CN118137215B - Photovoltaic module cable connecting device - Google Patents

Abstract

The application discloses a photovoltaic module cable connecting device, which comprises an electric connection box body, wherein the top of the electric connection box body is covered with a protective cover, and an orientation guide mechanism is fixedly arranged in the protective cover; when the photovoltaic cable is installed, the directional guide mechanism can be adjusted and fixed according to the direction of the photovoltaic cable; the conventional photovoltaic cable has the problems that serious twisting and bending are now caused when the conventional photovoltaic cable is connected with the electrical connection box body 1, and then the cable sheath is easily worn, the directional guide mechanism can be adjusted according to the direction of the photovoltaic cable, so that the directional guide mechanism is suitable for the photovoltaic cable, and can be fixed after the adjustment is finished, and the friction damage of the photovoltaic cable is effectively avoided.

Description

Photovoltaic module cable connection device

Technical Field

The present application relates to the field of photovoltaic technology, and in particular to a photovoltaic module cable connection device.

Background Art

Photovoltaic panels are a type of power generation device that generates direct current when exposed to sunlight. They are composed of thin solid photovoltaic cells made almost entirely of semiconductor materials. Simple photovoltaic cells can provide energy for watches and computers, while more complex photovoltaic systems can provide lighting for houses and power the grid. Photovoltaic panels can be made into different shapes, and the components can be connected to generate more electricity. Photovoltaic panels are used on rooftops and building surfaces, and are even used as part of windows, skylights or shading devices. These photovoltaic facilities are usually called building-attached photovoltaic systems.

However, due to the different positions of cables in photovoltaic modules, they cannot all be aligned in the connection direction of the junction box, which causes some cables to be in a bent and twisted state for a long time after connection. When the cables are twisted, the outer skin may be locally squeezed and rubbed, causing outer skin wear. This wear may cause thinner parts, cracks or even damage to the outer skin, exposing the cable to the external environment, increasing the risk of damage to the cable insulation. At the same time, the insulation material of the cable may be subjected to pressure and friction due to twisting, causing damage or cracks to the insulation material. Damage to the insulation material will increase the risk of leakage of the cable, which may cause electrical failures or safety hazards. In addition, long-term twisting will cause the wires in the cable to be stretched and bent, which may cause metal fatigue and fracture inside the wires. This will affect the electrical conductivity of the cable and reduce the efficiency of the solar system.

Summary of the invention

The technical solution of the present invention to solve the above technical problems is as follows: a photovoltaic module cable connection device, comprising an electrical connection box, the top of the electrical connection box is covered with a protective cover, and a directional guide mechanism is fixedly installed inside the protective cover; during installation, the directional guide mechanism can be adjusted and fixed according to the direction of the photovoltaic cable;

In which, the directional guiding mechanism includes a connecting sleeve fixedly installed inside the protective cover, a sealing gasket is fixedly installed at the connection between the connecting sleeve and the protective cover, a positioning support plate is fixedly installed on the top of the sealing gasket, and a bent cable bundle is rotatably installed in the inner cavity of the connecting sleeve. In the initial state, the bent cable bundle can rotate freely, and a plurality of positioning pin holes are opened on the positioning support plate in a circular shape and equidistantly in sequence. The outer side of the bent cable bundle is located above the positioning support plate and is fixedly connected with a positioning pin matching the positioning pin hole. When the positioning pin is plugged into the positioning pin hole, the bent cable bundle is fixed.

Preferably, the bottom of the directional guide mechanism is rotatably connected to a limit adjustment mechanism fixedly connected to the electrical connection box; the limit adjustment mechanism includes a conductive component fixedly installed on the bottom of the electrical connection box, the top of the conductive component is fixedly connected to a primary limit insulating cylinder, and a locking assembly is provided between the primary limit insulating cylinder and the bent cable bundle cylinder.

Preferably, the locking assembly includes a secondary connecting limit sleeve rotatably installed on the upper outer side of the primary limiting insulating cylinder, the inner wall of the secondary connecting limit sleeve is provided with a hemispherical slot I, the outer wall of the bent cable bundle cylinder is provided with a hemispherical slot II, the inner cavity of the hemispherical slot II is fixedly installed with a first spring element arranged in a horizontal state, one end of the first spring element is fixedly connected with a spherical limit pad, the spherical limit pad is inserted into the inner cavity of the hemispherical slot I, and in the initial state, the first spring element pushes the spherical limit pad out of the hemispherical slot II.

Preferably, the inner circumferential diameter length of the secondary connection limiting sleeve is greater than the outer circumferential diameter length of the bent cable bundle barrel, and the top of the secondary connection limiting sleeve is arranged in an arc shape.

Preferably, the interior of the conductive component is arranged in a hollow state, and a plurality of guide rails are fixedly installed at the bottom of the primary limiting insulating cylinder, and a plurality of curved anti-skid pads are slidably installed inside the plurality of guide rails, a second spring element is fixedly installed between the plurality of curved anti-skid pads and the guide rails, and a third spring element is fixedly installed between the plurality of curved anti-skid pads and the primary limiting insulating cylinder.

Preferably, the plurality of curved anti-skid pads are arranged in a ring-shaped manner around the inner circumferential surface of the primary limiting insulating cylinder in a sequentially equidistant state, and a curved cable groove is provided on the side where the plurality of curved anti-skid pads are close to each other.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the existing technical solutions, 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 recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

FIG1 is a schematic diagram of the overall structure of the present invention;

FIG2 is a side sectional view of the structure of the electrical connection box and the protective cover of the present invention;

FIG3 is a schematic structural diagram of a directional guide mechanism and a limit adjustment mechanism of the present invention;

FIG4 is a partial structural cross-sectional view of the directional guide mechanism and the limit adjustment mechanism of the present invention;

FIG5 is an enlarged structural view of section A of FIG4 of the present invention;

FIG6 is an enlarged structural view of part B of FIG4 of the present invention;

FIG. 7 is an enlarged view of the structure of section C of FIG. 4 of the present invention.

In the figure: 1. electrical connection box; 2. protective cover; 3. directional guide mechanism; 31. connecting sleeve; 32. sealing gasket; 33. positioning support plate; 34. bent cable bundle barrel; 35. positioning pin hole; 36. positioning pin bolt; 37. hemispherical slot II; 38. first spring element; 39. spherical limit liner; 310. annular partition gasket; 311. gas conduction flow tube; 312. closed adjustment bag; 313. spherical gas storage bag; 314. external threaded pipe joint; 315. internal threaded connecting sleeve; 316. arc-shaped pressure block; 4. limit adjustment mechanism; 41. conductive component; 42. primary limit insulating cylinder; 43. secondary connection limit sleeve; 44. guide rail; 45. curved anti-skid liner; 46. second spring element; 47. third spring element; 48. curved cable trough.

DETAILED DESCRIPTION

The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

Please refer to Figures 1-7. As shown in the figures, a photovoltaic module cable connection device provided in this embodiment, as shown in Figure 1, includes an electrical connection box 1, and the top of the electrical connection box 1 is covered with a protective cover 2;

As shown in FIG. 2 , a directional guide mechanism 3 is fixedly installed inside the protective cover 2 ; during installation, the directional guide mechanism 3 can be adjusted and fixed according to the direction of the photovoltaic cable.

Specifically, traditional photovoltaic cables are severely twisted and bent when connected to the electrical connection box 1, which leads to the problem of easy wear of the cable sheath. The directional guide mechanism 3 of the present application can be adjusted according to the direction of the photovoltaic cable, so that the directional guide mechanism 3 adapts to the photovoltaic cable, and can be fixed after the adjustment is completed, effectively avoiding friction damage to the photovoltaic cable.

It should be noted that this embodiment does not limit the directional guide mechanism 3. No matter what structure and connection method are used, as long as the directional guide mechanism 3 can be adjusted and fixed according to the direction of the photovoltaic cable during installation, it should be within the protection scope of the present invention. Of course, a specific directional guide mechanism 3 can be designed, as shown below:

As shown in Figures 3-4, the directional guiding mechanism 3 includes a connecting sleeve 31 fixedly installed inside the protective cover 2, a sealing gasket 32 is fixedly installed at the connection between the connecting sleeve 31 and the protective cover 2, a positioning support plate 33 is fixedly installed on the top of the sealing gasket 32, and a bending cable bundle barrel 34 is rotatably installed in the inner cavity of the connecting sleeve 31. In the initial state, the bending cable bundle barrel 34 can rotate freely, and a plurality of positioning pin holes 35 are opened in a circular shape and equidistantly in sequence on the positioning support plate 33. The outer side of the bending cable bundle barrel 34 is located above the positioning support plate 33 and is fixedly connected with a positioning pin 36 matching the positioning pin hole 35. When the positioning pin 36 is plugged into the positioning pin hole 35, the bending cable bundle barrel 34 is fixed.

In actual use, the cables of the photovoltaic module pass through the bent cable bundle barrel 34 and extend into the interior of the electrical connection box 1 and are fixedly connected to the electrical connection box 1. According to the direction of the photovoltaic cable, the bent cable bundle barrel 34 can be rotated inside the connecting sleeve 31 so that the opening of the bent cable bundle barrel 34 faces the photovoltaic cable. Finally, the bent cable bundle barrel 34 is pressed downward so that the positioning pin 36 is inserted into the inner cavity of the positioning pin hole 35. The direction of the bent cable bundle barrel 34 can be adjusted and fixed, thereby avoiding the twisting and bending of traditional cables when connected to the electrical connection box 1, which in turn causes the cable sheath to be easily worn.

Furthermore, the bottom of the directional guide mechanism 3 is rotatably connected to a limit adjustment mechanism 4 fixedly connected to the electrical connection box 1; the limit adjustment mechanism 4 includes a conductive component 41 fixedly installed on the bottom of the electrical connection box 1, and the top of the conductive component 41 is fixedly connected to a primary limit insulating cylinder 42, and a locking component is provided between the primary limit insulating cylinder 42 and the bent cable bundle cylinder 34.

Specifically, the engaging clamping assembly is used to make the disassembly and assembly between the bent cable bundle cylinder 34 and the primary limiting insulating cylinder 42 more convenient and quick.

Of course, the snap-fit assembly can be specifically designed, as shown below:

Further, referring to Figures 4-5, the locking assembly includes a secondary connection limit sleeve 43 rotatably installed on the upper outer side of the primary limit insulating cylinder 42, and a hemispherical groove I is provided on the inner wall of the secondary connection limit sleeve 43, and a hemispherical groove II 37 is provided on the outer wall of the bent cable bundle cylinder 34. The inner cavity of the hemispherical groove II 37 is fixedly installed with a first spring element 38 arranged in a horizontal state, and one end of the first spring element 38 is fixedly connected to a spherical limit pad 39, and the spherical limit pad 39 is inserted into the inner cavity of the hemispherical groove I. In the initial state, the first spring element 38 pushes the spherical limit pad 39 out of the hemispherical groove II 37.

Specifically, the first spring element 38 is in an expanded state to push the spherical limit pad 39 out of the inner cavity of the hemispherical slot II 37. After the cable is passed through the inner cavity of the bent cable bundle barrel 34, when the bent cable bundle barrel 34 is connected to the secondary connection limit sleeve 43, the bent cable bundle barrel 34 is pressed downward so that the bent cable bundle barrel 34 can be inserted into the interior of the secondary connection limit sleeve 43 for quick connection and installation.

Furthermore, the number of the hemispherical slots I and II 37 is set to be multiple, and the multiple hemispherical slots I and II 37 are arranged in a ring-shaped and equidistant state around the outer circumferential surface of the bending cable bundle barrel 34. At the same time, the inner circumferential diameter length of the secondary connection limit sleeve 43 is greater than the outer circumferential diameter length of the bending cable bundle barrel 34, and the top of the secondary connection limit sleeve 43 is arranged in an arc shape.

Specifically, the purpose of such a configuration is that when the bending cable bundle barrel 34 is pressed downward as a whole so that the spherical limit pad 39 comes into contact with the bending cable bundle barrel 34, the spherical limit pad 39 can be guided and slide down along the arc-shaped side of the bending cable bundle barrel 34, so that the spherical limit pad 39 can be smoothly engaged into the interior of the hemispherical slot Ⅰ, thereby completing the limiting connection work between the bending cable bundle barrel 34 and the secondary connecting limit sleeve 43.

Further, referring to Figures 4 and 6, the interior of the conductive component 41 is arranged in a hollow state, and a plurality of guide rails 44 are fixedly installed at the bottom of the primary limiting insulating cylinder 42, and a plurality of curved anti-skid pads 45 are slidably installed inside the plurality of guide rails 44, a second spring element 46 is fixedly installed between the plurality of curved anti-skid pads 45 and the guide rails 44, and a third spring element 47 is fixedly installed between the plurality of curved anti-skid pads 45 and the primary limiting insulating cylinder 42.

Specifically, under normal conditions, the second spring element 46 and the third spring element 47 are both in an expanded state to lift the curved anti-slip pad 45 closer to each other. When the photovoltaic cable is fixedly connected to the conductive component 41, depending on the thickness of the cable, when the cable passes through multiple curved anti-slip pads 45, a resistance force can be generated on the curved anti-slip pad 45, thereby pushing the curved anti-slip pad 45 to slide toward the inner wall of the primary limiting insulating cylinder 42, and causing the second spring element 46 and the third spring element 47 to contract. After the cable is stably connected, the elastic restoring force of the second spring element 46 and the third spring element 47 allows the cable to be stably limited between the multiple curved anti-slip pads 45, thereby avoiding the problem of the cable being loosened and falling off due to the influence of external force shaking the cable.

Furthermore, at the same time, the plurality of curved anti-skid pads 45 are arranged in a ring-shaped manner around the inner circumferential surface of the primary limiting insulating cylinder 42 in an equidistant state, and a curved cable groove 48 is opened on the side where the plurality of curved anti-skid pads 45 are close to each other.

Specifically, the purpose of such a configuration is that when the cable passes through multiple curved anti-slip pads 45 and the multiple curved anti-slip pads 45 are limited and pressed, the cable can be engaged in the inner cavity of the curved cable groove 48 for auxiliary limitation, thereby keeping the cable in stable contact with the curved anti-slip pads 45, so that the multiple curved anti-slip pads 45 can be surrounded by the outer periphery of the cable for protection.

Further preferably, a sealing assembly is fixedly installed on one end of the bent cable bundle barrel 34 extending out of the top of the protective cover 2. Specifically, the sealing assembly is used to keep the connection between the cable and the bent cable bundle barrel 34 in a sealed state, thereby preventing outdoor wind and sand and dust from entering the inner cavity of the electrical connection box 1 through the gap between the bent cable bundle barrel 34 and the cable, thereby affecting the normal use of the internal components of the electrical connection box 1.

Of course, the sealing components can be specifically designed as follows:

Further, as shown in Figures 4 and 7, the sealing assembly includes an annular partition gasket 310 fixedly installed on the end of the bent cable bundle tube 34 away from the connecting sleeve 31, and a plurality of gas flow tubes 311 are fixedly installed inside the annular partition gasket 310. One end of the plurality of gas flow tubes 311 extending into the interior of the annular partition gasket 310 is connected to a closed regulating bag 312, and one end of the plurality of gas flow tubes 311 away from the closed regulating bag 312 is connected to a spherical air storage bag 313. In the initial state, the closed regulating bag 312 is in a deflated state, and the spherical air storage bag 313 is in an expanded state.

Specifically, after the photovoltaic cable passes through the interior of the bent cable bundle 34, the sealed adjustment bag 312 is expanded to cover the outer wall of the cable, so that the cable and the bent cable bundle 34 remain sealed and prevent external dust from entering.

At the same time, the outer wall of the bent cable bundle tube 34 is fixedly installed with an external threaded pipe joint 314 perpendicular to the annular partition gasket 310, and the outer wall of the external threaded pipe joint 314 is threadedly connected with an internal threaded connecting sleeve 315, and the internal threaded connecting sleeve 315 is fixedly installed with an arc-shaped pressure block 316 on one side close to the spherical air storage bag 313.

Specifically, by rotating the internal threaded connecting sleeve 315, it can be translated on the outer wall of the external threaded pipe joint 314, and then gradually contact the spherical air storage bag 313, and press the gas in the inner cavity of the spherical air storage bag 313 to enter the inner cavity of the closed regulating bag 312 through the gas conducting flow tube 311 to expand it, so that it can be used for sealing and limiting cables of different thicknesses.

It can be understood that, in the specific implementation, the photovoltaic cable integrated with the photovoltaic component is first passed through the inner cavity of the bent cable bundle barrel 34, so that one end of the cable passing through the inner cavity of the electrical connection box 1 is inserted into the inner cavity of the primary limiting insulating cylinder 42 and electrically connected to the conductive component 41, and then the protective cover 2 is covered on the top of the electrical connection box 1, and then the bent cable bundle barrel 34 is rotated so that the outlet of the bent cable bundle barrel 34 faces the direction of the cable, and then the bent cable bundle barrel 34 is pressed downward so that the positioning pin 36 is inserted into the inner cavity of the positioning pin hole 35 to complete the cable direction fixing work, at the same time, the bent cable bundle barrel 34 pressed downward contacts the secondary connection limit sleeve 43, and the spherical limit pad 39 is engaged with the hemispherical slot I, and the connection work between the bent cable bundle barrel 34 and the secondary connection limit sleeve 43 is completed to complete the wiring work of the photovoltaic component.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A photovoltaic module cable connection device, comprising an electrical connection box (1), characterized in that: The top of the electrical connection box (1) is covered with a protective cover (2), and a directional guide mechanism (3) is fixedly installed inside the protective cover (2); during installation, the directional guide mechanism (3) can be adjusted and fixed according to the direction of the photovoltaic cable; The directional guide mechanism (3) comprises a connecting sleeve (31) fixedly mounted inside the protective cover (2); a sealing gasket (32) is fixedly mounted at the connection between the connecting sleeve (31) and the protective cover (2); a positioning support plate (33) is fixedly mounted on the top of the sealing gasket (32); a bending cable bundle barrel (34) is rotatably mounted in the inner cavity of the connecting sleeve (31); in an initial state, the bending cable bundle barrel (34) can rotate freely; a plurality of positioning pin holes (35) are provided on the positioning support plate (33) in a circular shape and equidistantly in sequence; a positioning pin (36) matching the positioning pin hole (35) is fixedly connected to the outer side of the bending cable bundle barrel (34) above the positioning support plate (33); when the positioning pin (36) is plugged into the positioning pin hole (35), the bending cable bundle barrel (34) is fixed. 2. The photovoltaic module cable connection device according to claim 1, characterized in that: The bottom of the directional guide mechanism (3) is rotatably connected to a limit adjustment mechanism (4) fixedly connected to the electrical connection box (1); The limit adjustment mechanism (4) comprises a conductive component (41) fixedly mounted on the bottom of the electrical connection box (1), a primary limit insulating cylinder (42) being fixedly connected to the top of the conductive component (41), and a snap-fit component being provided between the primary limit insulating cylinder (42) and the bent cable bundle cylinder (34). 3. The photovoltaic module cable connection device according to claim 2, characterized in that: The locking assembly includes a secondary connection limit sleeve (43) rotatably mounted on the upper outer side of the primary limit insulating cylinder (42), a hemispherical groove I is provided on the inner wall of the secondary connection limit sleeve (43), a hemispherical groove II (37) is provided on the outer wall of the bent cable bundle cylinder (34), a first spring element (38) arranged in a horizontal state is fixedly installed in the inner cavity of the hemispherical groove II (37), one end of the first spring element (38) is fixedly connected to a spherical limit liner (39), the spherical limit liner (39) is inserted into the inner cavity of the hemispherical groove I, and in the initial state, the first spring element (38) pushes the spherical limit liner (39) out of the hemispherical groove II (37). 4. The photovoltaic module cable connection device according to claim 3, characterized in that: The inner diameter length of the secondary connection limiting sleeve (43) is greater than the outer diameter length of the bent cable bundle barrel (34), and the top of the secondary connection limiting sleeve (43) is arranged in an arc shape. 5. The photovoltaic module cable connection device according to claim 3, characterized in that: The interior of the conductive component (41) is arranged in a hollow state, and a plurality of guide rails (44) are fixedly installed at the bottom of the primary limit insulating cylinder (42), and a plurality of curved anti-skid pads (45) are slidably installed inside the plurality of guide rails (44), a second spring element (46) is fixedly installed between the plurality of curved anti-skid pads (45) and the guide rails (44), and a third spring element (47) is fixedly installed between the plurality of curved anti-skid pads (45) and the primary limit insulating cylinder (42). 6. The photovoltaic module cable connection device according to claim 5, characterized in that: The plurality of curved anti-skid pads (45) are arranged in a circular shape and equidistantly in sequence around the inner circumferential surface of the primary limiting insulating cylinder (42), and a curved cable groove (48) is provided on one side of the plurality of curved anti-skid pads (45) close to each other.