Photovoltaic junction box

Abstract

The utility model belongs to the technical field of photovoltaic junction boxes, and particularly relates to a photovoltaic junction box which comprises a photovoltaic junction box body, a photovoltaic junction box cable fixing assembly is installed on the side of the photovoltaic junction box body, and a photovoltaic junction box sealing assembly is installed on the top of the photovoltaic junction box body. The photovoltaic junction box comprises a photovoltaic junction box body and a photovoltaic junction box cable fixing assembly, a photovoltaic junction box heat dissipation assembly is arranged at the bottom of the photovoltaic junction box body, the photovoltaic junction box cable fixing assembly comprises a photovoltaic junction box cable main body, the end of the photovoltaic junction box cable main body is electrically connected with a photovoltaic junction box connector, and the outer portion of the photovoltaic junction box cable main body is fixedly connected with a glue blocking plate. A glue flowing hole is formed in the bottom of the glue blocking plate; according to the utility model, while the cable is fixed and prevented from falling off, the overall sealing performance of the junction box can be ensured, and the heat dissipation assembly made of an insulating material is arranged, so that heat generated in the working process of the junction box can be conveniently dissipated.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic junction box technical field, specifically a photovoltaic junction box. BACKGROUND

[0002] The photovoltaic junction box is the connecting device between the solar cell array formed by the solar cell module and the solar charging control device, and the main function is to connect and protect the solar photovoltaic module, connect the power generated by the solar cell with the external line, and conduct the current generated by the photovoltaic module.

[0003] In Chinese patent 202023105780.6, the utility model relates to the field of junction box, disclose a kind of photovoltaic junction box, including box body, first wire inlet pipe and second wire inlet pipe are coaxially arranged on the opposite sides of box body, two lead screws are arranged in parallel in box body, the plane where two lead screws are located is perpendicular to the axis of first wire inlet pipe, outer thread is opened in the opposite direction of lead screw two ends, and upper clamping plate and lower clamping plate are respectively screwed, so that upper clamping plate and lower clamping plate can be close to each other or away from each other, when upper clamping plate and lower clamping plate abut, abutment surface coincides with the axis of first wire inlet pipe. It can effectively fix the cable joint, and effectively prevent the joint from being pulled off by external force.

[0004] The existing photovoltaic junction box uses a lead screw with upper and lower clamping plates to clamp and fix the cable to prevent the junction from falling off when being pulled, but the lead screw and the junction box body are connected by threads, which makes it difficult to ensure the sealing of the entire junction box. Rainwater, dust and other impurities from the outside may enter the junction box, which may damage the electrical connection and even cause a fire. The existing junction box lacks a heat dissipation mechanism, and the heat generated by the electrical components inside the junction box after a long time of work is difficult to dissipate, which may cause short circuit or aging of the internal components of the junction box.

[0005] Therefore, a photovoltaic junction box is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0006] To make up for the shortcomings of the prior art, the existing photovoltaic junction box uses a lead screw with upper and lower clamping plates to clamp and fix the cable to prevent the junction from falling off when being pulled, but the lead screw and the junction box body are connected by threads, which makes it difficult to ensure the sealing of the entire junction box. Rainwater, dust and other impurities from the outside may enter the junction box, which may damage the electrical connection and even cause a fire. The existing junction box lacks a heat dissipation mechanism, and the heat generated by the electrical components inside the junction box after a long time of work is difficult to dissipate, which may cause short circuit or aging of the internal components of the junction box.

[0007] The utility model discloses a technical scheme that solves its technical problem is adopted: a kind of photovoltaic junction box of the utility model, including photovoltaic junction box box body, the side of the photovoltaic junction box box body is equipped with photovoltaic junction box cable fixed component, and the top of photovoltaic junction box box body is equipped with photovoltaic junction box sealing assembly, and the bottom of photovoltaic junction box box body is provided with photovoltaic junction box heat radiation component, the photovoltaic junction box cable fixed component includes photovoltaic junction box cable main part, the end of the photovoltaic junction box cable main part is electrically connected with photovoltaic junction box connector, and the outside of photovoltaic junction box cable main part is fixedly connected with rubber baffle, the bottom of the rubber baffle is equipped with glue flow hole, and the outside of rubber baffle is hingedly connected with U type cable bayonet, and the side of rubber baffle is closely attached with cable anti-coming-off clamping plate.

[0008] Preferably, the outer diameter of the cable anti-coming-off clamping plate is greater than the inner diameter of the U-shaped cable bayonet, and the cable anti-coming-off clamping plate is symmetrically provided with two about the vertical central axis of the U-shaped cable bayonet, the rubber baffle and the photovoltaic junction box box body form a clamping structure, and the top surface of the rubber baffle and the top surface of the photovoltaic junction box box body are in the same horizontal line, and the outer wall of the rubber baffle and the outer wall of the photovoltaic junction box box body are in the same vertical plane.

[0009] Preferably, the photovoltaic junction box sealing assembly includes a photovoltaic junction box sealing cover, the bottom of the photovoltaic junction box sealing cover is fixedly connected with a photovoltaic junction box sealing rubber ring, and the end of the photovoltaic junction box sealing cover is threadedly connected with a dismounting bolt, the top end of the dismounting bolt is nested with a threaded hole sealing rubber gasket, the outside of the dismounting bolt is threadedly connected with a dismounting screw hole column, and the outside of the dismounting screw hole column is fixedly connected with a box body reinforcing corner block.

[0010] Preferably, the photovoltaic junction box sealing cover and the dismounting screw hole column form a thread detachable structure through the dismounting bolt, and the photovoltaic junction box sealing cover and the photovoltaic junction box box body form a sealing structure through the photovoltaic junction box sealing rubber ring, the cross-sectional shape of the box body reinforcing corner block is set as a right triangle, and two pairs of the box body reinforcing corner blocks are symmetrically provided about the vertical central axis of the photovoltaic junction box box body.

[0011] Preferably, the photovoltaic junction box heat radiation component includes a photovoltaic junction box terminal plate, the bottom of the photovoltaic junction box terminal plate is closely attached with a heat conductor, and the bottom of the heat conductor is fixedly connected with a heat sink.

[0012] Preferably, the heat conductor and the heat sink form a communication structure, the heat sinks are equally spaced about the bottom of the heat conductor, and the inside of the heat conductor and the heat sink is filled with heat-conducting silicone grease.

[0013] Preferably, the material of the photovoltaic junction box body and the photovoltaic junction box sealing cover is set as BPT fireproof plastic material, and the outer wall of the photovoltaic junction box body and the photovoltaic junction box sealing cover is coated with protective paint, and the material of the protective paint is set as ceramic nano paint.

[0014] The utility model discloses the beneficial effect lies in:

[0015] 1. The utility model discloses a photovoltaic junction box cable fixing assembly, and two cable anti -drop clamping plates are blocked at the hole two sides of the photovoltaic junction box cable main body and the photovoltaic junction box body connection, can be convenient for the limiting fixing of photovoltaic junction box cable main body, make photovoltaic junction box cable main body unable to slide in the side of photovoltaic junction box body, and further convenient for preventing the outside's drag and leading to the loose connection of photovoltaic junction box cable main body, and the inside of U type cable clamp is filled with two -component silica gel, and the connection of photovoltaic junction box cable main body and photovoltaic junction box body is sealed, and the sealing of junction box sealing box whole is guaranteed, and further convenient for the protection of electrical element in it, and convenient for improving the overall service life.

[0016] 2. The utility model discloses a photovoltaic junction box sealing assembly, and the box body reinforcing corner block of right triangle setting is located at four corner places of photovoltaic junction box body, convenient for enhancing the strength and stability of photovoltaic junction box body, convenient for preventing stress deformation and affecting use, and photovoltaic junction box sealing rubber ring and threaded hole sealing rubber pad guarantee the sealing property, and prevent the outside's rain, dust and other impurities and affect the normal work of electrical element in junction box.

[0017] 3. The utility model discloses a photovoltaic junction box heat dissipation assembly, and a plurality of heat radiators are arranged at equal intervals, which can increase the contact area with the outside air, thereby improving the heat dissipation effect, and the use of heat-conducting silicon instead of metal heat radiators can ensure insulation and prevent electric shock. ACCURATE DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor intensity.

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the whole opening state of the utility model;

[0020] Figure 2 It is a three-dimensional structure schematic diagram of the whole closing state of the utility model;

[0021] Figure 3It is the explosion structure schematic view of the cable fixing assembly part of the utility model photovoltaic junction box.

[0022] Figure 4 It is the three-dimensional structure schematic view of the utility model photovoltaic junction box sealing assembly part.

[0023] Figure 5 It is the three-dimensional structure schematic view of the utility model photovoltaic junction box heat dissipation assembly part.

[0024] In the drawing: 1, photovoltaic junction box body; 2, photovoltaic junction box cable fixing assembly; 3, photovoltaic junction box sealing assembly; 4, photovoltaic junction box heat dissipation assembly; 201, photovoltaic junction box cable main body; 202, photovoltaic junction box connector; 203, glue blocking plate; 204, glue flow hole; 205, U-shaped cable bayonet; 206, cable anti-dropping clamp plate; 301, photovoltaic junction box sealing cover; 302, photovoltaic junction box sealing rubber ring; 303, dismounting bolt; 304, threaded hole sealing rubber gasket; 305, dismounting screw hole column; 306, box body reinforcing corner block; 401, photovoltaic junction box terminal plate; 402, heat conductor; 403, heat sink. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Embodiment one

[0027] As shown in Figure 1 A kind of photovoltaic junction box, including photovoltaic junction box body 1, the side of photovoltaic junction box body 1 is equipped with photovoltaic junction box cable fixing assembly 2, and the top of photovoltaic junction box body 1 is equipped with photovoltaic junction box sealing assembly 3, and the bottom of photovoltaic junction box body 1 is provided with photovoltaic junction box heat dissipation assembly 4, the material of photovoltaic junction box body 1, photovoltaic junction box sealing cover 301 is all set to BPT fireproof plastic material, and the outer wall of photovoltaic junction box body 1, photovoltaic junction box sealing cover 301 is coated with protective paint, and the material of protective paint is set to ceramic nano coating.

[0028] As shown in Figure 3As shown, a kind of photovoltaic junction box, photovoltaic junction box cable fixing assembly 2 is used to prevent cable from falling off, the outer diameter of cable anti-escape clamp plate 206 is greater than the inner diameter of U-shaped cable clamp 205, and cable anti-escape clamp plate 206 is symmetrically provided with two about vertical central axis of U-shaped cable clamp 205, and the top surface of glue baffle 203 and the top surface of photovoltaic junction box body 1 are in the same horizontal line, and the outer wall of glue baffle 203 and the outer wall of photovoltaic junction box body 1 are in the same vertical plane, and two cable anti-escape clamp plates 206 are blocked on the hole of the side of photovoltaic junction box cable main body 201 and photovoltaic junction box body 1, to facilitate the limiting and fixing of photovoltaic junction box cable main body 201, so that photovoltaic junction box cable main body 201 cannot slide on the side of photovoltaic junction box body 1, to prevent the connection of photovoltaic junction box cable main body 201 from being loosened by external pulling, and U-shaped cable clamp 205 is filled with two-component silicone inside, to seal the connection of photovoltaic junction box cable main body 201 and photovoltaic junction box body 1, to ensure the sealing of the whole junction box sealing box, to protect the electrical elements inside, to improve the service life.

[0029] As Figure 4 shown, a kind of photovoltaic junction box, photovoltaic junction box sealing assembly 3 is used to seal the junction box, photovoltaic junction box sealing cover 301 is detachably connected with dismounting bolt 303 and dismounting screw hole column 305 by screw thread, and photovoltaic junction box sealing cover 301 is sealed with photovoltaic junction box body 1 by photovoltaic junction box sealing rubber ring 302, the cross-sectional shape of box body reinforcing corner block 306 is set as right triangle, and two pairs of box body reinforcing corner block 306 are symmetrically arranged about vertical central axis of photovoltaic junction box body 1, the right triangle arranged box body reinforcing corner block 306 is located at the four corners of photovoltaic junction box body 1, to enhance the strength and stability of photovoltaic junction box body 1, to prevent stress deformation from affecting use, photovoltaic junction box sealing rubber ring 302 and threaded hole sealing rubber gasket 304 can ensure the sealing, to prevent the outside rain, dust and other impurities from affecting the normal work of electrical elements inside the junction box.

[0030] As Figure 5 shown, a kind of photovoltaic junction box, photovoltaic junction box heat dissipation assembly 4 is used to assist the heat dissipation of the junction box, heat conductor 402 and heat sink 403 are connected, and heat sink 403 is arranged at equal intervals about the bottom of heat conductor 402, and the inside of heat conductor 402 and heat sink 403 is filled with thermal conductive silicone grease, and a plurality of heat sinks 403 arranged at equal intervals can increase the contact area with the outside air, to improve the heat dissipation effect, and the use of thermal conductive silicone instead of metal heat sink can ensure insulation and prevent electric shock.

[0031] Working principle: when the photovoltaic junction box is produced and assembled, the cable main body 201 of the photovoltaic junction box is connected to the terminal plate 401 of the photovoltaic junction box, and the cable main body 201 at the bottom of the glue blocking plate 203 is aligned and clamped into the U-shaped cable clamp 205; the two glue blocking plates 203 and the U-shaped cable clamp 205 cooperate with each other to form a cavity, and the two cable anti-dropping clamping plates 206 are just attached to the inner and outer walls of the U-shaped cable clamp 205, and the two-component silicone is injected into the cavity between the two glue blocking plates 203, and the glue can seep into the gap between the cable anti-dropping clamping plate 206 and the photovoltaic junction box body 1 through the glue flow hole 204, and then the two cable anti-dropping clamping plates 206 can be adhered to the two sides of the U-shaped cable clamp 205, and when the glue surface is flush with the top surface of the glue blocking plate 203, the sealing is completed.

[0032] Then, the photovoltaic junction box sealing cover 301 is aligned and covered on the photovoltaic junction box body 1, the groove in the photovoltaic junction box sealing rubber ring 302 is clamped on the four surfaces of the photovoltaic junction box body 1, the disassembly bolt 303 is aligned with the threaded hole at the end of the photovoltaic junction box sealing cover 301 and is screwed into the inside of the disassembly screw hole column 305, and when the disassembly bolt 303 is completely screwed into the disassembly screw hole column 305, the top surface of the disassembly bolt 303 tightly presses the threaded hole sealing rubber gasket 304 on the top surface of the photovoltaic junction box sealing cover 301 to seal the threaded hole.

[0033] In the working process of the internal electrical elements of the junction box, the heat conductor 402 and the heat sink 403 are composed of a thin outer shell filled with heat-conducting silicon inside, and the generated heat is conducted to the heat sink 403 outside through the heat-conducting silicon inside the heat conductor 402, and the multiple heat sinks 403 arranged at equal intervals can conduct heat to the outside air in the process of contacting the outside air.

[0034] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A photovoltaic junction box, characterized by: The utility model provides a photovoltaic junction box, which comprises a photovoltaic junction box body (1), a photovoltaic junction box cable fixing assembly (2) is mounted on the side of the photovoltaic junction box body (1), a photovoltaic junction box sealing assembly (3) is mounted on the top of the photovoltaic junction box body (1), and a photovoltaic junction box heat dissipation assembly (4) is arranged on the bottom of the photovoltaic junction box body (1). The photovoltaic junction box cable fixing assembly (2) comprises a photovoltaic junction box cable main body (201), the end of the photovoltaic junction box cable main body (201) is electrically connected with a photovoltaic junction box connector (202), the outside of the photovoltaic junction box cable main body (201) is fixedly connected with a glue blocking plate (203), the bottom of the glue blocking plate (203) is provided with a glue flow hole (204), the outside of the glue blocking plate (203) is clampedly connected with a U-shaped cable clamp (205), and the side of the glue blocking plate (203) is tightly attached with a cable anti-coming-off clamp plate (206).

2. A photovoltaic junction box according to claim 1, characterized in that: The outer diameter of the cable anti-coming-off clamp plate (206) is greater than the inner diameter of the U-shaped cable clamp (205), and the cable anti-coming-off clamp plate (206) is symmetrically arranged on the vertical central axis of the U-shaped cable clamp (205) and has two parts, the glue blocking plate (203) and the photovoltaic junction box body (1) form a clamping structure, the top surface of the glue blocking plate (203) is in the same horizontal line as the top surface of the photovoltaic junction box body (1), and the outer wall of the glue blocking plate (203) is in the same vertical plane as the outer wall of the photovoltaic junction box body (1).

3. A photovoltaic junction box according to claim 1, characterized in that: The photovoltaic junction box sealing assembly (3) comprises a photovoltaic junction box sealing cover (301), the bottom of the photovoltaic junction box sealing cover (301) is fixedly connected with a photovoltaic junction box sealing rubber ring (302), the end of the photovoltaic junction box sealing cover (301) is threadedly connected with a dismounting bolt (303), the top end of the dismounting bolt (303) is embedded with a threaded hole sealing rubber gasket (304), the outside of the dismounting bolt (303) is threadedly connected with a dismounting screw hole column (305), and the outside of the dismounting screw hole column (305) is fixedly connected with a box body reinforcing corner block (306).

4. A photovoltaic junction box according to claim 3, characterized in that: The photovoltaic junction box sealing cover (301) and the dismounting screw hole column (305) form a threadedly detachable structure through the dismounting bolt (303), and the photovoltaic junction box sealing cover (301) and the photovoltaic junction box body (1) form a sealing structure through the photovoltaic junction box sealing rubber ring (302), the cross section of the box body reinforcing corner block (306) is in the shape of a right-angled triangle, and the box body reinforcing corner block (306) is symmetrically arranged in two pairs about the vertical central axis of the photovoltaic junction box body (1).

5. A photovoltaic junction box according to claim 1, characterized in that: The photovoltaic junction box heat dissipation assembly (4) comprises a photovoltaic junction box terminal plate (401), the bottom of the photovoltaic junction box terminal plate (401) is tightly attached with a heat conductor (402), and the bottom of the heat conductor (402) is fixedly connected with a heat sink (403).

6. A photovoltaic junction box according to claim 5, characterized in that: The heat conductor (402) and the heat sink (403) form a communication structure, the heat sink (403) is arranged at equal intervals on the bottom of the heat conductor (402), and the heat conductor (402) and the heat sink (403) are filled with heat-conducting silicone grease.

7. A photovoltaic junction box according to claim 1, characterized in that: The material of the photovoltaic junction box body (1) and the photovoltaic junction box sealing cover (301) is BPT fireproof plastic material, and the outer walls of the photovoltaic junction box body (1) and the photovoltaic junction box sealing cover (301) are coated with protective paint, and the material of the protective paint is ceramic nano paint.

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