A photovoltaic grid-connected integrated distribution box

Abstract

The present invention relates to the technical field of photovoltaic grid-connected distribution boxes, and discloses a photovoltaic grid-connected integrated distribution box, which includes a distribution box main body, a wire inlet and outlet board arranged at the lower part of the distribution box main body, and a cable passing through the wire inlet and outlet board. The cable is wound around a winding component for several turns and passes out of the winding component, and both ends of the cable passing out of the winding component are subjected to the pulling force of the winding component. A conical sleeve is installed on the end face of the wire inlet and outlet board far away from the distribution box through a connecting sleeve, a connecting ear and a fastener. A sealing cover plate is hinged to the large head part of the conical sleeve through a hinge component, and a support component is arranged between the end face of the conical sleeve and the sealing cover plate. The support component is easily melted under high temperature. The present invention can effectively prevent the fire at the external connection cable from spreading to the inside of the distribution box and can automatically extinguish the fire source on the cable that is about to enter the distribution box, effectively protecting the safety of the distribution box and surrounding building equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic grid-connected distribution boxes, and specifically to a photovoltaic grid-connected integrated distribution box. Background Art

[0002] Photovoltaic power generation is a technology that directly converts light energy into electrical energy by utilizing the photovoltaic effect at the semiconductor interface. It mainly consists of three major parts: solar panels (modules), controllers, and inverters, and the main components are composed of electronic components. Solar cells can be connected in series and then encapsulated and protected to form large-area solar cell modules, and then combined with components such as power controllers to form a photovoltaic power generation device.

[0003] As an important part in the process of photovoltaic power generation, a photovoltaic distribution box generally has functions such as power isolation, short-circuit protection, and electric energy metering. A photovoltaic distribution box usually integrates many electrical components inside, and finally conducts unified wiring through the outgoing line ports of the distribution box. When a fire breaks out at a certain external cable, the fire source is likely to spread along the cable to the outgoing line ports of the distribution box. Since multiple external cables are concentratedly arranged at the outgoing line ports, the unburned cables will be ignited, and finally the flame will intensify and spread into the distribution box along multiple cables at the outgoing line ports, eventually burning out the electrical components inside the distribution box, causing greater property losses. At the same time, due to the increase in the fire situation, it is likely to endanger the equipment and buildings around the distribution box. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a photovoltaic grid-connected integrated distribution box, which solves the problem that the fire at the external cable of the existing photovoltaic distribution box is likely to spread along the cable into the distribution box, thereby causing greater property losses.

[0006] (II) Technical Solutions

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0008] A photovoltaic grid-connected integrated distribution box, comprising a distribution box main body, an incoming and outgoing line board arranged at the lower part of the distribution box main body, and a cable passing through the incoming and outgoing line board. The cable located inside the distribution box penetrates through a fixing frame, and the fixing frame is fixedly connected to the incoming and outgoing line board. A winding component is arranged on the fixing frame. The cable is wound around the winding component for several turns and passes through the winding component. The two ends of the cable passing through the winding component are subjected to the pulling force of the winding component. A conical sleeve is installed on the end face of the incoming and outgoing line board away from the distribution box through a connecting sleeve, a connecting ear and a fastener. The cable passes through the conical sleeve and sequentially passes through a sealing cover component and an outgoing line hole arranged on the conical sleeve. There is an interference fit between the sealing cover component and the cable. The large head of the conical sleeve is hinged with a sealing cover plate through a hinge component. A support component is arranged between the end face of the conical sleeve and the sealing cover plate. The cable is bent and passes through the sealing cover plate under the limiting action of the support component. A second elastic member is fixedly connected between the sealing cover plate and the end face of the conical sleeve. Under normal conditions, the second elastic member is in a stretched state. The support component is easily melted at high temperatures. When the support component is melted, the support for the sealing cover plate is cancelled. At this time, the sealing cover plate seals and covers the outgoing line hole under the drive of the second elastic member.

[0009] Preferably, the winding component includes a limiting disc, a winding shaft arranged between the limiting discs, and an intermediate shaft penetrating through the limiting discs. The intermediate shaft is fixedly connected with the limiting discs. The intermediate shaft is rotationally connected with the fixing frame through a vertical plate. One side of the limiting disc is fixedly connected with a connecting rod. The end of the connecting rod away from the intermediate shaft is fixedly connected with the fixing frame through a first elastic member.

[0010] Preferably, a plurality of the sealing cover components are arranged at equal intervals in the conical sleeve. The sealing cover component includes an installation ring fixedly connected with the cavity wall of the conical sleeve and a first sealing ring. The first sealing ring is fixedly connected to the cavity wall of the installation ring. There is an interference fit between the first sealing ring and the cable.

[0011] Preferably, a fitting hole for cooperating with the hinge component is arranged on the sealing cover plate. A passing hole is arranged on the sealing cover plate. The cable passes through the passing hole.

[0012] Preferably, the support component includes an H-shaped support frame. The H-shaped support frame is made of a material that is easily melted at high temperatures. The cable is bent at the cross bar of the H-shaped support frame and passes through.

[0013] Preferably, the support component further includes a first insertion sleeve and a second insertion sleeve. The first insertion sleeve is arranged on the end face of the conical sleeve. A rectangular groove is arranged on the sealing cover plate. The second insertion sleeve is arranged in the rectangular groove. The H-shaped support is movably inserted between the first insertion sleeve and the second insertion sleeve.

[0014] Preferably, a plug for sealing holes is fixedly connected to the sealing cover plate through a connecting column. A plurality of second sealing rings are arranged at equal intervals on the outer surface of the plug for sealing holes. The annular end surface of the plug for sealing holes close to the conical sleeve is chamfered. The second sealing rings can be in interference fit with the emergence holes.

[0015] Preferably, the sealing cover plate and the conical sleeve can be magnetically fixed through a magnetic attraction assembly. The magnetic attraction assembly includes a metal strip fixed on the sealing cover plate, a magnetic attraction groove arranged on the end surface of the conical sleeve, and a magnetic strip arranged in the magnetic attraction groove. The metal strip can be magnetically adsorbed by the magnetic strip.

[0016] (III) Beneficial effects

[0017] The present invention has the following beneficial effects:

[0018] For the photovoltaic grid-connected integrated distribution box, through the arranged support assembly, the sealing cover plate and the second elastic member, a sealed cavity can be formed in cooperation with the sealing cover plate, the conical sleeve and the sealing cover assembly, and the cable end with a fire source can be made to enter the sealed cavity. When the oxygen in the sealed cavity is exhausted, the flame at the cable end will naturally go out at this time; through the arranged wire winding assembly and the sealing cover assembly, when the cable burns in the sealed cavity, due to the lack of the supporting force of the support assembly, the pulling force applied by the wire winding assembly will drive the end of the cable with the flame to continuously move towards the sealing cover assembly, and the flame on the cable will be extinguished due to the extrusion of the sealing cover assembly. In the present invention, by separately treating the combustible oxygen and the fire source at the cable end with the flame, the fire at the external connection cable can be effectively prevented from spreading to the inside of the distribution box and the fire source on the cable that is about to enter the distribution box can be automatically extinguished, effectively protecting the safety of the distribution box and the surrounding building equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a schematic diagram of the overall structure of the present invention from the bottom view;

[0021] Figure 3 is a schematic diagram of the installation layout structure of the wire winding assembly, the conical sleeve and the sealing plate of the present invention;

[0022] Figure 4 is a schematic diagram of the internal structure of the conical sleeve of the present invention;

[0023] Figure 5 is a schematic diagram of the installation structure of the sealing cover assembly of the present invention;

[0024] Figure 6 is a schematic diagram of the installation structure of the upper structure on the sealing cover plate of the present invention;

[0025] Figure 7 This is a schematic diagram of the installation structure of the sealing cover plate and the conical sleeve of the present invention.

[0026] In the figure: 1, the main body of the distribution box; 2, the incoming and outgoing line board; 3, the fixing frame; 4, the connecting sleeve; 41, the connecting ear; 5, the conical sleeve; 6, the cable; 7, the winding component; 71, the vertical plate; 72, the middle shaft; 73, the limiting disc; 74, the winding shaft; 75, the connecting rod; 76, the first elastic member; 8, the sealing cover component; 81, the mounting ring; 82, the first sealing ring; 9, the wire outlet hole; 10, the sealing cover plate; 101, the hinge component; 102, the mating hole; 103, the second elastic member; 104, the passing hole; 105, the connecting column; 106, the hole plug; 107, the second sealing ring; 11, the support component; 111, the first socket; 112, the H-shaped support frame; 113, the second socket; 114, the rectangular groove; 12, the magnetic attraction component; 121, the metal strip; 122, the magnetic attraction groove. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figure 1 , the present invention provides a technical solution: a photovoltaic grid-connected integrated distribution box, including the main body 1 of the distribution box, the incoming and outgoing line board 2 arranged at the lower part of the main body 1 of the distribution box, and the cable 6 passing through the incoming and outgoing line board 2. The cable 6 located inside the distribution box penetrates through the fixing frame 3. The fixing frame 3 is fixedly connected to the incoming and outgoing line board 2. A winding component 7 is arranged on the fixing frame 3. The cable 6 is wound around the winding component 7 for several turns and passes through the winding component 7. The two ends of the cable 6 passing through the winding component 7 are subjected to the pulling force of the winding component 7; the end surface of the incoming and outgoing line board 2 away from the distribution box is installed with a conical sleeve 5 through the connecting sleeve 4 and the connecting ear 41 in cooperation with a fastener. The cable 6 passes out of the conical sleeve 5 and sequentially passes through the sealing cover component 8 and the wire outlet hole 9 arranged on the conical sleeve 5. The sealing cover component 8 and the cable 6 are in interference fit; the large head of the conical sleeve 5 is hinged with a sealing cover plate 10 through a hinge component 101. A support component 11 is arranged between the end surface of the conical sleeve 5 and the sealing cover plate 10. The cable 6 is bent and then passes through the sealing cover plate 10 under the limiting action of the support component 11. A second elastic member 103 is fixedly connected between the sealing cover plate 10 and the end surface of the conical sleeve 5. Under normal conditions, the second elastic member 103 is in a stretched state. The support component 11 is easily melted at high temperatures. When the support component 11 is melted, the support for the sealing cover plate 10 is cancelled. At this time, the sealing cover plate 10 is driven by the second elastic member 103 to seal and cover the wire outlet hole 9.

[0029] In the present invention, through the support assembly 11, the sealing cover plate 10 and the second elastic member 103 provided, when a fire occurs at one end of the cable 6 far from the tapered sleeve 5, when the cable 6 burns to the support assembly 11, at this time the support assembly 11 fuses, and the supporting force for the sealing cover plate 10 is not sufficient to overcome the elastic force of the second elastic member 103. Therefore, the sealing cover plate 10 will rotate and seal the wire outlet hole 9, so that the cable 6 located in the tapered sleeve 5 is in the sealed cavity formed by the sealing cover plate 10, the tapered sleeve 5 and the sealing cover assembly 8. When the oxygen in the sealed cavity is exhausted, the flame at the end of the cable 6 will naturally go out. Through the winding assembly 7 and the sealing cover assembly 8 provided, when the cable 6 burns in the sealed cavity, due to the lack of the supporting force of the support assembly 11, the pulling force applied by the winding assembly 7 will drive the end of the cable 6 with the flame to continuously move towards the sealing cover assembly 8. During the movement, the oxygen in the above-mentioned sealed cavity is continuously consumed. Ideally, at this time, the flame at the end of the cable 6 will naturally go out as the oxygen in the sealed cavity is exhausted. However, due to the existence of air leakage, the cable 6 may continue to burn. At this time, under the pulling of the winding assembly 7, the end of the cable 6 with the flame will quickly pass through the sealing cover assembly 8. At this time, due to the interference fit between the sealing cover assembly 8 and the cable 6, the flame on the cable 6 will be squeezed by the sealing cover assembly 8 and then go out, thus preventing the fire at the end of the cable 6 far from the distribution box from spreading along the cable 6 to the inside of the distribution box. In summary, by separately treating the combustible substance oxygen and the fire source at the end of the cable 6 with the flame, the fire at the external connection cable 6 can be effectively prevented from spreading to the inside of the distribution box and the fire source on the cable that is about to enter the distribution box can be automatically extinguished, effectively protecting the safety of the distribution box and the surrounding building equipment.

[0030] In this embodiment, the winding assembly 7 includes a limiting disk 73, a winding shaft 74 arranged between the limiting disks 73, and an intermediate shaft 72 passing through the limiting disks 73. The intermediate shaft 72 is fixedly connected to the limiting disks 73. The intermediate shaft 72 is rotatably connected to the fixing frame 3 through a vertical plate 71. One side of the limiting disk 73 is fixedly connected with a connecting rod 75. One end of the connecting rod 75 far from the intermediate shaft 72 is fixedly connected to the fixing frame 3 through a first elastic member 76. Refer to Figure 4 As shown, through the winding shaft 74 and the first elastic member 76 provided, it is convenient for personnel to wind and pass the cable 6 through the winding shaft 74, and during the winding process, the first elastic member 76 is pulled, so that the winding shaft 74 has a certain pulling force on the wound cable 6, so as to facilitate the reset of the winding assembly 7 in the subsequent process and then quickly pull the cable 6 to extinguish the fire on it.

[0031] In this embodiment, a plurality of seal cover assemblies 8 are arranged at equal intervals within the conical sleeve 5. The seal cover assembly 8 includes a mounting ring 81 fixedly connected to the wall of the cavity of the conical sleeve 5 and a first sealing ring 82. The first sealing ring 82 is fixedly connected to the wall of the cavity of the mounting ring 81, and there is an interference fit between the first sealing ring 82 and the cable 6. Refer to Figure 5 As shown, by providing a plurality of seal cover assemblies 8, when the cable 6 is pulled at the fire starting end and quickly passes through the first sealing ring 82 within the first seal cover assembly 8, even if the fire has not been extinguished at this time, the subsequent seal cover assemblies 8 will function again, causing the fire source to be extinguished, thereby improving the stability of extinguishing the fire source and reducing uncertainty.

[0032] In this embodiment, a mating hole 102 for cooperating with the hinge assembly 101 is provided on the seal cover plate 10, and a passing hole 104 is provided on the seal cover plate 10. The cable 6 passes through the passing hole 104.

[0033] In this embodiment, the support assembly 11 includes an H-shaped support frame 112 made of a high-temperature fusible material. The cable 6 is bent at the crossbar of the H-shaped support frame 112 and passes through. Refer to Figure 6 And 7 As shown, by providing the H-shaped support frame 112 made of a high-temperature fusible material such as a fusible alloy or a rigid plastic material, when the cable 6 continues to burn to the bent portion, at this time, due to the material properties, the H-shaped support frame 112 will first melt, thereby canceling the support effect on the seal cover plate 10. Then, driven by the second elastic member 103, the seal cover plate 10 will seal the wire outlet hole 9, and at this time, the end of the cable 6 with the fire source is isolated within the aforementioned seal cavity.

[0034] In this embodiment, the support assembly 11 further includes a first socket 111 and a second socket 113. The first socket 111 is provided on the end face of the conical sleeve 5. A rectangular groove 114 is provided on the seal cover plate 10, and the second socket 113 is provided within the rectangular groove 114. The H-shaped support is movably inserted between the first socket 111 and the second socket 113. Refer to Figure 6 And 7As shown, by providing the first socket 111 and the second socket 113, it is possible to facilitate the replacement of a new H-shaped support frame 112 by personnel after the H-shaped support frame 112 comes into play, so as to facilitate the subsequent normal use of the entire photovoltaic distribution box; by providing the rectangular groove 114, when the H-shaped support frame 112 melts, the sealing cover 10 will rotate under the drive of the second elastic member 103 and will not cover the wire outlet hole 9. At this time, the remaining part of the H-shaped support frame 112 will be extruded and deformed. The aforementioned rectangular groove 114 can facilitate the retraction and extension of the deformed H-shaped support frame 112, reducing the influence of the residual frame part of the H-shaped support frame 112 on the sealing and shielding of the wire outlet hole 9 by the sealing cover 10.

[0035] In this embodiment, a plugging stopper 106 is fixedly connected to the sealing cover 10 through a connecting column 105. A plurality of second sealing rings 107 are arranged at equal intervals on the outer surface of the plugging stopper 106. The annular end surface of the plugging stopper 106 close to the tapered sleeve 5 is chamfered. The second sealing rings 107 can be in interference fit with the wire outlet hole. Refer to Figure 6 And 7 As shown, by providing the plugging stopper 106 and a plurality of second sealing rings 107, when the sealing cover 10 covers and seals the wire outlet hole 9, the plugging stopper will first be inserted into the wire outlet hole, and the second sealing rings 107 will be in interference fit with the wire outlet hole, thereby ensuring the sealing performance at the wire outlet hole 9; by chamfering the plugging stopper 106, it can effectively prevent the edge of the plugging stopper 106 from engaging with the end surface of the tapered sleeve 5, making it difficult for the plugging stopper 106 to be inserted into the wire outlet hole 9, and thus affecting the sealing treatment of the wire outlet hole 9.

[0036] In this embodiment, the sealing cover 10 and the tapered sleeve 5 can be magnetically fixed through a magnetic attraction assembly 12. The magnetic attraction assembly 12 includes a metal strip 121 fixed to the sealing cover 10, a magnetic attraction groove 122 provided on the end surface of the tapered sleeve 5, and a magnetic strip provided in the magnetic attraction groove 122. The metal strip 121 can be magnetically attracted by the magnetic strip. Refer to Figure 6 And 7 As shown, by providing the magnetic assembly, when the sealing cover 10 covers, it can cooperate with the second elastic member 103 to increase the covering force of the sealing cover 10, thereby improving the sealing performance of the plugging stopper and the second sealing rings 107 thereon for the wire outlet hole 9.

[0037] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic grid-connected integrated distribution box, comprising a distribution box main body, an incoming and outgoing line board arranged at the lower part of the distribution box main body, and a cable passing through the incoming and outgoing line board, characterized in that: The cable located inside the distribution box passes through a fixing bracket, which is fixedly connected to the incoming and outgoing line board. A wire winding assembly is arranged on the fixing bracket. The cable is wound around the wire winding assembly for several turns and then passes through the wire winding assembly. The two ends of the cable passing through the wire winding assembly are subjected to the pulling force of the wire winding assembly. On the end face of the incoming and outgoing line board away from the distribution box, a tapered sleeve is installed through a connecting sleeve, a connecting ear and a fastener. The cable passes through the tapered sleeve and sequentially passes through a sealing cover assembly and an outlet hole arranged on the tapered sleeve. There is an interference fit between the sealing cover assembly and the cable. The large head of the tapered sleeve is hinged with a sealing cover plate through a hinging assembly. A supporting assembly is arranged between the end face of the tapered sleeve and the sealing cover plate. The cable bends under the limiting action of the supporting assembly and then passes through the sealing cover plate. A second elastic member is fixedly connected between the sealing cover plate and the end face of the tapered sleeve. Under normal conditions, the second elastic member is in a stretched state. The supporting assembly is easily melted at high temperatures. When the supporting assembly is melted, the support for the sealing cover plate is cancelled. At this time, the sealing cover plate seals and covers the outlet hole under the drive of the second elastic member.

2. The integrated photovoltaic grid-connected distribution box according to claim 1, characterized in that: The wire winding assembly includes a limiting disc, a wire winding shaft arranged between the limiting discs and an intermediate shaft passing through the limiting discs. The intermediate shaft is fixedly connected to the limiting discs. The intermediate shaft is rotationally connected to the fixing bracket through a vertical plate. One side of the limiting disc is fixedly connected with a connecting rod. One end of the connecting rod away from the intermediate shaft is fixedly connected to the fixing bracket through a first elastic member.

3. A photovoltaic grid-connected integrated distribution box according to claim 1 or 2, characterized in that: A plurality of the sealing cover assemblies are arranged at equal intervals in the tapered sleeve. The sealing cover assembly includes an installation ring fixedly connected to the cavity wall of the tapered sleeve and a first sealing ring. The first sealing ring is fixedly connected to the cavity wall of the installation ring. There is an interference fit between the first sealing ring and the cable.

4. A photovoltaic grid-connected integrated distribution box according to claim 1 or 2, characterized in that: The sealing cover plate is provided with a cooperation hole for cooperating with the hinging assembly and a passing hole. The cable passes through the passing hole.

5. A photovoltaic grid-connected integrated distribution box according to claim 1 or 2, characterized in that: The supporting assembly includes an H-shaped support frame, which is made of a material that is easily melted at high temperatures. The cable bends at the cross bar of the H-shaped support frame and then passes through.

6. The integrated photovoltaic grid-connected distribution box according to claim 5, characterized in that: The supporting assembly further includes a first insertion sleeve and a second insertion sleeve. The first insertion sleeve is arranged on the end face of the tapered sleeve. A rectangular groove is arranged on the sealing cover plate. The second insertion sleeve is arranged in the rectangular groove. The H-shaped support is movably inserted between the first insertion sleeve and the second insertion sleeve.

7. A photovoltaic grid-connected integrated distribution box according to claim 6, characterized in that: A sealing plug is fixedly connected to the sealing cover plate through a connecting column. A plurality of second sealing rings are arranged at equal intervals on the outer surface of the sealing plug. The annular end face of the sealing plug close to the tapered sleeve is chamfered. The second sealing ring can be in interference fit with the outlet hole.

8. A photovoltaic grid-connected integrated distribution box according to claim 6 or 7, characterized in that: The sealing cover plate and the tapered sleeve can be magnetically fixed through a magnetic attraction assembly. The magnetic attraction assembly includes a metal strip fixed on the sealing cover plate, a magnetic attraction groove arranged on the end face of the tapered sleeve and a magnetic strip arranged in the magnetic attraction groove. The metal strip can be magnetically attracted by the magnetic strip.

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