CN115276553A

CN115276553A - Junction box for sea surface photovoltaic

Info

Publication number: CN115276553A
Application number: CN202211197640.7A
Authority: CN
Inventors: 张�浩; 王建华
Original assignee: Jiangsu Zerun New Material Co ltd
Current assignee: Jiangsu Zerun Xinneng Technology Co ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2022-11-01
Anticipated expiration: 2042-09-29
Also published as: CN115276553B

Abstract

The invention relates to the technical field of photovoltaic junction boxes, in particular to a junction box for sea surface photovoltaic, which comprises a protection mechanism, a cable clamping mechanism and a transverse pushing mechanism, wherein the protection mechanism comprises a transverse waterproof component, a motor set arranged in the waterproof component and a moisture-proof gasket arranged in the waterproof component in an array mode. But the motor group of the outward moisture of emission of installation in the inside perpendicular hole of waterproof component, set up the cross bore at the waterproof component opposite side simultaneously, and set up the hole that guide water smoke flows respectively in the top and the bottom of the inner wall of cross bore, and combine two vertical distribution's arc pipe to communicate two inside holes of waterproof component, along the separation packing ring when the cable, waterproof outer loop and prevention of seepage sleeve pipe transversely run through the back, the arc pipe can be to the outside of cable carrying out the circumference constraint, thereby can make the cable of horizontal line constraint can obtain effectual dry sealing after being connected with the terminal box again.

Description

Junction box for sea surface photovoltaic

Technical Field

The invention relates to the technical field of photovoltaic junction boxes, in particular to a junction box for sea surface photovoltaic.

Background

The photovoltaic junction box is a connecting device between a solar cell array formed by solar cell modules and the solar charging control device, and is mainly used for connecting and protecting the solar cell modules, connecting electric power generated by the solar cells with an external circuit and conducting current generated by the photovoltaic modules.

At present, photovoltaic module is applied to each field, and under traditional in service behavior, the photovoltaic module who is close to the sea can receive the influence of sea water, and strict sealing treatment need be accomplished to the cable of photovoltaic module internal connection, but receives the erosion of long-time sunshine and atomizing back sea water, and serious corrosion can appear in the joint between cable and the terminal box, can greatly influence the transport of normal current when serious.

Therefore, how to solve the dry connection between the cable and the junction box on the photovoltaic module is the technical difficulty to be solved by the invention aiming at the photovoltaic module close to the seaside.

Disclosure of Invention

The present invention is directed to solving one of the technical problems of the prior art or the related art.

Therefore, the technical scheme adopted by the invention is as follows:

the junction box comprises a protection mechanism, a cable clamping mechanism and a transverse propelling mechanism, wherein the protection mechanism comprises a transverse waterproof component, a motor set arranged in the waterproof component, a damp-proof gasket arranged in the waterproof component, an arc tube arranged in the waterproof component, a separation gasket arranged in the waterproof component, a waterproof outer ring movably arranged in the separation gasket, an anti-seepage sleeve arranged in the waterproof component and positioned at the inner end of the separation gasket, and a binding member connected to the inner end of the anti-seepage sleeve, wherein the waterproof component comprises a shell for preventing water mist from invading, a bearing bottom support arranged in the shell, a plate electrode arranged at the top of the bearing bottom support, an exhaust cushion plate connected in a circular vertical hole at the top of the shell, and a glass plate movably arranged in a rectangular groove at the top of the shell, the cable clamping mechanism is arranged in the protection mechanism and comprises two groups of telescopic components arranged in the shell, a second pressurizing component arranged on the telescopic components, a first pressurizing piece movably arranged in the second pressurizing piece, two springs arranged in the first pressurizing piece, a stand column arranged at the top of the first pressurizing piece, and a tension spring connected to the stand column, the transverse propelling mechanism is arranged in the shell, and the main pressurizing piece, and the slide plate is arranged in the shell and comprises two constant-pressure rods, a plurality of auxiliary slide rods, auxiliary slide plates and a plurality of auxiliary slide plates arranged in the auxiliary slide plates and a plurality of auxiliary slide plate.

The present invention in a preferred example may be further configured to: the exhaust slotted hole that the level distributes is seted up to one side of shell bottom, the outside both sides of shell are seted up the slide of horizontal distribution, and the slide adaptation of shell both sides retrains the horizontal pole in the main pull rod.

By adopting the technical scheme, the transverse groove for guiding water mist to be evacuated is formed in the waterproof assembly, the exhaust hole grooves which are densely distributed are formed in one side of the bottom of the waterproof assembly, and the guide of the water mist outside the cable is combined with the two holes in the waterproof assembly, so that the corrosion caused by the fact that the end of the cable is infected by the water mist can be avoided.

The present invention in a preferred example may be further configured to: the motor set is formed by combining a servo motor and turbine fan blades arranged on a shaft lever at the bottom end of the servo motor.

Through adopting above-mentioned technical scheme, the utilization is with the whole vertical placing of motor train, and the high-speed rotation of the internal turbine flabellum of motor train this moment can outwards discharge the water smoke in the inside cross slot of waterproof component to this can make the inside cross bore of waterproof component and the water smoke in the space beyond the cable carry out directional transmission, and then in order to avoid the water smoke to invade in the waterproof component inner space.

The invention in a preferred example may be further configured to: the arc tube is made of aluminum alloy materials, and the arc tube is integrally of a quarter arc-shaped structure.

By adopting the technical scheme, the arc pipe is made of the aluminum alloy material, so that the intensity and the service life of the arc pipe can be improved while the water mist in the inner hole of the waterproof assembly is guided to flow.

The present invention in a preferred example may be further configured to: the waterproof outer ring is made of rubber materials, the waterproof outer ring is I-shaped, and two ends of the waterproof outer ring are respectively located on two sides of the blocking washer and restrain the transverse cables.

Through adopting above-mentioned technical scheme, utilize the pliability of waterproof outer loop self, when the cable transversely runs through to the inboard notch of waterproof outer loop in, waterproof outer loop self can carry out elastic shrinkage towards the outside of cable, until keeping apart between the local and the waterproof component cross bore of cable.

The present invention in a preferred example may be further configured to: the extension spring comprises ring shape gasket and vertical spring, and ring shape gasket adaptation is connected in the annular at stand middle part.

Through adopting above-mentioned technical scheme, when the stand wholly carries out vertical lifting, receive the reverse pressure boost of vertical spring in the extension spring to the stand, after the cable is located second pressure boost spare and first pressure boost spare middle part, in case release stand, the extension spring can drive stand and first pressure boost spare whole and carry out vertical compressing tightly and fixed facing the cable this moment.

The present invention in a preferred example may be further configured to: the bottom at first pressure boost piece both ends is seted up the slide of L shape respectively, and the bottom of L shape slide is connected with the latch closure, in addition, flexible subassembly comprises flexible female pole, flexible sub-pole and the pressure spring of installing in flexible female pole, and the top adaptation of flexible sub-pole runs through to the latch closure in.

Through adopting above-mentioned technical scheme, utilize and set up the slide of L shape respectively in the bottom at first pressure boost piece both ends to at the bottom connection latch closure of L shape slide, combine the connection of spring bottom to the latch closure, cooperate the connection of spring top to second pressure boost piece bottom simultaneously, with this can make second pressure boost piece support the protection period to the cable and maintain invariable state.

The invention in a preferred example may be further configured to: the trapezoidal spout of the same specification is all seted up to the inboard of supplementary slide and spacing slide, and the cross slot of adaptation restraint in main pull rod and beam pole is seted up respectively to the outside of two spacing slides.

Through adopting above-mentioned technical scheme, utilize to increase supplementary slide and spacing slide length to set up trapezoidal spout in the inboard of supplementary slide and spacing slide, when a plurality of sliders of centre gripping cable receive supplementary slide and spacing slide interior trapezoidal spout lateral transfer, a plurality of sliders can be to the cable at this moment and transversely fix centre gripping and location.

The present invention in a preferred example may be further configured to: the outer part of the sliding block is provided with a trapezoidal sliding block, and the inner side of the sliding block is provided with a corrugated rubber cushion layer.

Through adopting above-mentioned technical scheme, utilize to set up trapezoidal slider in the outside of slider, and set up the rubber cushion that can carry out increase frictional force to the cable outside in the inboard of slider, when slider lateral shifting, receive the spacing restraint of trapezoidal slider to supplementary slide and the inboard trapezoidal spout of spacing slide to this stability during can making the slider sideslip.

By adopting the technical scheme, the invention has the beneficial effects that:

1. according to the invention, the waterproof assembly with the moisture-removing transverse groove arranged inside is arranged, the vertical hole is arranged on one side inside the waterproof assembly, the motor set capable of discharging moisture outwards is installed in the vertical hole inside the waterproof assembly, the transverse hole is arranged on the other side of the waterproof assembly, the holes for guiding water mist to flow are respectively arranged at the top and the bottom of the inner wall of the transverse hole, the two holes inside the waterproof assembly are communicated by combining the two arc pipes which are vertically distributed, and when the cable transversely penetrates through the blocking gasket, the waterproof outer ring and the anti-seepage sleeve, the arc pipes can circumferentially bind the outer part of the cable, so that the cable bound by the transverse line can be effectively dried and sealed after being connected with the junction box, and further, external water mist can be prevented from flowing into the junction box.

2. According to the invention, the plurality of auxiliary sliding plates and the two limiting sliding plates which are distributed in a circumferential manner are installed in the transverse holes of the inner cavity of the waterproof component, the plurality of sliding blocks which are distributed in a circumferential manner and can clamp the end of the cable are movably installed in the trapezoidal sliding grooves at the inner sides of the auxiliary sliding plates and the limiting sliding plates, and the elastically stretchable pressure boost arc rods are movably installed in the plurality of sliding blocks.

3. According to the invention, two vertically distributed telescopic assemblies are arranged in the inner cavity of the waterproof assembly, the top ends of the telescopic sub-rods in the telescopic assemblies are provided with the second pressurizing parts capable of supporting the bottom of the cable, and the sliding plates at the two ends of the first pressurizing part are internally connected with the springs capable of limiting and pressurizing the telescopic sub-rods.

Drawings

FIG. 1 is a schematic diagram of one embodiment of the present invention;

FIG. 2 is a schematic bottom view of one embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of an embodiment of the invention showing internal dispersion;

FIG. 4 is a partial bottom view of FIG. 3 in accordance with one embodiment of the present invention;

FIG. 5 is a schematic diagram of the internal dispersion of FIG. 4 according to one embodiment of the present invention;

FIG. 6 is a schematic partial dispersion view of the embodiment of FIG. 5;

FIG. 7 is a schematic diagram of the internal dispersion of FIG. 5 according to one embodiment of the present invention;

FIG. 8 is a schematic diagram of the dispersion and partial cross-section of FIG. 7 according to an embodiment of the present invention.

Reference numerals are as follows:

100. a protection mechanism; 110. a waterproof assembly; 111. a housing; 112. a load-bearing bottom support; 113. an electrode plate; 114. an exhaust pad plate; 115. a glass plate; 120. a motor unit; 130. a moisture-proof gasket; 140. an arc tube; 150. a barrier gasket; 160. a waterproof outer ring; 170. an impermeable casing; 180. a bundle position member;

200. a cable clamping mechanism; 210. a column; 220. a tension spring; 230. a first plenum; 240. a spring; 250. a second plenum; 260. a telescoping assembly;

300. a transverse propulsion mechanism; 310. a main pull rod; 320. a beam; 330. a slider; 340. a constant pressure screw; 350. an auxiliary slide plate; 360. a limiting sliding plate; 370. a booster arc rod; 380. and limiting the outer ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the accompanying drawings in combination with the embodiments. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

It is to be understood that these descriptions are only exemplary, and are not intended to limit the scope of the present invention.

The following describes a junction box for surface photovoltaics according to some embodiments of the present invention with reference to the accompanying drawings.

The first embodiment is as follows:

referring to fig. 1 to 8, the junction box for sea surface photovoltaics provided by the present invention includes a protection mechanism 100, a cable holding mechanism 200, and a transverse pushing mechanism 300, wherein the cable holding mechanism 200 is installed in the protection mechanism 100, and the transverse pushing mechanism 300 is installed in the protection mechanism 100.

The protection mechanism 100 comprises a waterproof assembly 110, a motor group 120, a moisture-proof gasket 130, an arc tube 140, a blocking washer 150, a waterproof outer ring 160, an anti-seepage sleeve 170 and a restraining member 180, the waterproof assembly 110 further comprises a shell 111, a bearing bottom support 112, an electrode plate 113, an exhaust pad plate 114 and a glass plate 115, the cable clamping mechanism 200 comprises a column 210, a tension spring 220, a first pressurizing member 230, a spring 240, a second pressurizing member 250 and a telescopic assembly 260, and the transverse pushing mechanism 300 comprises a main pull rod 310, a beam rod 320, a sliding block 330, a constant pressure screw 340, an auxiliary sliding plate 350, a limiting sliding plate 360, a pressurizing arc rod 370 and a limiting outer ring 380.

Specifically, the motor unit 120 is installed in the waterproof assembly 110, the array of moisture-proof gaskets 130 is installed inside the waterproof assembly 110, the arc tube 140 is installed inside the waterproof assembly 110, the separation washer 150 is installed inside the waterproof assembly 110, the waterproof outer ring 160 is movably installed in the separation washer 150, the anti-seepage sleeve 170 is installed inside the waterproof assembly 110 and located at the inner end of the separation washer 150, the position restraining member 180 is connected at the inner end of the anti-seepage sleeve 170, the bearing bottom support 112 is installed inside the housing 111, the electrode plate 113 is installed at the top of the bearing bottom support 112, the exhaust pad 114 is connected in a circular vertical hole at the top of the housing 111, the glass plate 115 is movably installed in a rectangular slot at the top of the housing 111, two sets of telescopic assemblies 260 are installed inside the housing 111, the second pressurizing part 250 is arranged on the telescopic component 260, the first pressurizing part 230 is movably arranged in the second pressurizing part 250, two springs 240 are arranged in the first pressurizing part 230, the upright column 210 is arranged at the top of the first pressurizing part 230, the tension spring 220 is connected to the middle part of the upright column 210, a plurality of auxiliary sliding plates 350 and two limiting sliding plates 360 are circumferentially arranged in a transverse hole in the shell 111, a limiting outer ring 380 is arranged in the auxiliary sliding plates 350 and the limiting sliding plates 360, a plurality of sliding blocks 330 are movably arranged on the inner sides of the auxiliary sliding plates 350 and the limiting sliding plates 360, pressurizing arc rods 370 are movably arranged in the sliding blocks 330, the transverse main pull rod 310 and the beam rod 320 are respectively arranged on the two sliding blocks 330, and the constant pressure screw 340 is in a trapezoidal sliding block at the outer end of the main pull rod 310 in a threaded connection mode.

The top end of a telescopic sub-rod in a telescopic assembly 260 is provided with a second pressurizing piece 250 capable of supporting the bottom of a cable, springs 240 capable of limiting and pressurizing the telescopic sub-rod are connected in sliding plates at two ends of the first pressurizing piece 230, when the control upright column 210 is integrally and vertically pulled, the first pressurizing piece 230 can rapidly face the cable and a contact end part of a junction box to carry out vertical pressurizing clamping, a plurality of sliding blocks 330 which are circumferentially distributed and can clamp the cable end are movably arranged in trapezoidal sliding grooves in the inner sides of an auxiliary sliding plate 350 and a limiting sliding plate 360, an elastically stretchable pressurizing arc rod 370 is movably arranged in the sliding blocks 330, when the main pull rod 310 is controlled to drive one sliding block 330 to transversely move, the plurality of circumferentially distributed sliding blocks 330 can integrally and synchronously transversely move along the trapezoidal sliding grooves in the inner sides of the plurality of the auxiliary sliding plates 350 and the two limiting sliding plates 360, meanwhile, transverse holes are formed in the other side of the shell 111, holes are respectively formed in the top and the bottom of the inner wall of the transverse hole, two junction boxes 140 which are vertically distributed are combined to carry out water mist guiding flow, and water mist can be effectively blocked after the two junction boxes 140 are connected, and the outer ring can be effectively sealed and prevented from entering the outer ring pipe 150 and being sealed after the water mist is treated, and the water mist is effectively prevented from entering the outer ring and the outer ring 140.

Example two:

referring to fig. 3, 4 and 7, in the first embodiment, one side of the bottom of the housing 111 is provided with closely-distributed exhaust slots, two sides of the outside of the housing 111 are provided with transversely-distributed slideways, the slideways on the two sides of the housing 111 are adapted to and constrained by the cross bars in the main pull rod 310, the motor unit 120 is formed by combining a servo motor and turbine blades mounted on a shaft rod at the bottom end of the servo motor, the arc tube 140 is made of an aluminum alloy material, the arc tube 140 is integrally of a quarter-arc structure, the waterproof outer ring 160 is made of a rubber material, the waterproof outer ring 160 is i-shaped, and two ends of the waterproof outer ring 160 are respectively located on two sides of the blocking washer 150 and constrain the transverse cables.

The transverse groove for guiding water mist to be evacuated is formed in the shell 111, the exhaust hole grooves are formed in one side of the bottom of the shell, the guide of water mist outside the cable is conducted through the holes in the shell 111, corrosion caused by water mist infection of the end of the cable can be avoided, at the moment, water mist in the transverse groove in the shell 111 can be discharged outwards through high-speed rotation of turbine blades in the motor unit 120, directional transmission of the water mist in the transverse hole in the shell 111 and in the space outside the cable can be conducted, meanwhile, the water mist can be prevented from invading into the space inside the shell 111, when the cable transversely penetrates through the inner side notch of the waterproof outer ring 160, the waterproof outer ring 160 can elastically contract towards the outside of the cable, and the local part of the cable and the transverse hole in the shell 111 are isolated.

Example three:

with reference to fig. 6, on the basis of the first embodiment, the tension spring 220 is composed of a circular gasket and a vertical spring, the circular gasket is connected to the annular groove in the middle of the column 210 in an adaptive manner, the bottom of each of the two ends of the first pressurizing part 230 is provided with an L-shaped sliding plate, the bottom end of each L-shaped sliding plate is connected to a buckle, the telescopic assembly 260 is composed of a telescopic female rod, a telescopic male rod and a compression spring installed in the telescopic female rod, and the top end of each telescopic male rod is adapted to penetrate into the buckle.

When the upright column 210 is lifted vertically, the upright column 210 is pressurized reversely by the vertical spring in the tension spring 220, after the cable is positioned in the middle of the second pressurizing piece 250 and the first pressurizing piece 230, once the upright column 210 is released, the tension spring 220 can drive the upright column 210 and the first pressurizing piece 230 to vertically compress and fix the cable integrally, the bottom of the L-shaped sliding plate is connected with the buckle, the buckle is connected with the bottom end of the spring 240, and meanwhile, the top end of the spring 240 is matched with the connection of the bottom of the second pressurizing piece 250, so that the second pressurizing piece 250 can maintain a constant state during the supporting and protecting of the cable.

Example four:

referring to fig. 8, on the basis of the first embodiment, trapezoidal sliding grooves with the same specification are respectively formed in the inner sides of the auxiliary sliding plate 350 and the limiting sliding plate 360, the outer portions of the two limiting sliding plates 360 are respectively provided with transverse grooves adapted to and constrained by the main pull rod 310 and the beam rod 320, a trapezoidal sliding block is formed in the outer portion of the sliding block 330, and a corrugated rubber cushion layer is formed in the inner side of the sliding block 330.

The length of the auxiliary sliding plate 350 and the length of the limiting sliding plate 360 are increased by utilizing the auxiliary sliding plate, trapezoidal sliding grooves are formed in the inner sides of the auxiliary sliding plate 350 and the limiting sliding plate 360, when the plurality of sliding blocks 330 for clamping cables are transversely transmitted by the trapezoidal sliding grooves in the auxiliary sliding plate 350 and the limiting sliding plate 360, the plurality of sliding blocks 330 can transversely fix, clamp and position the cables, rubber cushion layers capable of increasing friction force outside the cables are formed in the inner sides of the sliding blocks 330, and when the sliding blocks 330 transversely move, the limiting constraint of the trapezoidal sliding blocks on the trapezoidal sliding grooves in the auxiliary sliding plate 350 and the limiting sliding plate 360 is received, so that the stability of the sliding blocks 330 during transverse moving can be ensured.

The working principle and the using process of the invention are as follows: an operator needs to movably mount a plurality of sliding blocks 330 outside a limiting outer ring 380 in advance, then movably connect the plurality of sliding blocks 330 distributed circumferentially by using a plurality of pressurizing arc rods 370 connected with short springs, then transversely connect two adjacent assembled sliding blocks 330 by using a beam rod 320, at this time, the assembled sliding blocks 330 can be mounted in a transverse hole on the inner wall of the waterproof component 110, then mount one sliding block 330 by using a main pull rod 310, at this time, a trapezoidal sliding block at the outer end of the main pull rod 310 can be fitted to a sliding groove at the outer side of the shell 111, then mount the restraining member 180 in the transverse hole at the outer side of the shell 111, then connect the anti-seepage sleeve 170 at the outer end of the restraining member 180, movably clamp the arc tube 140 in the blocking washer 150, then integrally mount the blocking washer 150 and the arc tube 140 in the transverse hole of the shell 111, and make the blocking washer 150 located in the anti-seepage sleeve 170, at this time, the hole inside the anti-seepage sleeve 170 and the notch in the middle of the blocking washer 150 and the arc tube 140 are symmetrical to each other, then a plurality of sets of horizontally distributed anti-seepage gaskets 130 are installed in the rectangular transverse groove at the bottom of the inner cavity of the outer shell 111, then the motor set 120 is vertically installed in the vertical hole inside the outer shell 111, so that the turbine blades at the bottom end of the motor set 120 are vertically downward and distributed facing the transverse groove at the bottom of the inner cavity of the outer shell 111, then an operator needs to transversely pass through the cable along the arc tube 140, the blocking washer 150, the waterproof outer ring 160, the anti-seepage sleeve 170 and the notch in the middle of the position restraining member 180, so that the cable passes through the gap between the first pressurizing member 230 and the second pressurizing member 250, then the end of the cable is extended into the hole at the bottom of the electrode plate 113, then the motor set 120 is taken out, the nut on the electrode plate 113 is screwed by using a screwdriver, and then the main pull rod 310 is controlled to transversely move integrally, the cable is tightened and fixed by a plurality of sliding blocks 330 distributed circumferentially.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A junction box for sea surface photovoltaic is characterized by comprising a protection mechanism (100), a cable clamping mechanism (200) and a transverse pushing mechanism (300);

the protection mechanism (100) comprises a transverse waterproof assembly (110), a motor set (120) installed in the waterproof assembly (110), a damp-proof gasket (130) installed inside the waterproof assembly (110) in an array mode, an arc pipe (140) installed inside the waterproof assembly (110), a blocking gasket (150) installed in the waterproof assembly (110), a waterproof outer ring (160) movably installed in the blocking gasket (150), an anti-seepage sleeve (170) installed in the waterproof assembly (110) and located at the inner end of the blocking gasket (150) and a position restraining piece (180) connected to the inner end of the anti-seepage sleeve (170);

the waterproof assembly (110) comprises a shell (111) for preventing water mist from invading, a bearing bottom support (112) arranged inside the shell (111), an electrode plate (113) arranged at the top of the bearing bottom support (112), an exhaust base plate (114) connected in a circular vertical hole at the top of the shell (111) and a glass plate (115) movably arranged in a rectangular notch at the top of the shell (111);

the cable clamping mechanism (200) is arranged in the protection mechanism (100) and comprises two groups of telescopic assemblies (260) arranged in a shell (111), a second pressurizing piece (250) arranged on the telescopic assemblies (260), a first pressurizing piece (230) movably arranged in the second pressurizing piece (250) and positioned right above the second pressurizing piece, two springs (240) arranged in the first pressurizing piece (230), an upright post (210) arranged at the top of the first pressurizing piece (230) and a tension spring (220) connected to the middle of the upright post (210);

the transverse propelling mechanism (300) is installed in the protection mechanism (100) and comprises a plurality of auxiliary sliding plates (350) and two limiting sliding plates (360) which are circumferentially installed in transverse holes in the shell (111), limiting outer rings (380) installed in the auxiliary sliding plates (350) and the limiting sliding plates (360), a plurality of sliding blocks (330) movably installed on the inner sides of the auxiliary sliding plates (350) and the limiting sliding plates (360), pressurizing arc rods (370) movably installed in the sliding blocks (330), a main pull rod (310) and a beam rod (320) which are installed on the two sliding blocks (330) and are transverse, and a constant-pressure screw (340) which is in threaded connection with the outer end sliding blocks of the main pull rod (310).

2. The junction box for offshore photovoltaics according to claim 1, wherein one side of the bottom of the housing (111) is provided with closely-distributed exhaust slots, two sides of the outside of the housing (111) are provided with transversely-distributed slideways, and the slideways on the two sides of the housing (111) are adapted to cross bars constrained in the main pull rod (310).

3. The junction box of claim 1, wherein the motor set (120) is composed of a servo motor and turbine blades mounted on a shaft at a bottom end of the servo motor.

4. The junction box for marine surface photovoltaics of claim 1, wherein the arc tube (140) is made of an aluminum alloy material, and the arc tube (140) has a quarter-arc structure as a whole.

5. The junction box for marine surface photovoltaics of claim 1, wherein the waterproof outer ring (160) is made of rubber material, the waterproof outer ring (160) is i-shaped, and both ends of the waterproof outer ring (160) are respectively located on both sides of the blocking washer (150) and restrain the transverse cables.

6. The junction box for offshore photovoltaics according to claim 1, wherein the tension spring (220) is composed of a circular gasket and a vertical spring, and the circular gasket is fittingly connected in a ring groove in the middle of the upright column (210).

7. The junction box for offshore photovoltaics according to claim 1, wherein L-shaped sliding plates are respectively arranged at the bottoms of the two ends of the first pressurizing member (230), and the bottom ends of the L-shaped sliding plates are connected with buckles.

8. The junction box for marine surface photovoltaics of claim 1, wherein the telescoping assembly (260) is comprised of a telescoping female rod, a telescoping male rod, and a compression spring mounted within the telescoping female rod, and the top end of the telescoping male rod fits through the ring buckle.

9. The junction box for offshore photovoltaics according to claim 1, wherein the inner sides of the auxiliary sliding plate (350) and the limiting sliding plates (360) are both provided with trapezoidal sliding grooves with the same specification, and the outer parts of the two limiting sliding plates (360) are respectively provided with transverse grooves adapted to be constrained to the main pull rod (310) and the beam rod (320).

10. The junction box for offshore photovoltaics according to claim 1, wherein a trapezoidal slider is disposed on an outer portion of the slider (330), and a corrugated rubber cushion is disposed on an inner side of the slider (330).