CN209046591U - A kind of cover board and terminal box - Google Patents

Abstract

The utility model relates to photovoltaic technology field, disclose a kind of cover board and terminal box, cover board is used to cover the box body in terminal box, including cover board body, one of surface of cover board body is equipped with a circle glue groove, glue groove is for filling sealing material, and the width of glue groove is greater than the thickness of the side wall of box body；Terminal box includes box body, is placed in the intracorporal diode assembly of box and above-mentioned cover board, and the end of box body is inserted into the glue groove of cover board, and sealing material is filled between the end and glue groove of box body.By the way that glue groove is arranged on cover board body, sealing material can be filled in glue groove, because sealing material has very strong adhesive property, the box body of cover board body and terminal box can be tightly fastened by sealing material, instead of the sealing structure of buckle and rubber ring, and the structure of glue groove is simple, sealing effect is more preferable；When the cover board is applied in the terminal box of encapsulating, under the action of casting glue and sealing material, wire box can be docked and carry out dual-seal, improve sealing effect.

Description

A cover plate and a junction box

technical field

The utility model relates to the field of photovoltaic technology, in particular to a cover plate and a junction box.

Background technique

The solar junction box is a connector between the solar cell array composed of solar cell components and the solar charging control device, providing users with a combined connection scheme for solar panels. The solar junction box is very important in the composition of the solar module, and its main function is to connect the electricity generated by the solar cell with the external lines. The junction box is bonded with the backplane of the photovoltaic module through the sealing material, and then placed in the frame. The busbars in the module are connected together through the internal lines in the junction box, and the internal lines are connected with the external cables, so that the modules are connected to the external cables. The external cable is connected. A diode is arranged in the junction box to ensure that the component can work normally when it is blocked from light.

The junction box mainly plays the role of current output and preventing hot spots in photovoltaic modules. When a hot spot occurs in the photovoltaic module, the junction box starts to work, and its internal diode will short-circuit the battery string that generates the hot spot, thereby ensuring the normal operation of the photovoltaic module.

The solar junction box generates a lot of heat during operation, which will directly affect the performance of the junction box. At present, glue-sealed junction boxes have been widely used in the industry. The sealing material is poured into the junction box. After curing, the sealing material has good insulation and aging resistance, and has excellent thermal conductivity, which is conducive to the heat dissipation of the diode and can effectively improve the power of the junction box. However, the junction box with the glue-filled structure has the following disadvantages:

Although the potting glue has a good sealing effect, the upper cover in the junction box of this structure only plays an anti-impact role, and water and air can still enter the box body. In long-term application, the potting glue and the box body may be peeled off. , resulting in insulation failure.

The other is a non-glue junction box, and the upper cover in the junction box of this structure is sealed with a rubber ring. This structure mainly has the following disadvantages:

1. The upper cover needs to press the sealing ring forwardly through the buckle to achieve the sealing effect, but the sealing effect is poor, and generally it can only reach the IP65 waterproof level;

2. When the buckle is used outdoors for a long time, it is easy to break or loosen, resulting in seal failure.

In view of the above-mentioned defects, the designer actively researches and innovates, in order to create a cover plate and junction box with a new structure, which makes it more valuable in industry.

Utility model content

The purpose of the utility model is to provide a cover plate and a junction box, and the junction box is reinforced and sealed by arranging a structure filled with sealing material on the cover plate.

For this purpose, the utility model adopts the following technical solutions:

A cover plate is used to cover a box body of a junction box, and includes a cover plate body, one surface of the cover plate body is provided with a ring of glue grooves, the glue grooves are used for filling sealing materials, and the The width of the glue groove is greater than the thickness of the side wall of the box body.

By arranging a glue groove on the cover body, the sealing material can be filled in the glue groove. Because the sealing material has strong bonding performance, the cover body and the box body of the junction box can be tightly fixed by the sealing material, instead of the card The sealing structure of the buckle and the rubber ring, and the structure of setting the glue groove is simple, and the sealing effect is better; when the cover plate is applied to the junction box that needs to be filled with glue, under the action of the potting glue and the sealing material, the wiring can be connected. The box is double sealed, which greatly improves the sealing effect.

As a preferred solution of the above-mentioned cover plate, two opposite side walls of the glue tank are provided with inclined surface structures. When filling the sealing material into the glue tank, the inclined surface structure can guide the sealing material to flow to the bottom of the glue groove to ensure the filling effect and the stability of the sealing.

As a preferred solution of the above-mentioned cover plate, the inclination angle of the inclined surface structure is 30°˜60°.

As a preferred solution of the above-mentioned cover plate, the bottom wall of the glue tank is provided with a limit protrusion between the two inclined surface structures. The limit protrusion can limit the depth that the end of the box body of the junction box protrudes into the glue groove, so that there is a gap between the end of the box body and the bottom wall of the glue groove, so that the sealing material can be better filled in the glue groove and the glue groove. between the boxes of the junction box.

As a preferred solution of the above cover plate, the center of the glue tank coincides with the center of the cover plate body. The structure is beautiful.

As a preferred solution of the above-mentioned cover plate, one surface of the cover plate body is vertically provided with a first convex ring and a second convex ring, the center of the first convex ring and the center of the second convex ring Coincidence, the glue groove is formed between the first convex ring and the second convex ring.

As a preferred solution of the above-mentioned cover plate, the second convex ring is located on the inner circumference of the first convex ring, and the height of the first convex ring is higher than the height of the second convex ring. This height limit can prevent the sealing material from overflowing outside the junction box.

As a preferred solution of the above cover plate, the outer wall of the first convex ring is flush with the peripheral edge of the cover plate body. The structure is beautiful.

As a preferred solution of the above-mentioned cover plate, the inner wall of the first convex ring and/or the second convex ring is provided with a plurality of convex structures or concave structures. Using the convex structure or the concave structure can make the sealing material adhere to the inner wall of the first convex ring and/or the second convex ring more stably.

As a preferred solution of the above-mentioned cover plate, the cross section of the convex structure or the concave structure is an arc shape.

The junction box provided by the present invention includes a box body, a diode assembly placed in the box body, and the above-mentioned cover plate, the end of the box body is inserted into the glue groove of the cover plate, and the box A sealing material is filled between the end of the body and the glue groove. The junction box has a good sealing effect.

The beneficial effect of the cover plate provided by the utility model is that: by arranging a glue groove on the cover plate body, the sealing material can be filled in the glue groove. It is tightly fixed with the box body of the junction box, replacing the sealing structure of the buckle and the rubber ring, and the structure of setting the glue groove is simple, and the sealing effect is better; when the cover is applied to the junction box that needs to be filled with glue, Under the action of sealant and sealing material, the junction box can be double-sealed, which greatly improves the sealing effect.

The beneficial effect of the junction box provided by the utility model is: by inserting the end of the box body into the glue groove of the cover plate, and filling the sealing material between the end of the box body and the glue groove, the bonding performance of the sealing material is improved. The cover plate and the box body can be tightly fixed without using the complicated sealing method of the buckle and the rubber ring, which simplifies the sealing structure of the cover plate and the box body, and at the same time ensures the sealing effect.

Description of drawings

1 is a schematic structural diagram of a cover plate provided by a specific embodiment of the present invention;

Fig. 2 is a sectional view at A in Fig. 1;

3 is a cross-sectional view of a junction box provided by a specific embodiment of the present invention;

FIG. 4 is an enlarged schematic view of B in FIG. 3 .

In the figure: 10-cover, 11-cover body, 12-glue groove, 13-slope structure, 14-first convex ring, 15-second convex ring, 16-protrusion structure, 17-limiting protrusion , 20-box body, 30-diode assembly, 40-sealing material.

Detailed ways

The technical solutions of the present utility model will be further described below with reference to the accompanying drawings and through specific embodiments.

As shown in FIGS. 1 to 4 , the cover plate 10 of the present invention is used to cover the box body 20 of the junction box. The cover plate 10 includes a cover plate body 11 , and one surface of the cover plate body 11 is provided with a ring of glue The groove 12, the center of the glue groove 12 coincides with the center of the cover body 11, the glue groove 12 is used for filling the sealing material 40, and the width of the glue groove 12 is greater than the thickness of the side wall of the box body 20. By arranging the glue groove 12 on the cover body 11, the sealing material 40 can be filled in the glue groove 12. Because the sealing material 40 has strong bonding performance, the cover body 11 and the box of the junction box can be connected by the sealing material 40. The body 20 is tightly fixed, replacing the sealing structure of the buckle and the rubber ring, and the structure of setting the glue groove 12 is simple, and the sealing effect is better; when the cover plate 10 is applied to the junction box that needs to be filled with glue Under the action of the sealing material, the junction box can be double-sealed, which greatly improves the sealing effect. The sealing material 40 in the present invention can be silica gel, which has low cost and good sealing effect.

In order to ensure the sealing effect, the present invention is provided with inclined surface structures 13 on two opposite side walls of the glue groove 12 . When filling the sealing material 40 into the glue tank 12 , the inclined surface structure 13 can guide the sealing material 40 to flow to the bottom of the glue groove 12 to ensure the filling effect and thus the sealing stability. As a preferred embodiment, the inclination angle of the inclined surface structure 13 is 30°˜60°, which can be specifically set according to the actual use situation.

In addition, in the present invention, the bottom wall of the glue groove 12 is also provided with a limit protrusion 17 between the two inclined surface structures 13, and the limit protrusion 17 can limit the end of the box body 20 of the junction box to protrude into the glue groove 12, so that there is a gap between the end of the box body 20 and the bottom wall of the glue groove 12, so that the sealing material 40 can be better filled between the glue groove 12 and the box body 20 of the junction box, which further ensures the sealing Effect.

For the formation of the glue groove 12, a circle of grooves can be recessed on the surface of the cover plate body 11, or a first convex ring 14 and a second convex ring 15 can be vertically provided on one surface of the cover plate body 11. The center of a convex ring 14 coincides with the center of the second convex ring 15 , and a glue groove 12 is formed between the first convex ring 14 and the second convex ring 15 . Considering the hardness requirements of the cover plate 10 , it is more preferable to form the glue groove 12 by arranging the first convex ring 14 and the second convex ring 15 . In addition, the second convex ring 15 is located at the inner circumference of the first convex ring 14, and the height of the first convex ring 14 is higher than the height of the second convex ring 15. The height limit can prevent the sealing material 40 from overflowing outside the junction box.

From the aesthetic point of view of the cover plate 10 , the outer wall of the first convex ring 14 can be flush with the periphery of the cover plate body 11 , that is, the first convex ring 14 is formed by vertically extending from the edge of the cover plate body 11 .

In order to further improve the adhesion between the sealing material 40 and the glue groove 12 , in the present invention, a plurality of convex structures 16 or concave structures are provided on the inner wall of the first convex ring 14 and/or the second convex ring 15 . In this embodiment, the protruding structure 16 is provided as an example to illustrate. By using the protruding structure 16, the inner wall of the first convex ring 14 and/or the second convex ring 15 in contact with the sealing material 40 can be non-planar, but the sealing material 40 is more Stably attached to the inner wall of the first convex ring 14 and/or the second convex ring 15 . Specifically, the cross section of the protruding structure 16 or the concave structure is a superior arc shape, and the superior arc structure further reduces the possibility of the sealing material 40 slipping off relative to the inner wall of the first convex ring 14 and/or the second convex ring 15 .

The junction box provided by the present invention is shown in FIG. 3 and FIG. 4. The junction box includes a box body 20, a diode assembly 30 placed in the box body 20, and the above-mentioned cover plate 10. The end of the box body 20 is inserted into the cover plate. In the glue tank 12 of 10 , a sealing material 40 is filled between the end of the box body 20 and the glue groove 12 . By inserting the end of the box body 20 into the glue groove 12 of the cover plate 10, and filling the sealing material 40 between the end of the box body 20 and the glue groove 12, the adhesive property of the sealing material 40 can make the cover plate 10 It is tightly fixed with the box body 20 and does not need to adopt a complex sealing method of a buckle and a rubber ring, which simplifies the sealing structure of the cover plate 10 and the box body 20 and ensures the sealing effect.

The technical principle of the present invention has been described above with reference to the specific embodiments. These descriptions are only for explaining the principle of the present invention, and should not be construed as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can think of other specific embodiments of the present invention without creative efforts, and these methods will all fall within the protection scope of the present invention.

Claims (10)

1. a kind of cover board, for covering the box body (20) in terminal box, which is characterized in that including cover board body (11), the lid One of surface of plate ontology (11) is equipped with circle glue groove (12), and the glue groove (12) is used to fill sealing material (40), And the width of the glue groove (12) is greater than the thickness of the side wall of the box body (20).

2. cover board according to claim 1, which is characterized in that the opposite two side walls of the glue groove (12) are equipped with inclined-plane Structure (13).

3. cover board according to claim 2, which is characterized in that the tilt angle of the bevel structure (13) be 30 °~ 60°。

4. cover board according to claim 2, which is characterized in that in two inclined-plane knots on the bottom wall of the glue groove (12) Retention bead (17) are equipped between structure (13).

5. cover board according to claim 1-4, which is characterized in that one of table of the cover board body (11) The first flange collar (14) and the second flange collar (15), the center of first flange collar (14) and second flange collar are vertically equipped on face (15) center is overlapped, and forms the glue groove (12) between first flange collar (14) and second flange collar (15).

6. cover board according to claim 5, which is characterized in that second flange collar (15) is located at first flange collar (14) It inside encloses, and the height of first flange collar (14) is higher than the height of second flange collar (15).

7. cover board according to claim 6, which is characterized in that the outer wall and the cover board body of first flange collar (14) (11) periphery flushes.

8. cover board according to claim 5, which is characterized in that first flange collar (14) and/or second flange collar (15) inner wall is equipped with multiple bulge-structures (16) or sunk structure.

9. cover board according to claim 8, which is characterized in that the section of the bulge-structure (16) or the sunk structure For major arc shape.

10. a kind of terminal box, which is characterized in that including box body (20), the diode assembly (30) being placed in the box body (20) And the described of the cover board (10) is inserted into such as described in any item cover boards of claim 1-9 (10), the end of the box body (20) In glue groove (12), and sealing material (40) are filled between the end of the box body (20) and the glue groove (12).