CN116488011B - Ring main unit for photovoltaic power generation - Google Patents

Abstract

The application relates to the field of ring main units, in particular to a ring main unit for photovoltaic power generation, which comprises a box body, wherein a cavity for accommodating electric equipment is formed in the box body, a box door for closing an opening of the cavity is rotated on the box body, air holes for ventilation are formed in the box body and the box door, a closing module for closing the opening of the air holes is arranged on the inner wall of the cavity, a triggering block is arranged on the inner wall of the cavity in a sliding manner, a lifting rope for blowing is arranged on the triggering block, the closing module comprises a closing assembly, the closing assembly comprises a closing piece which is arranged on the inner wall of the cavity in a sliding manner and is used for closing the opening of the air holes, a limiting rod for limiting the closing piece is arranged on the inner wall of the cavity in a sliding manner, and the triggering block is used for pushing the limiting rod to slide so as to release the limit of the closing piece. The application has the effect of reducing the loss on ignition.

Description

Ring main unit for photovoltaic power generation

Technical Field

The application relates to the field of ring main units, in particular to a ring main unit for photovoltaic power generation.

Background

Along with the execution of the carbon reduction policy, photovoltaic power generation is increasingly paid attention to as clean energy, and electric energy generated by photovoltaic equipment can be generally integrated into a power grid after passing through a ring main unit, wherein the ring main unit contains electrical equipment such as a three-phase inversion DC/AC converter, an isolated power frequency transformer and the like, and the electrical equipment at least comprises one device with an isolation function.

Because the electrical equipment in the ring main unit needs ventilation, moisture prevention and ventilation and cooling, ventilation holes and outside air communication exist on the ring main unit frequently, so that an outside fire source can influence the electrical equipment in the ring main unit through the ventilation holes, and sudden incoming calls after power failure also easily cause the electrical equipment to burn out to cause fire disaster, or the lightning arrester breaks down due to overlarge lightning current, so that the lightning arrester fires to cause the electrical equipment to catch fire, and once the ring main unit fires, the chain reaction is easily caused, and the damage loss is enlarged.

Disclosure of Invention

The application provides a ring main unit for photovoltaic power generation, which aims to solve the problem that the ring main unit is extremely easy to cause chain reaction and expand damage loss when being ignited.

The application provides a ring main unit for photovoltaic power generation, which adopts the following technical scheme:

the utility model provides a looped netowrk case for photovoltaic power generation, includes the box, be formed with the cavity that holds electrical equipment in the box, it is used for sealing cavity open-ended chamber door to rotate on the box, set up the gas pocket that is used for ventilating on box and the chamber door, be provided with on the cavity inner wall and be used for with the confined closed module of gas pocket opening, it is provided with the trigger piece to slide on the cavity inner wall, be provided with the lifting rope that is used for supplying to blow on the trigger piece, the closed module includes the closure subassembly, the closure subassembly is including sliding the setting on the cavity inner wall and be used for with the confined closure of gas pocket opening, it is provided with the gag lever post that is used for spacing closure to slide on the cavity inner wall, the trigger piece is used for pushing up the gag lever post and slides in order to release the spacing to the closure.

Through adopting above-mentioned technical scheme, take a breath through the gas pocket and realize cooling and humidity reduction, and when electrical equipment is on fire, make behind the blowing lifting rope trigger the piece whereabouts conflict on the gag lever post, the gag lever post receives and releases the spacing to the closure piece after contradicting, the closure piece is closed the gas pocket opening with the whereabouts, isolated outside air, make the fire unable supply of obtaining outside oxygen when burning, make its spontaneous combustion extinguish, the loss that receives when having reduced the fire, simultaneously through mechanical structure automatic triggering, the probability of the consumer of extra increase response flame has been reduced, when having realized that the gas pocket is ventilated, can also respond to confined function.

Optionally, the seal assembly is including being the collar of circumference setting on the cavity inner wall, set up on the collar and be used for supplying seal male mounting groove, set up on the mounting groove inner wall and be used for supplying the gliding spout of gag lever post, set up on the seal and be used for supplying gag lever post male spacing groove, the sliding is provided with in the spacing groove and is used for ejecting slide bar from the spacing inslot, be provided with on the slide bar tip and be used for supplying the trigger piece to contradict with the gliding first guide inclined plane of top sliding bar.

Through adopting above-mentioned technical scheme, contradict on first guide inclined plane when triggering the piece whereabouts, the direction that makes the slide bar move the spacing inslot towards moving back to the spacing groove is slided through the guide of first guide inclined plane, and the slide bar will move the gag lever post in the top and move out from the spacing groove this moment, has realized the unblock of closure, convenient and fast has realized automatic triggering unblock.

Optionally, the lifting rope extends through the air hole opening, the number of the air holes is at least three and is distributed on the inner wall of different chambers, and the sealing piece corresponds to the air holes.

Through adopting above-mentioned technical scheme, through passing through the gas pocket opening with the lifting rope for when outside flame gets into the box through the gas pocket of opening, also can burn the lifting rope and trigger the trigger piece and seal the gas pocket, reduced the probability that the outside flame was continuously burned the electrical equipment in the box and caused the loss, played the guard action to electrical equipment.

Optionally, the closed module still includes the linkage subassembly, the linkage subassembly is including rotating the inclined shaft that sets up on the cavity inner wall, be provided with two at least linkage boards on the inclined shaft, two the linkage board lateral wall is towards adjacent gag lever post respectively, set up the gangway that is used for supplying the gag lever post to run through on the linkage board, be provided with a plurality of gangways on the gag lever post, same the gangway on the gag lever post is with the linkage board clamp in the middle, the gangway is used for pushing the linkage board and makes the inclined shaft rotate.

Through adopting above-mentioned technical scheme, when the gag lever post slides and releases the locking to the closure, drive other gag lever posts through the linkage subassembly, the gag lever post slides and drives the gangbar and slide, the gangbar pushes up the gangbar, make the inclined shaft rotate, thereby drive adjacent gangbar displacement, through the adjacent gag lever post displacement of gangbar pulling, thereby release the locking of adjacent closure, make a closure trigger can trigger other closures simultaneously and totally seal the gas pocket, the linkage has been realized, make can seal a plurality of gas pockets simultaneously, when increasing the gas pocket quantity and improving ventilation efficiency, the influence to the gas pocket closing rate when catching fire has also been reduced, the lifting rope has also been increased, the quantity of trigger piece, the range of response flame has been enlarged.

Optionally, the same slide bar quantity on the closure piece is two at least, it is provided with the reaction pole to rotate on the gag lever post, same be the rotation setting between the reaction pole in the installation ring, set up in the installation ring and be used for supplying reaction groove and the sliding tray of reaction pole displacement, the sliding tray is used for supplying adjacent reaction pole junction displacement, and is adjacent the width of reaction pole junction is greater than the cross-section width of reaction groove.

Through adopting above-mentioned technical scheme, come the linkage to the closure piece of both sides through two slide bars for the linkage speed makes two gag levers slide simultaneously through the reaction pole for when pulling a gag lever post through linkage board and linkage pole, another gag lever post also can slide simultaneously, thereby releases the spacing to the closure piece completely, makes the more thorough of unblock, has further improved trigger efficiency.

Optionally, the sealing rotating shaft penetrates through the box door, the sealing rotating shaft is inserted into a limiting rod on the inner wall of the box door, an opening and closing cavity is formed in the limiting rod on the inner wall of the box door, an opening and closing magnet is arranged on the end part of the sealing rotating shaft, which is positioned in the opening and closing cavity, the linkage rod is arranged on the limiting rod in a sliding manner, the linkage rod slides into and slides out of the opening and closing cavity, a repulsive magnet is arranged on the end part of the linkage rod, adjacent repulsive magnet magnetic poles are mutually repelled, a control block is arranged in the opening and closing cavity in a sliding manner, a plurality of control magnets are embedded on the control block, the control magnets are mutually attracted with the corresponding repulsive magnet magnetic poles in an opposite manner, and the opening and closing magnet repels or attracts the control magnets to enable the control block to slide.

Through adopting above-mentioned technical scheme, come to control the gangbar through sealed pivot, when needs open the door, can rotate sealed pivot earlier and make and open and close magnet and rotate to the rejection control magnet, the control piece will slide to the position that corresponds with the gangbar under the effect of repulsion, control magnet will attract the rejection magnet this moment, make the gangbar slide into and open and close the chamber and laminate on the control piece, the gangbar has released the centre gripping to the gangbar this moment, alright open the door, convenient and fast has also strengthened the locking structure of door, the gas pocket has been closed when having reduced the conflagration, but the door is opened by the mistake and has led to the air to gush into the probability that makes the condition of a fire strengthen, the guard action has been played.

Optionally, the control panel that slides in opening and close the chamber, be provided with the control elastic component between control panel and the chamber inner wall that opens and close, the flexible pulling control panel of control elastic component along the slip direction of gag lever post, open and close magnet conflict on the control panel.

Through adopting above-mentioned technical scheme, when sealed pivot just rotates, open and close the magnet and rotate top and move control panel compression control elastic component, when the gangbar moves back into and opens and close the intracavity and has relieved the locking to the gangbar, control elastic component loses spacing and will release pressure for the gag lever post slides and withdraws from the state that runs through the gangbar, makes to release the locking between gag lever post and the gangbar completely, makes the unblock of door more thoroughly, makes to open the door more smooth and easy, has made things convenient for the door to open.

Optionally, the sealing bearing penetrates through the box door, the air hole is formed in the center of the sealing bearing, a handle used for being held by a user is arranged on the sealing bearing, and a push rod used for pushing the sealing piece open from the opening of the air hole is further arranged on the sealing bearing.

Through adopting above-mentioned technical scheme, when needs carry out manual fire extinguishing, the accessible handle rotates sealed bearing and drives the ejector pin and rotate, and the ejector pin rotates the lifting closure piece, makes the closure piece remove from the gas pocket opening part, alright insert the shower nozzle of fire extinguisher this moment and put out a fire, has reduced the probability that the fire-extinguishing that opens the door leads to the air to get into and lead to the condition of a fire to strengthen, make the dry ice of fire extinguisher when the air does not get into, carbon dioxide gets into promptly and puts out a fire, has improved fire extinguishing efficiency.

Optionally, a second guiding inclined plane is formed on the side wall of the contact between the slide bar and the limiting bar, a third guiding inclined plane is formed on the side wall of the contact between the limiting bar and the slide bar, the second guiding inclined plane is used for abutting against the side wall of the slide groove to guide the slide bar to retreat into the limiting groove, and the third guiding inclined plane is used for abutting against the sealing piece to guide the limiting bar to retreat into the slide groove.

By adopting the technical scheme, when the slide bar ejects the limit bar from the limit groove and slides out of the limit groove, the sealing piece falls down, and at the moment, the second guide inclined plane is abutted against the inner wall of the mounting ring to enable the slide bar to retreat into the limit groove, so that the probability of influencing the falling of the sealing piece due to excessive sliding-out distance of the slide bar is reduced, and the process of unlocking and falling of the sealing piece is smoother; when the ejector rod lifts the sealing piece, the third guide inclined plane of the limiting rod is abutted against the side wall of the sealing piece to enable the limiting rod to retract into the sliding groove, the probability that the portion, out of the sliding groove, of the limiting rod influences the process that the sealing piece lifts away from the air hole opening is reduced, and the process that the ejector rod lifts the sealing piece is smoother.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the loss that receives when having reduced to catch fire, simultaneously through mechanical structure automatic triggering, reduced the probability that additionally increases the consumer of response flame, when having realized that the gas pocket is ventilated, can also respond to confined function.

2. The air holes can be completely closed by triggering one sealing piece and triggering other sealing pieces at the same time, so that linkage is realized, a plurality of air holes can be simultaneously closed, the ventilation efficiency is improved by increasing the number of the air holes, the influence on the sealing speed of the air holes in the case of fire is reduced, the number of lifting ropes and triggering blocks is increased, and the range of induction flame is enlarged.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a ring main unit for photovoltaic power generation in an embodiment of the application.

Fig. 2 is a schematic view of the structure after hiding the door.

Fig. 3 is a schematic cross-sectional view taken along line A-A in fig. 2.

Fig. 4 is an enlarged schematic view of the structure at B in fig. 3.

Fig. 5 is a schematic cross-sectional view taken along line C-C of fig. 2.

Fig. 6 is an enlarged schematic view of the structure at D in fig. 3.

Fig. 7 is an enlarged schematic view of the structure at E in fig. 1.

Reference numerals illustrate: 1. a case; 11. a chamber; 12. a door; 13. air holes; 14. a directional hook; 2. a closing module; 3. a trigger block; 31. a hanging rope; 4. a closure assembly; 41. a closure; 42. a limit rod; 43. a mounting ring; 431. a mounting groove; 432. a chute; 433. installing a fence; 434. an L-shaped plate; 435. a limiting ring; 44. a limit groove; 441. a separation groove; 45. a slide bar; 451. a first guide slope; 452. a reaction rod; 453. a reaction groove; 454. a sliding groove; 5. a linkage assembly; 51. an inclined shaft; 52. a linkage plate; 53. a linkage groove; 54. a linkage rod; 6. sealing the rotating shaft; 61. opening and closing the cavity; 611. a start-stop disc; 62. opening and closing the magnet; 63. a repelling magnet; 64. a control block; 641. a control slider; 642. a control lever; 65. a control magnet; 66. a control board; 67. controlling the elastic member; 7. sealing the bearing; 71. a grip; 72. a push rod; 73. a second guide slope; 74. and a third guide slope.

Detailed Description

The application is described in further detail below with reference to fig. 1-7.

The embodiment of the application discloses a ring main unit for photovoltaic power generation. Referring to fig. 1 and 2, the ring main unit for photovoltaic power generation includes a case 1, a chamber 11 for accommodating electrical equipment is formed in the case 1, a door 12 for closing an opening of the chamber 11 is rotated on the case 1, a rotation axis of the door 12 is located on a side wall of the case 1 around an opening surface of the chamber 11, and a sealing strip made of an insulating flexible material is fixedly connected to the door 12, and the sealing strip surrounds the side wall of the case 1 around the opening surface of the chamber 11, so as to seal the opening of the chamber 11 by the door 12. The box body 1 and the box door 12 are provided with air holes 13 for ventilation, the box body 1 is in a cuboid shape, the air holes 13 are formed on three side walls of the box body 1, the side walls of the box body 1 where the box door 12 is positioned are not provided with the air holes 13, and the air holes 13 on the surface are formed on the box door 12.

Referring to fig. 1, 2 and 3, a closing module 2 for closing the opening of the air hole 13 is mounted on the inner wall of the chamber 11, four trigger blocks 3 are slid on the inner wall of the chamber 11, the four trigger blocks 3 are respectively slid on the inner wall of the three sides of the box body 1 and the inner wall of the box door 12, and the trigger blocks 3 slide along the height direction of the box body 1.

Referring to fig. 2 and 4, a lifting rope 31 for blowing is fixedly connected to the trigger block 3, the sealing module 2 comprises a sealing component 4, the sealing component 4 comprises sealing pieces 41 sliding on the inner wall of the cavity 11 and used for sealing the openings of the air holes 13, the sealing pieces 41 are in one-to-one correspondence with the trigger block 3, the sealing pieces 41 are in one-to-one correspondence with the air holes 13, a limiting rod 42 used for limiting the sealing pieces 41 is slidably arranged on the inner wall of the cavity 11, and the trigger block 3 is used for pushing the limiting rod 42 to slide so as to release the limit of the sealing pieces 41. A filter screen for filtering large-particle impurities is also arranged in the air hole 13.

Referring to fig. 2, in the present embodiment, the electrical equipment installed in the chamber 11 includes a circuit breaker mechanism, an isolation mechanism, an incoming line mechanism, an outgoing line mechanism, a transformer mechanism, a fuse protection mechanism, and the like. The incoming line mechanism is used for charging the DTU battery and then transmitting power to the transformer mechanism, and the current input by photovoltaic power generation can be increased and decreased and stabilized through the three-phase inversion DC/AC converter, and the isolation mechanism is used for isolating circuits, so that the influence among the circuits is reduced.

Referring to fig. 4, the closing assembly 4 includes a mounting ring 43 fixedly connected to the inner wall of the chamber 11 in a circumferential direction, the mounting ring 43 is composed of four mounting bars 433, and the four mounting bars 433 are respectively fixed to the three inner walls of the cabinet 1 and the inner wall of the door 12. The four mounting bars 433 are provided with mounting grooves 431 for inserting the sealing member 41, and the mounting grooves 431 extend along the height direction of the case 1. The inner walls of the two sides of the mounting groove 431 facing each other in the length direction of the mounting rail 433 are respectively provided with a sliding groove 432 for the limiting rod 42 to slide, the sliding grooves 432 are provided with a sliding groove 432 extending along the length direction of the mounting rail 433, and the limiting rod 42 slides in the sliding grooves 432 along the length direction of the mounting rail 433. The sealing member 41 is provided with a limiting groove 44 for inserting the limiting rod 42, and the limiting groove 44 extends along the length direction of the mounting rail 433. A slide bar 45 for ejecting the limit bar 42 from the limit groove 44 slides in the limit groove 44, and the slide bar 45 slides along the opening direction of the limit groove 44.

Referring to fig. 4, in this embodiment, the gravity direction is downward, and the reverse direction is positive. The sealing piece 41 is further provided with a separation groove 441, the opening of the separation groove 441 is upward, the separation groove 441 is communicated with the limiting groove 44, the separation groove 441 separates the limiting groove 44 into two sections along the length direction of the limiting groove 44, and the triggering block 3 falls into the separation groove 441. The end of the slide bar 45 in the separation groove 441 is provided with a first guiding inclined plane 451 for the trigger block 3 to collide to push the slide bar 45 to slide, the first guiding inclined planes 451 on the two slide bars 45 are both positioned in the separation groove 441, and the first guiding inclined planes 451 are far away from the opening surface of the separation groove 441 along the positions which are closer to each other.

Referring to fig. 5, the number of the sliding bars 45 on the same closure 41 is at least two, and the sliding bars 45 are in one-to-one correspondence with the limiting grooves 44. The limiting rod 42 is hinged with a reaction rod 452, and the reaction rods 452 in the same installation rail 433 are hinged with each other. A reaction groove 453 and a sliding groove 454 for the displacement of the reaction rod 452 are arranged in the mounting column 433, the arrangement direction of the sliding groove 454 is perpendicular to the arrangement direction of the limiting groove 44, and the sliding groove 454 is used for the displacement of the joint of the adjacent reaction rods 452. The cross-sectional width of the reaction groove 453 is equal to the cross-sectional width of the reaction rod 452, and the width of the connection of adjacent reaction rods 452 is greater than the cross-sectional width of the reaction groove 453, the cross-sectional width of the sliding groove 454 is equal to the width of the connection of the reaction rods 452, and the width of the connection of the connected reaction rods 452 is greater than twice the width of the reaction rods 452.

Referring to fig. 2 and 4, two L-shaped plates 434 are fixedly connected to the downward side wall of each mounting rail 433, one end of each L-shaped plate 434 is fixedly connected to the inner wall of the case 1 or the inner wall of the case door 12, the two L-shaped plates 434 limit the closure 41 that slides down in the middle, and the closure 41 slides down to close the air hole 13. And each mounting column 433 is fixedly connected with a limiting ring 435, the trigger block 3 slides in the limiting rings 435, and the limiting rings 435 limit the sliding of the trigger block 3.

Referring to fig. 2, the lifting rope 31 extends upwards from the trigger block 3 to the inner wall of the box body 1 or the inner wall of the box door 12, the inner walls of the box body 1 and the inner wall of the box door 12 are fixedly connected with the directional hooks 14, the lifting rope 31 passes through the directional hooks 14 and then extends downwards to the inner wall of the box body 1 or the inner wall of the box door 12 below the air holes 13, the lifting rope 31 passes through the extending line of the opening of the air holes 13, and the lifting rope 31 is blocked outside the sliding path of the sealing piece 41 by the L-shaped plate 434.

Referring to fig. 4, the side wall of the slide bar 45 contacting the stop bar 42 is provided with a second guiding inclined plane 73, the second guiding inclined plane 73 inclines in a downward direction at a position farther from the stop bar 42, and the second guiding inclined plane 73 is used for abutting against the side wall of the slide groove 432 to guide the slide bar 45 to retreat into the stop groove 44. The side wall of the limiting rod 42, which is in contact with the sliding rod 45, is provided with a third guiding inclined plane 74, the third guiding inclined plane 74 inclines in a downward direction along a position farther away from the sliding rod 45, and the third guiding inclined plane 74 is used for abutting against the sealing piece 41 to guide the limiting rod 42 to retreat into the sliding groove 432.

Referring to fig. 2, 5 and 6, the closed module 2 further includes a linkage assembly 5, the linkage assembly 5 includes four inclined shafts 51 rotatably connected to the inner wall of the chamber 11, the inclined shafts 51 are located at the included angle of the inner wall of the box 1 between adjacent mounting columns 433, the four inclined shafts 51 are in one-to-one correspondence with the four included angles of the inner wall of the box 1 in a cuboid shape, the length direction of the inclined shafts 51 and the inner wall of the adjacent box 1 are all in an included angle of 45 degrees, and the inclined shafts 51 are rotatably connected to the inner wall of the box 1. Two linkage plates 52 are fixedly connected to the outer side wall of the inclined shaft 51, the two linkage plates 52 are vertically arranged, and the side walls of the two linkage plates 52 face the adjacent limiting rods 42 respectively.

Referring to fig. 6, a linkage groove 53 for the penetration of the limiting rod 42 is formed in the linkage plate 52, the extending direction of the linkage groove 53 is arc-shaped, a plurality of linkage rods 54 are mounted on the end portion of the limiting rod 42 penetrating the linkage groove 53, the linkage rods 54 on the same limiting rod 42 clamp the linkage plate 52 in the middle, the distance between adjacent linkage rods 54 clamping the linkage plate 52 in the middle is larger than the thickness of the linkage plate 52, so that a space for yielding is provided for the rotation of the linkage plate 52, and the linkage rods 54 are used for pushing or pulling the linkage plate 52 to enable the inclined shaft 51 to rotate.

Referring to fig. 1 and 6, the door 12 is penetrated with a sealing rotating shaft 6, and the sealing rotating shaft 6 is inserted into a limit rod 42 on the inner wall of the door 12. Six limit rods 42 installed on the inner wall of the box body 1 are all solid, and the linkage rods 54 are all fixedly connected to the limit rods 42. And two limiting rods 42 installed on the inner wall of the box door 12 are internally provided with an opening and closing cavity 61, the opening and closing cavity 61 is extended and opened along the length direction of the limiting rods 42, the end part of the sealing rotating shaft 6 positioned in the opening and closing cavity 61 is fixedly connected with an opening and closing disc 611, and the opening and closing disc 611 rotates in the opening and closing cavity 61. Two opening and closing magnets 62 are embedded on the side wall of the outer ring of the opening and closing disk 611, the two opening and closing magnets 62 are symmetrically arranged at two ends of the opening and closing disk 611, and the magnetic poles of the two opening and closing magnets 62 facing the outside of the opening and closing disk 611 are opposite.

Referring to fig. 1 and 6, the linkage rod 54 mounted on the limit rod 42 on the inner wall of the door 12 slides telescopically on the limit rod 42, the linkage rod 54 slides into and out of the opening and closing cavity 61, the end of the linkage rod 54 in the opening and closing cavity 61 is fixedly connected with a repulsive magnet 63, the two linkage rods 54 on the same side of the limit rod 42 are in the same group, the two linkage rods 54 in the same group are fixedly connected on the same repulsive magnet 63, and the magnetic poles of the two repulsive magnets 63 in different groups face each other are the same, namely repel each other.

Referring to fig. 6, a control block 64 slides in the opening and closing cavity 61, the control block 64 includes a control slider 641 and a control rod 642, the outer side wall of the control slider 641 slides on the inner wall of the opening and closing cavity 61, the control rod 642 is fixedly connected to the end of the control slider 641 facing away from the opening and closing disk 611, a plurality of control magnets 65 are embedded on the control rod 642, the plurality of control magnets 65 are uniformly distributed in the circumferential direction, and the magnetic poles of the control magnets 65 facing the outside of the control rod 642 are opposite to the magnetic poles of the repulsive magnets 63 facing the central axis of the opening and closing cavity 61, namely, the control magnets are attracted to each other. Rotating shutter disk 611 causes shutter magnet 62 to repel or attract control magnet 65 causing control block 64 to slide.

Referring to fig. 6, a control board 66 is slid in the opening and closing cavity 61, the control board 66 and the control slider 641 are respectively located at two sides of the opening and closing disk 611, a control elastic piece 67 is fixedly connected between the control board 66 and the inner wall of the opening and closing cavity 61 facing the control board 66, two ends of the control elastic piece 67 are respectively fixedly connected on the side wall of the control board 66 and the inner wall of the opening and closing cavity 61, in this embodiment, the control elastic piece 67 adopts a spring, the length direction of the control elastic piece 67 extends along the opening direction of the opening and closing cavity 61, the control elastic piece 67 stretches and pulls the control board 66 along the sliding direction of the limiting rod 42, and the opening and closing disk 611 is propped against the control board 66.

Referring to fig. 1, 4 and 7, three sealing bearings 7 are inserted through the door 12, wherein two sealing bearings 7 are smaller in size, and the inner wall of the inner ring of the smaller sealing bearing 7 is fixedly connected to the outer side wall of the sealing rotating shaft 6. The air hole 13 is formed in the center of the seal bearing 7 with larger size, a grip 71 for holding by a user is fixedly connected to the outer side wall of the inner ring portion of the seal bearing 7 with larger size, and a push rod 72 for pushing the sealing member 41 back to the mounting groove 431 from the opening of the air hole 13 is fixedly connected to the inner side wall of the inner ring portion of the seal bearing 7 with larger size facing the inside of the box body 1.

The implementation principle of the ring main unit for photovoltaic power generation provided by the embodiment of the application is as follows: when the electrical equipment in the chamber 11 catches fire, the flame blows the lifting rope 31 to enable the trigger block 3 to slide into the separation groove 441 under the action of self gravity under the limit of the limit ring 435, the trigger block 3 is abutted against the first guide inclined plane 451 to enable the slide bar 45 to retreat into the limit groove 44, so that the limit bar 42 is ejected out of the limit groove 44, at the moment, the sealing piece 41 is unlocked and falls down, and the opening of the air hole 13 is sealed under the limit action of the L-shaped plate 434.

The limiting rod 42 slides to push the linkage plate 52 through the linkage rod 54, so that the inclined shaft 51 is driven to rotate, the inclined shaft 51 rotates to drive the other linkage plate 52 to move, the adjacent limiting rod 42 is pulled to slide through the linkage rod 54, the other limiting rod 42 is driven to slide simultaneously through the reaction rod 452, the limiting of the adjacent sealing pieces 41 is relieved, and accordingly one sealing piece 41 is triggered, and the other three sealing pieces 41 are triggered to fall to seal the air hole 13.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (6)

1. The utility model provides a looped netowrk case for photovoltaic power generation, includes box (1), be formed with cavity (11) that hold electrical equipment in box (1), it has chamber (11) open-ended chamber door (12) to rotate on box (1), set up on box (1) and chamber door (12) and be used for ventilative gas pocket (13), its characterized in that: the sealing device comprises a cavity (11), and is characterized in that a sealing module (2) for sealing an opening of the air hole (13) is arranged on the inner wall of the cavity (11), a trigger block (3) is slidably arranged on the inner wall of the cavity (11), a lifting rope (31) for blowing is arranged on the trigger block (3), the sealing module (2) comprises a sealing component (4), the sealing component (4) comprises a sealing piece (41) which is slidably arranged on the inner wall of the cavity (11) and is used for sealing the opening of the air hole (13), a limiting rod (42) for limiting the sealing piece (41) is slidably arranged on the inner wall of the cavity (11), and the trigger block (3) is used for pushing the limiting rod (42) to slide so as to release the limit of the sealing piece (41);

the sealing assembly (4) comprises a mounting ring (43) circumferentially arranged on the inner wall of the cavity (11), a mounting groove (431) for inserting a sealing piece (41) is formed in the mounting ring (43), a sliding groove (432) for sliding a limiting rod (42) is formed in the inner wall of the mounting groove (431), a limiting groove (44) for inserting the limiting rod (42) is formed in the sealing piece (41), a sliding rod (45) for ejecting the limiting rod (42) from the limiting groove (44) is arranged in the limiting groove (44) in a sliding mode, and a first guide inclined surface (451) for enabling a trigger block (3) to collide to slide on the end portion of the sliding rod (45) is arranged on the end portion of the sliding rod (45);

the lifting ropes (31) extend through openings of the air holes (13), the number of the air holes (13) is at least three and the air holes are distributed on the inner walls of different chambers (11), and the sealing pieces (41) correspond to the air holes (13);

the sealing module (2) further comprises a linkage assembly (5), the linkage assembly (5) comprises an inclined shaft (51) which is rotatably arranged on the inner wall of the cavity (11), at least two linkage plates (52) are arranged on the inclined shaft (51), the side walls of the linkage plates (52) face adjacent limiting rods (42) respectively, linkage grooves (53) which are used for the limiting rods (42) to penetrate through are formed in the linkage plates (52), a plurality of linkage rods (54) are arranged on the limiting rods (42), the same linkage rods (54) on the limiting rods (42) clamp the linkage plates (52) in the middle, and the linkage rods (54) are used for pushing the linkage plates (52) to rotate the inclined shaft (51).

2. The ring main unit for photovoltaic power generation according to claim 1, wherein: the number of the sliding rods (45) on the same sealing piece (41) is at least two, the limiting rods (42) are rotatably provided with reaction rods (452), the same reaction rods (452) in the mounting ring (43) are rotatably arranged, reaction grooves (453) and sliding grooves (454) for the displacement of the reaction rods (452) are formed in the mounting ring (43), the sliding grooves (454) are used for the displacement of the connecting parts of the adjacent reaction rods (452), and the width of the connecting parts of the adjacent reaction rods (452) is larger than the section width of the reaction grooves (453).

3. The ring main unit for photovoltaic power generation according to claim 1, wherein: the sealing rotary shaft (6) penetrates through the box door (12), the sealing rotary shaft (6) is inserted into a limit rod (42) on the inner wall of the box door (12), an opening and closing cavity (61) is formed in the limit rod (42) on the inner wall of the box door (12), an opening and closing magnet (62) is arranged on the end part of the sealing rotary shaft (6) in the opening and closing cavity (61), a linkage rod (54) is arranged on the limit rod (42) in a sliding mode, the linkage rod (54) slides into the opening and closing cavity (61), a repulsive magnet (63) is arranged on the end part of the linkage rod (54), the magnetic poles of the repulsive magnets (63) are the same and repel each other, a control block (64) is arranged in the opening and closing cavity (61), a plurality of control magnets (65) are embedded in the control block (64), the control magnets (65) and the corresponding repulsive magnets (63) are attracted with each other in opposite magnetic poles, and the control magnets (65) are rotated to repel or attract each other so that the control block (64) slides to be opened and closed.

4. A ring main unit for photovoltaic power generation according to claim 3, characterized in that: control panel (66) is slided in opening and close chamber (61), be provided with control elastic component (67) between control panel (66) and the inner wall of opening and close chamber (61), flexible pulling control panel (66) of the slip direction along gag lever post (42) of control elastic component (67), open and close magnet (62) conflict on control panel (66).

5. The ring main unit for photovoltaic power generation according to claim 1, wherein: the sealing device is characterized in that a sealing bearing (7) is inserted and embedded in the box door (12), the air hole (13) is formed in the center of the sealing bearing (7), a handle (71) used for a user to hold is arranged on the sealing bearing (7), and a push rod (72) used for pushing the sealing piece (41) out of the opening of the air hole (13) is further arranged on the sealing bearing (7).

6. The ring main unit for photovoltaic power generation according to claim 5, wherein: the side wall of the sliding rod (45) contacted with the limiting rod (42) is provided with a second guide inclined plane (73), the side wall of the limiting rod (42) contacted with the sliding rod (45) is provided with a third guide inclined plane (74), the second guide inclined plane (73) is used for guiding the sliding rod (45) to retreat into the limiting groove (44) in a manner of being in contact with the side wall of the sliding groove (432), and the third guide inclined plane (74) is used for guiding the limiting rod (42) to retreat into the sliding groove (432) in a manner of being in contact with the sealing piece (41).