High-voltage fuse for photovoltaic system

Abstract

The utility model relates to the field of fuses, in particular to a high-voltage fuse for a photovoltaic system, which comprises a shell, a fuse link for realizing fusing protection is arranged in the shell, an operation through groove is formed in the shell, a handle is rotatably arranged in the operation through groove, an indicator light module is arranged on the handle, and the indicator light module is connected with the shell. The positive electrode and the negative electrode of the indicating lamp module are connected with the two ends of the fuse link in parallel, so that after the fuse link is fused, the indicating lamp module is turned on. The device has the advantages of being convenient to maintain and replace and easy to operate.

Description

Technical Field

[0001] This application relates to the field of fuses, and in particular to a high-voltage fuse for a photovoltaic system. Background Art

[0002] When a high-voltage fuse is applied to a DC2000V photovoltaic system, the fuse adapted to this voltage is relatively large in size, and it is difficult to observe whether the fuse is blown. For a small number of fuses equipped with indicator lights, if you want to repair or replace the indicator lights, you must disassemble the housing, which is troublesome to repair and replace, and the operation is cumbersome. Summary of the Utility Model

[0003] In order to improve the problem, this application provides a high-voltage fuse for a photovoltaic system.

[0004] A high-voltage fuse for a photovoltaic system provided by this application adopts the following technical solutions:

[0005] A high-voltage fuse for a photovoltaic system includes a housing, a fuse element for achieving fusing protection is arranged in the housing, an operation through slot is opened on the housing, a handle is rotatably arranged in the operation through slot, an indicator light module is arranged on the handle, and the positive and negative poles of the indicator light module are connected in parallel with both ends of the fuse element, so that after the fuse element is blown, the indicator light module is turned on and lights up.

[0006] By adopting the above technical solutions, after the fuse element is blown, it is prompted by the lighting of the indicator light module, which is convenient for observing the fusing state. When maintenance is required, the handle is rotated to turn the fuse element out of the housing for replacement, which is convenient, fast, simple in operation, and improves efficiency.

[0007] Optionally, a plurality of conductive clamping pieces are arranged in the housing, the fuse element is arranged on the handle, and the plurality of conductive clamping pieces are used for clamping and electrically connecting to both ends of the fuse element. An inclined guiding piece is formed at the end of the conductive clamping piece, and the inclined guiding piece is used for the fuse element to abut against and open the conductive clamping piece.

[0008] By adopting the above technical solutions, the inclined guiding piece enables the fuse element to accurately enter between the conductive clamping pieces when the handle rotates, which is convenient for the conductive clamping pieces to clamp the fuse element for conduction.

[0009] Optionally, a fuse cavity for the fuse element to slide into and install is opened on the handle, and a elastic piece is arranged on the inner wall of the fuse cavity, and the elastic piece is used to press the fuse element against the inner wall of the fuse cavity.

[0010] By adopting the above technical solutions, the elastic piece presses the fuse element only in the fuse cavity, improving the stability of the fuse element.

[0011] Optionally, a top block is provided on the inner wall of the fusing cavity, and a flared inclined surface is formed on the inner wall of the fusing cavity. The flared inclined surface is used to guide the fuse body into the fusing cavity, and the top block is used to abut and limit the end of the fuse body in the fusing cavity.

[0012] By adopting the above technical solution, the fuse body can be more easily inserted into the fusing cavity through the flared inclined surface without the need for precise alignment, which plays a role in guiding the insertion direction. After the fuse body is inserted into the fusing cavity, the fuse body is pressed tightly against the top block by the elastic piece, making it difficult for the fuse body to slide directly. If it needs to slide, it needs to first overcome the elastic force of the elastic piece and change the direction before being pulled out, further improving the stability.

[0013] Optionally, an installation groove is further provided on the handle. The indicator light module includes an indicator light component for conducting and emitting light and a conductive component. The conductive component is used to conduct the indicator light component and the fuse body, and a cover for covering the opening of the installation groove is further provided on the handle.

[0014] By adopting the above technical solution, covering the installation groove plays a role in protecting the indicator light module and also plays a stabilizing role, reducing the probability of the indicator light module falling out of the installation groove and improving the stability.

[0015] Optionally, support columns are provided on the inner wall of the installation groove. The conductive component includes a filament compression spring sleeved on the support column, and the filament compression spring is used to provide an elastic force pressing against the fuse body.

[0016] By adopting the above technical solution, elasticity is provided by the filament compression spring, making the indicator light module press tightly against the fuse body for power-on more stable.

[0017] Optionally, the conductive component includes a conductive rod provided on the filament compression spring. A power-on through groove for the conductive rod to extend into is formed through the inner wall of the fusing cavity. A guiding inclined rod is formed at the end of the conductive rod, and the guiding inclined rod is used for the fuse body to abut against, so that the conductive rod retracts into the power-on through groove and presses tightly against the fuse body.

[0018] By adopting the above technical solution, the fuse body is pressed tightly by the conductive rod, and the guiding inclined rod gives way when the fuse body is inserted into the fusing cavity, reducing damage caused by the bending of the conductive rod due to the abutment during the insertion of the fuse body. While playing a protective role, it also plays a role in pressing tightly to improve the power-on stability.

[0019] Optionally, a force dividing member is provided on the inner wall of the installation groove. The force dividing member is used to abut against the conductive rod, and when the fuse body pushes the conductive rod, the conductive rod abuts against the force dividing member.

[0020] By adopting the above technical solution, the force on the conductive rod acts on the force dividing member through the force dividing member, rather than on the support column, reducing the probability that the force on the conductive rod acts on the filament compression spring, resulting in an increase in the torsional force and ultimately damaging the filament compression spring or the support column, thus playing a protective role.

[0021] Optionally, the indicator light assembly includes a light emitting member for emitting light when powered on and a lamp housing. The lamp housing is embedded through the side wall of the handle, and the lamp housing is used to converge and irradiate the light emitted by the light emitting member to the outside of the handle and the housing.

[0022] By adopting the above technical solution, the light emitted by the light emitting member is emitted through the lamp housing, reducing the probability of risks caused by the light emitting member electrically connected in the circuit directly penetrating the side wall of the handle and being exposed to the air. The lamp housing plays a protective role and also an indicating role.

[0023] Optionally, an observation window is penetrated and opened on the side wall of the handle. The observation window is communicated with the installation groove, and the observation window is used to align with the indicator light assembly or the conductive assembly for observation.

[0024] By adopting the above technical solution, it is convenient for the staff to observe through the observation window, so that it is possible to observe whether the indicator light module is installed without disassembly, which is convenient and fast.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. It is convenient to observe the fusing state, and it is more convenient, faster, simpler in operation and more efficient for maintenance.

[0027] 2. Improve the stability of the fuse link.

[0028] 3. Improve the stability of the indicator light module. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is an overall structural schematic diagram of a high-voltage fuse for a photovoltaic system in an embodiment of the present application.

[0030] Figure 2 is an exploded structural schematic diagram highlighting the fuse link.

[0031] Figure 3 is a structural schematic diagram highlighting the handle.

[0032] Description of reference numerals: 1. Housing; 11. Fuse element; 12. Operation slot; 13. Handle; 14. Indicator light module; 141. Indicator light assembly; 142. Conductive assembly; 143. Filament compression spring; 144. Conductive rod; 145. Guide inclined rod; 2. Conductive clip; 21. Inclined guide piece; 22. Fuse cavity; 23. Elastic piece; 24. Top block; 25. Flared inclined surface; 3. Installation groove; 31. Cover; 32. Power-on slot; 33. Support column; 34. Force dividing member; 341. Force dividing column; 342. Force dividing plate; 4. Light-emitting member; 41. Lamp housing; 42. Observation window. Detailed implementation manners

[0033] The following further describes this application in detail with reference to the Figures 1-3 accompanying drawings.

[0034] An embodiment of this application discloses a high-voltage fuse for a photovoltaic system. Refer to Figure 1 and Figure 2 , the high-voltage fuse for a photovoltaic system includes a housing 1, a fuse element 11 for achieving fuse protection is installed in the housing 1, an operation slot 12 is opened on the housing 1, a handle 13 is rotatably arranged in the operation slot 12, the fuse element 11 is installed on the handle 13, and an indicator light module 14 for lighting indication is further installed on the handle 13. The positive and negative poles of the indicator light module 14 are connected in parallel with both ends of the fuse element 11, so that after the fuse element 11 melts, the indicator light module 14 is turned on and lights up.

[0035] Refer to Figure 2 and Figure 3 , when the handle 13 rotates to be inside the housing 1, the outer side wall of the handle 13 is flush with the opening surface of the operation slot 12. The length direction of the handle 13 extends along the opening direction of the operation slot 12, while the rotation axis of the handle 13 extends along the thickness direction of the handle 13, and the width direction of the handle 13 is the direction of penetrating into the housing 1. A fuse cavity 22 and an installation groove 3 are opened on the handle 13. The fuse cavity 22 and the installation groove 3 are distributed along the width direction of the handle 13. The fuse cavity 22 is used for installation. The fuse cavity 22 extends along the length direction of the handle 13, and the opening for inserting the fuse element 11 of the fuse cavity 22 is on the side wall of the end of the handle 13 away from the rotation axis, that is, when the handle 13 rotates, the opening of the fuse cavity 22 is lifted out.

[0036] Refer to Figure 2 and Figure 3, the fusing cavity 22 is a cylindrical groove for inserting a cylindrical fusing body 11 of a mobile phone. The opening of the fusing cavity 22 is flared, and a flared inclined surface 25 is formed on the inner wall around the opening surface of the fusing cavity 22. That is, the closer to the opening of the fusing cavity 22, the larger the cross-sectional diameter of the fusing cavity 22 formed by the flared inclined surface 25. A top block 24 is fixedly connected to the inner wall of the fusing cavity 22 opposite to the flared inclined surface 25. That is, after the fusing body 11 is completely inserted into the fusing cavity 22, the end of the fusing body 11 in the length direction abuts against the top block 24. A elastic piece 23 is fixedly connected to the flared inclined surface 25. The elastic piece 23 is made of an elastic material, such as plastic. The elastic piece 23 pops out towards the inner wall of the fusing cavity 22 in the direction close to the top block 24, so as to press the fusing body 11 against the inner wall of the fusing cavity 22 in the direction of the top block 24, so that the top block 24 abuts against the fusing body 11, making it difficult to pull out the fusing body 11.

[0037] Refer to Figure 2 , four conductive clip pieces 2 are fixedly connected inside the housing 1. Every two conductive clip pieces 2 form a group. The two groups of conductive clip pieces 2 respectively correspond to two external connecting wires on the housing 1. That is, one group of conductive clip pieces 2 is electrically connected to the incoming line end of the housing 1, and the other group of conductive clip pieces 2 is electrically connected to the outgoing line end of the housing 1. An inclined guiding piece 21 is integrally formed at the end of the conductive clip piece 2. The inclined guiding pieces 21 on the same group of conductive clip pieces 2 are bent in the direction of moving away from each other as they are farther away from the conductive clip piece 2 where they are located. When the handle 13 is turned into the housing 1, it drives the fusing body 11 to abut against the inclined guiding piece 21 to open the conductive clip pieces 2 of the same group, so that both ends of the fusing body 11 enter the two groups of conductive clip pieces 2 respectively for clamping and electrical connection.

[0038] Refer to Figure 2 And Figure 3 , the indicator light module 14 includes an indicator light component 141 for conducting and emitting light and a conductive component 142. The conductive component 142 is used to conduct the indicator light component 141 and the fusing body 11. A lid 31 for covering the opening of the installation groove 3 is also provided on the handle 13. The conductive component 142 includes a filament compression spring 143 and a conductive rod 144. The indicator light component 141 includes a PCBA board, a light emitting component 4 and a lamp housing 41. The light emitting component 4 uses a surface mount non-polar LED lamp. A plurality of surface mount resistors connected in series with the light emitting component 4 are also electrically connected to the PCBA board.

[0039] Refer to Figure 2 And Figure 3 , the PCBA board is installed at the middle position of the installation groove 3. The lamp housing 41 is penetrated and fitted on the side wall of the handle 13, and the side wall of the handle 13 penetrated by the lamp housing 41 is always outside the housing 1. This side wall is the side wall of the handle 13 that is flush with the opening surface of the operation through groove 12 when the handle 13 is turned into the housing 1. The part of the lamp housing 41 in the installation groove 3 is used to receive the light emitted by the light emitting component 4, and after polymerization, it irradiates to the outside of the handle 13 through the end of the lamp housing 41 outside the handle 13.

[0040] Refer to Figure 2 and Figure 3 On the inner wall of the installation groove 3, two support columns 33 are fixedly connected. The two support columns 33 are respectively on both sides of the PCBA board, and the two support columns 33 are respectively close to both ends of the fuse body 11. The filament compression spring 143 is sleeved on the support column 33. Two conductive rods 144 correspond to one filament compression spring 143, that is, the two conductive rods 144 are respectively fixedly connected to both ends of the filament compression spring 143. One of the conductive rods 144 at both ends of the filament compression spring 143 is electrically connected to the PCBA board, and the other is used to contact and conduct electricity with the fuse body 11. The filament compression spring 143 sleeved on the support column 33 is used to provide an elastic force for the conductive rod 144 in contact with the fuse body 11 to press tightly against the fuse body 11.

[0041] Refer to Figure 2 and Figure 3 On the inner wall of the fuse cavity 22, two power-on through grooves 32 for the conductive rods 144 to extend into are penetrated. The end of the conductive rod 144 extends into the fuse cavity 22 through the power-on through groove 32, and the two power-on through grooves 32 respectively correspond to both ends of the fuse body 11, that is, the two conductive rods 144 on the two filament compression springs 143 away from the PCBA board are respectively used to enter the fuse cavity 22 through the two power-on through grooves 32 and then contact both ends of the fuse body 11. And a guiding inclined rod 145 is formed on the end of the conductive rod 144 in the fuse cavity 22. The guiding inclined rod 145 is formed on the ends of the two conductive rods 144 in the fuse cavity 22 that are away from each other, and the two guiding inclined rods 145 extend obliquely in the direction of getting closer to the power-on through groove 32 as they are farther away from the conductive rod 144. The guiding inclined rod 145 is used to be contacted when the fuse body 11 is inserted into the fuse cavity 22, so that the conductive rod 144 retracts into the power-on through groove 32 and presses tightly against the fuse body 11.

[0042] Refer to Figure 2 and Figure 3 On the inner wall of the installation groove 3, a force dividing member 34 is fixedly connected. The force dividing member 34 includes a force dividing column 341 and a force dividing plate 342. The force dividing column 341 is fixedly connected at a position away from the opening of the fuse cavity 22, and the corresponding conductive rod 144 passes through from the side of the force dividing column 341 close to the power-on through groove 32 and enters the power-on through groove 32. When the conductive rod 144 is contacted by the fuse body 11 here, the conductive rod 144 is lifted up and contacts the force dividing column 341 to prevent the conductive rod 144 from continuing to displace. The force dividing plate 342 is fixedly connected at a position close to the opening of the fuse cavity 22, and the corresponding conductive rod 144 passes through from the side of the force dividing plate 342 close to the power-on through groove 32 and enters the power-on through groove 32. When the conductive rod 144 is contacted by the fuse body 11 here, the conductive rod 144 is lifted up and contacts the force dividing plate 342 to prevent the conductive rod 144 from continuing to displace. The force dividing plate 342 contacts the middle position of the conductive rod 144.

[0043] Reference Figure 3 , an observation window 42 is penetrated and opened on the side wall of the handle 13, and the observation window 42 communicates with the installation groove 3. The observation window 42 is used to align with the conductive rod 144 for observation.

[0044] The implementation principle of a high-voltage fuse for a photovoltaic system according to an embodiment of the present application is as follows: When the fuse link 11 needs to be installed, first rotate the handle 13 to turn the opening of the fuse cavity 22 out of the housing 1, and then the fuse link 11 is obliquely inserted into the fuse cavity 22 from the flared slope 25. At the same time, the end of the fuse link 11 abuts against the guiding inclined rod 145 to push up the conductive rod 144, and the conductive rod 144 is pressed tightly against the fuse link 11. When the fuse link 11 is completely pushed into the fuse cavity 22, the elastic piece 23 presses the fuse link 11 tightly in the fuse cavity 22, and the top block 24 abuts against the end of the fuse link 11, and the two conductive rods 144 are respectively pressed tightly against both ends of the fuse link 11.

[0045] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A high voltage fuse for a photovoltaic system, characterized in that: The invention comprises a housing (1), wherein a fuse (11) for realizing fuse protection is arranged in the housing (1), an operation slot (12) is provided on the housing (1), a handle (13) is rotatably arranged in the operation slot (12), an indicator light module (14) is arranged on the handle (13), and a positive and negative poles of the indicator light module (14) are connected in parallel with two ends of the fuse (11), so that after the fuse (11) is blown, the indicator light module (14) is turned on and lights up.

2. A high voltage fuse for a photovoltaic system according to claim 1, characterized in that: A plurality of conductive clips (2) are arranged in the housing (1), the fuse (11) is arranged on the handle (13), the plurality of conductive clips (2) are used to clamp and electrically connect the two ends of the fuse (11), and an inclined guide piece (21) is formed on the end of the conductive clip (2), and the inclined guide piece (21) is used for the fuse (11) to contact and open the conductive clip (2).

3. A high voltage fuse for a photovoltaic system according to claim 1, characterized in that: The handle (13) is provided with a fuse cavity (22) for the fuse (11) to slide into and be installed, and an elastic sheet (23) is provided on the inner wall of the fuse cavity (22), and the elastic sheet (23) is used to press the fuse (11) against the inner wall of the fuse cavity (22).

4. A high voltage fuse for a photovoltaic system according to claim 3, characterized in that: A top block (24) is arranged on the inner wall of the fuse cavity (22), and a flaring inclined surface (25) is formed on the inner wall of the fuse cavity (22). The flaring inclined surface (25) is used to guide the fuse (11) into the fuse cavity (22), and the top block (24) is used to abut and limit the end of the fuse (11) in the fuse cavity (22).

5. A high voltage fuse for a photovoltaic system according to claim 3, characterized in that: The handle (13) is also provided with a mounting groove (3). The indicator light module (14) comprises an indicator light component (141) for conducting and emitting light, and a conductive component (142). The conductive component (142) is used to conduct the indicator light component (141) and the fuse (11). The handle (13) is also provided with a cover (31) for covering the opening of the mounting groove (3).

6. A high voltage fuse for a photovoltaic system according to claim 5, characterized in that: A support column (33) is provided on the inner wall of the installation groove (3), and the conductive component (142) comprises a filamentary compression spring (143) for sleeved on the support column (33), and the filamentary compression spring (143) is used to provide an elastic force against the fuse (11).

7. A high voltage fuse for a photovoltaic system according to claim 6, characterized in that: The conductive component (142) comprises a conductive rod (144) arranged on the filamentary compression spring (143); an energizing slot (32) for the conductive rod (144) to extend into is formed through the inner wall of the fuse cavity (22); a guiding inclined rod (145) is formed on the end of the conductive rod (144); the guiding inclined rod (145) is used for the fuse (11) to abut against, so that the conductive rod (144) is retracted into the energizing slot (32) and abuts against the fuse (11).

8. A high voltage fuse for a photovoltaic system according to claim 7, characterized in that: A force component (34) is provided on the inner wall of the installation groove (3), and the force component (34) is used to abut against the conductive rod (144). When the fuse (11) pushes the conductive rod (144), the conductive rod (144) abuts against the force component (34).

9. A high voltage fuse for a photovoltaic system according to claim 5, characterized in that: The indicator light assembly (141) comprises a light-emitting element (4) for emitting light when powered on, and a lamp housing (41); the lamp housing (41) penetrates and is embedded in the side wall of the handle (13); the lamp housing (41) is used to irradiate light emitted by the light-emitting element (4) onto the handle (13) and the outside of the housing (1).

10. A high voltage fuse for a photovoltaic system according to claim 5, characterized in that: An observation window (42) is provided through the side wall of the handle (13), the observation window (42) being in communication with the mounting slot (3), and the observation window (42) being used to align with the indicator light assembly (141) or the conductive assembly (142) for observation.

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