High-power photovoltaic string inverter

Abstract

The utility model discloses a high-power photovoltaic string type inverter, which relates to the technical field of photovoltaic inverters and comprises an inverter outer shell, a wiring ring seat is fixedly connected to the back side of the inverter outer shell, a square groove is arranged on the back side of the wiring ring seat, and a plurality of wiring ring seats are arranged in the square groove. A plurality of power connection sockets are fixedly connected to the groove bottom of the rear side of the wiring ring base at equal intervals, right-angle power connection plugs are inserted into the rear sides of the power connection sockets, and a protection plate can press a sealing rubber pad to make contact with the rear side of the wiring ring base to plug the rear side of the wiring ring base, so that rainwater and moisture are effectively prevented from entering the wiring ring base; and meanwhile, the power connection socket and the right-angle power connection plug are wrapped and protected, so that accidental collision and damage are avoided, and the safety and reliability of nodes of the power connection socket and the right-angle power connection plug are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic inverters, and particularly relates to a high-power photovoltaic string inverter. Background Art

[0002] An inverter is a power adjustment device composed of semiconductor devices, mainly used to convert DC power into AC power, generally consisting of a boost circuit and an inverter bridge circuit. The boost circuit boosts the DC voltage of the solar cell to the DC voltage required for the output control of the inverter; the inverter bridge circuit equivalently converts the boosted DC voltage into an AC voltage of a common frequency.

[0003] During the use of the existing photovoltaic string inverter, since the sockets at the bottom of the inverter are exposed outside, it is easy for hands and foreign objects to touch them, there are safety hazards, and the foreign objects touching them will also cause damage to the sockets. For this reason, we propose a high-power photovoltaic string inverter. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems that since the sockets at the bottom of the inverter are exposed outside, it is easy for hands and foreign objects to touch them, there are safety hazards, and the foreign objects touching them will also cause damage to the sockets. The utility model provides a high-power photovoltaic string inverter.

[0005] The utility model specifically adopts the following technical solutions to achieve the above purpose:

[0006] A high-power photovoltaic string inverter includes an inverter housing. A wiring ring seat is fixedly connected to the back side of the inverter housing, and a square groove is provided at the rear side of the wiring ring seat. A plurality of power connection sockets are fixedly connected to the bottom of the rear side groove of the wiring ring seat at equal intervals, and the plurality of power connection sockets are electrically connected to the input and output ends of the inverter respectively. Right-angle power connection plugs are inserted into the rear sides of the plurality of power connection sockets, and a power transmission cable is fixedly connected to the bottom of the right-angle power connection plugs. Threading grooves are formed at the lower edge of the rear side of the wiring ring seat at positions corresponding to the plurality of power connection sockets, and the power transmission cables extend downward through the threading grooves one by one. A protective plate is hingedly connected to the rear side of the inverter housing, and a pressing sealing rubber pad is fixedly connected to the inner wall of the protective plate corresponding to the rear side of the wiring ring seat.

[0007] Furthermore, a plurality of threading sealing plugs are fixedly connected to the lower side of the pressing sealing rubber pad at positions corresponding to the plurality of threading grooves, and the plurality of threading sealing plugs are all hollow soft rubber air bags.

[0008] Furthermore, a turning seat is fixedly connected to the middle of the back side of the inverter housing, and the protective plate is hingedly connected to both ends of the turning seat.

[0009] Further, an arc-shaped convex block that fits the outer wall of the flipping seat is provided on the inner wall of the upper side of the protection plate, and a rubber contact pad is wrapped around the outer wall of the flipping seat.

[0010] Further, a pull rope rotating seat is inserted and rotated near the bottom of both sides of the protection plate, and an elastic pull rope is fixedly connected to the side wall of the pull rope rotating seat. One end of the elastic pull rope away from the pull rope rotating seat is fixedly connected with a collar. A gland hanging rod is fixedly connected to the bottom of both sides of the outer shell of the inverter near the front side, and the collars at the outer ends of the elastic pull ropes on both sides are matched with the gland hanging rods.

[0011] Further, a deployment hanging rod is fixedly connected to the rear side of both sides of the outer shell of the inverter, and the deployment hanging rod is matched with the collar at the outer end of the elastic pull rope.

[0012] Further, a waterproof rubber sleeve is fixedly connected to the outer wall of the right-angle power connection plug, and the waterproof rubber sleeve is sleeved forward on the outer wall of the power connection socket.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. Through the provided wiring ring seat in the present utility model, multiple power connection sockets in the wiring ring seat can connect the input and output power cables through docking with the right-angle power connection plug. The right-angle structure of the right-angle power connection plug and the power cable facilitates the downward extension of the power cable, reduces the stress at the connection between the power connection socket and the right-angle power connection plug, and improves the service life of the power connection socket and the right-angle power connection plug. Through the provided wire threading groove, when the power cable passes downward through the wire threading groove, it can prevent outdoor rainwater and condensed dew from flowing along the power cable to the positions of the power connection socket and the right-angle power connection plug, ensuring the waterproof effect at the positions of the power connection socket and the right-angle power connection plug. Through the provided protection plate, the protection plate can contact the rear side of the wiring ring seat by pressing the sealing rubber pad to block the rear side of the wiring ring seat, effectively preventing rainwater and moisture from entering the wiring ring seat, ensuring the dryness of the power connection socket and the right-angle power connection plug, and at the same time wrapping and protecting the power connection socket and the right-angle power connection plug to avoid accidental bumps and damages, ensuring the safety and reliability of the connection point of the power connection socket and the right-angle power connection plug.

[0015] 2. Through the provided multiple wire threading sealing plugs in the present utility model, the multiple wire threading sealing plugs can be correspondingly inserted into the rear side of the wire threading groove. When the wire threading groove is empty, the wire threading groove can be directly blocked. When the power cable passes through the wire threading groove, it contacts the rear side of the power cable and deforms, and both ends of the wire threading sealing plug deform to block the rear side space of the power cable, ensuring the dust and waterproof effect of the inner ring of the wiring ring seat.

[0016] 3. In the present utility model, through the arranged drawstring swivel and elastic drawstring, the elastic drawstring can be stretched so that the outer end collar is sleeved on the gland hanging rod. Through the contraction elastic force of the elastic drawstring, it is ensured that the protection plate is closely attached to the rear side of the wiring ring seat. Through the arranged unfolding hanging rod, the unfolding hanging rod can sleeve and fix the outer end collar of the elastic drawstring when the protection plate is turned up, ensuring the flat unfolding of the protection plate. The flat-unfolded protection plate can also serve as a protection shed roof, playing a rain-proof effect, facilitating maintenance personnel to perform the plugging operation of the power connection socket and the right-angle power connection plug, and facilitating inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the present utility model;

[0018] Figure 2 is a perspective view of the protection plate of the present utility model after unfolding;

[0019] Figure 3 is a side cross-sectional view of the protection plate of the present utility model after unfolding;

[0020] Figure 4 is the present utility model Figure 3 an enlarged view of part A in.

[0021] Reference numerals: 1, inverter housing; 2, wiring ring seat; 3, power connection socket; 4, right-angle power connection plug; 5, power transmission cable; 6, threading groove; 7, swivel seat; 8, protection plate; 9, pressing sealing rubber pad; 10, threading sealing plug; 11, waterproof rubber sleeve; 12, gland hanging rod; 13, drawstring swivel; 14, elastic drawstring; 15, unfolding hanging rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0023] Please refer to Figure 1 - Figure 4, the present utility model provides a high-power photovoltaic string inverter, which includes an inverter housing 1. A wiring ring seat 2 is fixedly connected to the back side of the inverter housing 1, and a square groove is provided at the rear side of the wiring ring seat 2. A plurality of power connection sockets 3 are fixedly connected to the bottom of the rear groove of the wiring ring seat 2 at equal intervals, and the plurality of power connection sockets 3 are respectively electrically connected to the input and output ends of the inverter. A right-angle power connection plug 4 is inserted into the rear side of the plurality of power connection sockets 3, and a power transmission cable 5 is fixedly connected to the bottom of the right-angle power connection plug 4. Threading grooves 6 are provided at the lower edge of the rear side of the wiring ring seat 2 corresponding to the positions of the plurality of power connection sockets 3, and the power transmission cables 5 extend downward through the threading grooves 6 one by one. A protective plate 8 is hingedly connected to the rear side of the inverter housing 1, and a pressing sealing rubber pad 9 is fixedly connected to the inner wall of the protective plate 8 corresponding to the rear side of the wiring ring seat 2.

[0024] In this embodiment, preferably, a plurality of threading sealing plugs 10 are fixedly connected to the lower side of the pressing sealing rubber pad 9 corresponding to the plurality of threading grooves 6, and the plurality of threading sealing plugs 10 are all hollow soft rubber air bags; through the arrangement of the plurality of threading sealing plugs 10, the plurality of threading sealing plugs 10 can be correspondingly clamped into the rear side of the threading grooves 6. When the threading grooves 6 are empty, the threading grooves 6 are directly blocked. When the power transmission cables 5 pass through the threading grooves 6, they contact and deform with the rear side of the power transmission cables 5, and both ends of the threading sealing plugs 10 deform to block the rear side space of the power transmission cables 5, ensuring the dust and waterproof effects inside the wiring ring seat 2.

[0025] In this embodiment, preferably, a turning seat 7 is fixedly connected to the middle of the back side of the inverter housing 1, and the protective plate 8 is hingedly connected to both ends of the turning seat 7; through the arrangement of the turning seat 7, the turning seat 7 facilitates the hinged installation of the protective plate 8.

[0026] In this embodiment, preferably, an arc-shaped convex block that fits the outer wall of the turning seat 7 is provided on the inner wall of the upper side of the protective plate 8, and a rubber contact pad is wrapped around the outer wall of the turning seat 7; through the arrangement of the arc-shaped convex block, the arc-shaped convex block can keep in contact with the rubber contact pad on the outer wall of the turning seat 7 when the protective plate 8 rotates around the turning seat 7, maintaining the waterproof effect on the upper side of the protective plate 8.

[0027] In this embodiment, preferably, a pull rope rotating seat 13 is inserted and rotated near the bottom of both sides of the protective plate 8, and an elastic pull rope 14 is fixedly connected to the side wall of the pull rope rotating seat 13. One end of the elastic pull rope 14 away from the pull rope rotating seat 13 is fixedly connected with a collar. Pressure cover hanging rods 12 are fixedly connected to the bottom of both sides of the inverter housing 1 near the front side, and the outer collar of the elastic pull ropes 14 on both sides is matched with the pressure cover hanging rods 12; through the arrangement of the pull rope rotating seat 13 and the elastic pull rope 14, the elastic pull rope 14 can be stretched so that the outer collar is sleeved on the pressure cover hanging rod 12, and through the contraction elastic force of the elastic pull rope 14, the close fit between the protective plate 8 and the rear side of the wiring ring seat 2 is ensured.

[0028] In this embodiment, preferably, expansion hanging rods 15 are fixedly connected to both sides of the inverter housing 1 near the rear side, and the expansion hanging rods 15 are matched with the outer end rings of the elastic pull ropes 14; through the arranged expansion hanging rods 15, the expansion hanging rods 15 can sleeve and fix the outer end rings of the elastic pull ropes 14 when the protection plate 8 is turned up, ensuring the flat unfolding of the protection plate 8. The flat-unfolded protection plate 8 can also serve as a protective shed roof, providing a rain-proof effect, facilitating the maintenance personnel to perform the plugging operation of the power connection socket 3 and the right-angle power connection plug 4, and facilitating inspection and maintenance.

[0029] In this embodiment, preferably, a waterproof rubber sleeve 11 is fixedly connected to the outer wall of the right-angle power connection plug 4, and the waterproof rubber sleeve 11 is sleeved forward on the outer wall of the power connection socket 3; through the arranged waterproof rubber sleeve 11, the waterproof rubber sleeve 11 can be press-fitted on the outer wall of the power connection socket 3, further ensuring the dust-proof and waterproof effect at the plugging position of the power connection socket 3 and the right-angle power connection plug 4.

[0030] The working principle and usage process of the present utility model: When the device is in use, through the arranged wiring ring base 2, multiple power connection sockets 3 in the wiring ring base 2 can connect the input and output power cables 5 through the connection with the right-angle power connection plugs 4. The right-angle structure of the right-angle power connection plugs 4 and the power cables 5 facilitates the downward extension of the power cables 5, reduces the stress at the connection of the power connection sockets 3 and the right-angle power connection plugs 4, and improves the service life of the power connection sockets 3 and the right-angle power connection plugs 4. Through the arranged wire passing groove 6, the power cables 5 passing downward through the wire passing groove 6 can prevent outdoor rainwater and condensed dew from flowing along the power cables 5 to the positions of the power connection sockets 3 and the right-angle power connection plugs 4, ensuring the waterproof effect at the positions of the power connection sockets 3 and the right-angle power connection plugs 4. Through the arranged protection plate 8, the protection plate 8 can contact the rear side of the wiring ring base 2 by pressing the sealing rubber pad 9 to block the rear side of the wiring ring base 2, effectively preventing rainwater and moisture from entering the wiring ring base 2, ensuring the dryness of the power connection sockets 3 and the right-angle power connection plugs 4, and at the same time wrapping and protecting the power connection sockets 3 and the right-angle power connection plugs 4 to avoid accidental bumps and damages, ensuring the safety and reliability of the nodes of the power connection sockets 3 and the right-angle power connection plugs 4.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-power photovoltaic string inverter, characterized in that: The invention comprises an inverter housing (1), wherein a wiring ring seat (2) is fixedly connected to the back side of the inverter housing (1), and a square groove is arranged on the rear side of the wiring ring seat (2); a plurality of power sockets (3) are fixedly connected to the bottom of the groove on the rear side of the wiring ring seat (2) at equal intervals, and the plurality of power sockets (3) are respectively electrically connected to the input and output ends of the inverter; a right-angle power plug (4) is inserted into the rear side of the plurality of power sockets (3), and a power transmission cable (5) is fixedly connected to the bottom of the right-angle power plug (4); a threading groove (6) is provided on the lower edge of the rear side of the wiring ring seat (2) at positions corresponding to the plurality of power sockets (3), and the power transmission cables (5) extend downwardly through the threading grooves (6) in a one-to-one correspondence; a protective plate (8) is hingedly connected to the rear side of the inverter housing (1), and a press-sealing rubber pad (9) is fixedly connected to the inner wall of the protective plate (8) corresponding to the rear side of the wiring ring seat (2).

2. A high-power photovoltaic string inverter according to claim 1, characterized in that: A plurality of threading sealing plugs (10) are fixedly connected to the lower side of the pressing sealing rubber pad (9) corresponding to the plurality of threading grooves (6), and the plurality of threading sealing plugs (10) are all hollow soft rubber airbags.

3. A high-power photovoltaic string inverter according to claim 1, characterized in that: A flip seat (7) is fixedly connected to the middle of the back side of the inverter outer shell (1), and a protective plate (8) is hingedly connected to both ends of the flip seat (7).

4. A high-power photovoltaic string inverter according to claim 3, characterized in that: The upper inner wall of the protective plate (8) is provided with an arc-shaped protrusion that fits with the outer wall of the flip seat (7), and the outer wall of the flip seat (7) is wrapped with a circle of rubber contact pad.

5. A high-power photovoltaic string inverter according to claim 1, characterized in that: Both sides of the protection plate (8) are plugged and rotatably connected with a drawstring swivel seat (13) near the bottom, and the side wall of the drawstring swivel seat (13) is fixedly connected with an elastic drawstring (14), and one end of the elastic drawstring (14) away from the drawstring swivel seat (13) is fixedly connected with a ring, and both sides of the bottom of the inverter housing (1) are fixedly connected with a pressure cover hanging rod (12) near the front side, and the outer end rings of the elastic drawstrings (14) on both sides match the pressure cover hanging rod (12).

6. A high-power photovoltaic string inverter according to claim 5, characterized in that: The inverter outer shell (1) is also fixedly connected with an unfolding hanging rod (15) on both sides close to the rear side, and the unfolding hanging rod (15) matches the outer end ring of the elastic pull rope (14).

7. A high-power photovoltaic string inverter according to claim 1, characterized in that: The outer wall of the right-angle electrical plug (4) is fixedly connected with a waterproof rubber sleeve (11), and the waterproof rubber sleeve (11) is sleeved on the outer wall of the electrical socket (3) facing forward.

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