CN105471388A - Long-service-life and high-reliability maintainable photovoltaic terminal box - Google Patents
Long-service-life and high-reliability maintainable photovoltaic terminal box Download PDFInfo
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- CN105471388A CN105471388A CN201610038793.5A CN201610038793A CN105471388A CN 105471388 A CN105471388 A CN 105471388A CN 201610038793 A CN201610038793 A CN 201610038793A CN 105471388 A CN105471388 A CN 105471388A
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- sealing ring
- annular groove
- base
- terminal
- groove
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention discloses a long-service life and high-reliability maintainable photovoltaic terminal box. The terminal box comprises a base, an upper cover, a sealing ring, a bottom plate, terminals, a confluence band clamp, a diode clamp and a dido; the sealing ring is arranged in an annular groove in the base and blocked by a buckling hook on the outer wall of the annular groove; when the upper cover is matched with the base, the cover edge is inserted in the annular groove to extrude the sealing ring to form sealing; a special-shaped sealing ring is arranged in a sealing ring placement groove in a wiring port of the base; and two sealing interference regions on the special-shaped sealing ring are in interference with a cable and the inner wall of the sealing ring placement groove respectively, so that the reliable sealing for the photovoltaic terminal box is realized. The confluence band clamp and the diode clamp both adopt a cage-type structure; and meanwhile, after the confluence band clamp and the diode clamp are assembled on the terminals, the overall structure of the assembled confluence band clamp and the diode clamp is positioned on the outer sides of the terminals, so that the radiating area is enlarged, concentrated heating is avoided, and the reliable radiation and the maintainability of the photovoltaic terminal box are realized.
Description
Technical field
The present invention relates to photovoltaic junction box field of structural design, particularly a kind of long-life highly reliable maintainable photovoltaic junction box.
Background technology
Be used for connecting the vitals of photovoltaic module and inverter in photovoltaic junction box solar power system.
The application scenario of photovoltaic junction box comprises various harsh and unforgiving environments, makes photovoltaic junction box excellent sealing, and avoiding external agency to infiltrate the inner function of terminal box impact, is one of target of photovoltaic junction box design.Existing photovoltaic junction box is by sealant pouring and sealing for the sealing of cable point of incoming cables mostly, higher to the requirement of technique, as technique is not up to standard, easily produces air bubble and causes seal failure, thus affect the reliability of photovoltaic junction box, reduce the life-span of photovoltaic junction box.
Sealing between the upper cover of photovoltaic junction box and base is realized by rubber sealing ring between the two mostly.Sealing ring is installed in the cell body of upper cover, and the block other by cell body blocks to be unlikely to come off.Its shortcoming is that sealing ring easily comes off; The upper cover thickness at sealing ring place place is less, and intensity is lower; Sealing ring is stuck in cell body, block crush seal circle, and sealing ring is easily out of shape aging, affects its life-span; Sealing ring also extrudes upper cover, and the easy stress deformation of upper cover causes poor sealing; Sealing ring and chassis interior do not have heat to isolate, and the heat that tray interior device sends easily is transmitted on sealing ring, affects the life-span of sealing ring; Sealing ring and chassis interior do not have electromagnetic isolation, and the band electrical distance between human body and tray interior electrification device is little, easily causes various short circuit, fire and explosion accident.
The specification of existing photovoltaic junction box is towards the future development of miniaturization, also more and more higher to the requirement of the heat radiation of inside.Diode on terminal is important heater element, and it is very near that the position that diode presss from both sides with the strap clamp that confluxes, diode is leaned on, and heat Relatively centralized, does not distribute not go out, and makes the heat radiation increasing pressure of junction box large.Under the prerequisite not increasing terminal box volume, realizing the optimization of photovoltaic junction box heat dispersion, is also one of target of photovoltaic junction box design.
Summary of the invention
For existing photovoltaic junction box the problems referred to above in sealing reliability and thermal diffusivity, applicant, through Improvement, provides a kind of long-life highly reliable maintainable photovoltaic junction box.Photovoltaic junction box of the present invention has that intensity is high, the life-span is long, the advantage of good airproof performance, can reduce heating, reduction photovoltaic junction box volume.
Technical scheme of the present invention is as follows:
A kind of long-life highly reliable maintainable photovoltaic junction box, comprise the base, upper cover and the sealing ring between the two that mutually cover, in described base, base plate is installed, described base plate is provided with multiple terminal, each terminal is provided with conflux strap clamp and diode folder, between the diode folder of terminals of adjacent, diode is installed;
The top of base is provided with annular groove, and the part of base in the inside and outside both sides of annular groove be the inwall of looping groove and the outer wall of annular groove respectively, and the top of the outer wall of annular groove is provided with to the outstanding clasp in the direction of annular groove; Sealing ring is positioned over annular groove inside, is blocked among annular groove by the clasp on annular groove outer wall; All sides of upper cover are provided with a circle cover rim, and when upper cover matches with base, cover rim inserts in annular groove, the bottom of cover rim and sealing ring upper contact, sealing ring lower potion and annular groove base and interior side contacts;
The side of base is provided with plug wire hole, the inwall of plug wire hole is provided with a circle sealing ring standing groove, is placed with fixing ring in described sealing ring standing groove, and cable is connected with terminal through described plug wire hole; The second seal interference region that fixing ring comprises fixing ring main body, is arranged at the first seal interference region in fixing ring main body inner circle and is arranged on fixing ring main body cylindrical; Fixing ring main body is contained in sealing ring standing groove, and the first seal interference region and cable are interfered mutually, and the inwall of the second seal interference region and sealing ring standing groove is interfered mutually; In the connection jaws bore of the side of cable, be placed with the first solidus block, be placed with the second solidus block at cable opposite side, described second solidus block and base are fixed by ultrasonic bonding, and the outer wall of the first solidus block, the second solidus block and cable is interfered;
Conflux strap clamp and diode folder for cage construction, is assemblied in the two ends of terminal respectively; Fit over after on terminal when conflux strap clamp and diode clamp, entirety is positioned at the outside of terminal.
Its further technical scheme is: the width of described sealing ring is less than the width of annular groove, and the width being greater than annular groove deducts the width that clasp projects to annular groove.
Its further technical scheme is: the outer wall of described cover rim is provided with groove, and when upper cover matches with base, the clasp on base is in the groove of upper cover.
Its further technical scheme is: described first seal interference region, the second seal interference region can be the protruding entities be just arranged on when not extruding in fixing ring main body, also can be formed by a part of deformation of fixing ring main body itself after being squeezed.
Its further technical scheme is: the middle part of described terminal is offered porose, and convergent belt passes and connects the strap clamp that confluxes from described hole.
Advantageous Effects of the present invention is:
1, sealing ring is arranged in the base instead of in upper cover, sealing ring difficult drop-off, and it is very large that upper cover thickness can do, and increases the intensity of upper cover.
2, sealing ring is in free state, is not squeezed, and can not damage because of distortion, the life-span is higher; Also can reduce the extruding of sealing ring to box body, avoid box body to be out of shape, be conducive to the raising of sealing property.
3, the device isolation of sealing ring and tray interior comes by the inwall of annular groove, can reduce being heated of sealing ring, increases band electrical distance.
4, fixing ring and cable and box body have multiple interference region, constitute multiple waterproof, and improve reliability, solidus block can play the effect of fixed cable and fixing ring position.
5, conflux strap clamp and diode folder adopt detachable, separable cage construction, realize the quick-replaceable after diode being punctured in site operation, raising photovoltaic junction box maintainability.
6, conflux strap clamp and diode is clipped in terminal bodies and installs at a distance, increases area of dissipation, realizes the internal thermal equilibrium of photovoltaic junction box and protect diode.
7, convergent belt can penetrate the hole in the middle part of terminal and be connected with the strap clamp that confluxes, and avoids convergent belt and need penetrate required space from the front of terminal or side, reaches the object reducing terminal box volume.
Accompanying drawing explanation
Fig. 1 is explosive view of the present invention.
Fig. 2 is the structure chart of base of the present invention.
Fig. 3 is the structure chart of upper cover of the present invention.
Fig. 4 is the front sectional view that the present invention assembles that rear box body covers place.
Fig. 5 is the three-dimensional cutaway view that the present invention assembles that rear box body covers place.
Fig. 6 is the three-dimensional cutaway view that the present invention assembles rear cable point of incoming cables.
Fig. 7 is the front sectional view that the present invention assembles rear cable point of incoming cables.
Fig. 8 is the structure chart of fixing ring of the present invention.
Fig. 9 is the structure chart after terminal assemblies of the present invention is installed.
Figure 10 is the schematic diagram after terminal assemblies of the present invention is installed in box body.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
As shown in Figure 1, photovoltaic junction box of the present invention comprises the base 3 and upper cover 2 that mutually cover, sealing ring 1 is provided with between base 3 and upper cover 2, base plate 4 is installed in base 3, base plate 4 is provided with multiple terminal 6, each terminal 6 is provided with conflux strap clamp 5 and diode folder 7, between the diode folder 7 of terminals of adjacent 6, diode 8 is installed.
As shown in Figure 2, the top of base 3 is provided with a ring annular groove 3-1, and the part of base 3 in the inside and outside both sides of annular groove 3-1 be the inwall 3-2 of looping groove and the outer wall 3-3 of annular groove respectively.The height of the inwall 3-2 of annular groove is greater than the height of the outer wall 3-3 of annular groove.The devices such as base plate 4, terminal 6 are installed in the region surrounded by the inwall 3-2 of annular groove.The top of the outer wall 3-3 of annular groove is provided with to the outstanding many places clasp 3-4 in the direction of annular groove 3-1.On the girth of each clasp 3-4 almost equally spaced outer wall 3-3 being distributed in annular groove.It should be noted that diagram just preferred embodiment of the present invention, in actual design, the quantity of clasp 3-4 and distribution mode can unrestricted choice.
As shown in Figure 3, all sides of upper cover 2 are provided with a circle cover rim 2-1, and the width of cover rim 2-1 is less than the width of annular groove 3-1, and the outer wall of cover rim 3-1 is provided with groove 3-2.
As shown in Figure 4 and Figure 5, during installation, sealing ring 1 is positioned in annular groove 3-1, width due to sealing ring 1 is less than the width of annular groove 3-1, and the width being greater than annular groove 3-1 deducts the width that clasp 3-4 projects to annular groove 3-1, therefore sealing ring 1 is blocked among annular groove 3-1 by the clasp 3-4 on annular groove outer wall 3-3, and sealing ring 1 drops down onto the bottom of annular groove 3-1, can not drop out; When not installing upper cover 2, sealing ring 1 itself can not be squeezed.Cover rim 3-1 inserts in annular groove 3-1, and the clasp 3-4 on base 3 falls into the groove 2-2 of upper cover 2, thus cover rim 2-1 is inserted smoothly and not by the stop of clasp 3-4; After cover rim 3-1 is inserted into the end, its bottom and sealing ring 1 upper contact, crush seal circle 1 makes its underpart and annular groove 3-1 base and interior side contacts, realizes sealing.Make to form independently space in the inwall 3-2 of annular groove, structure relevant with sealing to sealing ring 1 grade for the device wherein installed is isolated.
As shown in Figure 6 and Figure 7, base 3 side starts there is several plug wire hole 3-5 passed for cable, and the inwall of plug wire hole 3-5 is provided with a circle sealing ring standing groove 3-6.Fixing ring 9 is placed with in sealing ring standing groove 3-6.
As shown in Figure 8, the composition structure of fixing ring 9 comprises: fixing ring main body 9-1 identical with existing ring structure, be arranged at the first seal interference region 9-2 in fixing ring main body 9-1 inner circle and be arranged at the second seal interference region 9-3 on fixing ring main body 9-1 cylindrical.Described interference region can be the protruding entity be just arranged on when not extruding on fixing ring main body 9-1, also can be formed by a part of deformation of fixing ring main body 9-1 itself after being squeezed.
As shown in Figure 6 and Figure 7, during assembling cable, first photovoltaic junction box is turned around, fixing ring 9 is placed in the sealing ring standing groove 3-6 of base 3; Then, the first solidus block 10 is placed in the hole of base 3; Then, insert cable to make it to be connected with terminal 6 through the plug wire hole 3-5 of base 3, the first seal interference region 9-2 on the extruding lower different type sealing ring 9 of cable and cable produce interferes, and the second seal interference region 9-3 also produces with the inwall of sealing ring standing groove 3-6 and interferes simultaneously; Finally, place the second solidus block 11 in the opposite side of cable, and itself and base 3 ultrasonic bonding are fixed.First solidus block 10 and the second solidus block 11 are interfered with cable, position, ensure that cable and fixing ring 9 under any circumstance can not be shifted to cable and fixing ring 9.
As shown in Figure 9 and Figure 10, terminal 6 is equipped with conflux strap clamp 5 and diode folder 7, conflux strap clamp 5 and diode folder 7 are cage construction, and conflux strap clamp 5 and diode folder 7 are assemblied in the two ends of terminal 6 respectively.Conflux strap clamp 5 and diode folder 7 after mounting, and entirety is positioned at the outside of terminal 6.Due to conflux strap clamp 5 and the mounting distance of diode folder 7 on terminal 6 comparatively far away, increase area of dissipation, reduce the possibility that heat is concentrated, the internal thermal equilibrium of photovoltaic junction box can be realized and protect diode 8.In addition, porose 6-1 is offered at the middle part of terminal 6, can pass from described hole 6-1 for convergent belt and be connected with the strap clamp 5 that confluxes, avoid convergent belt and need penetrate required space from the front of terminal 6 or side, can reduce the volume of photovoltaic junction box.Conflux strap clamp 5, diode folder 7 adopt detachable, separable cage construction, can realize in site operation, diode being punctured rear convenience, being changed fast, raising photovoltaic junction box maintainability.For the connection of cable and terminal 6, can riveting method provided by the present invention, also can adopt the modes such as wire clamp clamp, screw wiring, welding, in the present invention, this not limited.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive without departing from the basic idea of the present invention or associate, all should think and be included within protection scope of the present invention.
Claims (5)
1. a long-life highly reliable maintainable photovoltaic junction box, comprise the base (3), upper cover (2) and the sealing ring between the two (1) that mutually cover, base plate (4) is installed in described base (3), described base plate (4) is provided with multiple terminal (6), each terminal (6) is provided with the strap clamp that confluxes (5) and diode folder (7), between diode folder (7) of terminals of adjacent (6), diode (8) is installed;
It is characterized in that:
The top of base (3) is provided with annular groove (3-1), the part of base (3) in annular groove (3-1) inside and outside both sides be the inwall (3-2) of looping groove and the outer wall (3-3) of annular groove respectively, and the top of the outer wall (3-3) of annular groove is provided with to the outstanding clasp (3-4) in the direction of annular groove (3-1); It is inner that sealing ring (1) is positioned over annular groove (3-1), is blocked among annular groove (3-1) by the clasp (3-4) on annular groove outer wall (3-3); All sides of upper cover (2) are provided with a circle cover rim (2-1), when upper cover (2) matches with base (3), cover rim (2-1) inserts in annular groove (3-1), the bottom of cover rim (2-1) and sealing ring (1) upper contact, sealing ring (1) bottom and annular groove (3-1) base and interior side contacts;
The side of base (3) is provided with plug wire hole (3-5), the inwall of plug wire hole (3-5) is provided with a circle sealing ring standing groove (3-6), be placed with fixing ring (9) in described sealing ring standing groove (3-6), cable is connected with terminal (6) through described plug wire hole (3-5); The second seal interference region (9-3) that fixing ring (9) comprises fixing ring main body (9-1), is arranged at the first seal interference region (9-2) in fixing ring main body (9-1) inner circle and is arranged on fixing ring main body (9-1) cylindrical; Fixing ring main body (9-1) is contained in sealing ring standing groove (3-6), first seal interference region (9-2) and cable are interfered mutually, and the second seal interference region (9-3) is interfered mutually with the inwall of sealing ring standing groove (3-6); The first solidus block (10) is placed with in connection jaws seat (1) hole of the side of cable, the second solidus block (11) is placed with at cable opposite side, described second solidus block (11) and base (3) are fixed by ultrasonic bonding, and the first solidus block (10), the second solidus block (11) are interfered with the outer wall of cable;
Conflux strap clamp (5) and diode folder (7) be cage construction, be assemblied in the two ends of terminal (6) respectively; When the strap clamp that confluxes (5) and diode folder (7) are assemblied in after on terminal (6), entirety is positioned at the outside of terminal (6).
2. long-life according to claim 1 highly reliable maintainable photovoltaic junction box, it is characterized in that: the width of described sealing ring (1) is less than the width of annular groove (3-1), and the width being greater than annular groove (3-1) deducts the width that clasp (3-4) projects to annular groove (3-1).
3. long-life according to claim 1 highly reliable maintainable photovoltaic junction box, it is characterized in that: the outer wall of described cover rim (2-1) is provided with groove (2-2), when upper cover (2) matches with base (3), the clasp (3-4) on base (3) is in the groove (2-2) of upper cover (2).
4. long-life according to claim 1 highly reliable maintainable photovoltaic junction box, it is characterized in that: described first seal interference region (9-2), the second seal interference region (9-3) can be just be arranged on the protruding entity in fixing ring main body (9-1) when not extruding, also can be formed by a part of deformation of fixing ring main body (9-1) itself after being squeezed.
5. long-life according to claim 1 highly reliable maintainable photovoltaic junction box, it is characterized in that: the middle part of described terminal (6) is offered porose (6-1), convergent belt passes and connects the strap clamp that confluxes (5) from described hole (6-1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610038793.5A CN105471388B (en) | 2016-01-20 | 2016-01-20 | A kind of long-life highly reliable maintainable photovoltaic junction box |
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| CN201610038793.5A CN105471388B (en) | 2016-01-20 | 2016-01-20 | A kind of long-life highly reliable maintainable photovoltaic junction box |
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| CN105471388A true CN105471388A (en) | 2016-04-06 |
| CN105471388B CN105471388B (en) | 2017-12-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105870854A (en) * | 2016-06-07 | 2016-08-17 | 苏州禾昌聚合材料股份有限公司 | Cable junction box |
| CN106452350A (en) * | 2016-10-28 | 2017-02-22 | 东莞市北扬工业设计有限公司 | Solar junction device |
| CN107046205A (en) * | 2017-02-09 | 2017-08-15 | 无锡百祺电子科技有限公司 | The connector attachment structure of anti-strike-through |
| CN107785715A (en) * | 2016-08-30 | 2018-03-09 | 浙江鑫辉光伏科技有限公司 | A kind of economic terminal box of reliable easy care |
| CN108923158A (en) * | 2018-08-21 | 2018-11-30 | 上海航天科工电器研究院有限公司 | A kind of OT terminal terminal box fast uncapped |
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| CN108923158A (en) * | 2018-08-21 | 2018-11-30 | 上海航天科工电器研究院有限公司 | A kind of OT terminal terminal box fast uncapped |
| CN108923158B (en) * | 2018-08-21 | 2023-08-11 | 上海航天科工电器研究院有限公司 | OT terminal junction box capable of rapidly uncovering |
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| CN105471388B (en) | 2017-12-26 |
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Effective date of registration: 20230731 Address after: No. 2, Xiabao Road, Yueqing Bay Port District, Yueqing, Wenzhou City, Zhejiang Province 325600 Patentee after: Zhejiang Zhengtai Xinhui Photovoltaic Co.,Ltd. Address before: 325600 Wei Er Lu, Economic Development Zone, Yueqing City, Wenzhou City, Zhejiang Province Patentee before: ZHEJIANG XINHUI PHOTOVOLTAIC TECHNOLOGY CO.,LTD. |