Knife switch assembly, photovoltaic equipment and photovoltaic power station
By designing a differentiated wiring structure in the knife switch assembly, the problem of connecting the live wire and neutral terminals in photovoltaic equipment is solved, the stability and reliability of the wiring are improved, and the stable operation of the photovoltaic power station is ensured.
Patent Information
- Application Number
- CN202421200639.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The cold pressing terminals of live wire and neutral wire in photovoltaic equipment are easily connected incorrectly, resulting in short circuit failures in knife switches and photovoltaic equipment, affecting the stable and reliable operation of the photovoltaic power station.
Design a knife gate assembly, whose wiring structure is differentiated with the shape and size of the cold press terminal, so that the first wiring structure can only be matched with the first cold press terminal, and the second wiring structure can only be matched with the second cold press terminal. Terminal matching installation to avoid errors.
Through the differentiated wiring structure, the wiring stability and reliability of the knife switch assembly are improved, the misconnection between live wires and neutral wires is avoided, and the stable operation of photovoltaic equipment is enhanced.
Smart Images
Figure CN222507378U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaic equipment, in particular to a knife switch component, photovoltaic equipment and a photovoltaic power station. Background Art
[0002] In the prior art, most photovoltaic devices such as rectifier boxes and grid-connected boxes in photovoltaic power stations are equipped with knife switches to control the on-off of the circuit to ensure the stable operation of the photovoltaic equipment.
[0003] However, the cold-pressure terminals connected to the live wire and the cold-pressure terminals connected to the neutral wire in photovoltaic equipment mostly adopt the same structural setting, and wiring slots of the same shape and size are usually set on the knife switch to install the cold-pressure terminals connected to the live wire and the cold-pressure terminals of the neutral wire respectively. Construction workers are prone to connect the cold-pressure terminals of the live wire and the neutral wire incorrectly on the knife switch during installation, causing the live wire loop to be conductive with the neutral wire, which can easily cause short-circuit failures in the knife switch and the photovoltaic equipment, affecting the stable and reliable operation of the photovoltaic power station. Utility Model Content
[0004] The main purpose of the utility model is to propose a knife switch assembly, photovoltaic equipment and photovoltaic power station, aiming to achieve differentiated design of live wire wiring and neutral wire wiring of the knife switch assembly, prevent the live wire and neutral wire of the knife switch from being connected incorrectly, improve the wiring stability and reliability of the knife switch assembly, and further improve the stable operation of the photovoltaic equipment.
[0005] To achieve the above-mentioned purpose, the knife switch assembly proposed in the utility model includes a knife switch body and a reclosing switch, the knife switch body has two wiring terminals, the wiring terminals are provided with a first wiring structure and a second wiring structure, the first wiring slot is provided with a first power connector, the second wiring slot is provided with a second power connector, the first wiring structure is used to install and connect the first cold-pressed terminal, and the second wiring structure is used to install and connect the second cold-pressed terminal; the reclosing switch is connected to the first power connector and the second power connector of one of the wiring terminals, and is detachably connected to the first power connector and the second power connector of the other wiring terminal. Wherein, the first wiring structure is configured to be unable to match and install with the second cold-pressed terminal, and / or the second wiring structure is configured to be unable to match and install with the first cold-pressed terminal.
[0006] In one embodiment, the first wiring structure includes a first wiring slot and a first fastener, the first fastener is arranged in the first wiring slot and is used to install and fix the first cold-pressed terminal; the second wiring structure includes a second wiring slot and a second fastener, the second fastener is arranged in the second wiring slot and is used to install and fix the second cold-pressed terminal.
[0007] In one embodiment, the slot width of the first wiring slot is inconsistent with the slot width of the second wiring slot, the slot width of the first wiring slot is configured to correspond to the size setting of the end plate of the first cold press terminal, and the slot width of the second wiring slot is configured to correspond to the size setting of the end plate of the second cold press terminal.
[0008] In one embodiment, the shape of the first wiring slot is inconsistent with the shape of the second wiring slot, the shape of the first wiring slot is configured to correspond to the shape of the end plate of the first cold press terminal, and the shape of the second wiring slot is configured to correspond to the shape of the end plate of the second cold press terminal.
[0009] In one embodiment, the bottom wall of the first wiring slot is provided with a first threaded hole, the first fastener is a fastening bolt, the first fastener is used to pass through the first mounting hole of the first cold press terminal, threadedly matched with the first threaded hole, and pressed and fixed the end plate of the first cold press terminal. The bottom wall of the second wiring slot is provided with a second threaded hole, the second fastener is a fastening bolt, the second fastener is used to pass through the second mounting hole of the second cold press terminal, threadedly matched with the second threaded hole, and pressed and fixed the end plate of the second cold press terminal.
[0010] In one embodiment, the bolt diameter of the first fastener is inconsistent with the bolt diameter of the second fastener, the bolt diameter of the first fastener is configured to correspond to the aperture setting of the first mounting hole of the first cold press terminal, and the bolt diameter of the second fastener is configured to correspond to the aperture setting of the second mounting hole of the second cold press terminal.
[0011] The first fastener is provided with a first clamping section, and the first clamping section is used to clamp the first mounting hole of the first cold-pressed terminal, and the second fastener is provided with a second clamping section, and the second clamping section is used to clamp the second mounting hole of the second cold-pressed terminal. The cross-sectional shape of the first clamping section is inconsistent with the cross-sectional shape of the second clamping section, and the cross-sectional shape of the first clamping section is configured to correspond to the shape of the first mounting hole of the first cold-pressed terminal, and the cross-sectional shape of the second clamping section is configured to correspond to the shape of the second mounting hole of the second cold-pressed terminal.
[0012] In one embodiment, the wiring terminal is provided with three first wiring structures and one second wiring structure, the three first wiring structures are respectively used to install and connect three first cold pressing terminals, and the three first wiring structures are configured to be unable to be matched and installed with the second cold pressing terminal.
[0013] In one embodiment, the knife switch assembly further includes a protective cover, which is connected to the knife switch body and covers the first wiring structure and the second wiring structure.
[0014] The utility model also provides a photovoltaic device, which comprises a device body and a knife switch assembly. The knife switch assembly is the knife switch assembly described above, and the knife switch assembly is installed on the device body.
[0015] The utility model also provides a photovoltaic power station, which includes a photovoltaic module and a photovoltaic device. The photovoltaic device is the photovoltaic device mentioned above, and the photovoltaic device is electrically connected to the photovoltaic module.
[0016] The technical solution of the utility model realizes the differentiated design of the first wiring structure and the second wiring structure by making the first wiring structure and the second wiring structure of the knife switch assembly correspond to the structural settings of the first cold-pressed terminal and the second cold-pressed terminal respectively, and the second cold-pressed terminal cannot be matched and installed on the first wiring structure due to the large structural difference in shape or size between the first wiring structure and the second cold-pressed terminal, or the first cold-pressed terminal cannot be matched and installed on the second wiring structure due to the large structural difference in shape or size between the second wiring structure and the first cold-pressed terminal, so that construction workers can more intuitively distinguish between the external cable and the live wire and the neutral wire inside the photovoltaic device when performing wiring operations on the knife switch assembly, effectively avoid installation misalignment of the first cold-pressed terminal and the second cold-pressed terminal on the knife switch body, better improve the wiring stability and reliability of the photovoltaic device and the external cable on the knife switch assembly, and improve the practicality and reliability of the knife switch assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art 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 the structures shown in these drawings without paying creative work.
[0018] Figure 1 A schematic structural diagram of an embodiment of a knife switch assembly provided by the utility model;
[0019] Figure 2 for Figure 1 A structural exploded view of an embodiment of a knife switch assembly;
[0020] Figure 3 for Figure 1 A front view of an embodiment of a knife switch assembly with the protective cover removed;
[0021] Figure 4 for Figure 1 A front view of another embodiment of the knife switch assembly with the protective cover removed;
[0022] Figure 5 for Figure 1 A schematic structural diagram of an embodiment of a knife switch assembly after removing part of the first fastener and the second fastener;
[0023] Figure 6 for Figure 1 A structural schematic diagram of another embodiment of the knife switch assembly after removing part of the first fastener and the second fastener.
[0024] Description of Figure Numbers:
[0025] 100, knife switch assembly; 10, knife switch body; 11, first wiring slot; 111, first power connection piece; 13, second wiring slot; 131, second power connection piece; 15, first fastener; 17, second fastener; 30, reclosing switch; 50, first cold-pressed terminal; 51, first mounting hole; 70, second cold-pressed terminal; 71, second mounting hole; 90, protective cover; 200, live wire; 400, neutral wire.
[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0030] In the prior art, photovoltaic equipment such as rectifier boxes and grid-connected boxes in photovoltaic power stations are mostly equipped with knife switches to control the on-off of the circuit to ensure the stable operation of the photovoltaic equipment. However, the cold-pressed terminals connected to the live wire and the cold-pressed terminals connected to the neutral wire in photovoltaic equipment mostly adopt the same structural setting, and wiring slots of the same shape and size are usually set on the knife switch to install the cold-pressed terminals connected to the live wire and the cold-pressed terminals of the neutral wire respectively. During installation, construction workers are prone to connect the cold-pressed terminals of the live wire and the cold-pressed terminals of the neutral wire incorrectly on the knife switch, resulting in the conduction of the live wire loop and the neutral wire, which is easy to cause short-circuit failures in the knife switch and the photovoltaic equipment, affecting the stable and reliable operation of the photovoltaic power station. In view of the above problems, the utility model proposes a knife switch assembly 100.
[0031] See also Figures 1 to 6 In one embodiment of the utility model, the knife switch assembly 100 includes a knife switch body 10 and a reclosing switch 30. The knife switch body 10 has two wiring terminals, and the wiring terminals are provided with a first wiring structure and a second wiring structure. The first wiring slot is provided with a first power connector 111, and the second wiring slot is provided with a second power connector 131. The first wiring structure is used to install and connect the first cold-pressed terminal 50, and the second wiring structure is used to install and connect the second cold-pressed terminal 70; the reclosing switch 30 is connected to the first power connector 111 and the second power connector 131 of one wiring terminal, and is detachably connected to the first power connector 111 and the second power connector 131 of the other wiring terminal. Among them, the first wiring structure is configured to be unable to match and install with the second cold-pressed terminal 70, and / or the second wiring structure is configured to be unable to match and install with the first cold-pressed terminal 50.
[0032] It is understandable that a photovoltaic power station can use photovoltaic equipment such as inverters and grid-connected boxes to connect to photovoltaic modules through wires, so that the electric energy converted by the photovoltaic modules can be stably output to the power grid after being processed by photovoltaic equipment such as inverters and grid-connected boxes, thereby ensuring the stable operation of the photovoltaic power station. In photovoltaic equipment, in order to achieve on-off control of the circuit inside the equipment, a knife switch assembly 100 can be set in photovoltaic equipment such as inverters and grid-connected boxes to connect the external cable and the cable of the internal components of the equipment, so that the conduction and power-off of the external cable and the internal components of the photovoltaic equipment can be achieved by controlling the reclosing switch 30 of the knife switch assembly 100, and then the control of the power output of the photovoltaic power station and the interference protection in the event of a fault can be achieved by controlling the on-off of the photovoltaic equipment and the external cable by the knife switch assembly 100, so that the photovoltaic power station can achieve a more stable and reliable power output. At this time, the first cold terminal 50 and the second cold terminal 70 can be connected to the wire end of the device inside the photovoltaic device and the end of the external cable respectively. The first cold terminal 50 can be connected to the live wire 200, and the second cold terminal 70 can be connected to the neutral wire 400. Then, the first cold terminal 50 and the second cold terminal 70 are installed and connected with the wiring terminals of the knife switch assembly 100, which can better improve the wiring convenience between the knife switch assembly 100 and the device cables and external cables.
[0033] In the present application, the two wiring terminals of the knife switch body 10 can be used to install and connect the external cable and the cable in the photovoltaic device, so that the external cable and the cable in the photovoltaic device can be switched on and off under the action of the reclosing switch 30. At this time, the two wiring terminals of the knife switch body 10 can be respectively provided with a first wiring structure and a second wiring structure, and the first wiring structure and the second wiring structure can be a limiting column structure or a slot structure, etc., by limiting and fixing the terminal at the end of the cable in the first wiring structure and the second wiring structure, and under the tightening action of a bolt or a pin, etc., a stable connection between the cable and the knife switch body 10 can be achieved. Since the knife switch body 10 can be made of insulating material, by arranging the first power connector 111 in the first wiring structure and the second power connector 131 in the second wiring structure, the reclosing switch 30 can be provided with a plurality of independent conductive knives, so that the plurality of conductive knives of the reclosing switch 30 are respectively connected to the first power connector 111 and the second power connector 131 of one wiring terminal, and the reclosing switch 30 is rotatably connected or slidably connected to the first power connector 111 and the second power connector 131 of the wiring terminal. The movement of the reclosing switch 30 on the knife switch body 10 can be utilized to realize the connection or separation of the plurality of conductive knives of the reclosing switch 30 with the first power connector 111 and the second power connector 131 of the other wiring terminal, respectively, and then the electrical connection and disconnection of the first power connector 111 on the two wiring terminals of the knife switch body 10 and the electrical connection and disconnection of the second power connector 131 on the two wiring terminals can be realized by controlling the movement of the reclosing switch 30.
[0034] By installing the first cold-pressed terminal 50 at the end of the live wire 200 inside the external cable and the photovoltaic device, and installing the second cold-pressed terminal 70 at the end of the neutral wire 400 inside the external cable and the photovoltaic device, the first cold-pressed terminal 50 can be installed and fixed to the first wiring structure through a fastening structure such as a bolt or a plug, so that the first cold-pressed terminal 50 is now in contact with the first power connector 111 of the first wiring structure for conduction; and the second cold-pressed terminal 70 is installed and fixed to the second wiring structure through a fastening structure such as a bolt or a plug, so that the second cold-pressed terminal 70 is now in contact with the second power connector 131 of the second wiring structure for conduction, thereby better realizing stable and reliable connection between the knife switch assembly 100 and the external cable and the internal cables of the photovoltaic device, and effectively improving the structural stability and reliability of the photovoltaic device.
[0035] Among them, in order to better distinguish the installation of the first cold-pressed terminal 50 and the second cold-pressed terminal 70, the first cold-pressed terminal 50 and the second cold-pressed terminal 70 can generally adopt different shapes or sizes and other structural designs. At this time, the knife switch assembly 100 can adopt differentiated designs for the first wiring structure and the second wiring structure, so that the groove body or fastening structure formed by the first wiring structure can be matched with the structure of the first cold-pressed terminal 50, and the groove body or fastening structure formed by the second wiring structure can be matched with the structure of the second cold-pressed terminal 70, and the structural difference between the first cold-pressed terminal 50 and the second cold-pressed terminal 70 can be large, and then during the installation process, the first cold-pressed terminal 50 can only be matched and installed on the first wiring structure, and the second cold-pressed terminal 70 can only be matched and installed on the second wiring structure. Therefore, the first cold-pressed terminal 50 can be limited by the shape or size difference with the second wiring structure, so that the first cold-pressed terminal 50 cannot be matched and installed on the second wiring structure, or the second cold-pressed terminal 70 can be limited by the shape or size difference with the first wiring structure, so that the second cold-pressed terminal 70 cannot be matched and installed on the first wiring structure, which is beneficial to better avoid the misalignment of the first cold-pressed terminal 50 and the second cold-pressed terminal 70 when installed on the knife switch body 10, and can better avoid the misconnection of the live wire circuit and the neutral wire circuit on the knife switch assembly 100, prevent the live wire 200 circuit of the external cable and the photovoltaic device from being connected to the neutral wire 400, better improve the power connection stability and reliability of the photovoltaic device and the external cable, prevent the knife switch assembly 100 and the photovoltaic device from short-circuit failure, and further improve the practicality and reliability of the knife switch assembly 100.
[0036] The technical solution of the utility model realizes the differentiated design of the first wiring structure and the second wiring structure by making the first wiring structure and the second wiring structure of the knife switch assembly 100 correspond to the structural settings of the first cold-pressed terminal 50 and the second cold-pressed terminal 70 respectively, and the second cold-pressed terminal 70 cannot be matched and installed on the first wiring structure due to the large structural difference in shape or size between the first wiring structure and the second cold-pressed terminal 70, or the first cold-pressed terminal 50 cannot be matched and installed on the second wiring structure due to the large structural difference in shape or size between the second wiring structure and the first cold-pressed terminal 50, so that when the construction workers perform wiring operations on the knife switch assembly 100, they can more intuitively distinguish between the external cable and the live wire 200 and the neutral wire 400 inside the photovoltaic device for operation, effectively avoiding the installation misalignment of the first cold-pressed terminal 50 and the second cold-pressed terminal 70 on the knife switch body 10, better improving the wiring stability and reliability of the photovoltaic device and the external cable on the knife switch assembly 100, and improving the practicality and reliability of the knife switch assembly 100.
[0037] Reference Figures 2 to 6 In the embodiment of the utility model, the first wiring structure includes a first wiring slot 11 and a first fastener 15, the first fastener 15 is arranged in the first wiring slot 11, and is used to install and fix the first cold-pressed terminal 50. The second wiring structure includes a second wiring slot 13 and a second fastener 17, the second fastener 17 is arranged in the second wiring slot 13, and is used to install and fix the second cold-pressed terminal 70.
[0038] In this embodiment, the first wiring slot 11 and the second wiring slot 13 can be arranged in parallel at the wiring end of the knife switch body 10, so that the first power connector 111 and the second power connector 131 are installed in the first wiring slot 11 and the second wiring slot 13 respectively, and the first fastener 15 and the second fastener 17 can be bolts or plugs that can be detachably arranged with the knife switch body 10. At this time, a threaded hole or a jack that cooperates with the first fastener 15 can be arranged on the bottom wall of the first wiring slot 11; or a through hole can be arranged on the bottom wall of the first wiring slot 11, and a nut or a sleeve that cooperates with the first fastener 15 can be arranged on the back of the knife switch body 10 facing away from the first wiring slot 11, so that the first cold terminal 50 can be accommodated in the first wiring slot 11, and the first fastener 15 is used to pass through the first cold terminal 50 in the first wiring slot 11 to connect to the knife switch body 10 to press and fix the first cold terminal 50 and the first power connector 111, so as to achieve a stable electrical connection between the first cold terminal 50 and the first power connector 111. Similarly, a threaded hole or jack that cooperates with the second fastener 17 can be set on the bottom wall of the second wiring slot 13; or a through hole can be set on the bottom wall of the second wiring slot 13, and a nut or sleeve that cooperates with the second fastener 17 can be set on the back side of the knife switch body 10 facing away from the second wiring slot 13, so that the second cold-pressed terminal 70 can be accommodated in the second wiring slot 13, and the second fastener 17 is used to pass through the second cold-pressed terminal 70 in the second wiring slot 13 and connect to the knife switch body 10 to tighten and fix the second cold-pressed terminal 70 and the second electrical connector 131, so as to achieve a stable electrical connection between the second cold-pressed terminal 70 and the second electrical connector 131. Therefore, under the limiting and fixing effect of the first wiring groove 11 and the first fastener 111 on the first cold-pressed terminal 50, and under the limiting and fixing effect of the second wiring groove 13 and the second fastener 131 on the second cold-pressed terminal 70, the installation and fixation of the knife switch assembly 100 to the external cables and the internal cables of the photovoltaic equipment can be effectively improved, and the wiring stability and reliability of the knife switch assembly 100 can be further improved.
[0039] Among them, the structural shape or size of the first wiring slot 11 and the structural shape or size of the second wiring slot 13 can be designed with a differentiated design, or the first fastener 15 and the second fastener 17 can be designed with different specifications, so that the second cold-pressed terminal 70 cannot be well installed in the first wiring slot 11 or the first fastener 111 cannot be well utilized to connect and fix the second cold-pressed terminal 70; or the first cold-pressed terminal 50 cannot be well installed in the second wiring slot 13 or the second fastener 131 cannot be well utilized to connect and fix the first cold-pressed terminal 50, which is conducive to better preventing the cables on the knife switch assembly 100 from being misconnected, and further improving the practicality and reliability of the knife switch assembly 100.
[0040] See also Figure 2 and Figure 3In an embodiment of the utility model, the slot width of the first wiring slot 11 is inconsistent with the slot width of the second wiring slot 13. The slot width of the first wiring slot 11 is configured to correspond to the size setting of the end plate of the first cold pressing terminal 50, and the slot width of the second wiring slot 13 is configured to correspond to the size setting of the end plate of the second cold pressing terminal 70.
[0041] In this embodiment, since the diameter of the live wire 200 and the diameter of the neutral wire 400 on the photovoltaic device and the external cable are quite different, the first cold-pressed terminal 50 connected to the live wire 200 and the second cold-pressed terminal 70 connected to the neutral wire 400 can adopt two terminal specifications with quite different overall structural dimensions, which is conducive to better distinguishing the first cold-pressed terminal 50 and the second cold-pressed terminal 70 in terms of appearance dimensions. At this time, taking the example that the overall structural size of the first cold-pressed terminal 50 is larger than the overall structural size of the second cold-pressed terminal 70, by making the slot width of the first wiring slot 11 correspond to the size setting of the first cold-pressed terminal 50, and making the slot width of the second wiring slot 13 correspond to the size setting of the second cold-pressed terminal 70, the slot width of the first wiring slot 11 can be made greater than or equal to the size setting of the first cold-pressed terminal 50; the slot width of the second wiring slot 13 is made greater than or equal to the size of the second cold-pressed terminal 70, and smaller than the size setting of the first cold-pressed terminal 50. In this way, during the installation process, the first cold-pressed terminal 50 cannot be installed in the second wiring slot 13 because the size of the first cold-pressed terminal 50 is larger than the slot width of the second wiring slot 13, effectively avoiding the misconnection of the first cold-pressed terminal 50 and the second cold-pressed terminal 70 on the knife switch body 10, further improving the connection stability and reliability between the knife switch assembly 100 and the external cable and the cable in the photovoltaic equipment, and ensuring the stable operation of the knife switch assembly 100.
[0042] Similarly, in an embodiment where the overall structural dimensions of the first cold-pressed terminal 50 are smaller than the overall structural dimensions of the second cold-pressed terminal 70, the slot width of the first wiring slot 11 can also be set smaller than the slot width of the second wiring slot 13, and smaller than the size setting of the second cold-pressed terminal 70, so that the second cold-pressed terminal 70 cannot be installed in the first wiring slot 11 due to its size being larger than the slot width of the first wiring slot 11, thereby avoiding misconnection of the first cold-pressed terminal 50 and the second cold-pressed terminal 70 on the knife switch body 10, further improving the connection stability and reliability between the knife switch assembly 100 and the external cable and the cable in the photovoltaic device, and ensuring the stable operation of the knife switch assembly 100.
[0043] See also Figure 4 In an embodiment of the utility model, the shape of the first wiring groove 11 is inconsistent with the shape of the second wiring groove 13. The shape of the first wiring groove 11 is configured to correspond to the shape of the end plate of the first cold pressing terminal 50, and the shape of the second wiring groove 13 is configured to correspond to the shape of the end plate of the second cold pressing terminal 70.
[0044] In this embodiment, the first cold terminal 50 and the second cold terminal 70 may respectively include a fixing tube for fixing the cable and an end plate installed in the first installation groove. At this time, the end plate of the first cold terminal 50 may be arranged with a terminal structure of a circular, square or other irregular shape, and the end plate of the second cold terminal 70 may be arranged with a terminal structure inconsistent with the shape of the end plate of the first cold terminal 50. In this way, the cross-sectional shape of the first wiring groove 11 may correspond to the shape of the end plate of the first cold terminal 50, and the cross-sectional shape of the second wiring groove 13 may correspond to the shape of the end plate of the second cold terminal 70, so that during the installation process, the end plate of the first cold terminal 50 may not be well installed in the second installation groove due to different shapes, and the end plate of the second cold terminal 70 may not be well installed in the first installation groove due to different shapes, which is conducive to better preventing the first cold terminal 50 and the second cold terminal 70 from being installed misaligned, avoiding failure of the knife switch assembly 100, ensuring stable and reliable wiring of the knife switch assembly 100, and further improving the practicality and reliability of the knife switch assembly 100.
[0045] See also Figure 2 , Figure 5 and Figure 6 In the embodiment of the utility model, the bottom wall of the first wiring slot 11 is provided with a first threaded hole, and the first fastener 15 is a fastening bolt. The first fastener 15 is used to pass through the first mounting hole 51 of the first cold-pressed terminal 50 and threadedly cooperate with the first threaded hole, and press and fix the end plate of the first cold-pressed terminal 50. The bottom wall of the second wiring slot 13 is provided with a second threaded hole, and the second fastener 17 is a fastening bolt. The second fastener 17 is used to pass through the second mounting hole 71 of the second cold-pressed terminal 70 and threadedly cooperate with the second threaded hole, and press and fix the end plate of the second cold-pressed terminal 70.
[0046] In the present embodiment, by making the first fastener 15 adopt the structural form of a fastening bolt, and forming a matching first threaded hole on the bottom wall of the first wiring slot 11, the first threaded hole can be a hole structure recessed on the bottom wall of the first wiring slot 11, or can be formed by a nut embedded in the knife switch body 10 exposed on the bottom wall of the first wiring slot 11, a first mounting hole 51 can be opened on the first cold terminal 50, and a through hole corresponding to the first mounting hole 51 can be opened on the first power connector 111, and then the first fastener 15 can be used to pass through the first mounting hole 51 and the through hole on the first power connector 111 and be threadedly connected with the first threaded hole, which is conducive to using the nut of the first fastener 15 to press the first cold terminal 50 and the first power connector 111, ensuring the stable installation of the first cold terminal 50 on the knife switch assembly 100, and further improving the structural stability and reliability of the knife switch assembly 100. In addition, the first fastener 15 in the form of a fastening bolt is used to connect and fix the first cold terminal 50 and the first power connector 111, so that the knife switch assembly 100 can be assembled more conveniently, and the assembly convenience of the first cold terminal 50 on the knife switch body 10 is further improved.
[0047] Similarly, by making the second fastener 17 adopt the structure of a fastening bolt and forming a matching second threaded hole on the bottom wall of the second wiring slot 13, the second threaded hole can be a hole structure recessed on the bottom wall of the second wiring slot 13, or can be formed by a nut embedded in the knife switch body 10 exposed on the bottom wall of the second wiring slot 13, a second mounting hole 71 can be opened on the second cold-pressed terminal 70, and a through hole corresponding to the second mounting hole 71 can be opened on the second power connector 131, and then the second fastener 17 can be used to pass through the second mounting hole 71 and the through hole on the second power connector 131 to be threadedly connected with the second threaded hole, which is conducive to using the nut of the second fastener 17 to tighten the second cold-pressed terminal 70 and the second power connector 131, thereby ensuring the stable installation of the second cold-pressed terminal 70 on the knife switch assembly 100, and further improving the structural stability and reliability of the knife switch assembly 100. In addition, the second fastener 17 in the form of a fastening bolt is used to connect and fix the second cold terminal 70 and the second power connector 131, so that the knife switch assembly 100 can be assembled more conveniently, and the assembly convenience of the first cold terminal 50 on the knife switch body 10 can be further improved.
[0048] See also Figure 5 In an embodiment of the utility model, the bolt diameter of the first fastener 15 is inconsistent with the bolt diameter of the second fastener 17. The bolt diameter of the first fastener 15 is configured to correspond to the aperture setting of the first mounting hole 51 of the first cold press terminal 50, and the bolt diameter of the second fastener 17 is configured to correspond to the aperture setting of the second mounting hole 71 of the second cold press terminal 70.
[0049] In this embodiment, the first cold-pressed terminal 50 can be provided with a first mounting hole 51 with a larger aperture, and the aperture of the second mounting hole 71 of the second cold-pressed terminal 70 can be smaller than the aperture of the first mounting hole 51. At this time, the bolt diameter of the first fastener 15 can be set corresponding to the aperture of the first mounting hole 51, and the bolt diameter of the second fastener 17 can be set corresponding to the aperture of the second mounting hole 71, and the bolt diameter of the first fastener 15 can be larger than the aperture of the second mounting hole 71 of the second cold-pressed terminal 70. In this way, the overall size specification of the bolt of the second fastener 17 can be smaller than that of the first fastener 15 is set, and during the installation process, the first fastener 15 cannot pass through the second mounting hole 71 of the second cold-pressed terminal 70 to be installed in the second mounting groove, and the second fastener 17 cannot be well matched and connected with the first threaded hole in the first mounting groove, which is conducive to better realizing the corresponding installation of the first cold-pressed terminal 50 and the second cold-pressed terminal 70 on the knife switch body 10, effectively preventing the first cold-pressed terminal 50 and the second cold-pressed terminal 70 from being connected incorrectly, ensuring the stable and reliable wiring of the knife switch assembly 100, and further improving the practicality and reliability of the knife switch assembly 100.
[0050] In addition, in some embodiments, the first mounting hole 51 on the first cold-pressed terminal 50 can be set smaller than the second mounting hole 71 of the second cold-pressed terminal 70. At this time, the first fastener 15 and the second fastener 17 can adopt a design similar to the above-mentioned scheme, so that the bolt diameter of the first fastener 15 is smaller than the bolt diameter of the second fastener 17, and the bolt diameter of the second fastener 17 is larger than the first mounting hole 51 of the first cold-pressed terminal 50, so that the second fastener 17 cannot pass through the first mounting hole 51 to install the first cold-pressed terminal 50 in the second wiring groove 13, thereby preventing the first cold-pressed terminal 50 and the second cold-pressed terminal 70 from being misconnected on the knife switch assembly 100, thereby achieving reliable wiring of the live wire 200 and the neutral wire 400 on the knife switch assembly 100, and further improving the practicality and reliability of the knife switch assembly 100.
[0051] See also Figure 6 In the embodiment of the utility model, the first fastener 15 is provided with a first clamping section, and the first clamping section is used to clamp the first mounting hole 51 of the first cold-pressed terminal 50, and the second fastener 17 is provided with a second clamping section, and the second clamping section is used to clamp the second mounting hole 71 of the second cold-pressed terminal 70. The cross-sectional shape of the first clamping section is inconsistent with the cross-sectional shape of the second clamping section. The cross-sectional shape of the first clamping section is configured to correspond to the shape of the first mounting hole 51 of the first cold-pressed terminal 50, and the cross-sectional shape of the second clamping section is configured to correspond to the shape of the second mounting hole 71 of the second cold-pressed terminal 70.
[0052] In the present embodiment, the first fastener 15 may include a nut, a first clamping section and a fastening section, wherein the nut is used to compress the first cold-pressed terminal 50 and the first power connector, the first clamping section connects the nut and the fastening section, and is correspondingly clamped with the inner wall of the first mounting hole 51 of the first cold-pressed terminal 50, and the fastening section can be threadedly connected with the first threaded hole, so that the first fastener 15 connects and fixes the first cold-pressed terminal 50 to the knife switch body 10. Similarly, the second fastener 17 may include a nut, a second clamping section and a fastening section, wherein the nut is used to compress the second cold-pressed terminal 70 and the second power connector, the second clamping section connects the nut and the fastening section, and is correspondingly clamped with the inner wall of the second mounting hole 71 of the second cold-pressed terminal 70, and the fastening section can be threadedly connected with the second threaded hole, so that the second fastener 17 connects and fixes the second cold-pressed terminal 70 to the knife switch body 10. Therefore, the first fastener 15 can set the cross-sectional shape of the first clamping section to correspond to the shape of the first mounting hole 51, which is beneficial to preventing the first cold-pressed terminal 50 from rotating on the knife switch body 10 under the connecting and fixing action of the first fastener 15; and the second fastener 17 can set the cross-sectional shape of the second clamping section to correspond to the shape of the second mounting hole 71, which is beneficial to preventing the second cold-pressed terminal 70 from rotating on the knife switch body 10 under the connecting and fixing action of the second fastener 17, so that the knife switch assembly 100 can achieve a more stable and reliable structural setting after installation and wiring, further improving the practicality and reliability of the knife switch assembly 100.
[0053] Among them, the first mounting hole 51 of the first cold-pressed terminal 50 can be set to a circular, square or other irregular shape, and the shape of the second mounting hole 71 of the second cold-pressed terminal 70 is set to be inconsistent with the shape of the first mounting hole 51 of the first cold-pressed terminal 50. At this time, the cross-sectional shape of the first clamping section and the cross-sectional shape of the second clamping section can be respectively corresponding to the shape of the first mounting hole 51 and the shape of the second mounting hole 71, so that the cross-sectional shape of the first clamping section is inconsistent with the cross-sectional shape of the second clamping section. In this way, during the installation process, the first fastener 15 can not be well penetrated into the second mounting hole 71 of the second cold-pressed terminal 70 due to the different cross-sectional shape of the first clamping section and the shape of the second mounting hole 71, and the second fastener 17 can not be well penetrated into the first mounting hole 51 of the first cold-pressed terminal 50 due to the different cross-sectional shape of the second clamping section and the shape of the first mounting hole 51, which is conducive to better preventing the first cold-pressed terminal 50 and the second cold-pressed terminal 70 from being installed misaligned, avoiding failure of the knife switch assembly 100, ensuring stable and reliable wiring of the knife switch assembly 100, and further improving the practicality and reliability of the knife switch assembly 100.
[0054] See also Figures 2 to 4In an embodiment of the utility model, the wiring terminal is provided with three first wiring structures and one second wiring structure, and the three first wiring structures are respectively used to install and connect three first cold pressing terminals 51, and the three first wiring structures are configured to be unable to match and install with the second cold pressing terminal 70.
[0055] In this embodiment, the photovoltaic power station can be connected to electricity and output electric energy in the form of three-phase alternating current. At this time, three live wires 200 and one neutral wire 400 can be correspondingly arranged on the photovoltaic device and the knife switch assembly 100 to realize three-phase power transmission. Therefore, three first wiring structures and one second wiring structure can be respectively arranged on the two wiring terminals of the knife switch body 10, so that the three live wires 200 and one neutral wire 400 of the external cable can be respectively installed at one wiring terminal of the knife switch body 10, and the three live wires 200 and one neutral wire 400 of the internal components of the photovoltaic device can be respectively installed at the other wiring terminal of the knife switch body 10, so as to ensure the stable wiring of the knife switch assembly 100 in the photovoltaic power station. Among them, by making the three first cold-pressed terminals connecting the three live wires 200 inconsistent with the structural setting of the second cold-pressed terminal 70 connecting the neutral wire 400, and making the three first wiring structures of each wiring terminal of the knife switch body 10 unable to cooperate with the connection and installation of the second cold-pressed terminal 70, it is possible to better avoid the second cold-pressed terminal 70 connecting the neutral wire of the external cable or photovoltaic equipment to be connected to the first wiring structure, effectively prevent the wrong connection of the knife switch assembly 100, ensure the stable conduction of the knife switch assembly 100 to the external cable and photovoltaic equipment, and further improve the structural stability and reliability of the knife switch assembly 100.
[0056] In addition, the shapes or sizes of the three first cold-pressed terminals 50 connected to the three live wires of the external cable or photovoltaic device can be made to be mismatched with the second wiring structure, which can better prevent the first cold-pressed terminal 50 connected to any live wire 200 on the external cable or photovoltaic device from being connected to the second wiring groove 13, effectively prevent the wrong connection of the knife switch assembly 100, ensure the stable conduction of the knife switch assembly 100 to the external cable and the photovoltaic device, and further improve the structural stability and reliability of the knife switch assembly 100.
[0057] See also Figure 1 and Figure 2 In an embodiment of the present utility model, the knife switch assembly 100 further includes a protective cover 90, which is connected to the knife switch body 10 and covers the first wiring structure and the second wiring structure.
[0058] In this embodiment, by connecting and setting a protective cover 90 on the knife switch body 10, after the external cable and the cable of the internal device of the photovoltaic device are stably installed on the knife switch assembly 100, the protective cover 90 can be used to cover the first wiring structure and the second wiring structure of the two power connection ends of the knife switch body 10. This is beneficial to better prevent foreign objects in the external environment from entering the first wiring structure and the second wiring structure to affect the stable power connection of the first cold terminal 50 and the second cold terminal 70, thereby realizing the protection function of the knife switch assembly 100, and further can better improve the power connection stability and reliability of the knife switch assembly 100 with the external cable and the photovoltaic device.
[0059] The utility model also proposes a photovoltaic device, which includes a device body and a knife switch assembly 100. The specific structure of the knife switch assembly 100 refers to the above embodiment. Since the photovoltaic device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0060] The utility model also proposes a photovoltaic power station, which includes photovoltaic components and photovoltaic equipment. The specific structure of the photovoltaic equipment refers to the above-mentioned embodiments. Since the photovoltaic power station adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.
[0061] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A knife switch assembly, characterized in that: include: The knife switch body has two wiring terminals, the wiring terminals are provided with a first wiring structure and a second wiring structure, the first wiring structure is provided with a first power connection piece, the second wiring structure is provided with a second power connection piece, the first wiring structure is used to install and connect a first cold-pressed terminal, and the second wiring structure is used to install and connect a second cold-pressed terminal; A reclosing switch, the reclosing switch is connected to the first and second power terminals of one of the wiring terminals, and is detachably connected to the first and second power terminals of the other wiring terminal; The first wiring structure is configured to be unable to be matched and installed with the second cold pressing terminal, and / or the second wiring structure is configured to be unable to be matched and installed with the first cold pressing terminal.
2. The knife switch assembly according to claim 1, characterized in that: The first wiring structure includes a first wiring slot and a first fastener, wherein the first fastener is disposed in the first wiring slot and is used to install and fix the first cold-pressed terminal; The second wiring structure includes a second wiring slot and a second fastener, wherein the second fastener is disposed in the second wiring slot and is used to install and fix the second cold-pressed terminal.
3. The knife switch assembly according to claim 2, characterized in that: The slot width of the first wiring slot is inconsistent with the slot width of the second wiring slot. The slot width of the first wiring slot is configured to correspond to the size setting of the end plate of the first cold press terminal, and the slot width of the second wiring slot is configured to correspond to the size setting of the end plate of the second cold press terminal.
4. The knife switch assembly according to claim 2, characterized in that: The shape of the first wiring slot is inconsistent with the shape of the second wiring slot. The shape of the first wiring slot is configured to correspond to the shape of the end plate of the first cold press terminal, and the shape of the second wiring slot is configured to correspond to the shape of the end plate of the second cold press terminal.
5. The knife switch assembly according to claim 2, characterized in that: A first threaded hole is provided on the bottom wall of the first wiring slot, and the first fastener is a fastening bolt, which is used to pass through the first mounting hole of the first cold-pressed terminal and be threadedly connected with the first threaded hole, and to press and fix the end plate of the first cold-pressed terminal; A second threaded hole is provided on the bottom wall of the second wiring slot, and the second fastener is a fastening bolt. The second fastener is used to pass through the second mounting hole of the second cold press terminal and be threadedly connected to the second threaded hole, and to press and fix the end plate of the second cold press terminal.
6. The knife switch assembly according to claim 5, characterized in that: The bolt diameter of the first fastener is inconsistent with the bolt diameter of the second fastener. The bolt diameter of the first fastener is configured to correspond to the aperture setting of the first mounting hole of the first cold press terminal, and the bolt diameter of the second fastener is configured to correspond to the aperture setting of the second mounting hole of the second cold press terminal.
7. The knife switch assembly according to claim 5, characterized in that: The first fastener is provided with a first clamping section, and the first clamping section is used to be clamped in the first mounting hole of the first cold pressing terminal; the second fastener is provided with a second clamping section, and the second clamping section is used to be clamped in the second mounting hole of the second cold pressing terminal; The cross-sectional shape of the first clamping section is inconsistent with the cross-sectional shape of the second clamping section. The cross-sectional shape of the first clamping section is configured to correspond to the shape setting of the first mounting hole of the first cold press terminal, and the cross-sectional shape of the second clamping section is configured to correspond to the shape setting of the second mounting hole of the second cold press terminal.
8. The knife switch assembly according to any one of claims 1 to 7, characterized in that: The wiring terminal is provided with three first wiring structures and one second wiring structure, the three first wiring structures are respectively used to install and connect three first cold pressing terminals, and the three first wiring structures are configured to be unable to be matched and installed with the second cold pressing terminal.
9. The knife switch assembly according to any one of claims 1 to 8, characterized in that: The knife switch assembly also includes a protective cover, which is connected to the knife switch body and covers the first wiring structure and the second wiring structure.
10. A photovoltaic device, characterized in that: The photovoltaic device comprises a device body and a knife switch assembly, wherein the knife switch assembly is the knife switch assembly according to any one of claims 1 to 9, and the knife switch assembly is mounted on the device body.
11. A photovoltaic power station, characterized in that: The photovoltaic power station comprises a photovoltaic module and a photovoltaic device, wherein the photovoltaic device is the photovoltaic device according to claim 10, and the photovoltaic device is electrically connected to the photovoltaic module.