Grid connection box

Abstract

A guide rail is fixedly mounted on a mounting plate in the grid-connected box, a base is clamped on the guide rail 1, a conductive wire inlet bar is arranged in the base, a switch module is clamped on the base, and a plug module is arranged in the switch module at a position corresponding to the conductive wire inlet bar. The electrical connection of each module in the switch module is realized through the plugging connection of the plugging module and the corresponding conductive incoming line bar. The conductive incoming line bar is fixed in the base, and after the base is pre-installed on the fixed guide rail in the grid-connected box, the switch module is directly connected with the base through the buckle, so that the operation is simple, the product can be directly taken out and replaced when the module goes wrong, and meanwhile, the cleanliness in the grid-connected box is also enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of power distribution, and specifically relates to a grid connection box. Background Art

[0002] A photovoltaic grid connection box is a device installed on a roof or the ground to convert solar energy into electricity. It is a new type of power generation system. The photovoltaic grid-connected power generation system is connected to the conventional power grid to jointly undertake the power supply task. When there is sunlight, the inverter converts the direct current generated by the photovoltaic system into sinusoidal alternating current. When there is no sun, all the electricity used by the load is supplied by the power grid. Moreover, in areas with high air humidity, condensation is likely to occur inside the existing photovoltaic grid connection box, which is likely to damage the equipment inside the box.

[0003] The general connection method between each module in the existing grid connection box is to fix the module on the guide rail and then connect each module with wires. However, this traditional connection method is complex to install; the wiring inside the box is relatively messy and the neatness is insufficient; it is relatively complex to replace when the product fails. Summary of the Utility Model

[0004] The purpose of the utility model is to address the defects of the existing grid connection box as described above, and provide a grid connection box. The switch module is installed on the base inside the grid connection box by using a plug-and-play structure, which simplifies the connection difficulty, reduces the connecting wires, and reduces the difficulty of replacement and maintenance.

[0005] Technical Solution

[0006] In order to achieve the above technical purpose, the utility model provides a grid connection box, which is characterized in that: the guide rail is fixedly installed on the mounting plate inside the grid connection box, the base is clamped on the guide rail, a conductive incoming line row is arranged inside the base, the switch module is clamped on the base, a plug-in module is arranged at the corresponding position of the switch module and the conductive incoming line row, and the electrical connection of each module inside the switch module is realized through the plug-and-play connection between the plug-in module inside the switch module and the corresponding conductive incoming line row.

[0007] In one of the embodiments, the switch module includes a circuit breaker module, a surge module and a reclosing module. A plug-in module one is arranged on the circuit breaker module, a plug-in module two is arranged on the surge module, and the circuit breaker module and the surge module are connected in parallel through the plug-and-play connection between the plug-in module one and the plug-in module two and the corresponding conductive incoming line row group one inside the base. A plug-in module three is arranged on the reclosing module, and the reclosing module and the circuit breaker module are connected in series through the plug-and-play connection between the plug-in module three and the plug-in module one and the corresponding conductive incoming line row group two inside the base.

[0008] In one embodiment, an installation card slot is provided on the base, and the conductive incoming line row b is clamped in the installation card slot to be limited.

[0009] In one embodiment, the conductive incoming line row is a conductive copper row.

[0010] In one embodiment, an insulating partition is provided between the conductive incoming line rows of each phase of the switch module.

[0011] In one embodiment, the circuit breaker module includes a screw incoming line end and a plug-in outgoing line end. The screw incoming line end is connected to an external circuit, and the plug-in outgoing line end is plugged into the conductive incoming line row.

[0012] In one embodiment, the surge module includes a plug-in incoming line end one and a screw outgoing line end one. The plug-in incoming line end one is plugged into the conductive incoming line row, and the screw outgoing line end one is grounded.

[0013] In one embodiment, the reclosing module includes a plug-in incoming line end two and a screw outgoing line end two. The plug-in incoming line end two is plugged into the conductive incoming line row, and the screw outgoing line end two is externally connected to an ammeter.

[0014] In one embodiment, the circuit breaker module includes a screw incoming line end and a plug-in outgoing line end, the surge module includes a plug-in incoming line end one and a screw outgoing line end one, and the reclosing module includes a plug-in incoming line end two and a screw outgoing line end two. The external circuit accesses the product from the screw incoming line end, the plug-in outgoing line end is connected to the plug-in incoming line end one, and the screw outgoing line end one is grounded to realize the parallel connection of the circuit breaker module and the surge module; the plug-in outgoing line end is also connected to the plug-in incoming line end two, and the screw outgoing line end two is connected to the external circuit to realize the series connection of the reclosing module and the circuit breaker module.

[0015] In one embodiment, there is a boss groove above the cover of the base to limit and install the switch module.

[0016] Advantageous Effects

[0017] The utility model provides a grid-connected box. The guide rail is fixedly installed on the mounting plate in the grid-connected box, the base is clamped on the guide rail, the base is internally provided with a conductive incoming line row, the switch module is clamped on the base, and a plug-in module is arranged at the corresponding position of the switch module and the conductive incoming line row. The electrical connection of each module in the switch module is realized through the plugging and unplugging connection between the plug-in module and the corresponding conductive incoming line row. The conductive incoming line row is fixed inside the base. After the base is pre-installed on the fixed guide rail in the grid-connected box, the switch module is directly connected to the base through a buckle. The operation is simple. When a module has a problem, the product can be directly taken out and replaced, which enhances the cleanliness inside the grid-connected box. Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Attached Figure 1 is a schematic structural diagram of the grid connection box in the embodiment of the present utility model;

[0020] Attached Figure 2a is a schematic installation diagram of the switch module in the embodiment of the present utility model;

[0021] Attached Figure 2b is a schematic diagram of the current flow direction in the embodiment of the present utility model;

[0022] Attached Figure 3 is a schematic diagram of the plug-in connection in the embodiment of the present utility model;

[0023] Attached Figure 4 is a schematic structural diagram of the installation of the conductive incoming line row in the embodiment of the present utility model Figure 1 ;

[0024] Attached Figure 5 is the second schematic structural diagram of the installation of the conductive incoming line row in the embodiment of the present utility model;

[0025] Attached Figure 6 is a schematic structural diagram of the insulating partition in the embodiment of the present utility model;

[0026] Attached Figure 7 is a schematic structural diagram of the conductive incoming line row in the embodiment of the present utility model;

[0027] Attached Figure 8 is a schematic structural diagram of the circuit breaker module in the embodiment of the present utility model;

[0028] Attached Figure 9 is a schematic structural diagram of the surge module in the embodiment of the present utility model;

[0029] Attached Figure 10 is a schematic structural diagram of the reclosing module in the embodiment of the present utility model; Specific embodiments

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are only for the purpose of illustration and do not represent the only implementation.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0035] Embodiment

[0036] The general connection method between each module in the existing grid-connected box is to fix the modules on the guide rail and then connect each module with wires. However, this traditional connection method is complex to install; the wiring inside the box is relatively messy and the tidiness is insufficient; it is relatively complex to replace when a product fails. To solve this problem, this embodiment provides a grid-connected box, as shown in the attached Figure 1 , Figures 2a and 3. The guide rail 1 is fixedly installed on the mounting plate 2 inside the grid-connected box a. In this embodiment, the guide rail 1 is fixedly installed on the mounting plate 2 inside the grid-connected box a by screws. The base 3 is snap-fitted on the guide rail 1. A conductive incoming line row b is built in the base 3. The switch module c is snap-fitted on the base 3. A plug-in module c0 is arranged at the corresponding position of the switch module c and the conductive incoming line row b. The electrical connection of each module in the switch module c is realized by the plugging and unplugging connection between the plug-in module c0 in the switch module c and the corresponding conductive incoming line row b.

[0037] Further, as shown in the attached Figure 4 and 5 , the conductive incoming line row b is a conductive copper row. In this embodiment, as shown in the attached Figure 5 and 7 , the conductive incoming line row b includes a conductive incoming line row group one b01 and a conductive incoming line row group two b02. The number and shape of the conductive incoming lines in the conductive incoming line row group one b01 and the conductive incoming line row group two b02 are determined according to the arrangement and pole number of the switch modules in actual application. In this embodiment, each of the conductive incoming line row group one b01 and the conductive incoming line row group two b02 includes 4 conductive incoming lines. An installation slot 301 is arranged on the base 3. The conductive incoming line row b is snap-fitted in the installation slot 301 and is limited. In addition, to ensure reliable and stable installation of the switch module c, as shown in the attached Figure 3 , there is a boss groove 302a above the cover 302 of the base 3 to limit and install the switch module c.

[0038] As shown in the attached Figure 1 and 2a , the specific connection method is as follows: The switch module c includes a circuit breaker module c1, a surge module c2 and a reclosing module c3. As shown in the attached Figure 6 , an insulating partition 4 is arranged between the conductive incoming line rows b of each phase of the switch module c. The circuit breaker module c1 includes a screw incoming line end c101 and a plug-in outgoing line end c102. The screw incoming line end c101 is connected to the external circuit, and the plug-in outgoing line end c102 is plugged into the conductive incoming line row b. The surge module c2 includes a plug-in incoming line end one c201 and a screw outgoing line end one c202. The plug-in incoming line end one c201 is plugged into the conductive incoming line row b, and the screw outgoing line end one c202 is grounded. The reclosing module c3 includes a plug-in incoming line end two c301 and a screw outgoing line end two c302. The plug-in incoming line end two c301 is plugged into the conductive incoming line row b, and the screw outgoing line end two c302 is externally connected to an electric meter.

[0039] Further, as shown in the appended Figure 8 figures, a plug-in module one c0101 is provided on the circuit breaker module c1. As shown in the appended Figure 9 figures, a plug-in module two c0102 is provided on the surge module c2. As shown in Figure 2 of the appended drawings, the circuit breaker module c1 and the surge module c2 are connected in parallel through the plug-in connection between the plug-in module one c0101 and the plug-in module two c0102 and the corresponding conductive incoming busbar group one b01 in the base 3. As shown in the appended Figure 10 figures, a plug-in module three c0103 is provided on the reclosing module c3. As shown in the appended Figure 2a figures, the reclosing module c3 and the circuit breaker module c1 are connected in series through the plug-in connection between the plug-in module three c0103 and the plug-in module one c0101 and the corresponding conductive incoming busbar group two b02 in the base 3. After the entire circuit is connected, the current flow direction of the switch module is as shown by the arrow in the appended Figure 2b figures. The specific current flow direction is as follows: after the external circuit is connected to the product from the screw incoming terminal c101, a part of the current flows from the plug-in outgoing terminal c102 into the plug-in incoming terminal one c201, and finally is grounded through the screw outgoing terminal one c202, realizing the parallel connection of the circuit breaker module c1 and the surge module c2; another part of the current flows from the plug-in outgoing terminal c102 into the plug-in incoming terminal two c301, and finally flows into the external circuit through the screw outgoing terminal two (c302), realizing the series connection of the reclosing module c3 and the circuit breaker module c1.

[0040] In summary, the present invention provides a grid connection box. The guide rail 1 is fixedly installed on the mounting plate 2 in the grid connection box a, the base 3 is clamped on the guide rail 1, the base 3 is internally provided with conductive incoming busbars b, the switch module c is clamped on the base 3, and a plug-in module c0 is provided at the corresponding position of the switch module c and the conductive incoming busbars b. The electrical connection of each module in the switch module c is realized through the plugging and unplugging connection between the plug-in module c0 and the corresponding conductive incoming busbars b. After the conductive incoming busbars are fixed in the base and the base is pre-installed on the fixed guide rail in the grid connection box, the switch module is directly connected to the base through a buckle, the operation is simple, and when a module has a problem, the product can be directly taken out and replaced, enhancing the cleanliness inside the grid connection box.

[0041] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0042] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A grid-connected box, characterized in that: The guide rail (1) is fixedly mounted on a mounting plate (2) in a grid-connected box (a); a base (3) is mounted on the guide rail (1); a conductive incoming line bar (b) is built into the base (3); a switch module (c) is mounted on the base (3); a plug-in module (c0) is arranged in the switch module (c) at a position corresponding to the conductive incoming line bar (b); and electrical connection of each module in the switch module (c) is achieved by plugging and unplugging the plug-in module (c0) and the corresponding conductive incoming line bar (b).

2. A grid-connected box according to claim 1, characterized in that: The switch module (c) comprises a circuit breaker module (c1), a surge module (c2) and a reclosing module (c3); the circuit breaker module (c1) is provided with a plug-in module 1 (c0101), the surge module (c2) is provided with a plug-in module 2 (c0102), and the circuit breaker module (c1) and the surge module (c2) are connected to a corresponding conductive incoming line group 1 (b0102) in the base (3) via the plug-in module 1 (c0101) and the plug-in module 2 (c0102). 1) is connected in parallel with the circuit breaker module (c1) and the surge module (c2); the reclosing module (c3) is provided with a plug-in module three (c0103); the reclosing module (c3) and the circuit breaker module (c1) are connected in series with the corresponding conductive incoming line group two (b02) in the base (3) through the plug-in module three (c0103) and the plug-in module one (c0101).

3. A grid-connected box according to claim 2, characterized in that: The base (3) is provided with a mounting slot (301), and the conductive inlet row (b) is mounted in the mounting slot (301) and is limited in position.

4. A grid-connected box according to claim 2, characterized in that: The conductive inlet bus (b) is a conductive copper bus.

5. A grid-connected box according to claim 2, characterized in that: An insulating partition (4) is provided between the conductive incoming line rows (b) between each phase of the switch module (c).

6. A grid-connected box according to claim 5, characterized in that: The circuit breaker module (c1) comprises a screw inlet terminal (c101) and a plug-in outlet terminal (c102), wherein the screw inlet terminal (c101) is connected to an external circuit, and the plug-in outlet terminal (c102) is plugged into a conductive inlet row (b).

7. A grid-connected box according to claim 2, characterized in that: The surge module (c2) comprises a plug-in line terminal (c201) and a screw line terminal (c202), wherein the plug-in line terminal (c201) is plugged into the conductive line bus (b), and the screw line terminal (c202) is grounded.

8. A grid-connected box according to claim 2, characterized in that: The reclosing module (c3) comprises a plug-in line terminal 2 (c301) and a screw line terminal 2 (c302), wherein the plug-in line terminal 2 (c301) is plugged into a conductive line bus (b), and the screw line terminal 2 (c302) is externally connected to an electric meter.

9. A grid-connected box according to claim 2, characterized in that: The circuit breaker module (c1) includes a screw inlet terminal (c101) and a plug-in outlet terminal (c102), the surge module (c2) includes a plug-in inlet terminal 1 (c201) and a screw outlet terminal 1 (c202), the reclosing module (c3) includes a plug-in inlet terminal 2 (c301) and a screw outlet terminal 2 (c302), the external circuit is connected to the product from the screw inlet terminal (c101), and the plug-in outlet terminal (c102 ) is connected to the plug-in terminal 1 (c201), and the screw terminal 1 (c202) is grounded, so that the circuit breaker module (c1) and the surge module (c2) are connected in parallel; the plug-in terminal (c102) is also connected to the plug-in terminal 2 (c301), and the screw terminal 2 (c302) is connected to an external circuit, so that the reclosing module (c3) and the circuit breaker module (c1) are connected in series.

10. A grid-connected box according to claim 1, characterized in that: A boss groove (302a) is provided above the cover (302) of the base (3) for limiting the installation of the switch module (c).

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