A grid-connected cable protection device for a photovoltaic power station

Abstract

The present invention discloses a protection device for grid-connected cables of a photovoltaic power station, which relates to the technical field of photovoltaic power generation. The protection device for grid-connected cables of a photovoltaic power station includes a mounting rack connected to an inverter. The mounting rack is provided with a holding assembly for restricting the bending degree of the cable and a fastening assembly for fixing the cable joint. The holding assembly includes a holding frame. One end of the holding frame is hinged to the mounting rack, and the other end of the holding frame is provided with a clamping plate for fixing the cable. The fastening assembly includes a first connecting pipe and a second connecting pipe connected to the inverter. The cable passes through the first connecting pipe and the second connecting pipe and then is connected to the inverter. The second connecting pipe is provided with a first through hole, and a fastening rod is arranged in the first through hole. A driving pipe is threadedly connected to the second connecting pipe, and the driving pipe pushes the arc-shaped end to make the inner end of the fastening rod press against the cable. The protection device for grid-connected cables of a photovoltaic power station wraps and clamps the cable through the holding assembly, and makes the connection between the DC cable and the inverter more reliable and stable through the fastening assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and particularly relates to a protection device for grid-connected cables of a photovoltaic power station. Background Art

[0002] In recent years, with the continuous improvement of the global awareness of clean energy and environmental protection, household photovoltaic power generation has developed rapidly. Governments of various countries have successively introduced relevant policies to encourage families to install solar photovoltaic panels in order to reduce dependence on traditional energy and reduce carbon emissions. A household photovoltaic power generation system generally consists of solar panels, a solar charge and discharge controller, a battery pack, an inverter, and related electrical connection and installation components such as DC cables. Among them, the solar panels are responsible for converting solar energy into DC electrical energy; the solar charge and discharge controller is used to control the charging and discharging process of the battery to protect the battery from overcharging or over-discharging damage; the battery pack is used to store electrical energy for power supply at night or when the light is insufficient; the inverter converts DC electrical energy into AC electrical energy to meet the household electricity demand.

[0003] In the related art, the DC cable transports the electrical energy generated by the solar panels to the inverter. Since the solar panels are usually installed on the roof, when connecting the DC cable to the inverter, the DC cable needs to be bent. When the bending degree is large, a large restoring force will be generated at the bent part of the DC cable, and over time, the joint at one end of the DC cable is likely to be separated from the inverter. Moreover, the inverter is usually installed outdoors, and the DC cable is also likely to be separated from the inverter under the long-term influence of wind and shaking.

[0004] Therefore, the prior art needs to be improved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the connection between the cable and the inverter in the prior art is unstable. The purpose is to provide a protection device for grid-connected cables of a photovoltaic power station, which adopts corresponding technical solutions and has the beneficial effects of making the cable connection firm, not easy to loosen, and having a longer service life.

[0006] The present invention is achieved by the following technical solutions:

[0007] The present invention provides a protection device for grid-connected cables of a photovoltaic power station, which includes a mounting rack connected to the inverter. The mounting rack is provided with a holding assembly for restricting the bending degree of the cable and a fastening assembly for fixing the cable joint.

[0008] The holding assembly includes a holding frame. One end of the holding frame is hinged to the mounting rack, and the other end of the holding frame is provided with a clamping plate for fixing the cable.

[0009] The fastening assembly includes a first connecting pipe and a second connecting pipe connected to the inverter. The cable passes through the first connecting pipe and the second connecting pipe and then is connected to the inverter. The second connecting pipe is provided with a first through hole, and a fastening rod is arranged in the first through hole. The outer end of the fastening rod is configured as an arc end. The second connecting pipe is threadedly connected with a driving pipe, and the driving pipe pushes the arc end to make the inner end of the fastening rod press against the cable.

[0010] Further, in the present invention, the other end of the above-mentioned cage is provided with an I-shaped plate. Connecting shafts are arranged on both sides of the I-shaped plate. The connecting shafts are rotatably connected to the clamping plates, and torsion springs connected to the clamping plates are arranged on the connecting shafts.

[0011] Further, in the present invention, the height of one end of the above-mentioned cage from the ground is higher than the height of the other end of the cage from the ground.

[0012] Further, in the present invention, the above-mentioned cable is sleeved with a support plate and a second spring. A third step portion is arranged in the second connecting pipe. One end of the second spring acts on the support plate, and the other end of the second spring acts on the third step portion.

[0013] Further, in the present invention, the first connecting pipe is provided with a second through hole, and an indicating rod is arranged in the second through hole. A triggering member is arranged at the bottom of the support plate. A first inclined surface is arranged on one side of the triggering member close to the indicating rod, and a second inclined surface is arranged on one side of the indicating rod close to the triggering member. The first inclined surface is parallel to the second inclined surface.

[0014] Further, in the present invention, the above-mentioned multiple indicating rods are evenly distributed around the axis of the first connecting pipe, and the triggering member is configured as a cylinder.

[0015] Further, in the present invention, the end of the above-mentioned driving pipe facing the fastening rod is configured as an inclined surface connected to the arc end.

[0016] Further, in the present invention, the first through hole is provided with a first step portion, the fastening rod is provided with a second step portion, and a first spring is sleeved on the fastening rod. The two ends of the first spring act on the first step portion and the second step portion respectively.

[0017] Further, in the present invention, the number of the above-mentioned fastening rods is at least three, and the fastening rods are evenly distributed around the second connecting pipe.

[0018] Further, in the present invention, the mounting bracket is provided with a guiding bracket connected to the cable.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] 1. The grid-connected cable protection device for a photovoltaic power station of the present invention is provided with a holding component on the mounting frame, and a holding frame and a clamping plate for wrapping and clamping the DC cable are arranged on the holding component. In this way, the bending degree of the DC cable can be maintained, the restoring force generated due to bending can be reduced, and thus the situation of the DC cable being detached from the inverter can be reduced. In addition, by driving the driving tube to drive a plurality of fastening rods to clamp the DC cable, the connection between the DC cable and the inverter can be further strengthened, so that the connection between the DC cable and the inverter can be made more reliable and stable, and the service life can be extended.

[0021] 2. The grid-connected cable protection device for a photovoltaic power station of the present invention is provided with a support plate and a triggering member on the DC cable. When the DC cable is detached from the inverter, one end of the indicating rod can be extruded to the outside of the first connecting tube by using the triggering member. In this way, it can be judged whether the DC cable is detached from the inverter by observing the position of the indicating rod, and the use is more intuitive and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0023] Figure 1 is a schematic diagram of the grid-connected cable protection device for a photovoltaic power station of the present invention;

[0024] Figure 2 is a schematic diagram of the holding component of the present invention;

[0025] Figure 3 is Figure 1 an enlarged schematic diagram of part A in

[0026] Figure 4 is a cross-sectional schematic diagram of the fastening component of the present invention;

[0027] Figure 5 is Figure 4 an enlarged schematic diagram of part B in

[0028] Figure 6 is Figure 4 an enlarged schematic diagram of part C in

[0029] Marks in the attached drawings and corresponding component names: 1 - Inverter, 2 - Mounting bracket, 21 - Guide bracket, 3 - Cable, 4 - Retaining assembly, 41 - Retaining frame, 411 - I-shaped plate, 412 - Connecting shaft, 413 - Torsion spring, 42 - Clamping plate, 5 - Fastening assembly, 51 - First connecting pipe, 511 - Second through hole, 52 - Second connecting pipe, 521 - First through hole, 5211 - First stepped portion, 522 - Third stepped portion, 53 - Fastening rod, 531 - Arc end, 532 - Second stepped portion, 54 - Driving pipe, 541 - Inclined surface, 55 - First spring, 6 - Support plate, 7 - Second spring, 8 - Triggering member, 81 - First inclined surface, 9 - Indicator rod, 91 - Second inclined surface. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the embodiments and the attached drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and shall not be construed as limiting the present invention. The following detailed description of the embodiments of the present invention provided in the attached drawings is not intended to limit the scope of the present invention claimed, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that: Similar reference numerals and letters denote similar items in the following attached drawings. Therefore, once an item is defined in one attached drawing, it does not need to be further defined and explained in subsequent attached drawings. In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and defined, if the terms "set", "installed", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Embodiment: In combination with Figures 1 - 6 As shown, a photovoltaic power station grid-connected cable protection device provided by an embodiment of the present invention has the following specific structure.

[0033] In combination with Figure 1 As shown, the photovoltaic power station grid-connected cable protection device includes four retaining assemblies 4 and four fastening assemblies 5 for fixing a photovoltaic inverter 1 and four cables 3. The inverter 1 is a prior art, and the internal structure and principle of which do not need to be specifically shown in this application.

[0034] Furthermore, in combination with Figure 1As shown, the mounting bracket 2 mainly functions to mount and support. The mounting bracket 2 is used to mount the inverter 1 and can provide mounting positions for the retaining assembly 4 and the fastening assembly 5. During use, the inverter 1 can be fixedly connected to the mounting bracket 2. Connection holes are provided on the mounting bracket 2, and then bolts can be used to fixedly connect the mounting bracket 2 to a wall or other carrier through the connection holes, thereby facilitating the installation of the inverter 1.

[0035] In this embodiment, since there are four DC cables 3, four retaining assemblies 4 are also provided. As Figure 1 shown, the DC cables 3 and the retaining assemblies 4 are in one-to-one correspondence. The retaining assembly 4 is mainly used to limit the bending degree of the corresponding DC cable 3, so that the bending degree of the DC cable 3 during installation can be reduced, thereby reducing the restoring force generated by the bending of the DC cable 3, and further making the connection between the DC cable 3 and the inverter 1 more stable.

[0036] Furthermore, in combination with Figure 1 and Figure 2 shown, the retaining assembly 4 mainly includes two parts: a retaining frame 41 and a clamping plate 42. The retaining frame 41 is made of a long metal rod. The inner end of the retaining frame 41 is hinged to the mounting bracket 2. Specifically, a hinge support is installed on the surface of the mounting bracket 2, and the inner end of the retaining frame 41 is connected to the hinge support, so that the retaining frame 41 can rotate around the mounting bracket 2. A T-shaped plate 411 is fixedly installed at the outer end of the retaining frame 41. The outer shape of the T-shaped plate 411 is in the shape of a T. A connecting shaft 412 is installed on each side of the T-shaped plate 411. The connecting shaft 412 passes through the clamping plate 42, and the clamping plate 42 can rotate around the connecting shaft 412. And a torsion spring 413 is installed on the connecting shaft 412, and the torsion spring 413 is also connected to the clamping plate 42. The arc-shaped clamping plate 42 mainly functions to wrap and clamp the cable 3.

[0037] It should be noted that in the initial state where the torsion spring 413 is not deformed, the free ends of the two clamping plates 42 on both sides are in contact with each other. During use, after the joint of the cable 3 is connected to the inverter 1, the free ends of the two clamping plates 42 in the corresponding retaining assembly 4 are opened. At this time, the torsion spring 413 is deformed, and then the corresponding cable 3 is placed between the two clamping plates 42. After that, the two clamping plates 42 on both sides are released, and the free ends of the two clamping plates 42 will come into contact again under the restoring force of the torsion spring 413, thereby realizing the wrapping of the cable 3, and further enabling the DC cable 3 to maintain a safe bending degree, which is beneficial to the protection of the DC cable 3. The bending degree of the DC cable 3 can be set according to the actual working conditions by adjusting the length and inclination of the retaining frame 41.

[0038] In combination with Figure 1 and Figure 2As shown, the cage 41 is inclined downward, that is, the height of the inner end of the cage 41 (the end connected to the mounting bracket 2) from the ground is higher than the height of the outer end of the cage 41 (the end connected to the clamping plate 42) from the ground. In this way, the holding assembly 4 can be arranged close to the bending part of the DC cable 3, so as to better maintain the bending degree of the DC cable 3.

[0039] In this embodiment, combined with Figure 1 the inverter 1 interface is arranged at the bottom of the inverter 1, and the top joint of the DC cable 3 extends into the interface to achieve electrical connection with the inverter 1. Combined with Figure 3 and Figure 4 as shown, the fastening assembly 5 includes a first connecting pipe 51 and a second connecting pipe 52 arranged at the inverter 1 interface. The second connecting pipe 52 is sleeved outside the first connecting pipe 51, and the first connecting pipe 51 and the second connecting pipe 52 are threadedly connected.

[0040] Combined with Figure 4 and Figure 6 as shown, a plurality of first through holes 521 (four are arranged in this embodiment) are annularly arrayed on the second connecting pipe 52 along the axis. The first through holes 521 extend along their radial directions. A slidable fastening rod 53 is arranged in the first through holes 521. A driving pipe 54 is threadedly connected to the outer wall of the second connecting pipe 52. The driving pipe 54 can push the fastening rod 53 to move towards the inside of the second connecting pipe 52 to clamp the DC cable 3.

[0041] In the initial state, as Figure 6 shown, the end of the fastening rod 53 away from the axis of the second connecting pipe 52 extends outside the first through hole 521, which is convenient for the driving pipe 54 to be in extrusion fit with the outer end of the fastening rod 53. Moreover, the end of the fastening rod 53 close to the axis of the second connecting pipe 52 is located inside the first through hole 521, so that the interference of the fastening rod 53 on the installation process of the DC cable 3 can be reduced.

[0042] Combined with Figure 6 as shown, since the outer end of the fastening rod 53 is an arc end 531, and the arc end 531 is hemispherical. By setting the end of the fastening rod 53 close to the driving pipe 54 as a hemispherical arc end 531, when the driving pipe 54 contacts and extrudes the arc end 531 of the fastening rod 53, the friction between the driving pipe 54 and the fastening rod 53 can be reduced, making the fastening rod 53 easier to be extruded and moved. It can save effort and extend the service life of the fastening rod 53 and the driving pipe 54 at the same time.

[0043] And as Figure 6As shown in the figure, one end of the driving tube 54 facing the fastening rod 53 is provided with an inclined surface 541. The distance from the end of the inclined surface 541 close to the fastening rod 53 to the axis of the second connecting tube 52 is greater than the distance from the end of the inclined surface 541 far from the fastening rod 53 to the axis of the second connecting tube 52, that is, the outer height of the cross-section of the inclined surface 541 is higher than the inner height. The inclined surface 541 mainly plays a role of transitional guidance. During the contact and extrusion process between the driving tube 54 and the fastening rod 53, the fastening rod 53 can be gradually extruded by using the inclined surface 541, so as to further reduce the friction between the driving tube 54 and the fastening rod 53.

[0044] During use, the driving tube 54 pushes the fastening rod 53 to move towards the inside of the second connecting tube 52, and the inner end of the fastening rod 53 clamps the DC cable 3. Specifically, since the driving tube 54 is threadedly connected to the outer wall of the second connecting tube 52, by rotating the driving tube 54, the driving tube 54 can move upward along the axis of the second connecting tube 52. When the driving tube 54 moves to contact the fastening rod 53, the driving tube 54 will apply a pressure radially inward along the second connecting tube 52 to the fastening rod 53, so that the fastening rod 53 will move towards the inside of the second connecting tube 52, and then the clamping of the DC cable 3 can be realized, so that the connection between the DC cable 3 and the inverter 1 can be made more stable.

[0045] In this embodiment, as Figure 6 shown, in the axial direction of the second connecting tube 52, the cross-sectional shapes of the first through hole 521 and the fastening rod 53 are both approximately T-shaped. Therefore, the first through hole 521 is provided with a first step portion 5211, and the fastening rod 53 is provided with a second step portion 532. A first spring 55 is arranged between the first step portion 5211 and the second step portion 532. The first spring 55 is sleeved on the fastening rod 53, and the two ends are respectively fixedly connected to the first step portion 5211 and the second step portion 532. The first spring 55 mainly plays a role of providing a restoring force.

[0046] It should be noted that the smaller-diameter ends of the first through hole 521 and the fastening rod 53 are both arranged close to the axis of the second connecting tube 52. During use, when the fastening rod 53 moves towards the inside of the second connecting tube 52 under the extrusion force of the driving tube 54 to clamp the DC cable 3, the second step portion 532 will move towards the first step portion 5211, and at this time the first spring 55 will be compressed. When it is necessary to disconnect the DC cable 3 from the inverter 1, rotate the driving tube 54 in the reverse direction, the driving tube 54 will gradually disengage from the fastening rod 53, and the fastening rod 53 will return to its original position under the restoring force of the first spring 55, so that the fastening rod 53 can release the clamping of the DC cable 3.

[0047] As an alternative embodiment, the number of the first through holes 521 and the fastening rods 53 is at least three, preferably four in this embodiment, and they are evenly distributed around the second connecting pipe 52. That is to say, the number of both the first through holes 521 and the fastening rods 53 is four, so that the DC cable 3 can be clamped from multiple directions, making the arrangement of the DC cable 3 more reliable and stable.

[0048] In this embodiment, as shown in Figure 4 a third stepped portion 522 is provided in the second connecting pipe 52. A support plate 6 is sleeved at the position of the DC cable 3 inside the interface of the inverter 1, and the support plate 6 is fixedly connected to the cable 3. A second spring 7 is provided between the support plate 6 and the third stepped portion 522, and the second spring 7 is sleeved on the cable 3. The second spring 7 mainly serves to provide a supporting force. When the joint of the DC cable 3 and the inverter 1 becomes loose, the second spring 7 can provide a supporting force to the DC cable 3 through the support plate 6, thereby reducing the situation where the DC cable 3 is separated from the inverter 1.

[0049] Furthermore, as shown in Figure 4 and Figure 5 a second through hole 511 is radially formed in the first connecting pipe 51, and an indicating rod 9 is installed in the second through hole 511. The indicating rod 9 can slide horizontally in the second through hole 511. A triggering member 8 is provided on one side of the support plate 6 facing the indicating rod 9, and after the triggering member 8 descends, it can push the indicating rod 9 out of the first connecting pipe 51.

[0050] Among them, the triggering member 8 can adopt a cylindrical structure, which can ensure that the triggering member 8 can contact the indicating rod 9 during the descending process.

[0051] Furthermore, as shown in Figure 5 a first inclined surface 81 is provided on one side of the triggering member 8 close to the indicating rod 9, and second inclined surfaces 91 are provided on one side of the indicating rod 9 close to the triggering member 8. The first inclined surface 81 is parallel to the second inclined surfaces 91. Among them, both the first inclined surface 81 and the second inclined surfaces 91 can play a role of transitional guidance. During the falling process of the triggering member 8, the first inclined surface 81 will contact the second inclined surfaces 91, so that the triggering member 8 will gradually squeeze the indicating rod 9 towards the outside of the first connecting pipe 51, which can reduce the friction between the triggering member 8 and the indicating rod 9 and make the contact between the triggering member 8 and the indicating rod 9 smoother.

[0052] As shown in Figure 5As shown, in the initial state, one end of the indicating rod 9 close to the trigger 8 is located inside the first connecting pipe 51 and is arranged below the trigger 8, which facilitates the contact between the trigger 8 and the indicating rod 9 when the trigger 8 drops. The end of the indicating rod 9 far from the trigger 8 is located inside the second through hole 511. During use, when the connector of the DC cable 3 is detached from the inverter 1, the DC cable 3 will move downward under the action of gravity. At this time, the support plate 6 will drive the trigger 8 to move downward by compressing the second spring 7 under the drive of the DC cable 3. When the trigger 8 contacts and presses the indicating rod 9, the indicating rod 9 will move outside the first connecting pipe 51, so that the user can judge whether the connector of the DC cable 3 is detached from the inverter 1 by observing the position of the indicating rod 9, which is more intuitive and convenient to use.

[0053] In this embodiment, as Figure 1 shown, a guide frame 21 is fixedly connected to the mounting frame 2. The guide frame 21 is arranged above the first connecting pipe 51. A plurality of guide holes are formed in the guide frame 21, and the plurality of guide holes correspond to the plurality of DC cables 3 one by one, and the DC cables 3 pass through the corresponding guide holes. Among them, the guide frame 21 mainly plays a role of guiding and supporting. By passing the DC cables 3 through the corresponding guide holes, the guide frame 21 can be used to limit and guide the DC cables 3, so as to better maintain the state of the DC cables 3.

[0054] In summary, the present invention provides a protection device for grid-connected cables in a photovoltaic power station, which includes a mounting bracket 2 connected to an inverter 1. The mounting bracket 2 is provided with a holding assembly 4 for restricting the bending degree of the cable 3 and a fastening assembly 5 for fixing the cable joint. The holding assembly 4 includes a holding frame 41. One end of the holding frame 41 is hinged to the mounting bracket 2, and the other end of the holding frame 41 is provided with a clamping plate 42 for fixing the cable 3. The fastening assembly 5 includes a first connecting pipe 51 and a second connecting pipe 52 connected to the inverter 1. The cable 3 passes through the first connecting pipe 51 and the second connecting pipe 52 and then is connected to the inverter 1. The second connecting pipe 52 is provided with a first through hole 521, and a fastening rod 53 is arranged in the first through hole 521. The outer end of the fastening rod 53 is configured as an arc end 531. The second connecting pipe 52 is threadedly connected with a driving pipe 54, and the driving pipe 54 pushes the arc end 531 to make the inner end of the fastening rod 53 press against the cable 3. The other end of the holding frame 41 is provided with an I-shaped plate 411. Both sides of the I-shaped plate 411 are provided with connecting shafts 412, and the connecting shafts 412 are rotatably connected to the clamping plate 42. The connecting shafts 412 are provided with torsion springs 413 connected to the clamping plate 42. The height of one end of the holding frame 41 from the ground is higher than the height of the other end of the holding frame 41 from the ground. The cable 3 is sleeved with a support plate 6 and a second spring 7. A third step portion 522 is arranged in the second connecting pipe 52. One end of the second spring 7 acts on the support plate 6, and the other end of the second spring 7 acts on the third step portion 522. The first connecting pipe 51 is provided with a second through hole 511, and an indicating rod 9 is arranged in the second through hole 511. A triggering member 8 is arranged at the bottom of the support plate 6. A first inclined surface 81 is arranged on one side of the triggering member 8 close to the indicating rod 9, and a second inclined surface 91 is arranged on one side of the indicating rod 9 close to the triggering member 8. The first inclined surface 81 is parallel to the second inclined surface 91. A plurality of indicating rods 9 are evenly distributed around the axis of the first connecting pipe 51, and the triggering member 8 is configured as a cylinder. One end of the driving pipe 54 facing the fastening rod 53 is configured as an inclined surface 541 connected to the arc end 531. The first through hole 521 is provided with a first step portion 5211, and the fastening rod 53 is provided with a second step portion 532. The fastening rod 53 is sleeved with a first spring 55, and both ends of the first spring 55 act on the first step portion 5211 and the second step portion 532 respectively. The number of the fastening rods 53 is at least three, and the fastening rods 53 are evenly distributed around the second connecting pipe 52. The mounting bracket 2 is provided with a guiding frame 21 connected to the cable 3.

[0055] Therefore, the protection device for grid-connected cables in a photovoltaic power station of the present invention has the beneficial effects of making the cable connection firm, not easily loosening, and having a longer service life.

[0056] The above specific embodiments have further elaborated in detail the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A grid-connected cable protection device for a photovoltaic power station, characterized in that, It includes a mounting bracket (2) connected to an inverter (1). The mounting bracket (2) is provided with a holding component (4) for restricting the bending degree of a cable (3) and a fastening component (5) for fixing the joint of the cable (3). The holding component (4) includes a holding frame (41). One end of the holding frame (41) is hinged to the mounting bracket (2), and a clamping plate (42) for fixing the cable (3) is provided at the other end of the holding frame (41). The fastening component (5) includes a first connecting pipe (51) and a second connecting pipe (52) connected to the inverter (1). The cable (3) passes through the first connecting pipe (51) and the second connecting pipe (52) and then is connected to the inverter (1). The second connecting pipe (52) is provided with a first through hole (521). A fastening rod (53) is arranged in the first through hole (521). The outer end of the fastening rod (53) is configured as an arc end (531). The second connecting pipe (52) is threadedly connected with a driving pipe (54). The driving pipe (54) pushes the arc end (531) so that the inner end of the fastening rod (53) presses against the cable (3). The cable (3) is sleeved with a support plate (6) and a second spring (7). A third step portion (522) is arranged in the second connecting pipe (52). One end of the second spring (7) acts on the support plate (6), and the other end of the second spring (7) acts on the third step portion (522). The first connecting pipe (51) is provided with a second through hole (511). An indicating rod (9) is arranged in the second through hole (511). A trigger member (8) is arranged at the bottom of the support plate (6). A first inclined surface (81) is arranged on one side of the trigger member (8) close to the indicating rod (9). A second inclined surface (91) is arranged on one side of the indicating rod (9) close to the trigger member (8). The first inclined surface (81) is parallel to the second inclined surface (91). A plurality of indicating rods (9) are evenly distributed around the axis of the first connecting pipe (51). The trigger member (8) is configured as a cylinder.

2. The photovoltaic power station grid-connected cable protection device according to claim 1, characterized in that, An I-shaped plate (411) is arranged at the other end of the holding frame (41). Connecting shafts (412) are arranged on both sides of the I-shaped plate (411). The connecting shafts (412) are rotatably connected to the clamping plate (42). A torsion spring (413) connected to the clamping plate (42) is arranged on the connecting shafts (412).

3. The photovoltaic power station grid-connected cable protection device according to claim 2, wherein, The height of one end of the holding frame (41) from the ground is higher than the height of the other end of the holding frame (41) from the ground.

4. The photovoltaic power station grid-connected cable protection device according to claim 1, characterized in that One end of the driving pipe (54) facing the fastening rod (53) is configured as an inclined surface (541) connected to the arc end (531).

5. The photovoltaic power station grid-connected cable protection device according to claim 1, characterized in that, The first through hole (521) is provided with a first step portion (5211). The fastening rod (53) is provided with a second step portion (532). A first spring (55) is sleeved on the fastening rod (53). The two ends of the first spring (55) respectively act on the first step portion (5211) and the second step portion (532).

6. The photovoltaic power station grid-connected cable protection device according to claim 1, wherein, The number of the fastening rods (53) is at least three, and the fastening rods (53) are evenly distributed around the second connecting pipe (52).

7. The photovoltaic power station grid-connected cable protection device according to any one of claims 1-6, characterized in that, The mounting bracket (2) is provided with a guiding frame (21) connected to the cable (3).

Images