Photovoltaic fuse type isolator with fusing indicating lamp

Abstract

The utility model discloses a photovoltaic fuse type isolator with a fusing indicating lamp, which relates to the technical field of signal isolators and comprises a shell with an upper opening, an inner cavity is arranged in the shell, and two groups of static contacts are symmetrically mounted at two ends of the inner cavity; a containing groove is formed in the top of the fuse carrier, a boss is integrally formed at the bottom of the containing groove, and a through hole penetrating through the outer wall of the bottom end of the containing groove is formed in the circle center of the boss. The horizontal push-pull fuse carrier can enable caps at two ends of the fuse link to be far away from a static contact in the base to form an obviously visible large-gap breakpoint, so that the isolation function of the isolator is enhanced, and potential safety hazards caused by small electrical gaps are thoroughly eliminated. And meanwhile, the static contact of the isolator is in better contact with the cap of the fuse link, so that the contact resistance between the static contact and the cap of the fuse link is lower, the performance of the fuse link is not greatly changed, and the terminal has low and stable temperature rise.

Description

Technical Field

[0001] The utility model relates to the technical field of signal isolators, in particular to a photovoltaic fuse isolator with a fuse indicator light. Background Art

[0002] The primary function of a photovoltaic fuse is to provide overload protection in a photovoltaic power plant. When an overload current flows through a photovoltaic cell array or inverter, the fuse instantly melts, disconnecting the circuit and preventing damage to circuit equipment. A photovoltaic fuse primarily consists of a photovoltaic fuse link and an isolator. The fuse link, installed within the isolator, acts as a protective element for overload or short-circuit protection. The isolator consists of a fuse carrier for loading and unloading the fuse link, a housing for securing the components, a socket for securing and supporting the fuse link, and terminal blocks. The terminal blocks connect the fuse link to the circuit. The fuse carrier includes a signal light holder for mounting a blown fuse indicator assembly. The signal light connects to the circuit through contact between the contact strip and the fuse cap. The isolator's primary function is to provide safety isolation within a photovoltaic power plant. When maintenance or repair of a photovoltaic cell array or inverter is required, the isolator can be operated to isolate the corresponding circuit, ensuring operator safety and preventing damage to circuit equipment.

[0003] The fuse carrier of the existing photovoltaic isolator uses a rotating structure with a fulcrum to achieve switching. When the fuse carrier is opened, the upper cap of the fuse separates from the static contact on the base, forming a breakpoint and realizing the isolation function. The breakpoint formed is a double breakpoint. The gap between the upper breakpoint and the static contact is large, while the gap between the lower breakpoint and the static contact is small. It is hidden inside the isolator and cannot be observed, posing a certain safety hazard. Secondly, when the fuse carrier of the existing photovoltaic isolator is loaded with a fuse and pushed in, due to the gap between the fuse and the fuse carrier, the contact surface between the fuse cap and the static contact on the base cannot reach the maximum, and the contact resistance cannot be reduced. In addition, the optical signals of the existing photovoltaic isolators with fuse indicator lights are all scattered and cannot form a light beam, and the fuse indication function is weak. Utility Model Content

[0004] The purpose of the present utility model is to provide a photovoltaic fuse isolator with a fuse indicator light in order to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a photovoltaic fuse-type isolator with a fuse indicator light, comprising a shell with an upper opening, an inner cavity provided inside the shell, and two groups of static contacts symmetrically installed at both ends of the inner cavity; a fuse carrier, a receiving groove provided on the top of the fuse carrier, a boss integrally formed at the bottom of the receiving groove, a through hole provided at the center of the boss and penetrating the outer wall of the bottom end of the receiving groove, an indicator lamp holder provided inside the fuse carrier, a cylindrical LED lamp holder provided at the upper end of the indicator lamp holder, and the top of the LED lamp holder being connected to the through hole; a fuse, the fuse being installed at the lower end of the static contact, the two ends of the fuse being respectively engaged with the two groups of static contacts; and a limiting guide assembly, the limiting guide assembly being provided between the fuse carrier and the inner cavity, and being used to form a retractable connection structure between the fuse carrier and the inner cavity so as to engage or separate the fuse and the static contact.

[0006] As a further solution of the present invention: the limiting guide assembly includes: two guide blocks symmetrically distributed at both ends of the bottom of the melt carrier, the guide blocks and the melt carrier being integrally formed; a guide groove opened between the guide block and the side wall of the melt carrier, the guide groove being a long rectangular groove; two first rails symmetrically arranged at the upper end of the inner wall of the inner cavity, the first rails being slidably connected along the length direction of the guide groove; and two groups of second rails symmetrically arranged at the lower end of the inner wall of the inner cavity, the guide block being located on the inner side of the second rail, and being used to provide limiting guidance for the movement of the melt carrier in the vertical direction.

[0007] As a further solution of the present invention: the LED lamp holder and the axis of the through hole are located on the same axis.

[0008] As a further solution of the present invention: a lampshade is provided inside the storage groove, one end of the lampshade is rotatably connected to the storage groove through an axle rod, and a handle is provided at the other end of the lampshade. When the lampshade is completely stored in the storage groove, the lampshade is in full contact with the boss.

[0009] As a further solution of the present invention: the lampshade is a transparent hard plastic part.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The horizontal push-pull fuse carrier can keep the caps at both ends of the fuse link away from the static contacts in the base, forming a clearly visible large gap breakpoint, thereby enhancing the isolation function of the isolator and completely eliminating the safety hazards caused by small electrical gaps.

[0012] The static contact of the isolator and the cap of the fuse have better contact, so that the contact resistance between them is lower, which can ensure that the performance of the fuse does not change significantly and the terminal has a low and stable temperature rise.

[0013] The optical signal generated by the brighter light beam allows for accurate judgment of the fuse link's operating status, avoiding misjudgments due to low light levels. Strong signal indication is particularly important for switchgear in well-lit environments. Promptly identifying and resolving circuit faults can prevent significant losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a schematic structural diagram of the melt carrier of the present invention in an open state;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the docking structure of the fuse carrier, the static contact and the fuse link of the present invention;

[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of the shell of the present utility model.

[0019] In the figure: 1. Shell; 11. Inner cavity; 2. Melt carrier; 21. Receiving slot; 3. Static contact; 4. Fuse link; 5. Lampshade; 6. Boss; 7. Indicator lamp holder; 71. LED lamp holder; 8. Through hole; 9. Limiting guide assembly; 901. Guide block; 902. Guide slot; 903. First track; 904. Second track. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 5In the embodiment of the utility model, a photovoltaic fuse isolator with a fuse indicator light comprises a shell 1 with an upper opening, an inner cavity 11 is provided inside the shell 1, and two sets of static contacts 3 are symmetrically installed at both ends of the inner cavity 11; a fuse carrier 2, a receiving groove 21 is provided on the top of the fuse carrier 2, a boss 6 is integrally formed at the bottom of the receiving groove 21, a through hole 8 is provided at the center of the boss 6 that passes through the outer wall of the bottom end of the receiving groove 21, an indicator lamp holder 7 is installed inside the fuse carrier 2, and the upper end of the indicator lamp holder 7 is provided with a A cylindrical LED lamp holder 71 is provided, the top of which is connected to the through-hole 8; a fuse 4 is mounted on the lower end of the static contact 3, with both ends of the fuse 4 respectively engaged with the two sets of static contacts 3; and a limit guide assembly 9 is provided between the fuse carrier 2 and the inner cavity 11, and is used to form a retractable connection structure between the fuse carrier 2 and the inner cavity 11, so that the fuse 4 and the static contact 3 are engaged or separated; the LED lamp holder 71 and the axis of the through-hole 8 are on the same axis.

[0022] In this embodiment, a horizontal push-pull connection structure is formed by providing a limiting guide assembly 9 between the fuse carrier 2 and the inner cavity 11. This allows the fuse link 4 to completely separate from the inner cavity 11 as the fuse carrier 2 is pulled out. This ensures that there is a sufficiently large electrical gap between the double breakpoint and the static contact 3 in the inner cavity 11, and the gap can be observed, completely eliminating the safety hazards caused by the small electrical gap.

[0023] Secondly, to enable the optical signal to form a beam, this solution first installs a cylindrical LED lamp holder 71 on the indicator lamp holder (it should be noted that the LED lamp holder 71 in this solution houses an LED, etc.). The cylindrical structure confines the light, forming a beam. The second step is to install a boss 6 coaxially with the fuse carrier 2 and the LED lamp holder 71. This boss 6 defines a through hole 8 that aligns with the central axis of the LED lamp holder 71. This alters the scattering state of the blown fuse indicator optical signal, forming a beam, improving the optical signal's recognizability and enhancing the indicator function.

[0024] Please refer to Figure 1-Figure 5 The limiting guide assembly 9 includes: two guide blocks 901 symmetrically distributed at both ends of the bottom of the melt carrier 2, the guide blocks 901 and the melt carrier 2 are integrally formed; a guide groove 902 is provided between the guide block 901 and the side wall of the melt carrier 2, the guide groove 902 is a long rectangular groove; two first rails 903 symmetrically arranged at the upper end of the inner wall of the inner cavity 11, the first rails 903 are slidably connected along the length direction of the guide groove 902; and two groups of second rails 904 symmetrically arranged at the lower end of the inner wall of the inner cavity 11, the guide block 901 is located on the inner side of the second rail 904, and is used to provide limiting guidance for the movement of the melt carrier 2 in the vertical direction.

[0025] In this embodiment, guide blocks 901 and guide slots 902 are provided on both sides of the fuse carrier. A first track 903 and a second track 904, which cooperate with these guide blocks 901 and slots 902, are provided on the inner wall of the inner cavity 11. The second track 904, located in the lower half of the inner wall of the inner cavity 11, serves to limit the movement of the fuse. The first track 903, located in the upper half of the inner wall of the inner cavity 11, serves as a guide. These three elements work together to ensure smooth and reliable extension and closing of the fuse carrier 2, allowing the fuse link 4 to be precisely inserted into the stationary contact 3. This ensures sufficient contact between the ends of the fuse link 4 and the stationary contact 3, further reducing contact resistance.

[0026] Please refer to Figure 1-Figure 5 A lampshade 5 is provided inside the storage groove 21. One end of the lampshade 5 is rotatably connected to the storage groove 21 through an axis, and a handle is provided at the other end of the lampshade 5. When the lampshade 5 is completely stored in the storage groove 21, the lampshade 5 is in full contact with the boss 6. The lampshade 5 is a transparent hard plastic part.

[0027] In this embodiment, the lampshade 5 has two functions. When fully folded and stored in the storage slot 21, it functions as a lampshade. The upper surface of the boss 6 contacts the transparent handle, which also functions as a lampshade, and further forms a continuous light channel with the LED lamp holder 71. This allows the light signal to form a high-brightness beam that is projected onto the transparent handle, thereby enhancing the indication function of the blown fuse signal. Conversely, when the lampshade 5 is removed, it can be used as a handle for withdrawing the fuse carrier 2.

[0028] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A photovoltaic fuse isolator with a fuse indicator light, characterized in that: include: A housing (1) with an upper opening, wherein an inner cavity (11) is provided inside the housing (1), and two sets of static contacts (3) are symmetrically mounted at both ends of the inner cavity (11); A melt carrier (2), wherein a receiving groove (21) is provided on the top of the melt carrier (2), a boss (6) is integrally formed on the bottom of the receiving groove (21), a through hole (8) is provided at the center of the boss (6) and passes through the outer wall of the bottom end of the receiving groove (21), an indicator lamp holder (7) is installed inside the melt carrier (2), a cylindrical LED lamp holder (71) is provided on the upper end of the indicator lamp holder (7), and the top of the LED lamp holder (71) is connected to the through hole (8); A fuse (4), the fuse (4) being mounted on the lower end of the static contact (3), with both ends of the fuse (4) being respectively engaged with the two groups of static contacts (3); and A position limiting guide assembly (9) is provided between the fuse carrier (2) and the inner cavity (11) and is used to form a pull-out connection structure between the fuse carrier (2) and the inner cavity (11) so as to enable the fuse element (4) and the static contact (3) to be connected or separated.

2. A photovoltaic fuse isolator with a fuse indicator light according to claim 1, characterized in that: The limiting guide assembly (9) comprises: Two guide blocks (901) symmetrically distributed at both ends of the bottom of the melt carrier (2), the guide blocks (901) and the melt carrier (2) being integrally formed; A guide groove (902) is provided between the guide block (901) and the side wall of the melt carrier (2), wherein the guide groove (902) is a long rectangular groove; Two first rails (903) are symmetrically arranged at the upper end of the inner wall of the inner cavity (11), and the first rails (903) are slidably connected along the length direction of the guide groove (902); and Two sets of second rails (904) are symmetrically arranged at the lower end of the inner wall of the inner cavity (11), and the guide block (901) is located inside the second rail (904) and is used to provide a limiting guide for the movement of the melt carrier (2) in the vertical direction.

3. A photovoltaic fuse isolator with a fuse indicator light according to claim 1, characterized in that: The LED lamp holder (71) and the axis of the through hole (8) are located on the same axis.

4. A photovoltaic fuse isolator with a fuse indicator light according to claim 1, characterized in that: A lampshade (5) is provided inside the storage groove (21), one end of the lampshade (5) is rotatably connected to the storage groove (21) via a shaft, and a handle is provided at the other end of the lampshade (5). When the lampshade (5) is completely stored in the storage groove (21), the lampshade (5) is in full contact with the boss (6).

5. A photovoltaic fuse isolator with a fuse indicator light according to claim 4, characterized in that: The lampshade (5) is a transparent hard plastic part.

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