CN111446919B

CN111446919B - Photovoltaic inverter's rigid coupling system

Info

Publication number: CN111446919B
Application number: CN202010416423.7A
Authority: CN
Inventors: 时运
Original assignee: Anhui Daheng Energy Technology Co Ltd
Current assignee: Daheng Energy Co.,Ltd.
Priority date: 2020-05-17
Filing date: 2020-05-17
Publication date: 2021-01-12
Anticipated expiration: 2040-05-17
Also published as: CN111446919A

Abstract

The invention relates to a fixing system of a photovoltaic inverter. Photovoltaic inverter's rigid coupling system includes the installation frame, the photovoltaic board, rigid coupling subassembly and dc-to-ac converter, the lower part of installation frame is formed with the holder, be formed with the centre gripping groove in the holder, the protruding mounting panel that is equipped with in upper portion of installation frame, one side that the installation frame deviates from the mounting panel is fixed with the locating frame and supports the frame, the locating frame is located the top that supports the frame, it is formed with the grafting clearance to support between frame and the locating frame, the photovoltaic board is pegged graft and is fixed in the centre gripping inslot, the rigid coupling subassembly is including inserting the frame, the lock frame, the ground screw, the screw is held in the top, cable. The grounding connection of the fixed connection system of the photovoltaic inverter is stable.

Description

Photovoltaic inverter's rigid coupling system

Technical Field

The invention relates to a fixing system of a photovoltaic inverter.

Background

Photovoltaic systems are generally divided into independent systems, grid-connected systems and hybrid systems. If the solar photovoltaic system can be divided into six types in detail according to the application form, the application scale and the type of load of the solar photovoltaic system. In a photovoltaic power station, the electric energy generated by the photovoltaic panel receiving illumination is generally direct current, and in order to store the direct current in a power supply station, an inverter is required to convert the direct current into alternating current and then upload the alternating current to the power supply station. However, in a general inverter, the ground connection is often exposed to the outside, and an oxide film is easily formed again by oxidation, and the oxide film cuts off the ground connection, so that the ground connection is unstable.

Disclosure of Invention

Therefore, a fastening system for a photovoltaic inverter with a stable ground connection is needed.

A fixing system of a photovoltaic inverter comprises an installation frame, a photovoltaic plate, a fixing component and an inverter, wherein a clamping piece is formed at the lower part of the installation frame, a clamping groove is formed in the clamping piece, an installation plate is convexly arranged at the upper part of the installation frame, a positioning frame and a propping frame are fixed at one side of the installation frame, which is far away from the installation plate, the positioning frame is positioned above the propping frame, an inserting gap is formed between the propping frame and the positioning frame, the photovoltaic plate is inserted and fixed in the clamping groove, the fixing component comprises an inserting frame, a buckling frame, a grounding screw, a propping screw, a cable frame and an ellipsoid shell piece, the inserting frame is sleeved and fixed at the end part of the installation plate, the buckling frame is convexly arranged on the inserting frame and extends towards the positioning frame, a reverse buckling plate is formed at the end part of the buckling frame, the reverse buckling plate is inserted in the inserting gap, the grounding screw penetrates through the top of the buckling frame and is screwed in, the grounding ring is used for rubbing an oxide film at the corner of the installation frame to be in abutting contact with an inner side material at the corner so as to achieve grounding connection of the installation frame, the jacking screw is screwed in the abutting frame, the top end of the jacking screw abuts against the top of the abutting frame and warps upwards to abut against the lower surface of the reverse buckling plate, the cable frame is formed at the bottom of the inserting frame and abuts against the upper surface of the photovoltaic panel, the cross section of the ellipsoidal shell is in an elliptical ring shape, the bottom of the ellipsoidal shell is connected to the upper surface of the clamping piece, the side wall of the cable frame abuts against one side of the ellipsoidal shell so as to force the top of the ellipsoidal shell to arch upwards to abut against the bottom of the inserting frame, and the inverter is installed on one side, far away from the positioning frame, of the inserting frame.

In one embodiment, the clamping member comprises an upper plate, a lower plate and a longitudinal plate, the upper plate and the lower plate are arranged in parallel and vertically and convexly arranged on the side wall of the longitudinal plate, the clamping groove is formed between the upper plate and the lower plate, and the end face of the photovoltaic plate abuts against the side wall of the longitudinal plate.

In one embodiment, the longitudinal plate extends upwards, the mounting plate is transversely and convexly arranged at the top end of the longitudinal plate and is positioned above the upper plate, a clamping space is formed between the mounting plate and the upper plate, the ellipsoidal shell is positioned in the clamping space, and the positioning frame and the abutting frame are both fixed on one side, away from the ellipsoidal shell, of the longitudinal plate.

In one embodiment, the insertion frame comprises a fixed connection plate and an insertion sleeve, the insertion sleeve is sleeved on the end portion fixed on the mounting plate, the fixed connection plate is arranged on one side, away from the longitudinal plate, of the insertion sleeve in a protruding mode, and the inverter is mounted at the end portion of the fixed connection plate.

In one embodiment, an L-shaped flexible plate is formed at the upper part of the abutting frame, the upper surface of the L-shaped flexible plate forms a side wall of the inserting gap, the top end of the abutting screw abuts against the lower surface of the L-shaped flexible plate, the outer diameter of the grounding ring is gradually reduced along the vertical downward direction, and the grounding ring abuts against the connecting part of the friction longitudinal plate and the mounting plate.

In one embodiment, a rubber rod is arranged at one end, away from the longitudinal plate, of the upper plate, the cable frame comprises a connecting plate and a main frame body, the connecting plate is vertically and convexly arranged on the fixing plate, the main frame body is formed at the bottom end of the connecting plate and is attached to and supported on the upper surface of the photovoltaic plate, the middle of the connecting plate abuts against the ellipsoidal shell, and the bottom end of the connecting plate abuts against the rubber rod.

In one embodiment, the bottom surface of the reverse buckling plate is concavely provided with a sliding groove, the sliding groove penetrates through the surface of one side of the reverse buckling plate, which is far away from the longitudinal plate, the ellipsoidal shell member is penetrated and provided with a first rectangular through hole, the cable frame is penetrated and provided with a second rectangular through hole, and the first rectangular through hole is correspondingly communicated with the second rectangular through hole.

In one embodiment, the fixing component further comprises an L-shaped insertion rod, the L-shaped insertion rod comprises a first rectangular rod portion and a second rectangular rod portion which are perpendicular to each other, the first rectangular rod portion is inserted into the first rectangular through hole and the second rectangular through hole, and the top end of the second rectangular rod portion is clamped in the sliding groove and upwards supports the reverse buckling plate.

In one embodiment, the second rectangular through hole penetrates through the connecting plate and the main frame body, a convex block is convexly arranged on one side of the longitudinal plate, which is away from the positioning frame, an arc-shaped concave surface is formed on one side of the convex block, the arc-shaped concave surface is attached to the surface of the ellipsoidal shell, a middle through hole is formed in the convex block in a penetrating mode, and the middle through hole penetrates through the lower portion of the abutting frame and is aligned with the first rectangular through hole.

In one embodiment, the long axis of the ellipsoidal shell is parallel to the fastening plate, and the first rectangular rod is used for keeping the ellipsoidal shell upwards against the plug bush and transmitting the restoring force of the ellipsoidal shell to the cable frame so that the cable frame downwards presses the upper surface of the photovoltaic panel.

In the fixing system of the photovoltaic inverter, the grounding screw penetrates through the top of the buckling frame and is screwed in the positioning frame, the lower periphery of the grounding screw is convexly provided with the grounding ring, and the grounding ring is used for rubbing the oxide film at the corner of the mounting frame to be in abutting contact with the inner side material at the corner so as to realize the grounding connection of the mounting frame. Shelter from through the lock frame, consequently make the bight of installation frame can avoid the rainwater erosion, avoid oxide film's regeneration, improved the stability of ground connection. And in the process that the ground screw is fixing the buckling frame, the oxidation film on the surface of the corner part of the mounting frame can be removed in a friction mode, so that the ground connection is realized, and the two purposes are achieved. The ellipsoid shell piece is arranged, so that the side wall of the cable frame is conveniently abutted against one side of the ellipsoid shell piece after installation, the top of the ellipsoid shell piece is forced to be arched upwards to be abutted against the bottom of the inserting frame, and the inserting stability of the inserting frame is improved. The top of the abutting frame is convenient to abut against and press the reverse buckling plate, and damage caused by the fact that the top end of the screw directly contacts and abuts against the reverse buckling plate is avoided.

Drawings

Fig. 1 is a schematic plan view of a fastening system of a photovoltaic inverter according to an embodiment.

Fig. 2 is a partially enlarged view of C in fig. 1.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The invention relates to a fixing system of a photovoltaic inverter. For example, photovoltaic inverter's rigid coupling system includes installation frame, photovoltaic board, rigid coupling subassembly and dc-to-ac converter, and the lower part of installation frame is formed with the holder, is formed with the centre gripping groove in the holder, and the protruding mounting panel that is equipped with in upper portion of installation frame, one side that the installation frame deviates from the mounting panel is fixed with the locating frame and supports the frame, and the locating frame is located the top of supporting the frame, supports to be formed with the grafting clearance between frame and the locating frame. For example, the photovoltaic panel is inserted and fixed in the clamping groove, the fixed connection assembly comprises an insertion frame, a buckling frame, a grounding screw, a jacking screw, a cable frame and an ellipsoid shell, the insertion frame is sleeved and fixed at the end part of the mounting plate, and the buckling frame is convexly arranged on the insertion frame and extends towards the positioning frame. For example, the end of the fastening frame forms a reverse fastening plate, the reverse fastening plate is inserted into the insertion gap, the grounding screw penetrates through the top of the fastening frame and is screwed into the positioning frame, and the lower periphery of the grounding screw is convexly provided with a grounding ring. For example, the grounding ring is used for rubbing the oxide film at the corner of the mounting frame to be in abutting contact with the inner material at the corner so as to realize grounding connection of the mounting frame, and the abutting screw is screwed in the abutting frame. For example, the top end of the jacking screw props against the top of the jacking frame to be warped upwards so as to prop against the lower surface of the reverse buckling plate, the cable frame is formed at the bottom of the inserting frame and props against the upper surface of the photovoltaic panel, and the cross section of the ellipsoidal shell is in an elliptical ring shape. For example, the bottom of the ellipsoidal shell is connected to the upper surface of the clamping member, and the side wall of the cable frame abuts against one side of the ellipsoidal shell, so that the top of the ellipsoidal shell is forced to arch upwards to abut against the bottom of the inserting frame. For example, the inverter is mounted on a side of the insertion frame away from the positioning frame.

Referring to fig. 1 and 2, a fastening system of a photovoltaic inverter includes a mounting frame 10, a photovoltaic panel 20, a fastening assembly 30 and an inverter 40, a clamping member 11 is formed at a lower portion of the mounting frame 10, a clamping groove 12 is formed in the clamping member 11, a mounting plate 13 is protruded at an upper portion of the mounting frame 10, a positioning frame 14 and an abutting frame 16 are fixed at a side of the mounting frame 10 away from the mounting plate 13, the positioning frame 14 is located above the abutting frame 16, an inserting gap 15 is formed between the abutting frame 16 and the positioning frame 14, the photovoltaic panel 20 is inserted and fixed in the clamping groove 12, the fastening assembly 30 includes an inserting frame 31, a fastening frame 32, a grounding screw 33, an abutting screw 34, a cable frame 35 and an ellipsoidal shell member 36, the inserting frame 31 is sleeved and fixed at an end portion of the mounting plate 13, the fastening frame 32 is protruded on the inserting frame 31 and extends toward the positioning frame 14, an end portion of the fastening frame 32 forms a reverse fastening plate 325, the reverse buckling plate 325 is inserted into the inserting gap 15, the grounding screw 33 is inserted into the top of the buckling frame 32 and screwed into the positioning frame 14, the grounding ring 335 is convexly arranged on the lower periphery of the grounding screw 33, the grounding ring 335 is used for rubbing the oxide film at the corner of the mounting frame 10 to be in abutting contact with the inner side material at the corner so as to realize grounding connection of the mounting frame 10, the abutting screw 34 is screwed into the abutting frame 16, the top end of the abutting screw 34 abuts against the top of the abutting frame 16 to be warped upwards so as to abut against the lower surface of the reverse buckling plate 325, the cable frame 35 is formed at the bottom of the inserting frame 31 and abuts against the upper surface of the photovoltaic panel 20, the cross section of the ellipsoid casing 36 is in an elliptical ring shape, the bottom of the ellipsoid casing 36 is connected to the upper surface of the clamping member 11, the side wall of the cable frame 35 abuts against one side of the ellipsoid casing 36 so as to force the top of the ellipsoid casing 36 to be arched upwards so as to abut against the bottom of the inserting frame 31, the inverter 40 is mounted on the side of the insertion frame 31 remote from the positioning frame 14.

In the fastening system of the photovoltaic inverter, the grounding screw 33 is inserted into the top of the fastening frame 32 and screwed into the positioning frame 14, the grounding ring 335 is protruded from the lower periphery of the grounding screw 33, and the grounding ring 335 is used for rubbing the oxide film at the corner of the mounting frame 10 to be in contact with the inner material at the corner, so as to achieve grounding connection of the mounting frame 10. Sheltered from through buckled frame 32, consequently make the bight of installation frame 10 can avoid the rainwater to corrode, avoid the regeneration of oxide film, improved ground connection's stability. In addition, in the process of fixing the fastening frame 32 by the grounding screw 33, the oxide film on the corner surface of the mounting frame 10 can be removed by friction, so that the grounding connection can be realized. The arrangement of the ellipsoidal shell 36 facilitates the use of the side wall of the cable frame 35 to abut against one side of the ellipsoidal shell 36 after installation, so as to force the top of the ellipsoidal shell 36 to arch upwards to abut against the bottom of the inserting frame 31, thereby improving the inserting stability of the inserting frame 31. The top of the propping frame 16 is convenient for pressing the reverse buckling plate 325 by the top of the propping frame 16, thereby avoiding the damage caused by the direct contact of the top end of the propping screw and the propping of the reverse buckling plate 325.

For example, to facilitate the installation of the ellipsoidal shell 36, the clamping member 11 includes an upper plate 111, a lower plate 112 and a longitudinal plate 113, the upper plate 111 and the lower plate 112 are parallel to each other and both are vertically protruded on the sidewall of the longitudinal plate 113, the clamping groove 12 is formed between the upper plate 111 and the lower plate 112, and the end surface of the photovoltaic panel 20 abuts against the sidewall of the longitudinal plate 113. The longitudinal plate 113 extends upwards, the mounting plate 13 is transversely protruded at the top end of the longitudinal plate 113 and is positioned above the upper plate 111, a clamping space 135 is formed between the mounting plate 13 and the upper plate 111, the ellipsoid casing member 36 is positioned in the clamping space 135, and the positioning frame 14 and the abutting frame 16 are both fixed on one side of the longitudinal plate 113, which is far away from the ellipsoid casing member 36. The inserting frame 31 includes a fixing plate 313 and an inserting sleeve 315, the inserting sleeve 315 is fixed on the end of the mounting plate 13, the fixing plate 313 is protruded on one side of the inserting sleeve 315 far away from the longitudinal plate 113, and the inverter 40 is installed on the end of the fixing plate 313. By forming the holding space 135 between the mounting plate 13 and the upper plate 111, the ellipsoidal shell 36 is located in the holding space 135, thereby facilitating the mounting of the ellipsoidal shell 36 in the holding space 135.

For example, in order to improve the sealing performance of the clamping space 135, an L-shaped flexible plate 165 is formed on the upper portion of the abutting frame 16, the upper surface of the L-shaped flexible plate 165 forms the side wall of the inserting gap 15, the top end of the abutting screw 34 abuts against the lower surface of the L-shaped flexible plate 165, the outer diameter of the grounding ring 335 is gradually reduced along the vertical downward direction, and the grounding ring 335 abuts against the connecting portion of the friction longitudinal plate 113 and the mounting plate 13. The one end that vertical board 113 was kept away from to upper plate 111 is provided with rubber pole 116, and cable frame 35 includes connecting plate 351 and main frame body 353, and connecting plate 351 is perpendicular protruding to be located on solid connecting plate 313, and main frame body 353 forms in the bottom of connecting plate 351 and pastes and establishes the upper surface that supports in photovoltaic board 20, and ellipsoid shell 36 is held in the middle part of connecting plate 351, and rubber pole 116 is held in the bottom of connecting plate 351. By providing the connecting plate 351 and the rubber rod 116, the clamping space 135 can be blocked by the connecting plate 351, and the rubber rod 116 is pressed by the connecting plate 351 to further seal the clamping space 135.

For example, in order to keep the position of the cable frame 35, so as to avoid being blown by typhoon and keep the ellipsoidal shell 36 against the plug bush 315 for positioning, a sliding groove 3255 is concavely arranged on the bottom surface of the reverse buckling plate 325, the sliding groove 3255 penetrates through the surface of one side of the reverse buckling plate 325 away from the longitudinal plate 113, a first rectangular through hole is formed in the ellipsoidal shell 36 in a penetrating manner, a second rectangular through hole is formed in the cable frame 35 in a penetrating manner, and the first rectangular through hole is correspondingly communicated with the second rectangular through hole.

The fixing component 30 further includes an L-shaped inserting rod 37, the L-shaped inserting rod 37 includes a first rectangular rod portion 373 and a second rectangular rod portion 375 that are vertically connected to each other, the first rectangular rod portion 373 is inserted into the first rectangular through hole and the second rectangular through hole, and the top end of the second rectangular rod portion 375 is clamped in the sliding groove 3255 and upwardly supports the reverse buckling plate 325. By forming the first and second rectangular through holes, the L-shaped insertion rod 37 can be inserted to maintain the position of the cable frame 35 and the position of the ellipsoidal shell 36, so as to ensure that the cable frame is not disturbed by typhoons, and the ellipsoidal shell 36 keeps supporting the positioning insertion sleeve 315 upwards, so as to ensure that the insertion sleeve 315 does not move laterally to separate from the mounting plate 13 under the action of typhoons. For example, the ellipsoidal shell 36 is flat at the beginning, and after the connecting plate 351 deforms and becomes round against the ellipsoidal shell 36, the first rectangular through hole on the ellipsoidal shell is lifted to align with the second rectangular through hole, and then the L-shaped insertion rod 37 is inserted, so that the upward holding force of the ellipsoidal shell 36 can be ensured by the L-shaped insertion rod 37, and simultaneously, the restoring force of the ellipsoidal shell 36 can be applied to the cable frame 35, so that the cable frame 35 stably holds against the upper surface of the photovoltaic panel 20. And the second rectangular bar portion 375 can be upwardly supported to position the reverse buckling plate 325, thereby achieving multiple purposes.

For example, a second rectangular through hole penetrates through the connecting plate 351 and the main frame 353, a protrusion 118 is convexly arranged on one side of the longitudinal plate 113, which is away from the positioning frame 14, an arc-shaped concave surface is formed on one side of the protrusion 118, the arc-shaped concave surface is attached to the surface of the ellipsoidal shell 36, a middle through hole is penetrated through the protrusion 118, and the middle through hole penetrates through the lower portion of the abutting frame 16 and is aligned with the first rectangular through hole. The major axis direction of the ellipsoidal shell 36 is parallel to the fixed connection plate 313, and the first rectangular rod portion 373 is used for keeping the ellipsoidal shell 36 against the plug sleeve 315 upwards and transmitting the restoring force of the ellipsoidal shell 36 to the cable frame 35 so that the cable frame 35 presses the upper surface of the photovoltaic panel 20 downwards. By arranging the L-shaped inserting rod 37, multiple purposes can be achieved. For example, the snap frame 32 and the mounting frame 10 are made of a metal material, such as an aluminum alloy material.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A fixed connection system of a photovoltaic inverter is characterized by comprising an installation frame, a photovoltaic panel, a fixed connection assembly and an inverter, wherein a clamping piece is formed at the lower part of the installation frame, a clamping groove is formed in the clamping piece, an installation plate is convexly arranged at the upper part of the installation frame, a positioning frame and a top supporting frame are fixed at one side of the installation frame, which is far away from the installation plate, the positioning frame is positioned above the top supporting frame, an inserting gap is formed between the top supporting frame and the positioning frame, the photovoltaic panel is inserted and fixed in the clamping groove, the fixed connection assembly comprises an inserting frame, a buckling frame, a grounding screw, a top supporting screw, a cable frame and an ellipsoid housing piece, the inserting frame is sleeved and fixed at the end part of the installation plate, the buckling frame is convexly arranged on the inserting frame and extends towards the positioning frame, a reverse buckling plate is formed at the end part of the buckling frame, the reverse buckling plate is inserted and arranged in the, the periphery of the lower part of the grounding screw is convexly provided with a grounding ring, the grounding ring is used for rubbing an oxide film at the corner part of the installation frame to be in abutting contact with an inner side material at the corner part so as to realize grounding connection of the installation frame, the abutting screw is screwed in the abutting frame, the top end of the abutting screw abuts against the top of the abutting frame and is warped upwards so as to abut against the lower surface of the reverse buckling plate, the cable frame is formed at the bottom of the inserting frame and abuts against the upper surface of the photovoltaic panel, the cross section of the ellipsoidal shell is in an elliptical ring shape, the bottom of the ellipsoidal shell is connected to the upper surface of the clamping piece, the side wall of the cable frame abuts against one side of the ellipsoidal shell so as to force the top of the ellipsoidal shell to be arched upwards so as to abut against the bottom of the inserting frame, and the inverter is installed at one side of the inserting;

the clamping piece comprises an upper plate, a lower plate and a longitudinal plate, the upper plate and the lower plate are arranged in parallel and vertically and convexly arranged on the side wall of the longitudinal plate, a clamping groove is formed between the upper plate and the lower plate, the end surface of the photovoltaic plate is abutted against the side wall of the longitudinal plate, the longitudinal plate extends upwards, the mounting plate is transversely and convexly arranged at the top end of the longitudinal plate and is positioned above the upper plate, a clamping space is formed between the mounting plate and the upper plate, the ellipsoidal shell piece is positioned in the clamping space, the positioning frame and the abutting frame are both fixed at one side of the longitudinal plate, which is away from the ellipsoidal shell piece, the inserting frame comprises a fixing plate and an inserting sleeve, the inserting sleeve is fixedly arranged at the end part of the mounting plate, the fixing plate is convexly arranged at one side of the inserting sleeve, which is far away from the longitudinal plate, the inverter is arranged at the end part of the fixing plate, an L-shaped flexible plate is formed at the upper part of the abutting frame, the upper surface of, the outer diameter of the grounding ring is gradually reduced along the vertical downward direction, the grounding ring is abutted against the joint of the friction longitudinal plate and the mounting plate, one end of the upper plate, which is far away from the longitudinal plate, is provided with a rubber rod, the cable frame comprises a connecting plate and a main frame body, the connecting plate is vertically and convexly arranged on the fixing plate, the main frame body is formed at the bottom end of the connecting plate and is attached to and supported on the upper surface of the photovoltaic plate, the middle part of the connecting plate is abutted against an ellipsoid shell member, the bottom end of the connecting plate is abutted against the rubber rod, the bottom surface of the reverse buckling plate is concavely provided with a sliding groove, the sliding groove penetrates through one side surface of the reverse buckling plate, which is far away from the longitudinal plate, a first rectangular through hole is formed in the ellipsoid shell member in a penetrating manner, a second rectangular through hole is formed in the cable frame, the first rectangular through hole is correspondingly communicated with the second rectangular through hole, the fixing assembly further comprises an L-shaped insertion rod, the L-shaped insertion rod comprises, the top end of the second rectangular rod part is clamped in the sliding groove and upwards supports the reverse buckling plate, a second rectangular through hole penetrates through the connecting plate and the main frame body, a protruding block is convexly arranged on one side, away from the positioning frame, of the longitudinal plate, an arc-shaped concave surface is formed on one side of the protruding block, the arc-shaped concave surface is attached to the surface of the ellipsoid shell, a middle through hole is formed in the protruding block in a penetrating mode, the middle through hole penetrates through the lower portion of the support frame and is aligned with the first rectangular through hole, the long axis direction of the ellipsoid shell is parallel to the fixed connecting plate, the first rectangular rod part is used for enabling the ellipsoid shell to upwards support the inserting sleeve, and restoring force of the ellipsoid shell is transmitted to the cable frame to enable the cable frame to downwards press the upper.