furthermore, the shell includes an insulating shell, two side joints, two side sealing gaskets and two side end covers, the insulating shell is open at both ends, the melt is arranged in the insulating shell, the two side joints are respectively arranged at the two ends of the insulating shell, the outer side of the side joint is provided with a protrusion, the two side sealing gaskets are respectively arranged on the outer sides of the two side joints, the protrusion passes through the side sealing gaskets, the two side end covers are respectively arranged on the outer sides of the two side sealing gaskets, the two side end covers are respectively fixedly connected to the two ends of the insulating shell and press the two side joints and the two side sealing gaskets.

[0019] The beneficial effects of the technical solution provided by the embodiment of the utility model are as follows: the utility model is a fuse with disconnection indication, when the fuse works normally, current passes through the fuse element,

[0020] When the photosensitive diode is in the cut-off state, the light-controlled circuit cannot form a loop, and the indicator light does not work; when the fuse encounters a short-circuit current, the fuse is blown and arcs immediately. The strong light generated when the fuse arcs will turn on the photosensitive diode, thereby forming a loop in the light-controlled circuit and the indicator light will light up; and when the arc inside the fuse is extinguished, the photosensitive diode is cut off, and the indicator is still in the working state, and the indicator module has a self-locking function; the strong light generated by the blown fuse and the arcing is used as the trigger condition, and there is no need to set up a separate control circuit, which is stable and reliable, and there is no need to detect the current passing through the fuse. The blown fuse can immediately trigger the indicator light to light up, and the response speed is fast, which can effectively solve the problem that traditional fuses cannot quickly identify the fuse status. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an assembly diagram of a fuse with disconnection indication of the utility model;

[0022] Figure 2 It is an exploded diagram of a fuse with disconnection indication of the utility model;

[0023] Figure 3 is a schematic diagram of the melt;

[0024] Figure 4 It is the circuit diagram of the light control circuit.

[0025] In the figure: 1. outer shell; 11. insulating shell; 12. side joint; 13. side sealing gasket; 14. side end cover; 15. light-transmitting hole; 2. indicator module; 21. photodiode; 22. indicator light; 23. light guide column; 24. sealing ring; 25. mounting block; 26. mounting groove; 27. cover plate; 3. melt; 31. narrow diameter; 32. cut-out hole. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the following will further describe the implementation of the utility model in conjunction with the accompanying drawings. The following is a preferred embodiment of the utility model among multiple possible embodiments, which is intended to provide a basic understanding of the utility model, but is not intended to confirm the key or decisive elements of the utility model or limit the scope of protection.

[0027] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0028] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0029] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0030] It should be further explained that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0031] Please refer to Figure 1 and 2 An embodiment of the utility model provides a fuse with disconnection indication, which mainly includes a housing 1, a fuse 3 and an indicator module 2.

[0032] The interior of the housing 1 is used to install the melt 3. The housing 1 specifically includes an insulating housing 11, joints 12 on both sides, sealing gaskets 13 on both sides, and end caps 14 on both sides. The insulating housing 11 is generally made of an insulating material. For example, the insulating housing 11 in this embodiment is made of ceramic. The insulating housing 11 has openings at both ends. The shape of the insulating housing 11 can be flexibly set according to the actual application scenario. For example, the insulating housing 11 in this embodiment is set to be approximately a hollow cuboid.

[0033] The melt 3 is disposed in the insulating housing 11, and is disposed along the length direction of the insulating housing 11, and both ends extend to both ends of the insulating housing 11. The melt 3 can be provided as one or more melts according to the flow capacity requirements, such as two melts 3 in this embodiment.

[0034] The melt 3 can be configured in various shapes, such as Figure 3As shown, the melt 3 in this embodiment is in sheet shape, and the two melts 3 are arranged vertically opposite to each other. Preferably, in order to make the melt 3 easier to melt, the melt 3 is provided with multiple rows of narrow diameters 31, and each row of the narrow diameters 31 is formed by multiple cut-out holes 32 arranged at intervals, that is, each row of the narrow diameters 31 is the remaining part after a row of the cut-out holes 32 are cut out. The shape and size of the cut-out holes 32 can be adjusted according to the rated current size and the short-circuit current characteristics, and the shape can be set to be rectangular or circular, etc.

[0035] The two side joints 12 are respectively arranged at the two ends of the insulating shell 11, and a protrusion is provided on the outer side of the side joint 12. The two side sealing gaskets 13 are respectively arranged on the outer sides of the two side joints 12, and the protrusion passes through the side sealing gaskets 13. The two side end covers 14 are respectively arranged on the outer sides of the two side sealing gaskets 13. The two side end covers 14 are respectively fixedly connected to the two ends of the insulating shell 11 and press the two side joints 12 and the two side sealing gaskets 13.

[0036] The indicator module 2 is arranged on the upper surface of the housing 1. The indicator module 2 comprises a mounting block 25 and a light control circuit, wherein the mounting block 25 is mounted on the upper surface of the housing 1, and the mounting block 25 is provided with a mounting groove 26 and a cover plate 27 covering the mounting groove 26 on its upper portion.

[0037] The light control circuit is installed in the installation groove 26. The light control circuit mainly includes a photosensitive diode 21 and an indicator light 22 controlled by the photosensitive diode 21. The indicator light 22 is installed on the cover plate 27. The photosensitive diode 21 runs through the installation groove 26. When the photosensitive diode 21 receives the light generated by the melt 3 when it melts and starts arcing, the light control circuit is turned on, thereby lighting up the indicator light 22.

[0038] In order to transmit the light generated when the fuse 3 is melted and arcing to the photosensitive diode 21, the fuse with breaking indication further includes a light guide column 23, and the light guide column 23 is made of transparent glass or a light-transmitting insulating composite material.

[0039] The light guide column 23 penetrates the outer wall of the housing 1, and one end of the light guide column 23 extends to the melt 3, and the other end is connected to the photosensitive diode 21. Specifically, the housing 1 is provided with a light-transmitting hole 15, and the light guide column 23 is arranged in the light-transmitting hole 15. The light-transmitting hole 15 is a stepped hole, and the light guide column 23 is a stepped column. The light guide column 23 is inserted into the light-transmitting hole 15, and the end of the photosensitive diode 21 is embedded in the upper end of the light-transmitting hole 15. In this embodiment, the lower end of the light guide column 23 extends between the two melts 3, and a sealing ring 24 is provided on the periphery of the upper end of the light guide column 23. The sealing ring 24 is arranged between the bottom of the mounting block 25 and the upper surface of the insulating shell 11, and the sealing ring 24 plays a role of sealing and light-shielding.

[0040] The light control circuit can be configured as a variety of light control circuits controlled by the photodiode 21. Figure 4 As shown, the light control circuit in this embodiment further includes a first transistor Q1, a second transistor Q2, a reset contact S1 and a relay KA1. The reset contact S1 is generally a reset switch or a reset button.

[0041] The photosensitive diode Q3 (21), the relay KA1 and the indicator light 22 are connected in sequence, the photosensitive diode Q3 (21) is also connected to the base of the second transistor Q2, the indicator light 22 is also connected to the collector of the second transistor Q2, the emitter of the second transistor Q2 is grounded, the base of the first transistor Q1 is connected to the collector of the second transistor Q2, the collector of the first transistor Q1 is connected to the base of the second transistor Q2, the emitter of the first transistor Q1 is connected to the relay KA1, and one end of the reset contact S1 is connected to the photosensitive diode Q3 (21) and the other end is grounded.

[0042] In addition, a first resistor R1 is provided between the relay KA1 and the photodiode Q3 (21); the base of the first transistor Q1 is connected to the second resistor R2 and then to the collector of the second transistor Q2; the collector of the first transistor Q1 is connected to the third resistor R3 and then to the base of the second transistor Q2; the collector of the first transistor Q1 is also connected to the fourth resistor R4 and then to ground.

[0043] When the fuse with disconnection indication works normally: the photosensitive diode Q3 (21) is not triggered, the photosensitive diode Q3 (21) is in the cut-off state, the first transistor Q1 and the second transistor Q2 are also in the cut-off state, the indicator light D1 (22) is off, and the relay KA1 is disconnected and does not work.

[0044] When the fuse with disconnection indication is triggered by a fault current such as a short circuit, the strong light generated by the arcing of the fuse 3 is irradiated to the photosensitive diode Q3 (21) through the light guide column 23, the photosensitive diode Q3 (21) is turned on, the base of the second transistor Q2 is at a high level, the second transistor Q2 is turned on to make the indicator light D1 (22) light up and the relay KA1 close and work, and at the same time, the base of the first transistor Q1 is at a low level, so that the first transistor Q1 is turned on to form a self-locking, and after the arc is extinguished, the indicator light D1 (22) continues to light up.

[0045] When the light-controlled circuit of the fuse with disconnection indication is reset: the reset contact S1 is closed, the base of the second transistor Q2 is in a grounded state, the second transistor Q2 is cut off, the first transistor Q1 is cut off, the indicator light D1 (22) is off, and the relay KA1 is disconnected and does not work.

[0046] In this article, the directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that they are relative concepts and can change accordingly according to different ways of use and placement, and the use of the directional words should not limit the scope of protection claimed in this application.

[0047] In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other. The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fuse with disconnection indication, characterized in that: include: shell; a melt disposed within the housing; And an indicator module, which includes a light control circuit, the light control circuit includes a photosensitive diode, and an indicator light controlled by the photosensitive diode, the indicator light is arranged on the surface of the shell, and the light generated by the photosensitive diode when receiving the arc caused by the melt melting makes the light control circuit conductive, thereby lighting up the indicator light.

2. A fuse with disconnection indication as claimed in claim 1, characterized in that: It also includes a light guide column, which passes through the outer wall of the shell, with one end of the light guide column extending to the melt and the other end connected to the photosensitive diode.

3. A fuse with disconnection indication as claimed in claim 2, characterized in that: The housing is provided with a light-transmitting hole, and the light-guiding column is arranged in the light-transmitting hole.

4. A fuse with disconnection indication as claimed in claim 3, characterized in that: The light-transmitting hole is a stepped hole, the light-guiding column is a stepped column, the light-guiding column is inserted into the light-transmitting hole, and the end of the photosensitive diode is embedded in the upper end of the light-transmitting hole.

5. A fuse with disconnection indication as claimed in claim 2, characterized in that: The number of the melts is set to two, the two melts are arranged in parallel, and the lower end of the light guide column extends between the two melts.

6. A fuse with disconnection indication as claimed in claim 5, characterized in that: The melt is in sheet form, and two melts are arranged vertically opposite to each other.

7. A fuse with disconnection indication as claimed in claim 1, characterized in that: The melt is provided with a plurality of rows of narrow paths, and each row of the narrow paths is formed by a plurality of cut-off holes arranged at intervals.

8. A fuse with disconnection indication as claimed in claim 1, characterized in that: The light control circuit also includes a first triode, a second triode, a reset contact and a relay, wherein the photosensitive diode, the relay and the indicator light are connected in sequence, the photosensitive diode is also connected to the base of the second triode, the indicator light is also connected to the collector of the second triode, the emitter of the second triode is grounded, the base of the first triode is connected to the collector of the second triode, the collector of the first triode is connected to the base of the second triode, the emitter of the first triode is connected to the relay, and one end of the reset contact is connected to the photosensitive diode and the other end is grounded.

9. A fuse with disconnection indication as claimed in claim 8, characterized in that: A first resistor is provided between the relay and the photodiode, the base of the first transistor is connected to the second resistor and then to the collector of the second transistor, the collector of the first transistor is connected to the third resistor and then to the base of the second transistor, and the collector of the first transistor is also connected to the fourth resistor and then to ground.

10. A fuse with disconnection indication as claimed in claim 1, characterized in that: The shell includes an insulating shell, two side joints, two side sealing gaskets and two side end covers. The two ends of the insulating shell are open, the melt is arranged in the insulating shell, the two side joints are respectively arranged at the two ends of the insulating shell, the outer side of the side joint is provided with a protrusion, the two side sealing gaskets are respectively arranged on the outer sides of the two side joints, the protrusion passes through the side sealing gaskets, the two side end covers are respectively arranged on the outer sides of the two side sealing gaskets, the two side end covers are respectively fixedly connected to the two ends of the insulating shell and press the two side joints and the two side sealing gaskets.

Images