Circuit protection device of power regulator in photovoltaic power generation system

Abstract

The utility model relates to the technical field of circuit safety protection, in particular to a circuit protection device of a power regulator in a photovoltaic power generation system, which comprises an installation assembly, a protection assembly, a power supply assembly and a power supply assembly. Wherein the protection assembly comprises a fuse link and a base used for fixing the fuse link; the fuse link comprises a fusion tube, a fuse element arranged in the fusion tube, and contact knives which are symmetrically arranged at two ends of the fusion tube and are connected with the fuse element; the elastic metal snap ring is arranged to provide clamping force for the contact knife, the snap ring is detachably connected with the clamping piece, the through hole, the mounting groove and the limiting groove are formed in the clamping piece, fixed mounting and dismounting of the snap ring are facilitated, meanwhile, the stability of the snap ring after mounting is guaranteed, and by means of the arrangement, when the snap ring is not enough in clamping force due to abrasion and needs to be replaced, the snap ring can be replaced conveniently and quickly. And the power transmission line or the whole mounting base does not need to be disassembled.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit safety protection, in particular to a circuit protection device of a power regulator in a photovoltaic power generation system. Background Art

[0002] The power conditioner can convert the direct current generated by the photovoltaic panels into alternating current in the photovoltaic power generation system. At the same time, the power conditioner can also control the output power of the photovoltaic power generation system to ensure the stable operation of the system. In addition, the power conditioner can also play a role in power regulation and power optimization in the photovoltaic power generation system. By adjusting the working mode of the power conditioner, the output power of the photovoltaic system can be effectively controlled to better adapt to the grid load requirements and improve the power generation efficiency of the photovoltaic system.

[0003] Fuses play an important role in protecting circuits and equipment in power conditioners. In power conditioners, fuses are usually used to prevent damage caused by circuit overload or short circuit, and to protect power conditioners and other related equipment from damage. When the current in the circuit exceeds the rated current capacity of the fuse, the fuse will quickly disconnect the circuit, cut off the current, and prevent overcurrent from damaging the power conditioner and other electrical equipment. Ensure the safety of the power conditioner and the safe operation of the entire photovoltaic power generation system.

[0004] At present, square tube knife-type contact fuses are all installed in an inserted manner on the base. After installation, they are clamped and fixed by terminal clips at both ends of the base. Special removal tools are usually used for disassembly, and removal requires a pulling and pulling operation. Therefore, after replacing the fuse many times, the terminal clips are worn and the clamping force is insufficient, resulting in insensitive contact between the terminal clips and the fuse contacts, which need to be replaced. The terminals of existing fuse mounting bases are all integrated structures, which means that when disassembling, it is necessary to unscrew the threads connected to the transmission line and reconnect the transmission line after replacement, and the operation steps are cumbersome. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the problem that the terminal clips of the above-mentioned existing fuse mounting base have insufficient clamping force after being worn and need to be replaced, and the integrated terminal replacement process has complicated operation steps, the present utility model is proposed.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a circuit protection device of a power conditioner in a photovoltaic power generation system, comprising an installation component, which includes a cabinet and a mounting rail arranged in the cabinet, and a protection component for ensuring circuit safety is arranged on the mounting rail; wherein the protection component includes a fuse and a base for fixing the fuse; the fuse includes a fuse tube, a fuse element arranged in the fuse tube, and contact knives symmetrically arranged at both ends of the fuse tube and connected to the fuse element.

[0008] As a preferred solution of the circuit protection device of the power conditioner in the photovoltaic power generation system of the utility model, wherein: the base includes a seat body slidably connected to the mounting rail, and two symmetrically arranged embedding grooves are provided at both ends of the side of the seat body away from the mounting rail, and a power connection plate is provided in the embedding groove; one end of the power connection plate extends out of the embedding groove and is provided with a through hole, and the other end of the power connection plate is bent twice into a "V" shape and embedded in the embedding groove.

[0009] As a preferred solution of the circuit protection device of the power conditioner in the photovoltaic power generation system of the utility model, wherein: the embedding groove includes a triangular portion, and embedding portions opened on two symmetrical inclined surfaces of the triangular portion; the power connection plate includes a straight section, a primary bending section and a secondary bending section connected in sequence, a door-shaped groove is cut out in the middle of the primary bending section, the square plate surrounded by the door-shaped groove is connected to the secondary bending section and is symmetrical with the secondary bending section after bending, and the square plate and the secondary bending section are placed in the embedding portion.

[0010] As a preferred solution of the circuit protection device of the power conditioner in the photovoltaic power generation system of the utility model, wherein: a clamping member is provided on the side of the power connection plate away from the seat body, and the clamping member includes two structurally symmetrical clamping parts, and an annular connecting part connected between the two clamping parts; an insertion gap for the contact knife is provided between the two clamping parts, and a clamping ring with a notch is provided between the two clamping parts.

[0011] As a preferred solution of the circuit protection device of the power conditioner in the photovoltaic power generation system of the utility model, wherein: the clamping part is provided with a through hole, the bottom end of the side wall of the clamping part is provided with a mounting groove, and a limiting groove is provided at the bottom of the mounting groove; the clamping ring is an elastic metal ring, the clamping end of the clamping ring passes through the through hole on the corresponding clamping part and provides clamping force for the contact knife, and the ring body of the clamping ring passes through the mounting groove and is embedded in the limiting groove.

[0012] As a preferred solution of the circuit protection device of the power conditioner in the photovoltaic power generation system of the utility model, wherein: a conductive member is arranged between the power contact plate and the clamping member, and the conductive member includes a pressing portion inserted into the fitting groove, and a supporting portion arranged on a side of the pressing portion extending out of the fitting groove; a long groove with an open end is arranged at the connection between the supporting portion and the pressing portion, and the annular connecting portion of the power contact plate is inserted into the long groove, and the supporting portion and the annular connecting portion are respectively formed with a circular hole that can be connected to each other, and the clamping member and the conductive member are fixedly connected by bolts.

[0013] As a preferred solution of the circuit protection device of the power conditioner in the photovoltaic power generation system of the utility model, two symmetrically arranged elastic clips are provided on the side of the pressing part away from the supporting part, and parts of the elastic clips are placed in the embedded part.

[0014] As a preferred solution of the circuit protection device of the power conditioner in the photovoltaic power generation system of the utility model, wherein: a receiving groove for accommodating the fuse is also provided on the side of the seat body away from the mounting rail, and the receiving groove is located between the two engaging grooves.

[0015] As a preferred solution of the circuit protection device of the power conditioner in the photovoltaic power generation system described in the utility model, the base is also provided with a connection unit for connecting to another identical base, and the connection unit includes a plug-in slot arranged on one side of the base, and a plug-in block arranged on a side of the base opposite to the plug-in slot and consistent with the contour of the plug-in slot.

[0016] As a preferred solution of the circuit protection device of the power conditioner in the photovoltaic power generation system of the utility model, wherein: a sliding groove which slidably cooperates with the mounting rail is provided on one side of the seat body adjacent to the mounting rail.

[0017] The beneficial effects of the utility model are as follows: the utility model provides clamping force for the touch knife by arranging an elastic metal clamping ring, and the clamping ring is detachably connected to the clamping part. By providing a through hole, an installation groove and a limit groove on the clamping part, the fixed installation and disassembly of the clamping ring are convenient, and the stability of the clamping ring after installation is guaranteed. With such an arrangement, when the clamping ring has insufficient clamping force due to wear and needs to be replaced, it can be removed independently for replacement without disassembling the power transmission line or the entire installation base. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a structural schematic diagram of the protective component in the utility model.

[0021] Figure 3 It is a structural schematic diagram of a single base in the utility model.

[0022] Figure 4 It is a structural schematic diagram of the seat body in the utility model.

[0023] Figure 5 It is a partial structural schematic diagram of the seat body in the utility model.

[0024] Figure 6 It is a structural schematic diagram of the electrical connection plate in the utility model.

[0025] Figure 7 It is a structural schematic diagram of the clamping member in the utility model.

[0026] Figure 8 It is a structural schematic diagram of the conducting member in the utility model. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0031] Example 1

[0032] Reference Figure 1 to Figure 3 , which is the first embodiment of the utility model, provides a circuit protection device for a power conditioner in a photovoltaic power generation system, including an installation component 100 and a protection component 200, wherein the installation component 100 includes a cabinet 101, and a mounting rail 102 arranged in the cabinet 101, and the mounting rail 102 is provided with the protection component 200, and the protection component 200 is electrically connected to the power conditioner through a wire to ensure circuit safety.

[0033] Furthermore, the protection assembly 200 includes a fuse 201 and a base 202 for fixing the fuse 201. The fuse 201 includes a fuse tube 201a, a fuse element (not shown) arranged in the fuse tube 201a, and contact blades 201b symmetrically arranged at both ends of the fuse tube 201a and connected to the fuse element.

[0034] Specifically, the fuse tube 201a is made of insulating material, which plays a role in protecting the fuse element and preventing contact electric shock. The two contact blades 201b are respectively connected to the power conditioner and the external circuit. The fuse element is made of a conductor material with higher resistance. When an overload, short circuit, or current exceeds the rated value, the fuse element will melt due to heat, cutting off the circuit to protect the circuit safety.

[0035] Furthermore, the base 202 includes a base body 202 a slidably connected to the mounting rail 102 . The base body 202 a is made of insulating material and is used to support and fix the fuse 201 .

[0036] Specifically, two symmetrically arranged engaging grooves 202a - 1 are provided at both ends of the side of the seat body 202a away from the mounting guide rail 102 , a power connection plate 203 is provided in the engaging groove 202a - 1 , a clamping member 204 is provided on the side of the power connection plate 203 away from the seat body 202a , and a conducting member 205 is provided between the power connection plate 203 and the clamping member 204 .

[0037] Specifically, in order to facilitate wiring, one end of the contact piece 203 extends out of the fitting groove 202a-1 and is provided with a through hole H, the other end of the contact piece 203 is bent twice into a "V" shape and is embedded in the fitting groove 202a-1, and the end of the contact piece 203 extending out of the fitting groove 202a-1 is connected to the wire through a wire fixing bolt; the clamping member 204 provides a clamping force for the contact blade 201b, thereby fixing the fuse 201; the contact piece 203, the conductive member 205 and the clamping member 204 are all made of conductive materials, and the conductive member 205 is used to fix the clamping member 204 and transfer the current between the contact piece 203 and the clamping member 204, so as to ensure that the line is connected after the fuse 201 is installed.

[0038] Specifically, a receiving groove 202a-2 for accommodating the fuse 201 is provided on the side of the seat body 202a facing away from the mounting rail 102, and the receiving groove 202a-2 is located between the two engaging grooves 202a-1; a sliding groove 202a-4 that slides with the mounting rail 102 is provided on the side of the seat body 202a adjacent to the mounting rail 102.

[0039] Example 2

[0040] Reference Figure 3 to Figure 8 , which is the second embodiment of the utility model. This embodiment is different from the first embodiment in that: the fitting groove 202a-1 includes a triangular portion 202a-1a, and fitting portions 202a-1b opened on two symmetrical inclined surfaces of the triangular portion 202a-1a; the power connection plate 203 includes a straight section 203a, a primary bending section 203b and a secondary bending section 203c connected in sequence, a door-shaped groove 203b-1 is cut out in the middle of the primary bending section 203b, and a square piece 203b-2 surrounded by the door-shaped groove 203b-1 is connected to the secondary bending section 203c and has a symmetrical structure with the secondary bending section 203c after bending, and the square piece 203b-2 and the secondary bending section 203c are placed in the fitting portion 202a-1b.

[0041] Specifically, refer to Figure 4 and Figure 6 The power connection piece 203 is installed by snap-fitting with the engaging groove 202a-1. After installation, the engaging portion 202a-1b limits the square piece 203b-2 and the secondary bending section 203c, so that the power connection piece 203 is fixedly installed.

[0042] Furthermore, in order to facilitate fixing of the fuse 201, the clamping member 204 includes two symmetrical clamping parts 204a and an annular connecting part 204b connected between the two clamping parts 204a; an insertion gap for the contact blade 201b is provided between the two clamping parts 204a, and a clamping ring 204c with a notch is provided between the two clamping parts 204a.

[0043] Furthermore, in order to facilitate the installation of the snap ring 204c, the clamping portion 204a is provided with a through hole 204a-1, the bottom end of the side wall of the clamping portion 204a is provided with an installation groove 204a-2, and a limiting groove 204a-3 is provided at the bottom of the installation groove 204a-2; the snap ring 204c is an elastic metal ring, the clamping end of the snap ring 204c passes through the through hole 204a-1 on the corresponding clamping portion 204a and provides clamping force for the contact knife 201b, the ring body of the snap ring 204c passes through the installation groove 204a-2 and is embedded in the limiting groove 204a-3, and at least two snap rings 204c are provided on each clamping member 204.

[0044] Specifically, the contacts at both ends of the fuse tube 201a are installed in the gap between the corresponding two clamping parts 204a in an inserted manner, and the clamping end of the clamping ring 204c abuts against the side wall of the contact and provides clamping force for the contact blade 201b. The clamping is reliable, and the fuse body 201 is not easy to fall off after clamping.

[0045] Furthermore, in order to install and fix the clamping member 204, the conductive member 205 includes a pressing portion 205a inserted into the fitting groove 202a-1, and a supporting portion 205b disposed on a side of the pressing portion 205a extending out of the fitting groove 202a-1.

[0046] Furthermore, a long groove 205a-1 with one end open is provided at the connection between the supporting portion 205b and the pressing portion 205a, and the annular connecting portion 204b of the power connection plate 203 is inserted into the long groove 205a-1. The supporting portion 205b and the annular connecting portion 204b are each formed with a circular hole K that can communicate with each other, and the clamping member 204 and the conductive member 205 are fixedly connected by bolts.

[0047] Furthermore, two symmetrically arranged elastic clips 205c are provided on one side of the pressing portion 205a away from the supporting portion 205b, and part of the elastic clip 205c is inserted into the fitting portion 202a-1b, so that after installation, the fitting portion 202a-1b limits the elastic clip 205c, that is, limits the conductive member 205, so that the conductive member 205 is fixed, and after installation, the elastic clip 205c is against the power connection plate 203, so that current can flow between the power connection plate 203, the conductive member 205 and the clamping member 204.

[0048] The remaining structures are the same as those of Example 1.

[0049] Example 3

[0050] Reference Figure 2 and Figure 3 , which is the third embodiment of the utility model. This embodiment is different from the second embodiment in that a connecting unit for connecting another identical seat 202a is further provided on the seat body 202a, and the connecting unit includes a plug-in slot 202a-3a provided on one side of the seat body 202a, and a plug-in block 202a-3b provided on a side of the seat body 202a opposite to the plug-in slot 202a-3a and having the same contour as the plug-in slot 202a-3a.

[0051] Specifically, during installation, the seat body 202a with the plug-in block 202a-3b is inserted into the plug-in slot 202a-3a of the adjacent seat body 202a to complete the docking installation. The plug-in slot 202a-3a and the plug-in block 202a-3b are clearance-matched and easy to disassemble.

[0052] The remaining structure is the same as that of Example 2.

[0053] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0054] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0055] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A circuit protection device for a power conditioner in a photovoltaic power generation system, characterized in that: include, An installation component (100) comprising a cabinet (101) and an installation rail (102) arranged in the cabinet (101), wherein a protection component (200) for ensuring circuit safety is arranged on the installation rail (102); The protection component (200) comprises a fuse (201) and a base (202) for fixing the fuse (201); The fuse (201) comprises a fuse tube (201a), a fuse element arranged in the fuse tube (201a), and contact blades (201b) symmetrically arranged at two ends of the fuse tube (201a) and connected to the fuse element.

2. The circuit protection device of the power conditioner in the photovoltaic power generation system according to claim 1, characterized in that: The base (202) comprises a base body (202a) slidably connected to the mounting rail (102), two symmetrically arranged engaging grooves (202a-1) are provided at two ends of a side of the base body (202a) away from the mounting rail (102), and a power connection sheet (203) is provided in the engaging groove (202a-1); One end of the power connection plate (203) extends out of the engaging groove (202a-1) and is provided with a through hole (H); the other end of the power connection plate (203) is bent twice to form a "V" shape and is embedded in the engaging groove (202a-1).

3. The circuit protection device of the power conditioner in the photovoltaic power generation system according to claim 2, characterized in that: The engaging groove (202a-1) comprises a triangular portion (202a-1a) and engaging portions (202a-1b) provided on two symmetrical inclined surfaces of the triangular portion (202a-1a); The power connection sheet (203) comprises a straight section (203a), a primary bending section (203b) and a secondary bending section (203c) connected in sequence; a gate-shaped groove (203b-1) is cut out in the middle of the primary bending section (203b); a square sheet (203b-2) surrounded by the gate-shaped groove (203b-1) is connected to the secondary bending section (203c) and is symmetrical with the secondary bending section (203c) after being bent; and the square sheet (203b-2) and the secondary bending section (203c) are placed in the interlocking portion (202a-1b).

4. The circuit protection device of the power conditioner in the photovoltaic power generation system according to claim 3, characterized in that: A clamping piece (204) is provided on the side of the power connection sheet (203) facing away from the seat body (202a), and the clamping piece (204) comprises two structurally symmetrical clamping parts (204a) and an annular connecting part (204b) connected between the two clamping parts (204a); An insertion gap for the contact knife (201b) is provided between the two clamping parts (204a), and a clamping ring (204c) with a notch is provided between the two clamping parts (204a).

5. The circuit protection device of the power conditioner in the photovoltaic power generation system according to claim 4, characterized in that: The clamping portion (204a) is provided with a through hole (204a-1), the bottom end of the side wall of the clamping portion (204a) is provided with a mounting groove (204a-2), and a limiting groove (204a-3) is provided at the bottom of the mounting groove (204a-2); The clamping ring (204c) is an elastic metal ring, the clamping end of the clamping ring (204c) passes through the through hole (204a-1) on the corresponding clamping portion (204a) and provides a clamping force for the contact knife (201b), and the ring body of the clamping ring (204c) passes through the installation groove (204a-2) and is embedded in the limiting groove (204a-3).

6. The circuit protection device of the power conditioner in the photovoltaic power generation system according to claim 5, characterized in that: A conductive member (205) is disposed between the electrical connection sheet (203) and the clamping member (204), and the conductive member (205) comprises a pressing portion (205a) inserted into the fitting groove (202a-1), and a supporting portion (205b) disposed on a side of the pressing portion (205a) extending outside the fitting groove (202a-1); A long groove (205a-1) with one end open is provided at the connection between the supporting portion (205b) and the pressing portion (205a), the annular connecting portion (204b) of the power connection plate (203) is inserted into the long groove (205a-1), the supporting portion (205b) and the annular connecting portion (204b) are each formed with a circular hole (K) that can communicate with each other, and the clamping member (204) and the conducting member (205) are fixedly connected by bolts.

7. The circuit protection device of the power conditioner in the photovoltaic power generation system according to claim 6, characterized in that: Two symmetrically arranged elastic clips (205c) are provided on one side of the pressing portion (205a) away from the supporting portion (205b), and a portion of the elastic clips (205c) is inserted into the embedded portion (202a-1b).

8. The circuit protection device of the power conditioner in the photovoltaic power generation system according to claim 7, characterized in that: A receiving groove (202a-2) for receiving the fuse (201) is also provided on the side of the seat body (202a) facing away from the installation guide rail (102), and the receiving groove (202a-2) is located between the two engaging grooves (202a-1).

9. The circuit protection device of the power conditioner in the photovoltaic power generation system according to any one of claims 2 to 8, characterized in that: The seat body (202a) is also provided with a connection unit connected to another identical seat body (202a), and the connection unit comprises a plug-in slot (202a-3a) provided on one side of the seat body (202a), and a plug-in block (202a-3b) provided on a side of the seat body (202a) opposite to the plug-in slot (202a-3a) and having a contour consistent with that of the plug-in slot (202a-3a).

10. The circuit protection device of the power conditioner in the photovoltaic power generation system according to claim 2, characterized in that: A sliding groove (202a-4) that is slidably matched with the mounting rail (102) is provided on one side of the seat body (202a) adjacent to the mounting rail (102).

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