A solar photovoltaic junction box with active fire protection

Abstract

The present invention discloses a solar photovoltaic junction box with active fire protection, which relates to the technical field of junction boxes, including a box body, a fire extinguishing mechanism, a stirring mechanism and a blower mechanism. A conductor is arranged inside the box body, a cover is arranged at the top of the box body, a sealing mechanism is arranged between the box body and the cover, and the fire extinguishing mechanism is arranged at the bottom end of the cover body. The fire extinguishing mechanism includes a fire extinguishing powder, a placement cavity is provided at the bottom end of the cover body, the fire extinguishing powder is arranged inside the placement cavity, and a movable baffle is symmetrically slidably arranged at the bottom of the placement cavity, and a trigger mechanism is arranged between the movable baffle and the cover body. The present invention utilizes the setting of the fire extinguishing mechanism. When a fire occurs in the circuit inside the box body, the two movable baffles are moved in opposite directions through the cooperation of the trigger mechanism, so that the fire extinguishing powder in the placement cavity can fall and cover the inside of the box body, so that the fire extinguishing powder in the placement cavity is extinguished in the placement cavity, thereby improving the safety of the junction box operation.

Description

Technical Field

[0001] The invention relates to the technical field of junction boxes, and in particular to a solar photovoltaic junction box with active fire protection. Background Art

[0002] The solar photovoltaic junction box is a connection device between the solar cell array composed of solar cell modules and the solar charging control device. It is used to connect photovoltaic modules and loads, draw out the current generated by the modules and generate power. The solar photovoltaic junction box draws out the current generated by the solar modules through wiring terminals and connectors and imports it into electrical equipment.

[0003] With long-term use, the solar photovoltaic junction box will be exposed to a humid and dusty environment due to material aging and reduced sealing performance, causing short circuits and burning of the wiring. In addition, the diodes, terminals and other components in the junction box may malfunction due to quality problems or long-term use, such as diode breakdown and loose terminals, causing internal burning of the junction box.

[0004] When the solar photovoltaic junction box is working, damage to the internal wire sheath or components may directly cause a short circuit inside the junction box, generating high temperature and electric arc, which may cause combustion. During operation, when the current exceeds the tolerance range of the junction box or internal components, an overload will occur. The overload will cause the wires to overheat or even melt, thus causing a fire.

[0005] In summary, the solar photovoltaic junction box may burn during operation. However, the current solar photovoltaic junction box only uses flame retardant materials for the box body in terms of fire prevention, but the effect is poor and can only prevent the flame inside the junction box from spreading to the outside. However, the continuous burning inside the junction box will cause damage to the components inside the junction box. For this reason, we propose a solar photovoltaic junction box with active fire prevention. Summary of the invention

[0006] The object of the present invention is to provide a solar photovoltaic junction box with active fire protection to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a solar photovoltaic junction box with active fire protection, comprising:

[0008] A box body, wherein a conductor is arranged inside the box body, a cover body is arranged at the top of the box body, and a sealing mechanism is arranged between the box body and the cover body;

[0009] A fire extinguishing mechanism, the fire extinguishing mechanism is arranged at the bottom end of the cover body, the fire extinguishing mechanism includes a fire extinguishing powder, a placement cavity is opened at the bottom end of the cover body, the fire extinguishing powder is arranged inside the placement cavity, a movable baffle is symmetrically slidably arranged at the bottom of the placement cavity, and a trigger mechanism is arranged between the movable baffle and the cover body;

[0010] A stirring mechanism, wherein the stirring mechanism is arranged inside the placement cavity;

[0011] The air blowing mechanism is arranged inside the cover body.

[0012] Preferably, the conductor is a composite structure, and the conductor comprises an aluminum plate, and a copper conductive layer is provided at the top and bottom of the aluminum plate.

[0013] Preferably, the trigger mechanism includes a first connecting rope, the bottom ends of the two movable baffles are fixedly connected to a fixing piece, the first connecting rope is arranged between the two fixing pieces, the bottom end of the cover body is symmetrically provided with a slide groove, the inner wall of the slide groove is slidably connected with a slide plate, a first spring is arranged between the slide plate and the inner wall of the slide groove, a connecting groove is provided between the slide groove and the placement cavity, the outer wall of the movable baffle is slidably connected to the inner wall of the connecting groove, one side of the movable baffle is fixedly connected to the end of the slide plate, the inner wall of the slide groove is fixedly connected to a fixing rod, one side of the slide plate is provided with a first movable hole, the outer wall of the fixing rod is movably connected to the inner wall of the first movable hole, and the first spring is sleeved on the outer wall of the fixing rod.

[0014] Preferably, the stirring mechanism includes a movable rod, a first socket is provided between the slide groove and the placement cavity, a rubber sleeve is provided inside the first socket, the movable rod is inserted inside the rubber sleeve, a plurality of extrusion protrusions are provided at intervals at the bottom end of the movable rod, a second movable hole is provided on the outer wall of the slide plate, a clamping hole is provided on the inner wall of the second movable hole, a squeezing ball is movably provided on the inner wall of the clamping hole, and a spring sheet is provided between the outer wall of the squeezing ball and the inner wall of the clamping hole.

[0015] Preferably, the blowing mechanism includes a first piston plate, a connecting chamber is opened inside the cover body, the outer wall of the first piston plate is slidably connected to the inner wall of the connecting chamber, a plurality of connecting holes are opened between the connecting chamber and the placement chamber, a movable block is symmetrically and fixedly connected to the top end of the first piston plate, a third movable hole is opened at the top end of the inner wall of the connecting chamber, the outer wall of the movable block is movably connected to the inner wall of the third movable hole, a first movable groove is opened on the inner wall of the third movable hole, a connecting ring is fixedly sleeved on the outer wall of the movable block, the outer wall of the connecting ring is slidably connected to the inner wall of the first movable groove, a second spring is arranged on the top end of the connecting ring, the second spring is sleeved on the outer wall of the movable block, and a release mechanism is arranged between the two movable blocks.

[0016] Preferably, the release mechanism includes a second connecting rope, a wire groove is opened at the top of the first movable groove, the interior of the wire groove is connected with the interior of the placement cavity, the second connecting rope is arranged inside the placement cavity and the two wire grooves, the two ends of the second connecting rope are respectively fixedly connected to the tops of the two movable blocks, and a cutting mechanism is arranged inside the placement cavity.

[0017] Preferably, the cutting mechanism includes a blade, which is arranged inside the placement cavity, and the blade is fixedly connected to the bottom end of the movable rod, the blade edge of the blade faces the second connecting rope, the outer wall of the movable rod and the inner part of the skateboard are fixedly sleeved with a fixing ring, and a blocking mechanism is provided at one end of the movable rod.

[0018] Preferably, the blocking mechanism includes a limiting plate, a fourth movable hole is provided on the inner wall of the slide groove, one end of the movable rod is interlaced with the inside of the fourth movable hole, a second movable groove is provided on the inner wall of the fourth movable hole, the outer wall of the limiting plate is slidably connected with the inner wall of the second movable groove, a third spring is provided on the top of the limiting plate, a second plug hole is provided on the inner wall of the slide groove, the interior of the second plug hole is communicated with the interior of the second movable groove, a plug plate is fixedly connected to one side of the slide plate, the plug plate corresponds to the second plug hole, a first inclined surface is provided on the top of the plug plate, a slot is provided on one side of the limiting plate, and a second inclined surface is provided on the top of the inner wall of the slot.

[0019] Preferably, a plurality of fifth movable holes are opened at the bottom end of the cover body, the inner walls of the fifth movable holes are movably connected with guide rods, and a plurality of guide holes are opened at the top end of the box body, the outer walls of the guide rods are movably connected with the inner walls of the guide holes.

[0020] Preferably, the sealing mechanism includes a rubber sheet, an annular groove is provided at the bottom end of the outer wall of the cover body, the rubber sheet is fixedly connected to the inner wall of the annular groove, an annular cavity is provided on the inner wall of the annular groove, a sliding cavity is provided on the inner wall of the fifth movable hole, a second piston plate is slidably connected to the inner wall of the sliding cavity, the bottom end of the second piston plate is fixedly connected to the top end of the guide rod, a fourth spring is provided on the top end of the second piston plate, and a connecting groove is provided between the sliding cavity and the annular cavity.

[0021] Technical effects and advantages of the present invention:

[0022] The present invention utilizes the setting of the fire extinguishing mechanism. When a fire occurs in the circuit inside the box body, the two movable baffles move away from each other through the cooperation of the trigger mechanism, so that the fire extinguishing powder in the placement cavity falls and covers the inside of the box body, so that the fire is extinguished in the placement cavity by the fire extinguishing powder, thereby improving the safety of the junction box operation.

[0023] The present invention utilizes the setting of the stirring mechanism. When the trigger mechanism works, the slide plate moves. During the movement, the squeezing ball contacts the squeezing protrusion, thereby causing the movable rod to be impacted and vibrated. At this time, the part of the movable rod located inside the placement cavity stirs the fire extinguishing powder inside the placement cavity, thereby facilitating the fire extinguishing powder to fall from the placement cavity, thereby improving the working stability of the fire extinguishing mechanism.

[0024] The present invention utilizes the setting of the air blowing mechanism. When the trigger mechanism works, the slide plate moves until the slide plate contacts the fixed ring. As the slide plate continues to move, the fixed ring is driven to move, thereby causing the movable rod to move. When the movable rod moves, it drives the blade to move until the blade cuts off the second connecting rope. At this time, under the elastic action of the second spring, the connecting ring drives the movable block to move downward. The downward movement of the movable block can drive the first piston plate to move downward. The downward movement of the first piston plate can press the air in the connecting chamber into the placement chamber through the connecting hole, thereby allowing the fire extinguishing powder in the placement chamber to be blown to the inside of the box body. When the junction box is not placed normally, the fire extinguishing powder in the placement chamber can be blown to the inside of the box body, thereby allowing the fire extinguishing mechanism to work, further improving the safety of the use of the junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the box body of the present invention;

[0027] Figure 3 This is a schematic diagram of the front cross-sectional structure of the cover body of the present invention;

[0028] Figure 4 It is a schematic diagram of the side cross-sectional structure of the cover body of the present invention;

[0029] Figure 5 It is a front cross-sectional structural schematic diagram of the sealing mechanism of the present invention;

[0030] Figure 6 It is a schematic diagram of the side cross-sectional structure of the hair dryer structure of the present invention;

[0031] Figure 7 For the present invention Figure 6 A local enlarged structural schematic diagram;

[0032] Figure 8 It is a schematic diagram of the local three-dimensional structure of the limiting plate of the present invention;

[0033] Fig. 9 It is a schematic diagram of the front cross-sectional structure of the extrusion ball of the present invention.

[0034] In the figure: 101, box body; 102, cover body; 103, conductor; 201, placement cavity; 202, fire extinguishing powder; 203, movable baffle; 204, fixing piece; 205, first connecting rope; 206, slide groove; 207, slide plate; 208, first spring; 209, fixing rod; 210, first movable hole; 301, first plug hole; 302, rubber sleeve; 303, movable rod; 304, second movable hole; 305, extrusion protrusion; 306, clamping hole; 307, extrusion ball; 308, spring sheet; 401, connecting cavity; 402, first piston plate; 403, connecting hole; 404, third movable hole; 405, movable block; 406, wire groove; 407, second connecting rope; 408, first movable groove; 409, connecting ring; 410, second spring; 501, blade; 502, fixing ring; 503, fourth movable hole; 504, second movable groove; 505, limit plate; 506, third spring; 507, plug plate; 508, first inclined surface; 509, second plug hole; 510, slot; 511, second inclined surface; 601, fifth movable hole; 602, guide rod; 603, guide hole; 701, annular groove; 702, rubber sheet; 703, annular cavity; 704, second piston plate; 705, connecting groove; 706, fourth spring; 707, sliding cavity. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The present invention provides Figure 1-Figure 9 A solar photovoltaic junction box with active fire protection is shown, including a box body 101, a fire extinguishing mechanism, a stirring mechanism and a blowing mechanism. A conductor 103 is arranged inside the box body 101, a cover body 102 is arranged at the top of the box body 101, a sealing mechanism is arranged between the box body 101 and the cover body 102, a plurality of fifth movable holes 601 are opened at the bottom end of the cover body 102, and the inner wall of the fifth movable hole 601 is movably connected with a guide rod 602, a plurality of guide holes 603 are opened at the top end of the box body 101, and the outer wall of the guide rod 602 is movably connected with the inner wall of the guide hole 603. When the box body 101 and the cover body 102 are fixed, the cover body 102 is covered on the top of the box body 101, and the guide rod 602 is inserted into the corresponding guide hole 603, and then the bolts are penetrated through the cover body 102 and screwed into the box body 101, so that the box body 101 and the cover body 102 can be fixed for use.

[0037] In a preferred embodiment, the fire extinguishing mechanism is arranged at the bottom end of the cover body 102, and the fire extinguishing mechanism includes a fire extinguishing powder 202. A placement cavity 201 is opened at the bottom end of the cover body 102, and the fire extinguishing powder 202 is arranged inside the placement cavity 201. A movable baffle 203 is symmetrically slidably arranged at the bottom of the inner cavity of the placement cavity 201, and a trigger mechanism is arranged between the movable baffle 203 and the cover body 102. When a fire occurs in the circuit inside the box body 101, the two movable baffles 203 are moved in opposite directions through the cooperation of the trigger mechanism, so that the fire extinguishing powder 202 in the placement cavity 201 can fall and cover the inside of the box body 101, so that the fire is extinguished in the placement cavity 201 by the fire extinguishing powder 202, thereby improving the safety of the junction box operation.

[0038] The conductor 103 is a composite structure, which includes an aluminum plate, and a copper conductive layer is provided at the top and bottom of the aluminum plate. The density of the conductor 103 under the composite structure is between 37% and 40% of the density of pure copper, so the conductor 103 is lighter. Compared with copper, aluminum has better tensile strength, bendability and elongation. For this reason, the performance of the conductor 103 in terms of tensile strength, bendability and elongation is improved to a certain extent compared with the copper conductor. At the same time, the ductility of the copper-aluminum conductor can be enhanced, so that the conductor 103 During flushing, shearing and bending, no cracking or separation will occur, the AC current carrying capacity of the conductor 103 can reach 85% of the AC current carrying capacity of pure copper, and the conductive performance is not significantly reduced. The overall thickness of the conductor 103 is 0.72mm-0.9mm, the thickness of the aluminum plate is 0.6mm-0.7mm, and the single-layer thickness of the copper conductive layer is 0.06mm-0.1mm. Preferably, the thickness of the conductor 103 is 0.8mm, the thickness of the aluminum plate is 0.64mm, and the single-layer thickness of the copper conductive layer is 0.08mm.

[0039] The trigger mechanism includes a first connecting rope 205, the bottom ends of the two movable baffles 203 are fixedly connected with a fixing piece 204, the first connecting rope 205 is arranged between the two fixing pieces 204, the bottom end of the cover body 102 is symmetrically provided with a slide groove 206, the inner wall of the slide groove 206 is slidably connected with a slide plate 207, a first spring 208 is arranged between the slide plate 207 and the inner wall of the slide groove 206, a connecting groove is provided between the slide groove 206 and the placement cavity 201, the outer wall of the movable baffle 203 is slidably connected with the inner wall of the connecting groove, one side of the movable baffle 203 is fixedly connected with the end of the slide plate 207, and the slide plate 207 is slidably connected with the inner wall of the slide groove 206. A fixing rod 209 is fixedly connected to the inner wall of the groove 206, a first movable hole 210 is opened on one side of the slide plate 207, the outer wall of the fixing rod 209 is movably connected with the inner wall of the first movable hole 210, and the first spring 208 is sleeved on the outer wall of the fixing rod 209. When a flame appears inside the box body 101, the flame burns the first connecting rope 205, and the two slide plates 207 can move inside the slide groove 206 under the elastic action of the first spring 208, thereby driving the movable baffle 203 to move, so that the fire extinguishing powder 202 in the placement cavity 201 can fall, thereby achieving the effect of fire extinguishing.

[0040] The stirring mechanism is arranged inside the placement cavity 201, and the stirring mechanism includes a movable rod 303, a first plug hole 301 is arranged between the slide groove 206 and the placement cavity 201, a rubber sleeve 302 is arranged inside the first plug hole 301, the movable rod 303 is inserted inside the rubber sleeve 302, and a plurality of extrusion protrusions 305 are arranged at intervals at the bottom end of the movable rod 303, a second movable hole 304 is opened on the outer wall of the slide plate 207, and a clamping hole 306 is opened on the inner wall of the second movable hole 304, and the inner wall of the clamping hole 306 is movable. The card is provided with a squeezing ball 307, and a spring sheet 308 is provided between the outer wall of the squeezing ball 307 and the inner wall of the card hole 306. When the trigger mechanism is working, the slide plate 207 moves, and the squeezing ball 307 will contact the squeezing protrusion 305 during the movement, so that the movable rod 303 is impacted and vibrated. At this time, the part of the movable rod 303 located inside the placement cavity 201 will stir the fire extinguishing powder 202 inside the placement cavity 201, thereby facilitating the fire extinguishing powder 202 to fall from the placement cavity 201, thereby improving the stability of the fire extinguishing mechanism.

[0041] The blower mechanism is arranged inside the cover body 102, and the blower mechanism includes a first piston plate 402. A connecting chamber 401 is provided inside the cover body 102. The outer wall of the first piston plate 402 is slidably connected to the inner wall of the connecting chamber 401. A plurality of connecting holes 403 are provided between the connecting chamber 401 and the placement chamber 201. A movable block 405 is symmetrically fixedly connected to the top of the first piston plate 402. A third movable hole 404 is provided at the top of the inner wall of the connecting chamber 401. The outer wall of the movable block 405 is movably inserted and connected to the inner wall of the third movable hole 404. A first movable groove 408 is provided on the inner wall of the third movable hole 404. A connecting ring 409 is fixedly sleeved on the outer wall of the movable block 405. The outer wall of the connecting ring 409 is connected to the first movable groove 408. The inner wall of the groove 408 is slidably connected, and a second spring 410 is arranged on the top of the connecting ring 409. The second spring 410 is sleeved on the outer wall of the movable block 405. A release mechanism is arranged between the two movable blocks 405, and the release mechanism includes a second connecting rope 407. A wire groove 406 is opened on the top of the first movable groove 408. The interior of the wire groove 406 is connected with the interior of the placement cavity 201. The second connecting rope 407 is arranged in the placement cavity 201 and the interior of the two wire grooves 406. The two ends of the second connecting rope 407 are respectively fixedly connected to the tops of the two movable blocks 405. A cutting mechanism is arranged inside the placement cavity 201. The cutting mechanism includes a blade 501. The blade 501 is arranged inside the placement cavity 201. The blade 501 is fixed The bottom end of the movable rod 303 is fixedly connected, and the blade 501 faces the second connecting rope 407. The outer wall of the movable rod 303 and the inner part of the slide plate 207 are fixedly sleeved with a fixing ring 502. One end of the movable rod 303 is provided with a blocking mechanism. When the trigger mechanism works, the slide plate 207 moves until the slide plate 207 contacts the fixing ring 502. The fixing ring 502 can be driven to move as the slide plate 207 continues to move, thereby moving the movable rod 303. When the movable rod 303 moves, it will drive the blade 501 to move until the blade 501 cuts off the second connecting rope 407. At this time, under the elastic action of the second spring 410, the connecting ring 409 can drive the movable block 405 to move downward, and the movable block 405 moves downward. The first piston plate 402 can be driven to move downward, and the downward movement of the first piston plate 402 can press the air in the connecting chamber 401 into the placement chamber 201 through the connecting hole 403, so that the fire extinguishing powder 202 in the placement chamber 201 can be blown to the inside of the box body 101, that is, when the junction box is not placed normally, the fire extinguishing powder 202 in the placement chamber 201 can also be blown to the inside of the box body 101, so that the fire extinguishing mechanism can work, and the safety of the use of the junction box is further improved. Through the setting of the second connecting rope 407, even if the blade 501 cannot cut the second connecting rope 407, the flame in the junction box can directly burn the second connecting rope 407, so that the blower mechanism can work stably.

[0042] The blocking mechanism includes a limit plate 505, an inner wall of the slide groove 206 is provided with a fourth movable hole 503, one end of the movable rod 303 is interlaced with the interior of the fourth movable hole 503, the inner wall of the fourth movable hole 503 is provided with a second movable groove 504, the outer wall of the limit plate 505 is slidably connected with the inner wall of the second movable groove 504, a third spring 506 is provided at the top of the limit plate 505, a second plug hole 509 is provided on the inner wall of the slide groove 206, the interior of the second plug hole 509 is connected with the interior of the second movable groove 504, a plug plate 507 is fixedly connected to one side of the slide plate 207, the plug plate 507 corresponds to the second plug hole 509, a first inclined surface 508 is provided at the top of the plug plate 507, a slot 510 is provided on one side of the limit plate 505, and the top of the inner wall of the slot 510 is opened. A second inclined surface 511 is provided, and through the elastic action of the third spring 506, the limit plate 505 can be inserted into the fourth movable hole 503 to block the movable rod 303, so that the movement of the slide plate 207 before it contacts the fixed ring 502 will not drive the movable rod 303 to move. Only when the slide plate 207 moves and drives the plug plate 507 to move, the plug plate 507 is inserted into the second plug hole 509, and then the second plug hole 509 is inserted into the slot 510, so that the first inclined surface 508 squeezes the second inclined surface 511, that is, the movement of the plug plate 507 will drive the limit plate 505 to move up, until the limit plate 505 is separated from the fourth movable hole 503, at this time, the limit of the movable rod 303 is released, and the slide plate 207 can drive the movable rod 303 to move after contacting the fixed ring 502.

[0043] The sealing mechanism includes a rubber sheet 702, an annular groove 701 is provided at the bottom end of the outer wall of the cover body 102, the rubber sheet 702 is fixedly connected to the inner wall of the annular groove 701, an annular cavity 703 is provided on the inner wall of the annular groove 701, a sliding cavity 707 is provided on the inner wall of the fifth movable hole 601, a second piston plate 704 is slidably connected to the inner wall of the sliding cavity 707, the bottom end of the second piston plate 704 is fixedly connected to the top end of the guide rod 602, a fourth spring 706 is provided on the top end of the second piston plate 704, a connecting groove 705 is provided between the sliding cavity 707 and the annular cavity 703, and then When the box body 101 and the cover body 102 are fixed, the guide rod 602 will be inserted into the guide hole 603 for guidance, and as the cover body 102 is pressed down, the guide rod 602 drives the second piston plate 704 to rise, compressing the fourth spring 706, and at the same time, the second piston plate 704 moves upward to squeeze the air in the sliding chamber 707 into the annular chamber 703 through the connecting groove 705, so that the inside of the annular chamber 703 is in a positive pressure state, so that the annular groove 701 is deformed and tightly pressed against the inner wall of the box body 101, thereby increasing the sealing effect between the cover body 102 and the box body 101.

[0044] After flame appears inside the junction box, the flame burns the first connecting rope 205, and the two slide plates 207 can move inside the slide groove 206 under the elastic action of the first spring 208, thereby driving the movable baffle 203 to move, so that the fire extinguishing powder 202 in the placement chamber 201 can fall down, and at the same time, the squeezing ball 307 will contact the squeezing protrusion 305 during the movement of the slide plate 207, so that the movable rod 303 is impacted and vibrated. At this time, the part of the movable rod 303 located inside the placement chamber 201 will stir the fire extinguishing powder 202 inside the placement chamber 201, increasing the fluidity of the fire extinguishing powder 202 in the placement chamber 201, thereby facilitating the fire extinguishing powder 202 to fall from the placement chamber 201. When the slide plate 207 moves, it drives the plug plate 507 to move, so that the plug plate 507 is inserted into the second plug hole 509, and then the second plug hole 509 is inserted into the slot 510, so that the first inclined surface 508 is pressed against the second inclined surface 511. The movement of the plug plate 507 will drive the limit plate 505 to move upward until the limit plate 505 is separated from the fourth movable hole 503. At this time, the limit of the movable rod 303 is released, and the slide plate 207 can drive the movable rod 303 to move after contacting the fixing ring 502. The movement of the movable rod 303 drives the blade 501 to move until the blade 501 cuts off the second connecting rope 407. At this time, under the elastic action of the second spring 410, the connecting ring 409 drives the movable block 405 to move downward. The downward movement of the movable block 405 can drive the first piston plate 402 to move downward. The downward movement of the first piston plate 402 can press the air in the connecting chamber 401 into the placement chamber 201 through the connecting hole 403, so that the fire extinguishing powder 202 in the placement chamber 201 can be blown to the inside of the box body 101, that is, when the junction box is not placed normally, the fire extinguishing powder 202 in the placement chamber 201 can also be blown to the inside of the box body 101.

[0045] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solar photovoltaic junction box with active fire protection, characterized in that: include: A box body (101), wherein a conductor (103) is arranged inside the box body (101), a cover body (102) is arranged at the top of the box body (101), and a sealing mechanism is arranged between the box body (101) and the cover body (102); A fire extinguishing mechanism, the fire extinguishing mechanism is arranged at the bottom end of the cover body (102), the fire extinguishing mechanism comprises a fire extinguishing powder (202), a placement cavity (201) is provided at the bottom end of the cover body (102), the fire extinguishing powder (202) is arranged inside the placement cavity (201), a movable baffle (203) is symmetrically slidably provided at the bottom of the inner cavity of the placement cavity (201), a trigger mechanism is provided between the movable baffle (203) and the cover body (102), a sliding groove (206) is symmetrically provided at the bottom end of the cover body (102), and a sliding plate (207) is slidably connected to the inner wall of the sliding groove (206); A stirring mechanism, the stirring mechanism is arranged inside the placement cavity (201), the stirring mechanism comprises a movable rod (303), one end of the movable rod (303) is provided with a blocking mechanism, the blocking mechanism comprises a limiting plate (505), one side of the limiting plate (505) is provided with a slot (510), the top end of the inner wall of the slot (510) is provided with a second inclined surface (511), one side of the slide plate (207) is fixedly connected with an inserting plate (507), the position of the inserting plate (507) corresponds to the second inserting hole (509), and the top end of the inserting plate (507) is provided with a first inclined surface (508); A blower mechanism is provided inside the cover body (102).

2. A solar photovoltaic junction box with active fire protection according to claim 1, characterized in that: The conductor (103) is a composite structure, and comprises an aluminum plate, with a copper conductive layer being provided at the top and bottom of the aluminum plate.

3. A solar photovoltaic junction box with active fire protection according to claim 1, characterized in that: The trigger mechanism comprises a first connecting rope (205), the bottom ends of the two movable baffles (203) are fixedly connected with a fixing piece (204), the first connecting rope (205) is arranged between the two fixing pieces (204), a first spring (208) is arranged between the slide plate (207) and the inner wall of the slide groove (206), a connecting groove is provided between the slide groove (206) and the placement cavity (201), the outer wall of the movable baffle (203) is slidably connected with the inner wall of the connecting groove, one side of the movable baffle (203) is fixedly connected with the end of the slide plate (207), the inner wall of the slide groove (206) is fixedly connected with a fixing rod (209), one side of the slide plate (207) is provided with a first movable hole (210), the outer wall of the fixing rod (209) is movably connected with the inner wall of the first movable hole (210), and the first spring (208) is sleeved on the outer wall of the fixing rod (209).

4. A solar photovoltaic junction box with active fire protection according to claim 3, characterized in that: A first plug hole (301) is provided between the slide groove (206) and the placement cavity (201), a rubber sleeve (302) is provided inside the first plug hole (301), the movable rod (303) is inserted inside the rubber sleeve (302), a plurality of extrusion protrusions (305) are provided at intervals at the bottom end of the movable rod (303), a second movable hole (304) is provided on the outer wall of the slide plate (207), a clamping hole (306) is provided on the inner wall of the second movable hole (304), an extrusion ball (307) is movably clamped on the inner wall of the clamping hole (306), and a spring sheet (308) is provided between the outer wall of the extrusion ball (307) and the inner wall of the clamping hole (306).

5. A solar photovoltaic junction box with active fire protection according to claim 4, characterized in that: The hair dryer mechanism comprises a first piston plate (402), a connecting cavity (401) is provided inside the cover body (102), the outer wall of the first piston plate (402) is slidably connected to the inner wall of the connecting cavity (401), a plurality of connecting holes (403) are provided between the connecting cavity (401) and the placement cavity (201), a movable block (405) is symmetrically fixedly connected to the top end of the first piston plate (402), a third movable hole (404) is provided at the top end of the inner wall of the connecting cavity (401), and the outer wall of the movable block (405) is provided with a plurality of connecting holes (403) and a plurality of connecting holes (403) are provided between the connecting cavity (401) and the placement cavity (201). The movable block (405) is movably connected to the inner wall of the third movable hole (404); the inner wall of the third movable hole (404) is provided with a first movable groove (408); the outer wall of the movable block (405) is fixedly sleeved with a connecting ring (409); the outer wall of the connecting ring (409) is slidably connected to the inner wall of the first movable groove (408); a second spring (410) is provided at the top end of the connecting ring (409); the second spring (410) is sleeved on the outer wall of the movable block (405); and a release mechanism is provided between the two movable blocks (405).

6. A solar photovoltaic junction box with active fire protection according to claim 5, characterized in that: The release mechanism comprises a second connecting rope (407); a wire groove (406) is provided at the top of the first movable groove (408); the interior of the wire groove (406) is connected to the interior of the placement cavity (201); the second connecting rope (407) is arranged inside the placement cavity (201) and the two wire grooves (406); the two ends of the second connecting rope (407) are respectively fixedly connected to the tops of the two movable blocks (405); and a cutting mechanism is arranged inside the placement cavity (201).

7. A solar photovoltaic junction box with active fire protection according to claim 6, characterized in that: The cutting mechanism comprises a blade (501), wherein the blade (501) is arranged inside the placement cavity (201), and the blade (501) is fixedly connected to the bottom end of the movable rod (303), and the blade of the blade (501) faces the second connecting rope (407). A fixing ring (502) is fixedly sleeved on the outer wall of the movable rod (303) and located inside the slide plate (207).

8. The solar photovoltaic junction box with active fire protection according to claim 7, characterized in that: The inner wall of the slide groove (206) is provided with a fourth movable hole (503), one end of the movable rod (303) is interlaced with the inside of the fourth movable hole (503), the inner wall of the fourth movable hole (503) is provided with a second movable groove (504), the outer wall of the limiting plate (505) is slidably connected to the inner wall of the second movable groove (504), the top of the limiting plate (505) is provided with a third spring (506), the inner wall of the slide groove (206) is provided with a second plug hole (509), and the interior of the second plug hole (509) is connected to the interior of the second movable groove (504).

9. The solar photovoltaic junction box with active fire protection according to claim 1, characterized in that: The bottom end of the cover body (102) is provided with a plurality of fifth movable holes (601), the inner wall of the fifth movable hole (601) is movably connected with a guide rod (602), and the top end of the box body (101) is provided with a plurality of guide holes (603), the outer wall of the guide rod (602) is movably connected with the inner wall of the guide hole (603).

10. A solar photovoltaic junction box with active fire protection according to claim 9, characterized in that: The sealing mechanism comprises a rubber sheet (702), an annular groove (701) is provided at the bottom end of the outer wall of the cover body (102), the rubber sheet (702) is fixedly connected to the inner wall of the annular groove (701), an annular cavity (703) is provided on the inner wall of the annular groove (701), a sliding cavity (707) is provided on the inner wall of the fifth movable hole (601), a second piston plate (704) is slidably connected to the inner wall of the sliding cavity (707), the bottom end of the second piston plate (704) is fixedly connected to the top end of the guide rod (602), a fourth spring (706) is provided on the top end of the second piston plate (704), and a connecting groove (705) is provided between the sliding cavity (707) and the annular cavity (703).

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