阅读说明：本技术 光伏防雷装置 (Photovoltaic lightning protection device ) 是由 朱云超 冯慧 于 2021-08-26 设计创作，主要内容包括：本发明公开了一种光伏防雷装置,包括光伏防雷汇流箱,光伏防雷汇流箱的底部设置有穿线机构,穿线机构包括穿线筒,穿线筒固定安装于光伏防雷汇流箱的底端；本发明通过穿线筒使线缆能从光伏防雷汇流箱的底壁穿入光伏防雷汇流箱内,穿线时封板通过传动机构驱动密封球旋转,使密封球上的穿线孔与穿线筒相连通,使得线缆的顶端穿过穿线孔进入光伏防雷汇流箱内,穿线筒内没有线缆时,密封球内的穿线孔处于水平状态,使得穿线孔不与穿线筒相连通,从而使穿线筒的顶端封闭,同时,封板也处于封闭状态,从而使穿线筒的底端封闭,保证了穿线筒的密封性,防止灰尘进入光伏防雷汇流箱内,且穿线筒的封闭和开启不需要人为操控,便于使用。(The invention discloses a photovoltaic lightning protection device, which comprises a photovoltaic lightning protection combiner box, wherein a threading mechanism is arranged at the bottom of the photovoltaic lightning protection combiner box, the threading mechanism comprises a threading cylinder, and the threading cylinder is fixedly arranged at the bottom end of the photovoltaic lightning protection combiner box; according to the photovoltaic lightning protection combiner box, a cable can penetrate into the photovoltaic lightning protection combiner box from the bottom wall of the photovoltaic lightning protection combiner box through the threading cylinder, the sealing plate drives the sealing ball to rotate through the transmission mechanism during threading, so that the threading hole in the sealing ball is communicated with the threading cylinder, the top end of the cable penetrates through the threading hole to enter the photovoltaic lightning protection combiner box, when no cable exists in the threading cylinder, the threading hole in the sealing ball is in a horizontal state, the threading hole is not communicated with the threading cylinder, the top end of the threading cylinder is sealed, meanwhile, the sealing plate is also in a sealed state, the bottom end of the threading cylinder is sealed, the sealing performance of the threading cylinder is guaranteed, dust is prevented from entering the photovoltaic lightning protection combiner box, manual control is not needed for sealing and opening of the threading cylinder, and the photovoltaic lightning protection combiner box is convenient to use.)

1. The utility model provides a photovoltaic lightning protection device, includes photovoltaic lightning protection combiner box, its characterized in that: the bottom of photovoltaic lightning combiner box is provided with threading mechanism, threading mechanism is including a threading section of thick bamboo, a threading section of thick bamboo fixed mounting is in the bottom of photovoltaic lightning combiner box, a threading section of thick bamboo communicates with photovoltaic lightning combiner box mutually, the top of a threading section of thick bamboo is provided with the ball sealer, the through wires hole has been seted up on the ball sealer, the ball sealer with a threading section of thick bamboo normal running fit, the bottom of a threading section of thick bamboo is provided with the shrouding, be provided with drive mechanism on the threading section of thick bamboo, when the bottom opening that the shrouding will a threading section of thick bamboo seals, the through wires hole on the ball sealer is not communicated with a threading section of thick bamboo, and when the shrouding moved towards the ball sealer, the shrouding passed through drive mechanism and drives the ball sealer rotatory, made the through wires hole on the ball be linked together with a threading section of thick bamboo.

2. The photovoltaic lightning protection device of claim 1, wherein: threading section of thick bamboo includes urceolus and inner tube, the top of urceolus with the diapire fixed connection of photovoltaic lightning protection combiner box, inner tube fixed mounting is in the inside of urceolus, the bottom of inner tube is provided with the seal port, the shrouding is provided with two, two the shrouding is all rotated and is installed in the bottom of seal port inner chamber.

3. The photovoltaic lightning protection device of claim 2, wherein: the shrouding passes through the hinge rotation to be installed in the bottom of seal port inner chamber, and two the shrouding uses the axle center of a support section of thick bamboo to set up as symmetry center symmetry, two the equal fixed mounting of relative lateral wall of shrouding has the sealing strip, two the sealing strip activity offsets.

4. The photovoltaic lightning protection device according to claim 2 or 3, characterized in that: the threading mechanism further comprises a supporting cylinder, the supporting cylinder is fixedly installed at the top end of the threading cylinder, a pin shaft is fixedly installed on the outer wall of the sealing ball, and the sealing ball is rotatably installed in the supporting cylinder through the pin shaft.

5. The photovoltaic lightning protection device of claim 4, wherein: the inner wall of the bottom of the sealing opening protrudes towards the inside of the sealing opening to form a flange, a groove is formed in the top end of the flange, a spring is fixedly installed in the groove, and the top end of the spring is fixedly connected with the sealing plate.

6. The photovoltaic lightning protection device of claim 5, wherein: the driving mechanism comprises a rope winding wheel and a traction rope, the rope winding wheel is fixedly installed at one end, away from the sealing ball, of the pin shaft, the rope winding wheel is arranged inside the supporting cylinder, a torsion spring is sleeved on the pin shaft, one end of the traction rope is fixedly connected with the top wall of the sealing plate, and the other end of the traction rope is fixedly connected with the rope winding wheel.

7. The photovoltaic lightning protection device of claim 6, wherein: the inside fixed mounting of sealed ball has sealed bag, sealed bag sets up to the annular, sealed bag with the through wires hole is coaxial setting.

8. The photovoltaic lightning protection device of claim 7, wherein: be provided with the cavity between urceolus and the inner tube, fixed mounting has the cylinder body in the cavity, the inner chamber slidable mounting of cylinder body has the piston, the top fixed mounting of piston has the gag lever post, the top fixedly connected with of gag lever post connects the rope, connect the rope keep away from the gag lever post one end with haulage rope fixed connection, the bottom intercommunication of cylinder body has the gas-supply pipe, the gas-supply pipe keep away from the cylinder body one end with the sealed bag is linked together.

Technical Field

The invention relates to the technical field of photovoltaic lightning protection, in particular to a photovoltaic lightning protection device.

Background

In a solar photovoltaic power generation system, a junction box is used in order to reduce the wiring between a solar photovoltaic cell array and an inverter. And various open-number combiner boxes are developed by combining the design experience of the lightning protection system for many years. The user can establish ties certain quantity, the same photovoltaic cell of specification, constitutes individual photovoltaic array, then parallelly connected the photovoltaic lightning protection case that converges with a plurality of photovoltaic array, converges the back in the photovoltaic lightning protection conflux case, thereby through controller, direct current switch board, photovoltaic inverter, AC distribution cabinet, thereby supporting use constitutes complete photovoltaic power generation system, realizes being incorporated into the power networks with the commercial power. In order to improve the reliability and the practicability of the system, a special photovoltaic direct-current lightning protection module, a direct-current fuse, a circuit breaker and the like are configured in the photovoltaic lightning protection header box, so that a user can conveniently and accurately master the working condition of a photovoltaic battery in time, and the solar photovoltaic power generation system is ensured to exert the maximum efficacy.

The Chinese invention patent CN110048672A discloses an intelligent photovoltaic lightning-protection combiner box, which comprises a box body, wherein two groups of two rows of five columns of auxiliary wiring pipelines are symmetrically arranged on the bottom surface of the box body, a rectangular strip is arranged between every two rows of auxiliary wiring pipelines, the rectangular strip is fixed on the bottom surface of the box body through welding, five integrated rotary rods are uniformly arranged on the bottom surface of the rectangular strip, the surface of each rotary rod is sleeved with a connecting strip, the top end of each connecting strip is provided with an integrated seal cover, and the seal cover is fixed on the bottom end surface of one of the auxiliary wiring pipelines through clamping; through setting up the closing cap for partly be in the vice wiring pipeline bottom of idle standby state can be sealed, thereby improves the whole seal of box, has avoided some external foreign matter to probably get into the inside problem of box through vice wiring pipeline, and with the closing cap setting between two lines of vice wiring pipelines, can effectually save the cost that sets up of closing cap.

When this photovoltaic lightning protection collection flow box need seal the pipeline of working a telephone switchboard, need stir the closing cap, make the closing cap seal the bottom of pipeline of working a telephone switchboard to prevent that external foreign matter from getting into the inside problem of box through the pipeline of working a telephone switchboard, but it needs the manual work to stir the closing cap and seal, if forget to stir the closing cap, then external foreign matter can get into inside the box through the pipeline of working a telephone switchboard, make the inside electrical components of box damage, be not convenient for use.

Therefore, it is necessary to provide a photovoltaic lightning protection device to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a photovoltaic lightning protection device, which solves the problem that the existing photovoltaic lightning protection device in the background technology cannot be automatically closed when a cable is not connected into a wiring pipeline.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a photovoltaic lightning protection device, includes photovoltaic lightning protection combiner box, the bottom of photovoltaic lightning protection combiner box is provided with threading mechanism, threading mechanism is including a threading section of thick bamboo, a threading section of thick bamboo fixed mounting is in the bottom of photovoltaic lightning protection combiner box, a threading section of thick bamboo communicates with photovoltaic lightning protection combiner box mutually, the top of a threading section of thick bamboo is provided with the ball sealer, the through wires hole has been seted up on the ball sealer, the ball sealer with a threading section of thick bamboo normal running fit, the bottom of a threading section of thick bamboo is provided with the shrouding, be provided with drive mechanism on the threading section of thick bamboo, when the shrouding will the bottom opening of a threading section of thick bamboo seals, and the through wires hole on the ball sealer does not communicate with a threading section of thick bamboo, and when the shrouding moved towards the ball sealer, the shrouding passed through drive mechanism and drives the ball sealer rotation, makes the through wires hole on the ball sealer be linked together with a threading section of thick bamboo.

When the photovoltaic lightning protection combiner box is used specifically, the cable can penetrate into the photovoltaic lightning protection combiner box from the bottom wall of the photovoltaic lightning protection combiner box through the threading barrel, during threading, the sealing plate is pushed open at the top end of the cable, the sealing plate moves towards the sealing ball, the sealing ball is driven to rotate through the transmission mechanism, the threading hole in the sealing ball is communicated with the threading barrel, the top end of the cable penetrates through the threading hole to enter the photovoltaic lightning protection combiner box, when the cable does not exist in the threading barrel, the threading hole in the sealing ball is in a horizontal state, the threading hole is not communicated with the threading barrel, the top end of the threading barrel is sealed, the sealing plate is also in a sealed state, the bottom end of the threading barrel is sealed, the sealing performance of the threading barrel is guaranteed, dust is prevented from entering the photovoltaic lightning protection combiner box, manual control and manual control over the sealing and opening of the threading barrel are not needed, and the photovoltaic lightning protection combiner box is convenient to use.

As a further scheme of the invention, the threading cylinder comprises an outer cylinder and an inner cylinder, the top end of the outer cylinder is fixedly connected with the bottom wall of the photovoltaic lightning protection combiner box, the inner cylinder is fixedly installed inside the outer cylinder, the bottom of the inner cylinder is provided with a sealing opening, the number of the sealing plates is two, and the two sealing plates are both rotatably installed at the bottom of the inner cavity of the sealing opening.

During the specific use, insert the cable from the below of sealing port during the threading, the top of cable backs down the shrouding, makes the shrouding remove towards the ball sealer, makes the inner tube protected inside the urceolus through setting up of urceolus for the hole of seting up on the inner tube section of thick bamboo wall does not communicate with the external world, has avoided external dust to get into in the inner tube.

As a further scheme of the invention, the sealing plates are rotatably mounted at the bottom of the inner cavity of the sealing port through hinges, the two sealing plates are symmetrically arranged by taking the axis of the supporting cylinder as a symmetric center, the opposite side walls of the two sealing plates are fixedly provided with sealing strips, and the two sealing strips are movably abutted.

During the specific use, can seal the bottom of sealing port through the shrouding, seal the position of offseting of two shroudings through the sealing strip.

As a further scheme of the invention, the threading mechanism further comprises a supporting cylinder, the supporting cylinder is fixedly arranged at the top end of the threading cylinder, a pin shaft is fixedly arranged on the outer wall of the sealing ball, and the sealing ball is rotatably arranged in the supporting cylinder through the pin shaft.

During the concrete use, under the effect of round pin axle, the sealed ball can support a section of thick bamboo rotation relatively, and when the through wires hole in the sealed ball was in vertical state, the through wires hole was linked together with a threading section of thick bamboo, and when the through wires hole in the sealed ball was in the horizontal condition, the through wires hole was not linked together with a threading section of thick bamboo.

As a further scheme of the invention, a flange is formed by protruding the inner wall of the bottom of the sealing opening towards the inside of the sealing opening, a groove is formed at the top end of the flange, a spring is fixedly installed in the groove, and the top end of the spring is fixedly connected with the sealing plate.

When the sealing device is used specifically, after the cable is pulled out of the inner cylinder, the sealing plate rotates downwards under the action of the spring and abuts against the flange, so that the bottom of the sealing opening is sealed.

As a further scheme of the invention, the transmission mechanism comprises a rope winding wheel and a traction rope, the rope winding wheel is fixedly mounted at one end of the pin shaft, which is far away from the sealing ball, the rope winding wheel is arranged inside the supporting cylinder, a torsion spring is sleeved on the pin shaft, one end of the traction rope is fixedly connected with the top wall of the sealing plate, and the other end of the traction rope is fixedly connected with the rope winding wheel.

When the cable winding device is used, a cable is inserted from the lower part of a sealing opening during threading, the sealing plate is pushed open by the top end of the cable to move towards the sealing ball, the traction rope is gradually loosened when the sealing plate moves towards the sealing ball, the pin shaft rotates under the action of the torsional spring to drive the rope winding wheel to rotate, so that the top end of the traction rope is gradually wound on the rope winding wheel, meanwhile, the pin shaft drives the sealing ball to rotate, a threading hole formed in the sealing ball is communicated with the inner cylinder, so that the top end of the cable can penetrate through the threading hole and extend into the photovoltaic lightning protection combiner box, after the cable is pulled out of the inner cylinder, the sealing plate rotates downwards under the action of the spring and is propped against the flange, so that the bottom of the sealing opening is sealed, meanwhile, the traction rope is pulled when the sealing is rotated downwards, the top end of the traction rope pulls the rope winding wheel to rotate reversely, so that the traction rope is pulled out, and the pin shaft is driven to rotate reversely when the rope winding wheel rotates reversely, thereby drive the sealed ball counter-rotation, make the through wires hole on the sealed ball not be linked together with the inner tube to make the top of inner tube seal, guaranteed the leakproofness of a threading section of thick bamboo, prevent that the dust from getting into in the photovoltaic lightning protection collection flow box.

As a further scheme of the invention, a sealing bag is fixedly arranged in the sealing ball, the sealing bag is annular, and the sealing bag and the threading hole are coaxially arranged.

When the sealing bag is used specifically, the gap between the cable and the sealing ball can be sealed through the sealing bag.

As a further scheme of the invention, a cavity is arranged between the outer cylinder and the inner cylinder, a cylinder body is fixedly arranged in the cavity, a piston is slidably arranged in the inner cavity of the cylinder body, a plug rod is fixedly arranged at the top end of the piston, a connecting rope is fixedly connected to the top end of the plug rod, one end of the connecting rope, far away from the plug rod, is fixedly connected with the traction rope, a gas pipe is communicated with the bottom end of the cylinder body, and one end of the gas pipe, far away from the cylinder body, is communicated with the sealing bag.

During specific use, because the diameter of cable is different, when the cable diameter is great, the cable is difficult to pass from the sealed bag, therefore, when the cable inserts the inner tube, the cable struts the shrouding, the shrouding upwards rotates, haulage rope rebound, it drives the gag lever post rebound to pass through the connection rope during haulage rope rebound, drive piston rebound during gag lever post rebound, thereby make the gas in the sealed bag pass through in the gas-supply pipe gets into the cylinder body, thereby make the through-hole aperture increase at sealed bag middle part, the diameter of cable is big more, shrouding pivoted angle is big more, haulage rope rebound's distance is big more, it is big more to connect the rope to pass through the gag lever post and drive piston rebound's distance, the sealed bag passes through the gas of gas-supply pipe input cylinder body more, the through-hole aperture at sealed bag middle part is big more, the thick cable of being convenient for passes this through-hole.

The working principle is as follows: during threading, a cable is inserted from the lower part of the sealing opening, the sealing plate is pushed open by the top end of the cable to move towards the sealing ball, when the sealing plate moves towards the sealing ball, the traction rope gradually loosens, the pin shaft rotates under the action of the torsional spring to drive the rope winding wheel to rotate, so that the top end of the traction rope is gradually wound on the rope winding wheel, meanwhile, the pin shaft drives the sealing ball to rotate, so that the threading hole formed in the sealing ball is communicated with the inner cylinder, so that the top end of the cable can penetrate through the threading hole and extend into the photovoltaic lightning protection combiner box, after the cable is pulled out of the inner cylinder, the sealing plate rotates downwards under the action of the spring and is propped against the flange, so that the bottom of the sealing opening is sealed, meanwhile, the traction rope is pulled when the sealing is rotated downwards, the top end of the traction rope pulls the rope winding wheel to rotate reversely, so that the traction rope is discharged, and the pin shaft is driven to rotate reversely when the rope winding wheel rotates reversely, thereby driving the sealing ball to rotate reversely, leading the threading hole on the sealing ball not to be communicated with the inner cylinder, leading the top end of the inner cylinder to be sealed, ensuring the sealing performance of the threading cylinder, preventing dust from entering the photovoltaic lightning protection header box, sealing the gap between the cable and the sealing ball through the sealing bag, because of the difference of the diameters of the cables, when the diameter of the cable is larger, the cable is difficult to pass through the sealing bag, therefore, when the cable is inserted into the inner cylinder, the cable props the sealing plate, the sealing plate rotates upwards, the traction rope moves upwards, when the traction rope moves upwards, the connecting rope drives the plug rod to move upwards, when the plug rod moves upwards, the piston is driven to move upwards, thereby leading the gas in the sealing bag to enter the cylinder body through the gas pipe, leading the aperture of the through hole in the middle part of the sealing bag to be increased, the diameter of the cable is larger, the larger the rotating angle of the sealing plate is larger, the distance of the upward movement of the traction rope is larger, the distance that the connecting rope passes through the gag lever post and drives piston rebound is big more, and the sealed bag passes through the gas that the gas-supply pipe input cylinder body more, and the through-hole aperture at sealed bag middle part is big more, and the thick cable of being convenient for passes this through-hole.

The invention relates to a photovoltaic lightning protection device, wherein a cable can penetrate into a photovoltaic lightning protection header box from the bottom wall of the photovoltaic lightning protection header box through a threading cylinder, a sealing plate is pushed open by the top end of the cable during threading to move the sealing plate towards a sealing ball, the sealing plate drives the sealing ball to rotate through a transmission mechanism when moving towards the sealing ball, so that a threading hole on the sealing ball is communicated with the threading cylinder, the top end of the cable penetrates through the threading hole to enter the photovoltaic lightning protection header box, when no cable exists in the threading cylinder, the threading hole in the sealing ball is in a horizontal state, so that the threading hole is not communicated with the threading cylinder, the top end of the threading cylinder is sealed, meanwhile, the sealing plate is also in a sealed state, the bottom end of the threading cylinder is sealed, the sealing performance of the threading cylinder is ensured, dust is prevented from entering the photovoltaic lightning protection header box, and the sealing and the opening of the threading cylinder do not need to be manually controlled, is convenient for use.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic three-dimensional structure of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic front sectional view of the present invention;

FIG. 4 is a schematic sectional view of the threading mechanism of the present invention;

FIG. 5 is an enlarged schematic view of FIG. 4 at A;

FIG. 6 is a schematic view of the enlarged mechanism of FIG. 4 at B;

FIG. 7 is a schematic view of the mounting arrangement of the sealing ball and support cartridge of the present invention;

FIG. 8 is a schematic sectional view of the cylinder of the present invention;

FIG. 9 is a schematic three-dimensional structure of a sealing ball of the present invention;

FIG. 10 is a side view of the sealing ball of the present invention.

In the figure: 1. a photovoltaic lightning protection combiner box; 2. an outer cylinder; 3. an inner barrel; 4. sealing the opening; 401. a flange; 5. a support cylinder; 6. a sealing ball; 7. closing the plate; 8. a hauling rope; 9. a pin shaft; 10. a rope winding wheel; 11. a torsion spring; 12. a spring; 13. a seal ring; 14. a sealing strip; 15. a hinge; 16. sealing the bag; 17. a gas delivery pipe; 18. a cylinder body; 19. a piston; 20. a stopper rod; 21. and connecting ropes.

Detailed Description

As shown in fig. 1 to 6, a photovoltaic lightning protection device comprises a photovoltaic lightning protection combiner box 1, wherein a threading mechanism is arranged at the bottom of the photovoltaic lightning protection combiner box 1, the threading mechanism comprises a threading cylinder, the threading cylinder is fixedly arranged at the bottom end of the photovoltaic lightning protection combiner box 1, the threading cylinder is communicated with the photovoltaic lightning protection combiner box 1, a sealing ball 6 is arranged at the top end of the threading cylinder, a threading hole is formed in the sealing ball 6, the sealing ball 6 is in rotating fit with the threading cylinder, a sealing plate 7 is arranged at the bottom end of the threading cylinder, a transmission mechanism is arranged on the threading cylinder, when the sealing plate 7 seals the bottom opening of the threading cylinder, the threading hole in the sealing ball 6 is not communicated with the threading cylinder, when the sealing plate 7 moves towards the sealing ball 6, the sealing plate 7 drives the sealing ball 6 to rotate through the transmission mechanism, so that the threading hole in the sealing ball 6 is communicated with the threading cylinder, the outer wall of ball sealer 6 closely laminates with the roof of a threading section of thick bamboo, and the roof of a threading section of thick bamboo is provided with the arc limit of laminating mutually with ball sealer 6 to the area of contact of increase ball sealer 6 and a threading section of thick bamboo, thereby improve the leakproofness of laminating department.

When the cable threading device is used specifically, a cable can penetrate into the photovoltaic lightning protection combiner box 1 from the bottom wall of the photovoltaic lightning protection combiner box 1 through the threading cylinder so as to electrically connect the cable with electrical components in the photovoltaic lightning protection combiner box 1, the sealing plate 7 is pushed open at the top end of the cable so as to move the sealing plate 7 towards the sealing ball 6, when the sealing plate 7 moves towards the sealing ball 6, the sealing ball 6 is driven to rotate by the sealing plate 7 through the transmission mechanism so as to communicate the threading hole on the sealing ball 6 with the threading cylinder, so that the top end of the cable penetrates through the threading hole to enter the photovoltaic lightning protection combiner box 1, when no cable exists in the threading cylinder, the threading hole in the sealing ball 6 is in a horizontal state, so that the threading hole is not communicated with the threading cylinder, the top end of the threading cylinder is sealed, meanwhile, the sealing plate 7 is also in a sealed state, so that the bottom end of the threading cylinder is sealed, the sealing performance of the threading cylinder is ensured, and dust is prevented from entering the photovoltaic lightning protection combiner box 1, the problem of dust absorption lead to the electric elements radiating effect not good on the electric elements is avoided, and the threading section of thick bamboo seal with open need not artificially control, convenient to use.

As shown in fig. 3 to 10, the threading cylinder includes an outer cylinder 2 and an inner cylinder 3, the top end of the outer cylinder 2 is fixedly connected with the bottom wall of the photovoltaic lightning protection combiner box 1, the inner cylinder 3 is fixedly installed inside the outer cylinder 2, the inner cylinder 3 is protected inside the outer cylinder 2 through the arrangement of the outer cylinder 2, a hole formed in the cylinder wall of the inner cylinder 3 is not communicated with the outside, external dust is prevented from entering the inner cylinder 3, a sealing opening 4 is formed in the bottom of the inner cylinder 3, the inner diameter of the sealing opening 4 is gradually reduced from bottom to top, so that an opening between two sealing plates 7 is larger, a cable can be conveniently inserted into the sealing opening 4, the two sealing plates 7 are semicircular, when the two sealing plates 7 are combined into a circle, the bottom of the sealing opening 4 is just sealed, and the two sealing plates 7 are both rotatably installed at the bottom of the inner cavity of the sealing opening 4; the threading mechanism further comprises a supporting cylinder 5, the supporting cylinder 5 is fixedly arranged at the top end of the threading cylinder, two pin shafts 9 are fixedly arranged on the outer wall of the sealing ball 6, the two pin shafts 9 are symmetrically arranged by taking the ball center of the sealing ball 6 as a symmetric center, and the sealing ball 6 is rotatably arranged in the supporting cylinder 5 through the pin shafts 9; a flange 401 is formed by the inner wall of the bottom of the sealing opening 4 protruding towards the inside of the sealing opening 4, a groove is formed in the top end of the flange 401, a spring 12 is fixedly installed in the groove, the spring 12 is always in a stretching state, the top end of the spring 12 is fixedly connected with the sealing plate 7, a sealing ring 13 is fixedly installed at the top end of the flange 401, a gap between the sealing plate 7 and the flange 401 is sealed through the sealing ring 13, and dust is prevented from entering the inner cylinder 3 through the gap between the sealing plate 7 and the flange 401; the driving mechanism comprises a rope winding wheel 10 and a traction rope 8, the rope winding wheel 10 is fixedly installed at one end, far away from the sealing ball 6, of the pin shaft 9, the rope winding wheel 10 is arranged inside the supporting cylinder 5, a torsion spring 11 is sleeved on the pin shaft 9, the torsion spring 11 enables the pin shaft 9 to be stressed and rotated, external force is removed to reset, one end of the traction rope 8 is fixedly connected with the top wall of the sealing plate 7, and the other end of the traction rope 8 sequentially penetrates through the side wall of the sealing opening 4, the bottom wall of the photovoltaic lightning protection header box 1 and the bottom wall of the supporting cylinder 5 to be fixedly connected with the rope winding wheel 10; shrouding 7 rotates through hinge 15 to be installed in the bottom of 4 inner chambers of seal port, and two shrouding 7 uses the axle center of a support section of thick bamboo 5 to set up as symmetry center symmetry, two the equal fixed mounting of relative lateral wall of shrouding 7 has sealing strip 14, two sealing strip 14 activity offsets, seals two shrouding 7's offset position through sealing strip 14, prevents that the dust from getting into inner tube 3 from the clearance department between two shrouding 7.

When the cable is used, during threading, a cable is inserted from the lower part of the sealing opening 4, the sealing plate 7 is pushed open at the top end of the cable, the sealing plate 7 moves towards the sealing ball 6, when the sealing plate 7 moves towards the sealing ball 6, the traction rope 8 gradually relaxes, the pin shaft 9 rotates under the action of the torsion spring 11, so that the rope winding wheel 10 is driven to rotate, the top end of the traction rope 8 is gradually wound on the rope winding wheel 10, meanwhile, the pin shaft 9 drives the sealing ball 6 to rotate, so that the threading hole formed in the sealing ball 6 is communicated with the inner cylinder 3, so that the top end of the cable can penetrate through the threading hole and extend into the photovoltaic lightning protection combiner box 1, after the cable is pulled out of the inner cylinder 3, the sealing plate 7 rotates downwards under the action of the spring 12 and abuts against the flange 401, so that the bottom of the sealing opening 4 is sealed, meanwhile, the traction rope 8 is pulled when the cable rotates downwards, the top end of the traction rope winding wheel 8 is pulled to rotate reversely, thereby emit haulage rope 8, drive round pin axle 9 antiport when rope sheave 10 antiport to drive sealed ball 6 antiport, make the through wires hole on the sealed ball 6 not be linked together with inner tube 3, thereby make the top of inner tube 3 seal, guaranteed the leakproofness of a threading section of thick bamboo, prevent that the dust from getting into in the photovoltaic lightning protection collection flow box 1.

As shown in fig. 4 to 8, a sealing bag 16 is fixedly installed inside the sealing ball 6, the sealing bag 16 is annular, a circular hole for a cable to pass through is formed in the middle of the sealing bag 16, and the sealing bag 16 and the threading hole are coaxially arranged; be provided with the cavity between urceolus 2 and the inner tube 3, fixed mounting has cylinder body 18 in the cavity, the inner chamber slidable mounting of cylinder body 18 has piston 19, the top fixed mounting of piston 19 has gag lever post 20, the top fixedly connected with of gag lever post 20 connects rope 21, the one end that gag lever post 20 was kept away from to connecting rope 21 with 8 fixed connection of haulage rope, the bottom intercommunication of cylinder body 18 has gas-supply pipe 17, the one end that cylinder body 18 was kept away from to gas-supply pipe 17 run through the diapire of photovoltaic lightning combiner box 1 and the outer wall of sealing ball 6 in proper order with the sealing bag 16 is linked together.

When the sealing device is used specifically, the gap between the cable and the sealing ball 6 can be sealed through the sealing bag 16, because the diameter of the cable is different, when the diameter of the cable is larger, the cable is difficult to penetrate through the sealing bag 16, therefore, when the cable is inserted into the inner barrel 3, the cable props the sealing plate 7, the sealing plate 7 rotates upwards, the hauling rope 8 moves upwards, the connecting rope 21 drives the plug rod 20 to move upwards, the plug rod 20 moves upwards, the piston 19 is driven to move upwards, so that the gas in the sealing bag 16 enters the cylinder body 18 through the gas pipe 17, the aperture of the through hole in the middle of the sealing bag 16 is increased, the larger the rotating angle of the sealing plate 7 is, the larger the upward moving distance of the hauling rope 8 is, the larger the upward moving distance of the connecting rope 21 drives the piston 19 to move upwards through the plug rod 20 is, the more gas is input into the cylinder body 18 through the gas pipe 17 by the sealing bag 16, the larger the aperture of the through hole in the middle of the capsule 16, the easier it is for a thicker cable to pass through the through hole.

The working principle is as follows: during threading, a cable is inserted from the lower part of the sealing opening 4, the sealing plate 7 is pushed open at the top end of the cable, the sealing plate 7 moves towards the sealing ball 6, when the sealing plate 7 moves towards the sealing ball 6, the traction rope 8 is gradually loosened, the pin shaft 9 rotates under the action of the torsion spring 11, so as to drive the rope winding wheel 10 to rotate, the top end of the traction rope 8 is gradually wound on the rope winding wheel 10, meanwhile, the pin shaft 9 drives the sealing ball 6 to rotate, so that the threading hole formed in the sealing ball 6 is communicated with the inner cylinder 3, so that the top end of the cable can penetrate through the threading hole and extend into the photovoltaic convergence box 1, after the cable is pulled out of the inner cylinder 3, the sealing plate 7 rotates downwards under the action of the spring 12 and is abutted against the flange 401, so as to seal the bottom of the sealing opening 4, meanwhile, the traction rope 8 is pulled when the sealing downwards rotates, the top end of the traction rope 8 pulls the rope winding wheel 10 to reversely rotate, thereby paying out the hauling cable 8, driving the pin shaft 9 to rotate reversely when the rope winding wheel 10 rotates reversely, thereby driving the sealing ball 6 to rotate reversely, leading the threading hole on the sealing ball 6 not to be communicated with the inner cylinder 3, thereby leading the top end of the inner cylinder 3 to be sealed, ensuring the sealing performance of the threading cylinder, preventing dust from entering the photovoltaic lightning protection combiner box 1, sealing the gap between the cable and the sealing ball 6 through the sealing bag 16, because the diameter of the cable is different, when the diameter of the cable is larger, the cable is difficult to pass through the sealing bag 16, therefore, when the cable is inserted into the inner cylinder 3, the cable props the sealing plate 7 open, the sealing plate 7 rotates upwards, the hauling cable 8 moves upwards, when the hauling cable 8 moves upwards, the connecting rope 21 drives the plug rod 20 to move upwards, when the plug rod 20 moves upwards, the piston 19 is driven to move upwards, thereby leading the gas in the sealing bag 16 to enter the cylinder body 18 through the gas pipe 17, therefore, the aperture of the through hole in the middle of the sealing bag 16 is increased, the diameter of the cable is larger, the rotating angle of the sealing plate 7 is larger, the upward moving distance of the traction rope 8 is larger, the distance that the connection rope 21 drives the piston 19 to move upwards through the plug rod 20 is larger, the more gas is input into the cylinder 18 through the gas pipe 17 by the sealing bag 16, the larger the aperture of the through hole in the middle of the sealing bag 16 is, and the thicker cable can conveniently penetrate through the through hole.