CN219678410U - Photovoltaic junction box - Google Patents

Abstract

The utility model relates to a photovoltaic junction box which comprises a box body, a plugging cover, a box cover and a sealing piece, wherein the box body is provided with a junction cavity and an opening communicated with the junction cavity; the plugging cover is arranged at the opening to close the opening; the box cover is detachably connected with the box body and covers the outside of the box body; the sealing piece is arranged between the box cover and the box body in a sealing way, and the sealing piece is arranged around the outer edge of the opening. According to the photovoltaic junction box, the protective cover type box cover is arranged, so that the protective performance and the waterproof performance of the photovoltaic junction box are greatly improved, the box cover is convenient to assemble, maintain and replace, and the photovoltaic junction box is ensured to work normally for a long time; through setting up the sealing member, guarantee the holistic waterproof sealing performance of photovoltaic terminal box, shutoff lid, lid and sealing member constitute sealed and protective structure many times, and the photovoltaic terminal box has better security, leakproofness, waterproof nature and long-term reliability, and the photovoltaic terminal box can handle various extreme environment.

Description

Photovoltaic junction box

Technical Field

The utility model relates to the technical field of junction boxes, in particular to a photovoltaic junction box.

Background

With the development of photovoltaic technology, photovoltaic junction boxes are increasingly used. The photovoltaic junction box is a key part of the photovoltaic module and is responsible for transmitting the current generated by the photovoltaic module battery outwards. The photovoltaic junction box is generally positioned on the back of the photovoltaic module, and a few photovoltaic junction boxes are positioned on the front of the photovoltaic module. One or more bypass diodes are usually arranged in the photovoltaic junction box, and the bypass diodes are used for avoiding the loss of power generation efficiency and the safety risk of the photovoltaic module when the hot spot effect occurs to the photovoltaic module. Because photovoltaic modules and photovoltaic junction boxes are typically installed outdoors, the photovoltaic junction boxes need to be guaranteed to function properly for long periods of time in various outdoor environments.

In the related art, the photovoltaic junction box is designed for coping with a ground power station and a roof distributed photovoltaic module, and is generally composed of a box body, a box cover, pouring sealant and a bypass diode, wherein the box body and the box cover which are made of high polymer materials are used for protecting the outside, and the pouring sealant is used for sealing the inside.

However, the photovoltaic junction box has the advantages that only the box body and the box cover play a role in protection, the pouring sealant plays a role in sealing, the long-term waterproof performance is poor, and the risk of waterproof failure and water inlet of the electric connector is high for areas with more moisture and precipitation in weather and on-water and off-shore photovoltaic scenes; in some extreme environments, such as long-term high temperature, long-term low temperature, a large amount of wind sand in desert areas and the like, the box body and the box cover of the photovoltaic junction box can be cracked and failed.

Disclosure of Invention

Based on the above, it is necessary to provide a photovoltaic junction box which has poor long-term waterproof performance and can cause the problems of cracking and failure of the box body and the box cover of the photovoltaic junction box, larger waterproof failure and water inlet risk of the electric connector in some extreme environments.

A photovoltaic junction box, the photovoltaic junction box comprising:

the box body is provided with a wiring cavity and an opening communicated with the wiring cavity;

the plugging cover is arranged at the opening to close the opening;

the box cover is detachably connected with the box body and covers the outside of the box body; and

the sealing piece is arranged between the box cover and the box body in a sealing way, and the sealing piece surrounds the outer edge of the opening.

In one embodiment, the box cover is slidably connected to the box body along a longitudinal direction of the box body, so that the box cover can move to a termination position covered on the box body or to a separation position separated from the box body along the longitudinal direction of the box body.

In one embodiment, the box body is provided with guide parts positioned at two opposite sides of the opening, and the guide parts extend along the longitudinal direction of the box body; the box cover is correspondingly provided with a sliding part which can be matched with the guide part in a sliding way.

In one embodiment, the box body is further provided with a first matching part, the box cover is correspondingly provided with a first clamping part, and the first clamping part can be clamped with the first matching part in the longitudinal direction of the box body so as to lock the box cover and the box body to move relatively in the longitudinal direction of the box body at the termination position.

In one embodiment, the first matching part is arranged on the guiding part, and the first clamping part is arranged on two sides of the box cover corresponding to the guiding part; or, the first matching part is arranged at one longitudinal end of the box body, and the first clamping part is correspondingly arranged at one longitudinal end of the box cover.

In one embodiment, the box body is further provided with a second matching part, and the box cover is correspondingly provided with a second clamping part; the wiring cavity is provided with a first wall which is arranged opposite to the opening; the second matching part can be clamped with the second clamping part in the direction that the first wall points to the opening, so that the relative movement of the box cover and the box body along the direction that the first wall points to the opening is locked at the end position.

In one embodiment, a connecting part is convexly arranged on the peripheral wall of the box body, and the connecting part is arranged around the outer edge of the opening; the box cover is provided with a cover opening, the cover opening is connected with the connecting part, and the sealing element is clamped between the cover opening and the connecting part.

In one embodiment, the inner wall of the cover opening is overlapped with the outer peripheral wall of the connecting part; the connecting part is characterized in that a groove is formed in the peripheral wall of the connecting part, the groove extends along the extending direction of the connecting part, the sealing element is embedded in the groove, and the sealing element is elastically abutted to the inner wall of the cover opening.

In one embodiment, the connecting portion is disposed on a side of the outer peripheral wall of the case away from the opening.

In one embodiment, the blocking cover is embedded in the opening.

According to the photovoltaic junction box, the protective cover type box cover is arranged, so that the protective performance and the waterproof performance of the photovoltaic junction box are greatly improved, the box cover is convenient to assemble and disassemble, the assembly process of the photovoltaic junction box is simplified, the assembly, the maintenance and the replacement of the photovoltaic junction box are facilitated, the long-term normal operation of the photovoltaic junction box is ensured, and the long-term reliability is improved; by arranging the sealing piece, the assembly and maintenance of the photovoltaic junction box are convenient, the integral sealing waterproof performance of the photovoltaic junction box is ensured, and the long-term waterproof performance is improved; the plugging cover, the box cover and the sealing piece jointly form a plurality of sealing and protecting structures, so that the photovoltaic junction box has better safety, sealing performance, waterproofness and long-term reliability, and can cope with various extreme environments including areas with more humid and rainfall in climate, water and offshore photovoltaic scenes and the like, and the risks of waterproof failure and water inflow of the electric connector are effectively reduced.

Drawings

Fig. 1 is a schematic perspective view of a photovoltaic junction box according to an embodiment of the utility model.

Fig. 2 is an exploded view of a photovoltaic junction box according to an embodiment of the present utility model.

Fig. 3 is a schematic view illustrating an assembly process of a photovoltaic junction box according to an embodiment of the present utility model.

Fig. 4 is a schematic view of an assembly structure of a box body, a plugging cover and a sealing member according to an embodiment of the utility model.

Fig. 5 is a schematic diagram of an assembly structure of a box body and a plugging cover according to an embodiment of the utility model.

Fig. 6 is a schematic structural view of a box cover according to an embodiment of the present utility model.

Reference numerals:

1. a case body; 11. an opening; 12. a joint portion; 13. a guide part; 131. a lead-in bevel edge; 14. a first mating portion; 15. a connection part; 16. a groove; 17. a bending part;

2. a blocking cover;

3. a box cover; 31. a sliding part; 32. a first engagement portion; 33. a cover opening;

4. a seal;

200. and (5) externally connecting a cable.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, the terms "mounted," "connected," "secured," and the like are to be construed broadly, unless otherwise specifically indicated and defined. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It is noted that an element is referred to as being "fixed" or "disposed" on another element, and may be directly on the other element or intervening elements may also be present. One element is considered to be "connected" to another element, which may be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

As shown in fig. 1 and 2, a photovoltaic junction box provided by an embodiment of the present utility model includes a box body 1, a plugging cover 2, a box cover 3 and a sealing member 4, where the box body 1 is provided with a junction cavity (not shown in the drawings) and an opening 11 communicating with the junction cavity; the plugging cover 2 is arranged at the opening 11 to close the opening 11; the box cover 3 is detachably connected with the box body 1 and covers the outside of the box body 1; the sealing element 4 is arranged between the box cover 3 and the box body 1 in a sealing way, and the sealing element 4 is arranged around the outer edge of the opening 11.

In the embodiment, a wiring cavity with an opening 11 at the top is formed in a box body 1 of the photovoltaic junction box, and electric connection elements such as an electric connector and a bypass diode are arranged in the wiring cavity so as to realize that the photovoltaic junction box transmits current generated by a photovoltaic module battery outwards; the blocking cover 2 is disposed at the opening 11 to block the opening 11, form a first seal and protection of the junction cavity, protect the electrical connection element and prevent external water from penetrating into the junction cavity to cause short circuit of the electrical connector. The box cover 3 covers the outside of the box body 1, wraps the plugging cover 2 and the opening 11, isolates the plugging cover 2 and the opening 11 from the external environment, forms the second protection of the wiring cavity, protects the plugging cover 2 and the box body 1, prevents the plugging cover 2 and the box body 1 from cracking and losing efficacy under some external extreme environments to cause the electric connector to enter water, and has better protection performance; in addition, the box cover 3 is detachably connected with the box body 1, so that the box cover 3 is convenient to detach to mount, maintain and replace the electric connection element in the junction line cavity, long-term normal operation of the photovoltaic junction box is guaranteed, the service life of the photovoltaic junction box is prolonged, and long-term reliability of the photovoltaic junction box is improved. Meanwhile, the sealing piece 4 is arranged between the box cover 3 and the box body 1 in a sealing manner and is used for sealing an installation gap between the box cover 3 and the box body 1, the sealing piece 4 surrounds the outer edge of the opening 11, specifically, the projection of the sealing piece 4 on the plane of the opening 11 surrounds the opening 11, so that the secondary sealing of the wiring cavity is formed, water seepage between the detachable box cover 3 and the box body 1 is prevented, the overall sealing waterproof performance of the photovoltaic junction box is ensured, and the risks of waterproof failure and water inlet of the electric connector are effectively reduced.

According to the photovoltaic junction box, the protective cover type box cover 3 is arranged, so that the protective performance and the waterproof performance of the photovoltaic junction box are greatly improved, the box cover 3 is convenient to assemble and disassemble, the assembly process of the photovoltaic junction box is simplified, the assembly, maintenance and replacement of the photovoltaic junction box are facilitated, the long-term normal operation of the photovoltaic junction box is ensured, and the long-term reliability is improved; by arranging the sealing piece 4, the assembly and maintenance of the photovoltaic junction box are convenient, the integral sealing waterproof performance of the photovoltaic junction box is ensured, and the long-term waterproof performance is improved; the shutoff lid 2, lid 3 and sealing member 4 constitute many times seal and protective structure jointly for the photovoltaic terminal box has better security, leakproofness, waterproof nature and long-term reliability, and the photovoltaic terminal box can handle various extreme environment, including the moist precipitation area of weather and on water, marine photovoltaic scene etc. effectively reduces waterproof inefficacy, the risk that electric connector intakes, solves the photovoltaic terminal box and long-term waterproof performance relatively poor, and can cause the box body, the lid fracture inefficacy of photovoltaic terminal box in some extreme environment, has great waterproof inefficacy, the problem of electric connector intaking risk.

In some embodiments, the wiring cavity can be further used for pouring sealant to realize waterproof sealing, so that the third sealing and protection of the wiring cavity are formed, the waterproof performance and the sealing performance are better, the electric connection elements are further protected, and external water is prevented from penetrating into the wiring cavity to cause short circuit of the electric connector.

In some embodiments, as shown in fig. 2, 4 and 5, the closure cap 2 is embedded within the opening 11. The plugging cover 2 is embedded in the opening 11, the plugging cover 2 is connected with the box body 1 more tightly, the plugging cover 2 is conveniently installed and fixed, the sealing protection effect of the butt joint line cavity is better, the electric connecting element is further protected, and external water is prevented from penetrating into the wiring cavity.

Optionally, a sealant for connecting and sealing is arranged between the plugging cover 2 and the box body 1, and the sealant plugs the installation gap between the plugging cover 2 and the opening 11.

In some embodiments, as shown in fig. 2 to 5, one end of the box 1 in the longitudinal direction is provided with a connection portion 12, and the connection portion 12 is used to pass through the external cable 200. The external cable 200 can be inserted into the box body 1 along the longitudinal direction of the box body 1 through the engagement portion 12 and electrically connected with the electrical connector in the wiring cavity.

Optionally, the joint 12 and the external cable 200 are sealed by sealant.

In some embodiments, as shown in fig. 2 and 3, the cover 3 is slidably connected to the case 1 along the longitudinal direction of the case 1, so that the cover 3 can be moved to a final position covered on the case 1 or to a separated position separated from the case 1 along the longitudinal direction of the case 1. Specifically, the cover 3 slides close to the engagement portion 12 in the longitudinal direction of the case 1 to connect the cover 3 with the case 1; the cover 3 slides away from the engagement portion 12 in the longitudinal direction of the case 1 to separate the cover 3 from the case 1.

In this embodiment, lid 3 can be dismantled with box body 1 through the slip mode and be connected, lid 3 easy dismounting can avoid producing the interference with the external cable 200 that the vertical one end of box body 1 is connected moreover, further makes things convenient for assembly, maintenance and the change of photovoltaic terminal box, guarantees the long-term normal work of photovoltaic terminal box.

In some embodiments, as shown in fig. 4 and 5, the case 1 is provided with guide portions 13 located at opposite sides of the opening 11, the guide portions 13 extending in the longitudinal direction of the case 1; as shown in fig. 2 and 6, the cover 3 is provided with a slide portion 31 slidably fitted to the guide portion 13.

In this embodiment, as shown in fig. 2 and 3, by setting the guiding portion 13 and the sliding portion 31, when the box cover 3 is installed, the sliding portion 31 is connected to the guiding portion 13, so as to push the box cover 3 to slide relative to the box body 1, and meanwhile, the sliding portion 31 is driven to slide along the guiding portion 13, so that a guiding and limiting effect can be achieved on the sliding of the box cover 3 relative to the box body 1, and the box cover 3 is more convenient to assemble and disassemble.

In some embodiments, the guiding portion 13 may be a sliding rail or a sliding groove, and the sliding portion 31 may be a sliding block, which is adapted to be slidably connected in the sliding rail or the sliding groove.

In some embodiments, as shown in fig. 4 and 5, the box 1 is further provided with a first mating portion 14; as shown in fig. 6, the cover 3 is provided with a first engaging portion 32; as shown in fig. 1 to 3, the first engaging portion 32 is engageable with the first engaging portion 14 in the longitudinal direction of the case 1 to lock the relative movement of the cover 3 and the case 1 in the longitudinal direction of the case 1 in the end position.

In this embodiment, when the box cover 3 is installed by setting the first matching portion 14 and the first clamping portion 32, the sliding portion 31 is connected to the guiding portion 13, so that the box cover 3 is pushed to slide along the longitudinal direction of the box body 1 relative to the box body 1 to be close to the end position until the first clamping portion 32 is clamped with the first matching portion 14, and the box cover 3 is prevented from continuously moving along the longitudinal direction of the box body 1 relative to the box body 1, so that the box cover 3 and the box body 1 are locked and connected, the box cover 3 and the box body 1 are firmly and reliably locked, the box cover 3 and the box body 1 are prevented from being released, the protection effect of the box cover 3 on the plugging cover 2 and the box body 1 is guaranteed, the protection performance is better, and the long-term normal operation of the photovoltaic junction box is guaranteed.

In some embodiments, one of the first mating portion 14 and the first engaging portion 32 may be a buckle, and the other of the first mating portion 14 and the first engaging portion 32 may be a slot or a hole, and the lid 3 and the case 1 are engaged by a sliding rail buckle connection.

In some embodiments, as shown in fig. 2, 4 and 5, the first mating portion 14 is provided on the guide portion 13; as shown in fig. 2 and 6, the first engaging portions 32 are provided on both sides of the cover 3 corresponding to the guide portions 13. Since the guide portions 13 are disposed on two opposite sides of the case 1, the first mating portions 14 are disposed on the guide portions 13, that is, the first mating portions 14 and the first engaging portions 32 are engaged on two opposite sides of the case 1, and the stress distribution of connection between the case cover 3 and the case 1 is more uniform and the connection strength is higher.

In some embodiments, as shown in fig. 2, 4 and 5, the first engaging portion 14 is provided at one end of the box body 1 in the longitudinal direction; as shown in fig. 2 and 6, the first engaging portion 32 is provided at one end of the lid 3 in the longitudinal direction. The first matching part 14 is arranged at one longitudinal end of the box body 1, the first clamping part 32 is arranged at one longitudinal end of the box cover 3, so that the first matching part 14 and the first clamping part 32 are clamped at one longitudinal end of the box body 1, and the box cover 3 and one longitudinal end of the box body 1 are firmly and stably connected and are not easy to loose.

Of course, as shown in fig. 2, 4 and 5, the first engaging portion 14 may be provided at one end of the case 1 in the longitudinal direction and the guide portion 13 at the same time; correspondingly, as shown in fig. 2 and 6, a first engaging portion 32 is provided at one end of the lid 3 in the longitudinal direction and at both sides of the corresponding guide portion 13. Through setting up first cooperation portion 14 and set up first block portion 32 at the opposite both sides and the vertical one end of box body 1 simultaneously and at the opposite both sides and the vertical one end of lid 3, form the multiple spot connection structure, further strengthen lid 3 and the locking joint strength of box body 1, lid 3 is more firm stable with box body 1 connection, difficult pine takes off, and the reliability is higher.

In some embodiments, the box body 1 is further provided with a second matching portion (not shown in the figure), and the box cover 3 is correspondingly provided with a second clamping portion (not shown in the figure); the wiring cavity has a first wall (not shown) disposed opposite the opening 11; the second mating portion is capable of being snapped with the second snap portion in a direction in which the first wall is directed towards the opening 11, so as to lock the relative movement of the lid 3 and the case 1 in a direction in which the first wall is directed towards the opening 11 in the end position.

In this embodiment, through setting up second cooperation portion and second block portion, second cooperation portion and second block portion are in termination position joint, prevent lid 3 and box body 1 along the directional direction removal of open 11 of first wall for box body 1 to the relative movement of the directional direction of open 11 of first wall is followed to locking lid 3 and box body 1, realizes being connected lid 3 and box body 1 locking, and is more firm reliable, further avoids lid 3 and box body 1 to loosen, ensures lid 3 to the protection effect of shutoff lid 2 and box body 1.

In some embodiments, as shown in fig. 4 and 5, the peripheral wall of the case 1 is convexly provided with a connecting portion 15, and the connecting portion 15 is disposed around the outer edge of the opening 11; as shown in fig. 6, the cap 3 has a cap opening 33; as shown in fig. 2 and 3, the lid opening 33 is connected to the connection portion 15, and the seal 4 is interposed between the lid opening 33 and the connection portion 15.

In this embodiment, through protruding connecting portion 15 that encircles uncovered 11 of establishing on the periphery wall of box body 1 to be connected with lid 3 through connecting portion 15, can ensure lid 3 parcel shutoff lid 2 and uncovered 11 completely, locate lid 33 and connecting portion 15 with sealing member 4 clamp simultaneously between, connect inseparabler, guarantee sealing member 4 seals the installation clearance between lid 3 and the box body 1, and then guarantee shutoff lid 2 and uncovered 11 are isolated with external environment, guarantee the protection effect to shutoff lid 2 and box body 1 and the waterproof sealing effect in butt joint line chamber, effectively reduce waterproof failure, the risk that electric connector intakes.

In some embodiments, as shown in fig. 4 and 5, a groove 16 is provided on the outer peripheral wall of the connection portion 15, the groove 16 extending in the extending direction of the connection portion 15; as shown in fig. 2 and 3, the inner wall of the cap opening 33 is overlapped with the outer peripheral wall of the connecting portion 15, the seal member 4 is fitted into the groove 16, and the seal member 4 elastically abuts against the inner wall of the cap opening 33.

In the embodiment, the inner wall of the cover opening 33 of the box cover 3 is overlapped with the outer peripheral wall of the connecting part 15, so that the connecting area of the box cover 3 and the box body 1 is increased, and the connecting strength is higher, more stable and reliable; the sealing element 4 is embedded in the groove 16 arranged on the connecting part 15, so that the sealing element 4 is conveniently installed on the box body 1, and the box cover 3 is convenient to disassemble and assemble; and the groove 16 is annular around the outer edge of the opening 11, so that the sealing element 4 is ensured to surround the outer edge of the opening 11, the sealing effect of the sealing element 4 on the installation gap between the box cover 3 and the box body 1 is further ensured, and the waterproof sealing performance is improved.

In some embodiments, the seal 4 may be any one of a silicone rubber seal, a fluoro-rubber seal, a TPE (Thermoplastic Elastomer ) seal. Wherein, the silica gel (Silicon dioxide) is a Silicone rubber (Silicone rubber), which is odorless and nontoxic, is not afraid of high temperature and resists severe cold. The fluorine rubber is rubber containing fluorine in the molecule, various types exist according to fluorine content, namely monomer structure, the widely used hexafluoroseries fluorine rubber is marketed by Dupont company at the earliest under the trade name of VITON, the high temperature resistance of the fluorine rubber is superior to that of silicon rubber, the chemical resistance can resist most of oil and solvents (except ketone and esters), the weather resistance and ozone resistance are good, and the fluorine rubber is widely used for sealing parts of automobiles, locomotives and chemical factories, and the using temperature is between-20 ℃ and 200 ℃. Thermoplastic elastomers, TPEs for short, are elastomers that have rubber elasticity at ordinary temperature and plasticizable molding at high temperature.

In some embodiments, as shown in fig. 2 to 5, the connection portion 15 is provided on the outer peripheral wall of the case 1 on the side away from the opening 11. That is, the connecting portion 15 and the opening 11 are respectively located at two opposite sides of the box body 1, so that when the box cover 3 is covered outside the box body 1 and is connected with the connecting portion 15, the box cover 3 can completely wrap the box body 1 and the plugging cover 2, so that the box body 1 and the plugging cover 2 are isolated from the external environment, cracking and failure of the box body 1 and the plugging cover 2 are effectively prevented, the protection performance and the waterproof sealing performance are better, and the risk of waterproof failure and water inflow of the electric connector is effectively reduced.

In some embodiments, as shown in fig. 2 to 5, the connecting portion 15 is provided with a bending portion 17 at an end of the case 1 provided with the engaging portion 12, the bending portion 17 is bent toward the side of the opening 11, and the engaging portion 12 is connected to the bending portion 17.

In this embodiment, through setting up kink 17 and linking portion 12 to link to each other, can increase the longitudinal size of linking portion 12 along box body 1, and then increase linking portion 12 and external cable 200's connection area, linking portion 12 and external cable 200's joint strength is higher, is favorable to guaranteeing the long-term normal work of photovoltaic terminal box.

In some embodiments, as shown in fig. 4 and 5, the opening 11 is disposed at the top of the box body 1, the connection portion 12 is disposed at one end of the box body 1 in the longitudinal direction, the connection portion 15 is disposed around the bottom of the box body 1 in a protruding manner, the connection portion 15 is provided with a bending portion 17 at one end of the box body 1 provided with the connection portion 12, a groove 16 is disposed on the peripheral wall of the connection portion 15, and the groove 16 extends along the entire length of the connection portion 15 to form an annular groove; the guiding part 13 is a chute arranged on the connecting part 15, the chute extends along the longitudinal direction of the box body 1, an inlet of the chute is positioned at one end far away from the connecting part 12, and one side of the inlet of the chute is also provided with a leading-in bevel 131; the first matching part 14 comprises a first buckle arranged on the side edge of the chute and a second buckle arranged on the top of the bending part 17; the plugging cover 2 is embedded in the opening 11. As shown in fig. 6, the lid 3 has a lid opening 33, the sliding portion 31 is a slider provided on two sides of the bottom of the lid 3, and the first engaging portion 32 includes a first slot provided on the outer side of the slider of the lid 3 and a second slot provided on the top of the lid opening 33 of the lid 3. As shown in fig. 2 and 3, the sealing element 4 is a sealing ring, and the sealing ring is embedded in the groove 16; when the box cover 3 is installed, the sliding block is installed in the sliding groove through the inlet of the sliding groove, the leading-in bevel edge 131 plays a role in guiding, the box cover 3 is pushed to slide along the longitudinal direction of the box body 1 and close to the connecting part 12, the sliding block slides in the sliding groove until the first buckle is clamped with the first clamping groove, the second buckle is clamped with the second clamping groove, the box cover 3 moves to a final position, and the box cover 3 is fixedly installed on the box body 1 and covers the outer part of the box body 1.

In some embodiments, the case 1, the closure cap 2 and the case cover 3 are all thermoplastic polymer material parts. Wherein, the thermoplastic polymer material can be any one of PPE (Polypheylene ether, polyphenyl ether), PC (Polycarbonate) and PA (Polyamide, commonly called nylon). Polyphenylene oxide is a high-strength engineering plastic, polycarbonate is also called PC plastic, and is a high-molecular polymer containing carbonate groups in the molecular chain. The polyamide is commonly called nylon, and is a thermoplastic resin general term containing repeated amide groups- (NHCO) on the molecular main chain. Through adopting thermoplastic polymer material, box body 1, shutoff lid 2 and lid 3 have good mechanical strength, and not fragile fracture effectively prevents that box body 1, shutoff lid 2 and lid 3 from splitting the inefficacy.

Specifically, the box body 1, the plugging cover 2 and the box cover 3 can be produced by integrally injection molding by using a mold.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A photovoltaic junction box, characterized in that it comprises:

the box body is provided with a wiring cavity and an opening communicated with the wiring cavity;

the plugging cover is arranged at the opening to close the opening;

the box cover is detachably connected with the box body and covers the outside of the box body; and

the sealing piece is arranged between the box cover and the box body in a sealing way, and the sealing piece surrounds the outer edge of the opening.

2. The photovoltaic junction box according to claim 1, wherein the box cover is slidably connected to the box body along a longitudinal direction of the box body, so that the box cover can be moved to a termination position covered on the box body or to a separation position separated from the box body along the longitudinal direction of the box body.

3. The photovoltaic junction box according to claim 2, wherein the box body is provided with guide parts positioned at two opposite sides of the opening, and the guide parts extend along the longitudinal direction of the box body; the box cover is correspondingly provided with a sliding part which can be matched with the guide part in a sliding way.

4. A photovoltaic junction box according to claim 3, wherein the box body is further provided with a first mating portion, the box cover is correspondingly provided with a first clamping portion, and the first clamping portion can be clamped with the first mating portion in the longitudinal direction of the box body, so that in the end position, the box cover and the box body are locked to move relatively in the longitudinal direction of the box body.

5. The photovoltaic junction box according to claim 4, wherein the first fitting portion is disposed on the guide portion, and the first engaging portion is disposed on two sides of the box cover corresponding to the guide portion;

or, the first matching part is arranged at one longitudinal end of the box body, and the first clamping part is correspondingly arranged at one longitudinal end of the box cover.

6. The photovoltaic junction box according to claim 4, wherein the box body is further provided with a second matching portion, and the box cover is correspondingly provided with a second clamping portion; the wiring cavity is provided with a first wall which is arranged opposite to the opening; the second matching part can be clamped with the second clamping part in the direction that the first wall points to the opening, so that the relative movement of the box cover and the box body along the direction that the first wall points to the opening is locked at the end position.

7. The photovoltaic junction box according to any one of claims 1 to 6, wherein a connecting portion is provided protruding on an outer peripheral wall of the box body, the connecting portion being provided around an outer edge of the opening; the box cover is provided with a cover opening, the cover opening is connected with the connecting part, and the sealing element is clamped between the cover opening and the connecting part.

8. The photovoltaic junction box according to claim 7, wherein an inner wall of the lid opening is overlapped with an outer peripheral wall of the connecting portion; the connecting part is characterized in that a groove is formed in the peripheral wall of the connecting part, the groove extends along the extending direction of the connecting part, the sealing element is embedded in the groove, and the sealing element is elastically abutted to the inner wall of the cover opening.

9. The photovoltaic junction box according to claim 7, wherein the connecting portion is provided on a side of the outer peripheral wall of the box body away from the opening.

10. The photovoltaic junction box according to any one of claims 1 to 6, wherein the blocking cover is embedded within the opening.