CN211959161U

CN211959161U - Photovoltaic junction box

Info

Publication number: CN211959161U
Application number: CN202020899710.3U
Authority: CN
Inventors: 王旭伟; 谢永浩; 江珊
Original assignee: Guangdong Voguang New Energy Technology Co ltd
Current assignee: Guangdong Voguang New Energy Technology Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2020-11-17
Anticipated expiration: 2030-05-25

Abstract

The utility model discloses a photovoltaic junction box, which comprises a junction box body and two cable accommodating devices arranged in the junction box body, wherein cables are wound in the cable accommodating devices, and the junction box body is provided with two first wire outlets for winding and unwinding the cables; the cable accessible cable storage device realizes flexible, has improved maintainer's work efficiency, and the cable can be accomodate the cable storage device when idle in, avoids the cable to expose for a long time and causes the damage and cause the winding problem of cable outside, has improved the security of terminal box and the life of cable to cable storage device accessible self-locking switch restriction cable is pulled out and is retrieved the adjustable length that realizes the cable, and the maintainer of being convenient for uses the operation.

Description

Photovoltaic junction box

Technical Field

The utility model relates to a photovoltaic module technical field, in particular to photovoltaic terminal box.

Background

The photovoltaic junction box is a connecting device between a solar cell array formed by solar cell modules and a solar charging control device, and mainly used for connecting electric power generated by solar cells with an external circuit. The current photovoltaic terminal box is in order to facilitate the connection between the subassembly, and its exposure line that sets up can be longer, sets up longer exposure line and though can conveniently connect, then can have certain potential safety hazard when not connecting, because exposure line is not fixed, if personnel contact the interface of exposure line carelessly, can take place the electric shock accident very easily to exposed cable still can take place winding and damaged problem easily, is unfavorable for the later maintenance.

It is seen that improvements and enhancements to the prior art are needed.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing prior art's weak point, an object of the utility model is to provide a photovoltaic terminal box aims at solving the technical problem that exposes cable overlength among the prior art and is not convenient for accomodate, is not convenient for later maintenance and has certain potential safety hazard.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the photovoltaic junction box comprises a junction box body and two cable storage devices installed in the junction box body, wherein cables are wound in the cable storage devices, and the junction box body is provided with two first wire outlets for winding and unwinding the cables.

In the photovoltaic junction box, the cable storage device comprises a storage shell, a winding rotating shaft and a clockwork spring, the clockwork spring is arranged in the winding rotating shaft, the winding rotating shaft is arranged in a cavity of the storage shell, and the winding rotating shaft is connected with the storage shell through the clockwork spring; the winding rotating shaft is wound with a cable, and one end of the cable is connected with the winding rotating shaft.

In the photovoltaic junction box, a spring positioning column is arranged in the center of the bottom of a cavity of the containing shell, and a second wire outlet for winding and unwinding a cable is arranged on the peripheral wall of a shell of the containing shell; the spring positioning column penetrates through the center of the clockwork spring, one end of the clockwork spring is connected with the spring positioning column, the other end of the clockwork spring is connected with the winding rotating shaft, and the other end of the cable sequentially penetrates through the second wire outlet and the first wire outlet.

In the photovoltaic junction box, the bottom of a cavity of the accommodating shell is provided with an electric brush groove, the upper end and the lower end of the winding rotating shaft are respectively provided with a clamping plate, a plurality of clamping point grooves are distributed on the peripheral wall of the clamping plate in an annular mode, the two clamping point grooves on the clamping plates correspond to each other up and down, an electric brush which is installed in a matched mode with the electric brush groove is formed in one end of the winding rotating shaft on the clamping plate, and the electric brush is electrically connected with the electric brush groove.

In the photovoltaic junction box, a self-locking switch matched with the clamping point groove is further arranged on the circumferential wall of the shell of the containing shell, and when the self-locking switch is in a locking state, the self-locking switch is clamped with the clamping point groove.

In the photovoltaic junction box, one side of the junction box body is provided with two wiring terminals, and a bypass diode is connected in parallel between the two wiring terminals.

In the photovoltaic junction box, the bottom of the storage shell is provided with an electrode interface in a molding mode, the electrode interface and the electric brush groove are of an integral structure, and the electrode interface is electrically connected with one wiring terminal respectively.

In the photovoltaic junction box, the cable is a ribbon cable.

Has the advantages that:

the utility model provides a photovoltaic terminal box, cable accessible cable storage device realizes flexible, has improved maintainer's work efficiency, and the cable can be accomodate cable storage device when idle in, avoids the cable to expose for a long time and causes the damage and cause the winding problem of cable outside causing, has improved the security of terminal box and the life of cable to cable storage device accessible self-locking switch limits the cable to pull out and retrieves the adjustable length that realizes the cable, and the maintainer of being convenient for uses the operation.

Drawings

Fig. 1 is the utility model provides an overall structure schematic diagram of photovoltaic terminal box.

Fig. 2 is the utility model provides an overall structure schematic diagram two of photovoltaic terminal box.

Fig. 3 is the internal structure schematic diagram of the junction box body in the photovoltaic junction box provided by the present invention.

Fig. 4 is a schematic structural diagram of the winding shaft in the photovoltaic junction box according to the present invention.

Fig. 5 is a schematic structural diagram of the winding shaft in the photovoltaic junction box according to the present invention.

Fig. 6 is a first schematic structural diagram of the storage case in the photovoltaic junction box provided by the present invention.

Fig. 7 is a schematic structural diagram ii of the accommodating case in the photovoltaic junction box provided by the present invention.

Description of the main element symbols: the cable-free terminal box comprises a terminal box body 1, a cable storage device 2, a cable 3, a self-locking switch 4, a first wire outlet 11, a wire connecting terminal 12, a bypass diode 13, a storage shell 21, a winding rotating shaft 22, a spring 23, a brush groove 211, a spring positioning column 212, a second wire outlet 213, an electrode interface 214, a clamping plate 221, a clamping point groove 222 and a brush 223.

Detailed Description

The utility model provides a photovoltaic terminal box, for making the utility model discloses a purpose, technical scheme and effect are clearer, make clear and definite, and it is right that the following refers to the attached drawing and the embodiment of lifting the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, it should be understood that the terms "middle part", "inside", "outside", etc. indicate the position or positional relationship of the present invention based on the drawings, and are only for convenience of description and simplified description. Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

Referring to fig. 1 to 3, the utility model provides a photovoltaic junction box, including junction box body 1 and installing two cable storage devices 2 in junction box body 1, around being equipped with cable 3 among the cable storage device 2, junction box body 1 is provided with two first outlets 11 that are used for receiving and releasing cable 3.

As shown in fig. 1 to 3, when the solar photovoltaic module is used, the electrodes of the solar photovoltaic module are connected to the connecting terminal 12, the cable 3 is pulled, the cable 3 is extended and retracted through the cable accommodating device 2, the self-locking switch 4 is pressed after the cable 3 is stretched to a required length, the self-locking switch 4 is in a locking state to limit the rotation of the cable accommodating device 2, so that the cable 3 is kept in a pulled-out state, then the cable 3 is connected with an external circuit, after the use, the self-locking switch 4 can be pressed again to enable the self-locking switch 4 to be in a loosening state, so that the cable accommodating device 2 automatically retracts, the exposed cable 3 retracts into the cable accommodating device 2, when most of the exposed cable 3 retracts into the cable accommodating device 2, the self-locking switch 4 needs to be pressed again to enable the self-locking switch 4 to be in a locking state, and a stub cable 3 is kept in an exposed state, so as to ensure that the user can directly pull out the cable 3 for use when using the cable next time; the cable 3 is drawn and collected to adjust the length, so that the working efficiency of users is improved, the cable 3 can be collected into the cable collecting device 2 when the cable 3 is idle, the problems that the cable 3 is damaged and wound due to long-term exposure outside are avoided, the safety of the junction box is improved, and the service life of the cable 3 is prolonged; the self-locking switch is a switch with a mechanical locking function, when the switch is pressed down, the button cannot rebound after the hand is loosened, the switch is in a locking state, and the switch can be unlocked to complete rebound after being pressed again.

Further, as shown in fig. 3, the cable housing device 2 includes a housing case 21, a winding shaft 22, and a clockwork spring 23, the clockwork spring 23 being disposed in the winding shaft 22, the winding shaft 22 being disposed in a cavity of the housing case 21, the winding shaft 22 being connected to the housing case 21 through the clockwork spring 23; the winding rotating shaft 22 is wound with a cable 3, and one end of the cable 3 is connected with the winding rotating shaft 22.

As shown in fig. 6, a spring positioning column 212 is disposed at the center of the bottom of the cavity of the receiving housing 21, and a second outlet 213 for receiving and releasing the cable 3 is disposed on the peripheral wall of the housing of the receiving housing 21; the spring positioning column 212 penetrates through the center of the clockwork spring 23, one end of the clockwork spring 23 is connected with the spring positioning column 212, the other end of the clockwork spring 23 is connected with the winding rotating shaft 22, and the other end of the cable 3 sequentially penetrates through the second wire outlet 213 and the first wire outlet 11; when the cable 3 retracts automatically, the clockwork spring 23 provides retracting power, the spring positioning column 212 positions the clockwork spring 23, the clockwork spring 23 is prevented from moving when in use, one end of the clockwork spring 23 drives the winding rotating shaft 22 to rotate, the winding rotating shaft 22 drives the cable 3 to rotate and retract, and the cable 3 retracts into the cable accommodating device 2.

As shown in fig. 4 to 6, a brush groove 211 is formed in the bottom of the cavity of the receiving housing 21, clamping plates 221 are respectively disposed at the upper and lower ends of the winding shaft 22, a plurality of clamping point grooves 222 are annularly distributed on the circumferential wall of the clamping plate 221, the clamping point grooves 222 on the two clamping plates 221 vertically correspond to each other, a brush 223 installed in cooperation with the brush groove 211 is formed on one end of the clamping plate 221 of the winding shaft 22, and the brush 223 is electrically connected to the brush groove 211.

Further, a self-locking switch 4 matched with the clamping point groove 222 is further arranged on the peripheral wall of the housing of the accommodating shell 21, and when the self-locking switch 4 is in a locking state, the self-locking switch is clamped with the clamping point groove 222; when the cable 3 is pulled out for a certain length, the self-locking switch 4 can be pressed to extend the fixture block inside (namely, locking state), the fixture block simultaneously clamps the fixture point grooves 222 at the upper and lower ends of the winding rotary shaft 22 to limit the winding rotary shaft 22 to retract and rotate, so that the cable 3 is kept in the pulled-out state, and after the cable 3 is used, the self-locking switch 4 can be pressed again to make the clamping block retract into the switch (i.e. the releasing state), at this time, the winding rotating shaft 22 retracts along with the clockwork spring 23 due to no limitation of the clamping block, so that the cable 3 retracts into the cable storage device 2, after most of the exposed cables 3 are retracted into the cable storage device 2, the self-locking switch 4 needs to be pressed again, so that the fixture blocks inside the self-locking switch 4 extend out again (namely, in a locking state), the fixture blocks simultaneously clamp the fixture point grooves 222 at the upper end and the lower end of the winding rotating shaft 22, the retraction of the cables 3 is limited, and a small section of the cable 3 is kept in an exposed state.

As shown in fig. 2, further, two connection terminals 12 are disposed on one side of the terminal box body 1, and a bypass diode 13 is connected in parallel between the two connection terminals 12; the two wiring terminals 12 are divided into a positive wiring terminal and a negative wiring terminal, and the bypass diode 13 can prevent the silicon battery plate from being burnt due to a hot spot effect;

as shown in fig. 7, an electrode interface 214 is formed at the bottom of the housing case 21, the electrode interface 214 and the brush slot 211 are integrated, and the electrode interface 214 is electrically connected to one of the terminals 12.

Further, the conducting mode when this application is used is as follows, solar photovoltaic cell module's electrode is connected on binding post 12, and cell module's electric current flows in from binding post 12, and binding post 12 conducts the electric current for electrode interface 214, and electrode interface 214 passes through brush groove 211 and conducts the electric current for brush 223, and brush 223 conducts the electric current for cable 3 through wire winding pivot 22, and finally cable 3 conducts the electric current again in external equipment.

Further, the cable 3 is a ribbon cable 3; the cable 3 is divided into a positive cable and a negative cable, the positive cable and the negative cable are respectively wound in different cable storage devices 2, the ribbon cable 3 has high winding resistance, and the storage effect of the cable 3 can be effectively improved.

To sum up, 3 accessible cable storage device 2 of cable realize flexible, have improved maintainer's work efficiency, in cable 3 can be accomodate cable storage device 2 when idle, avoid cable 3 to expose for a long time and cause the damage and cause the winding problem of cable 3 outside, improved the security of terminal box and the life of cable 3 to 2 accessible self-locking switch 4 of cable storage device restrict that cable 3 pulls out and retrieve the adjustable length that realizes cable 3, the maintainer of being convenient for uses the operation.

It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.

Claims

1. The photovoltaic junction box is characterized by comprising a junction box body and two cable storage devices installed in the junction box body, wherein cables are wound in the cable storage devices, and the junction box body is provided with two first wire outlets for winding and unwinding the cables.

2. The photovoltaic junction box of claim 1, wherein the cable storage device comprises a storage housing, a winding shaft and a clockwork spring, the clockwork spring is disposed in the winding shaft, the winding shaft is disposed in a cavity of the storage housing, and the winding shaft is connected with the storage housing through the clockwork spring; the winding rotating shaft is wound with a cable, and one end of the cable is connected with the winding rotating shaft.

3. The photovoltaic junction box of claim 2, wherein a spring positioning post is disposed at the center of the bottom of the cavity of the receiving housing, and a second outlet for taking up and releasing a cable is disposed on the peripheral wall of the housing of the receiving housing; the spring positioning column is inserted in the center of the clockwork spring, one end of the clockwork spring is connected with the spring positioning column, the other end of the clockwork spring is connected with the winding rotating shaft, and the other end of the cable sequentially penetrates through the second wire outlet and the first wire outlet.

4. The photovoltaic junction box of claim 3, wherein a brush groove is formed in the bottom of the cavity of the receiving housing, snap-in plates are respectively disposed at the upper end and the lower end of the winding shaft, a plurality of snap-in grooves are annularly distributed on the peripheral wall of the snap-in plates, the snap-in grooves on the two snap-in plates correspond to each other up and down, a brush is formed on the snap-in plate at one end of the winding shaft and is matched with the brush groove, and the brush is electrically connected with the brush groove.

5. The photovoltaic junction box of claim 4, wherein a self-locking switch is further disposed on a peripheral wall of the housing of the receiving casing, the self-locking switch is engaged with the clamping point groove when the self-locking switch is in a locked state.

6. The photovoltaic junction box of claim 4, wherein two terminals are disposed on one side of the junction box body, and a bypass diode is connected in parallel between the two terminals.

7. The photovoltaic junction box of claim 6, wherein an electrode interface is formed at a bottom of the housing, the electrode interface and the brush slot are integrally formed, and the electrode interface is electrically connected to one of the terminals respectively.

8. The photovoltaic junction box of claim 1, wherein the cable is a ribbon cable.