Photovoltaic junction box with stable structure

Abstract

A photovoltaic junction box with a stable structure comprises a box body, a box cover and a diode module arranged in the box body, positioning columns are arranged on the inner bottom face of the box body, positioning holes are correspondingly machined in metal supports of the diode module, the upper ends of the positioning columns penetrate through the first positioning holes in a matched mode and then are riveted and fixed, and integrated reinforcing ribs are arranged at the corners of an inner cavity of the box body. The right end of the box body is provided with a wiring port, a wire pressing block is installed in the wiring port in an embedded mode and fixed through ultrasonic welding, the wire pressing block and the wiring port define a complete circular wire passing hole, a limiting groove is machined in the opposite side wall of the wiring port, and the inner wall face of the limiting groove is machined to form an inclined face. The two sides of the wire pressing block are provided with guide blocks matched with the limiting grooves, and the sides, facing the slopes, of the guide blocks are provided with first strip-shaped convex ribs. The junction box is compact and small in internal structure and accurate in positioning, and is matched with the heat dissipation pieces and the heat dissipation holes to realize rapid heat dissipation.

Description

TECHNICAL FIELD

[0001] The utility model relates to a conveying device, especially a kind of photovoltaic junction box with stable structure. BACKGROUND

[0002] Solar photovoltaic junction box is an important component of solar cell module, and is the connector between solar cell array and solar cell charging control device. Diode is the core component in photovoltaic junction box, which is used as one-way current conducting electronic component. Since diode is one of the most easily heated components in the entire photovoltaic system, the heat dissipation problem of photovoltaic junction box needs to be solved urgently. SUMMARY

[0003] In view of the above problems, the utility model provides a kind of photovoltaic junction box with stable structure.

[0004] To achieve the above object, the utility model provides a kind of photovoltaic junction box with stable structure, including box body, box cover, the diode module being arranged in the box body, the diode module includes metal support, diode, heat dissipation piece, the bottom surface of the box body is equipped with positioning column, the metal support is correspondingly machined with positioning hole, the positioning column upper end is riveted fixed after being passed through the positioning hole, the heat dissipation piece is placed between the metal support and the bottom surface in the box body, there is gap between the heat dissipation piece and the box body, the integral reinforcing rib is equipped at the corner of the box body cavity, the recess of the edge of the metal support is machined and corresponds with the reinforcing rib, the reinforcing rib is clamped into the recess and forms the limiting of the metal support, the box body right end is equipped with wiring port, the pressure wire block is embeddedly installed in the wiring port, the pressure wire block and the wiring port are enclosed to form complete circular wire hole, the pressure wire block and the wiring port are fixed by ultrasonic welding, the limiting slot is machined on the opposite side wall of the wiring port, the inner wall of the limiting slot is machined to form inclined plane, the guide block is equipped on both sides of the pressure wire block and matched with the limiting slot, the first strip convex rib is arranged on the side of the guide block towards the inclined plane, and the first strip convex rib is pressed on the inclined plane.

[0005] As a further improvement of the utility model, the positioning column is in the form of a variable-diameter shaft structure and has a step portion, and the lower part of the metal support abuts against the step portion.

[0006] As a further improvement of the utility model, a tapered avoidance slot is arranged in the middle of the bottom surface of the box body for avoiding the diode, and the cross section of the avoidance slot is in the form of a tapered structure.

[0007] As a further improvement of the utility model, a bus hole is arranged in the bottom of the box body for connecting the bus ribbon.

[0008] As a further improvement of the utility model, the bottom of the box body and the metal support and the position corresponding to the diode are all processed with heat dissipation holes.

[0009] As a further improvement of the utility model, the box body side wall is provided with buckles near the opening, the box cover is processed with clamping grooves matched with the buckles, after the box cover is covered, the bottom surface of the box cover abuts on the reinforcing rib, and the buckles are clamped and positioned with the clamping grooves.

[0010] As a further improvement of the utility model, the box cover lower edge is processed with a guide inclined surface.

[0011] As a further improvement of the utility model, the box body bottom surface is processed with a welding groove near one side of the wiring port, and the welding groove extends to the wiring port.

[0012] As a further improvement of the utility model, the wiring port and the inner wall of the wire pressing block opposite to each other are provided with a semi-annular convex rib and a semi-annular convex rib I in correspondence, the semi-annular convex rib and the semi-annular convex rib I are arranged in a staggered manner, the upper portion of the wire pressing block is axially provided with a second strip-shaped convex rib at the joint with the wiring port, and the second strip-shaped convex rib is pressed against the inner end surface of the wiring port.

[0013] The utility model has the advantages of:

[0014] 1. The wiring box has compact and small internal structure, accurate positioning, cooperation with the heat dissipation member and the heat dissipation hole, the heat dissipation member is fixed at the lower portion of the metal support, there is a gap between the heat dissipation member and the inner bottom surface of the box body, the heat dissipation member accelerates heat dissipation of the metal support without transferring heat to the box body, the overall heat dissipation efficiency of the wiring box is improved, and rapid heat dissipation is realized.

[0015] 2. The wire pressing block and the wiring port of the box body adopt an inclined surface cooperation mode, rapid assembly is realized.

[0016] 3. The box body inner side wall is provided with a reinforcing rib, the upper portion of the reinforcing rib can support the box cover, the reinforcing rib side wall is used for limiting the metal support, and meanwhile, the arrangement of the reinforcing rib also reduces the volume of the box body inner cavity, when the box body is filled with sealing glue, the amount of the sealing glue is effectively reduced.

[0017] 4. The box body bottom is processed with a welding groove near the wiring port position, the wiring port position is further increased, and external cables and the metal support are conveniently welded and positioned. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an explosion view of the utility model photovoltaic wiring box with stable structure;

[0019] Figure 2 It is a box body 1 three-dimensional view Figure One ;

[0020] Figure 3A perspective view of the box body 1 Figure Two ;

[0021] Figure 4 A perspective view of the crimping block;

[0022] Figure 5 A side view of the crimping block;

[0023] Figure 6 A perspective view of the box cover.

[0024] In the figure: 1, box body; 11, positioning column; 111, step part; 12, convergence hole; 13, avoiding slot; 14, heat dissipation hole; 15, welding groove; 16, reinforcing rib; 17, buckle; 18, wiring port; 181, limiting slot; 182, inclined surface; 183, semi-annular convex rib; 2, diode module; 21, metal support; 211, positioning hole; 212, groove; 22, diode; 23, heat dissipation piece; 3, box cover; 31, clamping groove; 32, guide inclined surface; 4, crimping block; 41, guide block; 42, first strip-shaped convex rib; 43, second strip-shaped convex rib; 44, semi-annular convex rib I. DETAILED DESCRIPTION

[0025] As Figure 1 shown, the utility model discloses a kind of photovoltaic junction box of stable structure, including box body 1, box cover 3, diode module 2 in box body 1, diode module 2 includes metal support 21, diode 22, heat dissipation piece 23, bottom surface in box body 1 is equipped with positioning column 11, positioning hole 211 is correspondingly machined on metal support 21, positioning column 11 upper end is riveted fixed after being cooperated to pass through positioning hole 211, positioning column 11 is variable-diameter shaft structure and is formed with step part 111, metal support 21 lower part is abutted on step part 111, heat dissipation piece 23 is between metal support 21 and bottom surface in box body 1, heat dissipation piece 23 upper part is fixed with metal support 21, heat dissipation piece 23 has gap between metal support 21, bottom surface in box body 1 middle part is equipped with the avoiding slot 13 of conical for avoiding diode 22, the section of avoiding slot 13 is conical structure, convergence hole 12 is set up for accessing convergence band for box body 1 bottom, bottom of box body 1 and metal support 21 and diode 22 position corresponded place are all machined heat dissipation hole 14, one-piece reinforcing rib 16 is equipped at corner of cavity in box body 1, groove 212 is correspondingly machined on the edge of metal support 21, reinforcing rib 16 is clamped into groove 212, and metal support 21 is formed with limit by reinforcing rib 16, box body 1 side wall is equipped with buckle 17 (see Figure 2 ) near opening, box cover 3 is machined clamping groove 31 and is matched with buckle 17 (see Figure 6 ), after box cover 3 covers, bottom surface of box cover 3 is abutted on reinforcing rib 16, buckle 17 is positioned with clamping groove 31, guide inclined surface 32 is formed by processing at the edge of lower part of box cover 3, box body 1 right end is equipped with wiring port 18 (see Figure 3), the wire pressing block 4 is embeddedly arranged in the wire port 18, the wire pressing block 4 and the wire port 18 form a complete circular wire hole, the wire pressing block 4 and the wire port 18 are fixed by ultrasonic welding, the opposite side wall of the wire port 18 is provided with a limiting groove 181, the inner wall of the limiting groove 181 is provided with a slope 182, the two sides of the wire pressing block 4 are provided with guide blocks 41 matched with the limiting groove 181, one side of the guide block 41 towards the slope 182 is provided with a first strip-shaped convex rib 42, the first strip-shaped convex rib 42 is pressed on the slope 182, the wire port 18 and the wire pressing block 4 are correspondingly provided with a semi-annular convex rib 183 and a semi-annular convex rib I 44 on the opposite inner walls, the semi-annular convex rib 183 and the semi-annular convex rib I 44 are arranged in a staggered manner, the upper portion of the wire pressing block 4 is axially provided with a second strip-shaped convex rib 43 (see Figure 4 , Figure 5 ), the second strip-shaped convex rib 43 is pressed on the inner end surface of the wire port 18, the bottom surface of the box body 1 is provided with a welding groove 15 near the wire port 18, and the welding groove 15 extends to the wire port 18.

[0026] The wire distribution box has the advantages that the internal structure of the wire distribution box is compact and small, accurate positioning is achieved, the heat dissipation piece is fixed at the lower portion of the metal support, there is a gap between the heat dissipation piece and the inner bottom surface of the box body, heat is not transmitted to the box body while the heat dissipation of the metal support is accelerated, the overall heat dissipation efficiency of the wire distribution box is improved, rapid heat dissipation is achieved, the wire port of the wire pressing block and the box body is matched in a slope manner, rapid assembly is achieved, the reinforcing rib is arranged on the inner side wall of the box body, the upper portion of the reinforcing rib can support the box cover, the side wall of the reinforcing rib is used for limiting the metal support, meanwhile, the arrangement of the reinforcing rib also reduces the volume of the inner cavity of the box body, the amount of sealing glue is effectively reduced when the sealing glue is filled in the box body, the welding groove is arranged on the bottom of the box body near the wire port, the position of the wire port is further increased, and the external cable and the metal support are conveniently welded and positioned.

[0027] In specific use, the utility model is described in combination with the drawings for the convenience of understanding the utility model;

[0028] In assembly, the diode module is assembled as a whole in the box body, the positioning holes on the metal support correspond to the positioning columns in the box body one by one, the positioning columns are riveted and fixed after passing through the positioning holes, the reinforcing ribs on the side wall of the box body abut against the grooves on the side of the metal support, the heat dissipation member is arranged between the metal support and the box body, after the diode module is positioned, external cables are installed at the wiring port position of the box body, the positions welded between the metal and the external cables are just at the welding groove position, the welding groove is communicated with the wiring port, the welding position is large, and resistance welding or other welding modes can be used between the external cables and the metal support; the wire pressing block is assembled again, since the inclined surface structure is used between the wire pressing block and the wiring port for press-fitting, assembly is convenient, after the wire pressing block is pressed in, the wire pressing block and the wiring port are fixed by ultrasonic welding; when the client uses, the bus bar is installed, the bus bar is welded and fixed with the metal support after passing through the bus hole on the box body, then the box cover is covered, the box cover has a guide inclined surface at the lower part, the box cover is convenient to be clamped into the opening at the upper part of the box body, then the bottom of the box cover abuts against the upper part of the reinforcing rib, the buckle on the upper part of the side wall of the box body is buckled and positioned with the clamping groove on the upper edge of the box cover, the box body can be filled with sealant through the heat dissipation holes, so that the whole wiring box is sealed, and the use amount of the sealant is reduced to a certain extent by the reinforcing rib.

[0029] The preferred embodiments of the utility model are described above only, and are not used for limiting the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A structurally stable photovoltaic junction box, characterized by: The utility model provides a diode module, including box (1), box cover (3), be located in the diode module (2) of box (1) in, the diode module (2) includes metal support (21), diode (22), heat dissipation piece (23), the bottom surface of box (1) is equipped with positioning column (11), the metal support (21) on corresponding processing has the positioning hole (211), the positioning column (11) upper end cooperation passes through the positioning hole (211) after riveting fixed, the heat dissipation piece (23) is placed between the metal support (21) and the bottom surface in box (1), the heat dissipation piece (23) with the clearance between box (1), the integral reinforcing rib (16) is equipped in the cavity corner of box (1), the recess (212) of the edge of metal support (21) is corresponding with the reinforcing rib (16), the reinforcing rib (16) is clamped into the recess (212) and forms the location of metal support (21), the right -hand member of box (1) is equipped with wiring port (18), the embedded type mounting of wiring port (18) is equipped with the wire pressing block (4), the wire pressing block (4) and wiring port (18) surround and form the complete circular wire hole, the wire pressing block (4) and wiring port (18) between it adopts ultrasonic welding fixed, the opposite side wall of wiring port (18) is processed limit slot (181), the inner wall of limit slot (181) is processed and forms the inclined plane (182), the wire pressing block (4) both sides are equipped with the guide block (41) with limit slot (181) is matched, the first strip convex rib (42) of the side of guide block (41) is equipped with the inclined plane (182), and the first strip convex rib (42) is pressed on the inclined plane (182).

2. A structurally stable photovoltaic junction box according to claim 1, characterized in that: The positioning column (11) is in the form of a variable-diameter shaft and has a step portion (111), and the lower part of the metal support (21) abuts against the step portion (111).

3. A structurally stable photovoltaic junction box according to claim 1, characterized in that: A tapered avoidance groove (13) is arranged in the middle of the bottom surface of the box (1) to avoid the diode (22), and the cross section of the avoidance groove (13) is in the form of a tapered structure.

4. A structurally stable photovoltaic junction box according to claim 1, characterized in that: A convergence hole (12) is arranged in the bottom of the box (1) to connect a convergence band.

5. A structurally stable photovoltaic junction box according to claim 1, wherein: Cooling holes (14) are arranged in the bottom of the box (1) and correspond to the positions of the metal support (21) and the diode (22).

6. A structurally stable photovoltaic junction box according to claim 1, wherein: A buckle (17) is arranged on the side wall of the box (1) near the opening, a clamping groove (31) is arranged on the box cover (3) and matches the buckle (17), and the bottom surface of the box cover (3) abuts against the reinforcing rib (16) after the box cover (3) is covered, and the buckle (17) is clamped and positioned with the clamping groove (31).

7. A structurally stable photovoltaic junction box according to claim 1, wherein: A guide inclined surface (32) is arranged at the lower edge of the box cover (3).

8. A structurally stable photovoltaic junction box according to claim 1, wherein: A welding groove (15) is arranged on the bottom surface of the box (1) near one side of the wiring port (18), and the welding groove (15) extends to the wiring port (18).

9. A structurally stable photovoltaic junction box according to claim 1, wherein: The inner wall of the terminal port (18) and the wire pressing block (4) is provided with a semi-annular convex rib (183) and a semi-annular convex rib I (44) correspondingly, the semi-annular convex rib (183) and the semi-annular convex rib I (44) are arranged in a staggered manner, and the upper portion of the wire pressing block (4) is provided with a second strip-shaped convex rib (43) axially at the joint with the terminal port (18), and the second strip-shaped convex rib (43) is pressed on the inner end surface of the terminal port (18).

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