A distributed photovoltaic inverter test device

Abstract

The present invention relates to the field of electrical equipment measurement technology, and more specifically, to a distributed photovoltaic inverter test device, comprising a portable tool box and two wiring devices arranged in parallel inside the portable tool box, wherein the portable tool box comprises a fixed box body and a comprehensive analyzer arranged inside the fixed box body. When the distributed photovoltaic inverter test device is used, the crocodile wire clip is pulled to drive the rotating wire tube to rotate through the connecting wire, and the interface of the plug connector and the comprehensive analyzer can be fixed by cooperating with the connecting mechanism, thereby improving the automation degree of the test device and simplifying the preparation work before the test.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment measurement, and in particular to a distributed photovoltaic inverter testing device. Background Art

[0002] The distributed photovoltaic inverter test device is mainly composed of a photovoltaic simulation DC power supply, a grid characteristic simulation AC power supply, an anti-islanding detection device, a photovoltaic grid-connected inverter to be tested, and a test control system. The device can comprehensively detect various performance indicators of the inverter. The distributed photovoltaic inverter test device is widely used in the installation, commissioning, operation and maintenance of photovoltaic systems.

[0003] The patent with application number CN202321761716.4 discloses a photovoltaic inverter test device based on the Internet of Things, including a shell and an inverter body. A test cavity is opened at the bottom of the shell, and the inverter body is placed in the corresponding test cavity. A display screen is installed on the top of the front end of the shell, and a terminal block is installed on the top wall of the test cavity. The detection circuit at the bottom of the terminal block is connected to the terminal at the rear end of the inverter body, and the leakage protection terminal on the right side of the terminal block is connected to the terminal of the inverter body. Fixed push rods are symmetrically installed on the inner walls of the left and right sides of the test cavity, and leakage sensors are installed on the ends of the fixed push rods to prevent leakage current from damaging the components of the test device and complete the leakage test of the photovoltaic inverter at the same time.

[0004] However, the existing equipment has obvious cumbersome operation problems before testing. It is necessary to manually connect the test device to the inverter and the comprehensive analyzer one by one. The whole process has many steps and is time-consuming. After the test, the equipment lacks an effective automatic sorting and reset mechanism. The operator has to manually sort and reel up the connecting wires, which is not only time-consuming and labor-intensive, but also easily causes the connecting wires to scatter or be improperly placed, which in turn brings many safety hazards, such as tripping operators, damaging equipment or destroying the cleanliness of the working environment.

[0005] In view of this, we propose a distributed photovoltaic inverter test device. Summary of the invention

[0006] The purpose of the present invention is to provide a distributed photovoltaic inverter testing device to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A distributed photovoltaic inverter test device comprises a portable tool box and two wiring devices arranged in parallel inside the portable tool box, wherein the portable tool box comprises a fixed box body and a comprehensive analyzer arranged inside the fixed box body;

[0009] The wiring device includes a moving box, a rotating mechanism arranged inside the moving box, a connecting mechanism arranged on one side of the rotating mechanism, and a limiting mechanism arranged on the other side of the rotating mechanism;

[0010] The rotating mechanism includes a rotating wire tube, a connecting wire wound around the outer side of the rotating wire tube, a worm that rotates along with the rotating wire tube, an alligator wire clip arranged at one end of the connecting wire, and a reset part that rotates in coordination with the rotating wire tube;

[0011] The reset part includes a connecting wheel, a ring gear arranged on the outer ring wall of the connecting wheel, a spiral spring arranged on the inner side of the connecting wheel, and a fixed round rod arranged inside the spiral spring;

[0012] The connecting mechanism includes a screw that rotates as the worm rotates, a moving slider that moves as the screw rotates, and a plug connector that moves together with the moving slider.

[0013] The limiting mechanism includes a movable horizontal plate, a plurality of pressure springs regularly arranged below the movable horizontal plate, limiting convex teeth for limiting the connecting wheel through an annular gear, and a pressing block for driving the movable horizontal plate to move.

[0014] In the technical solution of the present invention, the fixed box includes a placement frame and a flap hinged on the outside of the frame. Two parallel limiting slide grooves are provided on the top surface of the placement frame in the fixed box. The comprehensive analyzer is fixedly connected to the inside of the placement frame in the fixed box by screws.

[0015] In the technical solution of the present invention, the movable box includes a fixed box body, a partition plate hot-melt-connected to the inner wall of the fixed box body, two limiting slides integrally formed on the bottom surface of the fixed box body, and two inner convex plates hot-melt-connected to the groove walls on both sides of the front groove of the fixed box body. A connecting groove connected to the front groove is provided on the top surface of the fixed box body, and the size of the limiting slide is adapted to the size of the limiting slide.

[0016] In the technical solution of the present invention, one end of the rotating wire tube is rotatably connected to the inner wall of the fixed box body, and the other end is rotatably connected to the inside of the partition plate. A wire entry hole that passes through the inside and outside is opened on the outer wall of the rotating wire tube near the front end, and the connecting wire is wrapped around the outside of the rotating wire tube.

[0017] In the technical solution of the present invention, the worm is hot-melt connected to the rear end side wall of the rotating wire tube, and a connecting hole that passes through the front and back is opened inside the worm. One end of the connecting wire is fixedly connected to the crocodile wire clamp by a screw, and the end of the other end extends to the outside of the connecting hole.

[0018] In the technical solution of the present invention, the connecting wheel is clamped and fixed to the front end side wall of the rotating wire tube, the ring gear is clamped and fixed to the connecting wheel, the outer end of the spiral spring is hot-melt connected to the inner ring wall of the connecting wheel, the inner end of the spiral spring is hot-melt connected to the outer wall of the fixed round rod, and the front end of the fixed round rod is clamped and fixed to the inner wall of the fixed box body.

[0019] In the technical solution of the present invention, the left and right ends of the screw rod are respectively rotatably connected to the inner walls on the left and right sides of the fixed box body, and the outer wall of the screw rod is fixedly connected to a worm wheel meshing with the worm rod through a bayonet pin, and the movable slider is threadedly connected to the screw rod and slidably connected to the inside of the fixed box body.

[0020] In the technical solution of the present invention, a clamping protrusion is integrally formed on the top surface of the movable slider, the plug connector is clamped and fixed inside the clamping protrusion, one end of the plug connector extends to the outer wall of the fixed box body, and a docking connector is connected between the other end of the plug connector and the end of the connecting line.

[0021] In the technical solution of the present invention, the movable horizontal plate is slidably connected to the inner groove wall of the groove on the front side of the fixed box body, one end of the pressure spring is adhered to the bottom surface of the movable horizontal plate, and the other end is adhered to the inner top surface of the fixed box body, and the elastic force provided by the pressure spring pushes the movable horizontal plate to move upward.

[0022] In the technical solution of the present invention, the limiting protrusion is welded and fixed on the top surface of the movable horizontal plate, the longitudinal section of the limiting protrusion is a right-angled trapezoid, and a fixed round rod is clamped and fixed between the movable horizontal plate and the pressing block.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. When using the distributed photovoltaic inverter test device, the crocodile wire clip is pulled to drive the rotating wire tube to rotate through the connecting wire. The plug connector and the interface of the comprehensive analyzer can be fixed by cooperating with the connecting mechanism, thereby improving the automation degree of the test device and simplifying the preparation work before the test.

[0025] 2. After the test of the distributed photovoltaic inverter test device, the position of the movable horizontal plate can be changed by pressing the block, so that the relative position of the limit convex tooth and the reset part is changed, and then the rotating wire tube is driven to rotate by the reset part, so that the connecting wire is rewound to the outside of the rotating wire tube. The automatic rewinding method saves manual sorting time and avoids the safety hazards caused by the scattered connecting wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the portable tool box of the present invention;

[0028] Figure 3 It is a schematic cross-sectional view of the structure of the wiring device in the present invention;

[0029] Figure 4 It is one of the schematic cross-sectional views of the structure of the mobile box in the present invention;

[0030] Figure 5 This is the second schematic diagram of the structural section of the mobile box in the present invention;

[0031] Figure 6 It is a structural schematic diagram of the rotating mechanism in the present invention;

[0032] Figure 7 It is a partial structural cutaway schematic diagram of the rotating mechanism in the present invention;

[0033] Figure 8 It is a structural schematic diagram of the reset part in the present invention;

[0034] Fig. 9 It is a structural schematic diagram of the connecting mechanism in the present invention;

[0035] Fig.10 It is a structural schematic diagram of the limiting mechanism in the present invention;

[0036] Description of reference numerals:

[0037] 100. Portable tool box; 110. Fixed box; 111. Limiting slide; 120. Comprehensive analyzer;

[0038] 200, wiring device; 210, moving box; 211, fixed box body; 2110, connecting groove; 212, partition plate; 213, limit slide; 214, inner convex plate; 220, rotating mechanism; 221, rotating wire tube; 2210, wire entry hole; 222, connecting wire; 223, worm; 2230, connecting hole; 224, alligator wire clip; 225, reset part; 2250, connecting wheel; 22 51. Ring gear; 2252. Scroll spring; 2253. Fixed round rod; 230. Connecting mechanism; 231. Screw rod; 232. Worm gear; 233. Moving slider; 234. Clamping convex block; 235. Plug connector; 236. Butt connector; 240. Limiting mechanism; 241. Moving cross plate; 242. Pressure spring; 243. Limiting convex tooth; 244. Connecting round rod; 245. Pressing block. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 10 As shown, this embodiment provides a technical solution:

[0041] A distributed photovoltaic inverter test device includes a portable tool box 100 and two wiring devices 200 arranged in parallel inside the portable tool box 100. The portable tool box 100 includes a fixed box body 110 and a comprehensive analyzer 120 arranged inside the fixed box body 110.

[0042] In the present invention, the fixed box 110 includes a placement frame and a flip cover hinged on the outside of the frame. Two parallel limiting slide grooves 111 are provided on the top surface of the placement frame in the fixed box 110. The comprehensive analyzer 120 is fixedly connected to the inside of the placement frame in the fixed box 110 by screws.

[0043] Furthermore, the fixed box 110 is used to increase the placement area for the comprehensive analyzer 120 and the wiring device 200 , and the limiting slide groove 111 is used to limit the movement area of ​​the wiring device 200 .

[0044] In this embodiment, Figure 3-Figure 5 As shown, the wiring device 200 includes a moving box 210, a rotating mechanism 220 disposed inside the moving box 210, a connecting mechanism 230 disposed on one side of the rotating mechanism 220, and a limiting mechanism 240 disposed on the other side of the rotating mechanism 220;

[0045] Specifically, the mobile box 210 includes a fixed box body 211, a partition plate 212 hot-melt-connected to the inner wall of the fixed box body 211, two limiting slides 213 integrally formed on the bottom surface of the fixed box body 211, and two inner convex plates 214 hot-melt-connected to the groove walls on both sides of the front groove of the fixed box body 211. A connecting groove 2110 connected to the front groove is provided on the top surface of the fixed box body 211, and the size of the limiting slide 213 is adapted to the size of the limiting slide 111.

[0046] Furthermore, the fixed box body 211 is used to ensure the overall structural strength of the mobile box 210, the connecting groove 2110 is used to provide a passage range for the structure in the limiting mechanism 240, the partition plate 212 is used to provide a transmission range for the structure in the rotating mechanism 220, the limiting slide 213 is used to cooperate with the limiting slide groove 111 to limit the moving range of the mobile box 210, and the inner convex plate 214 is used to limit the moving range of the internal structure of the limiting mechanism 240.

[0047] In this embodiment, Figure 6-Figure 8 As shown, the rotating mechanism 220 includes a rotating wire tube 221, a connecting wire 222 wound around the outer side of the rotating wire tube 221, a worm 223 rotating along with the rotating wire tube 221, an alligator wire clip 224 disposed at one end of the connecting wire 222, and a reset portion 225 rotating in cooperation with the rotating wire tube 221;

[0048] Specifically, the reset portion 225 includes a connecting wheel 2250 , a ring gear 2251 disposed on the outer ring wall of the connecting wheel 2250 , a spiral spring 2252 disposed on the inner side of the connecting wheel 2250 , and a fixed round rod 2253 disposed inside the spiral spring 2252 .

[0049] Furthermore, one end of the rotating wire tube 221 is rotatably connected to the inner wall of the fixed box body 211, and the other end is rotatably connected to the inside of the partition plate 212. A wire entry hole 2210 that passes through the inside and outside is opened on the outer wall of the rotating wire tube 221 near the front end, and the connecting wire 222 is wrapped around the outside of the rotating wire tube 221.

[0050] Furthermore, the worm 223 is hot-melt connected to the rear end side wall of the rotating wire tube 221, and a connecting hole 2230 is opened inside the worm 223 to pass through the front and back. One end of the connecting wire 222 is fixedly connected to the crocodile wire clamp 224 by screws, and the end of the other end extends to the outside of the connecting hole 2230.

[0051] Furthermore, the connecting wheel 2250 is clamped and fixed to the front end side wall of the rotating wire tube 221, the ring gear 2251 is clamped and fixed to the connecting wheel 2250, the outer end of the spiral spring 2252 is hot-melt connected to the inner ring wall of the connecting wheel 2250, the inner end of the spiral spring 2252 is hot-melt connected to the outer wall of the fixed round rod 2253, and the front end of the fixed round rod 2253 is clamped and fixed to the inner wall of the fixed box body 211.

[0052] Furthermore, the end of the connecting wire 222 enters from the wire entry hole 2210 on the rotating wire tube 221 and passes through the connecting hole 2230 of the worm 223. When in use, the crocodile wire clip 224 is pulled to drive the rotating wire tube 221 to rotate through the connecting wire 222. In the process of continuously pulling out the crocodile wire clip 224, the worm 223 as a whole also rotates with the rotating wire tube 221.

[0053] When the rotating wire tube 221 rotates, the connecting wheel 2250 is driven to rotate, causing the spiral spring 2252 to bend, thereby increasing the elastic potential energy of the spiral spring 2252. The fixed round rod 2253 is used to ensure that the position of the inner end of the spiral spring 2252 does not change.

[0054] In this embodiment, Fig. 9 As shown, the connection mechanism 230 includes a screw rod 231 that rotates as the worm 223 rotates, a moving slider 233 that moves as the screw rod 231, and a plug connector 235 that moves together with the moving slider 233;

[0055] Specifically, the left and right ends of the screw rod 231 are rotatably connected to the inner walls of the left and right sides of the fixed box body 211 respectively, and the outer wall of the screw rod 231 is fixedly connected with a worm wheel 232 meshing with the worm 223 through a pin, and the movable slider 233 is threadedly connected to the screw rod 231 and slidably connected to the inside of the fixed box body 211.

[0056] Furthermore, a clamping protrusion 234 is integrally formed on the top surface of the movable slider 233, and the plug connector 235 is clamped and fixed inside the clamping protrusion 234. One end of the plug connector 235 extends to the outer wall of the fixed box body 211, and a docking connector 236 is connected between the other end of the plug connector 235 and the end of the connecting line 222.

[0057] Furthermore, when the worm 223 rotates, it cooperates with the worm wheel 232 to drive the lead screw 231 to rotate, so that the movable slider 233 and the clamping protrusion 234 are positioned in the fixed box body 211, and the plug connector 235 is inserted into the interface on the comprehensive analyzer 120.

[0058] In this embodiment, Fig.10 As shown, the limiting mechanism 240 includes a moving horizontal plate 241, a plurality of pressure springs 242 regularly arranged below the moving horizontal plate 241, a limiting convex tooth 243 for limiting the connecting wheel 2250 through a ring gear 2251, and a pressing block 245 for driving the moving horizontal plate 241 to move;

[0059] Specifically, the movable horizontal plate 241 is slidably connected to the inner groove wall of the groove on the front side of the fixed box body 211, one end of the pressure spring 242 is adhered to the bottom surface of the movable horizontal plate 241, and the other end is adhered to the inner top surface of the fixed box body 211. The elastic force provided by the pressure spring 242 pushes the movable horizontal plate 241 to move upward.

[0060] Furthermore, the limiting protruding teeth 243 are welded and fixed on the top surface of the movable horizontal plate 241 , and the longitudinal section of the limiting protruding teeth 243 is a right-angled trapezoid. A connecting round rod 244 is clamped and fixed between the movable horizontal plate 241 and the pressing block 245 .

[0061] Furthermore, the pressing block 245 is pressed downward to move it downward in the connecting groove 2110, and the position of the movable cross plate 241 is driven downward by the connecting round rod 244, thereby changing the relative position of the limiting convex tooth 243 and the annular gear 2251 in the reset portion 225. At this time, the connecting wheel 2250 will rotate under the elastic force of the spiral spring 2252, thereby driving the rotating wire tube 221 to rotate.

[0062] When the distributed photovoltaic inverter test device of the present invention is used, first, the flip cover in the fixed box 110 is opened, and the positions of the two wiring devices 200 and the comprehensive analyzer 120 are changed according to the items to be tested;

[0063] Then, the alligator clip 224 is pulled to drive the rotating wire tube 221 to rotate through the connecting wire 222. In the process of continuously pulling out the alligator clip 224, the worm 223 as a whole also rotates along with the rotating wire tube 221.

[0064] At this time, when the rotating wire tube 221 rotates, the connecting wheel 2250 is driven to rotate, and the spiral spring 2252 is bent, thereby increasing the elastic potential energy of the spiral spring 2252;

[0065] When the worm 223 rotates, it cooperates with the worm wheel 232 to drive the screw 231 to rotate, so that the movable slider 233 and the clamping protrusion 234 are positioned in the fixed box body 211, and then the plug connector 235 is inserted into the interface of the comprehensive analyzer 120;

[0066] Next, the alligator clip 224 is fixed to the interface on the photovoltaic inverter, and the comprehensive analyzer 120 is started to perform a line test on the distributed photovoltaic inverter;

[0067] Afterwards, when the test project is finished, the alligator clip 224 is separated from the interface on the photovoltaic inverter, and the pressing block 245 is pressed down, so that the position of the movable horizontal plate 241 is driven to move downward by the connecting round rod 244, thereby changing the relative position of the limiting convex tooth 243 and the ring gear 2251 in the reset part 225;

[0068] At this time, the connecting wheel 2250 rotates under the elastic force of the spiral spring 2252, so that the connecting wire 222 is rewound around the outer side of the rotating wire tube 221, and the screw rod 231 is rotated again, so that the position of the plug connector 235 is also restored;

[0069] Afterwards, after the alligator wire clip 224 is put back into the interior of the fixed box body 211 , the flip cover of the fixed box body 110 is closed, and the portable tool box 100 can be carried away from the test site.

[0070] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the specification and its equivalents.

Claims

1. A distributed photovoltaic inverter testing device, comprising a portable tool box (100) and two wiring devices (200) arranged in parallel inside the portable tool box (100), wherein the portable tool box (100) comprises a fixed box body (110) and a comprehensive analyzer (120) arranged inside the fixed box body (110); Features: The wiring device (200) comprises a moving box (210), a rotating mechanism (220) arranged inside the moving box (210), a connecting mechanism (230) arranged on one side of the rotating mechanism (220), and a limiting mechanism (240) arranged on the other side of the rotating mechanism (220); The rotating mechanism (220) comprises a rotating wire tube (221), a connecting wire (222) wound around the outside of the rotating wire tube (221), a worm (223) rotating along with the rotating wire tube (221), an alligator wire clip (224) arranged at one end of the connecting wire (222), and a reset portion (225) rotating in coordination with the rotating wire tube (221); The reset portion (225) comprises a connecting wheel (2250), a ring gear (2251) arranged on the outer ring wall of the connecting wheel (2250), a spiral spring (2252) arranged on the inner side of the connecting wheel (2250), and a fixed round rod (2253) arranged inside the spiral spring (2252); The connecting mechanism (230) comprises a screw rod (231) that rotates as the worm (223) rotates, a moving slider (233) that moves as the screw rod (231), and a plug connector (235) that moves together with the moving slider (233); The limiting mechanism (240) comprises a movable transverse plate (241), a plurality of pressure springs (242) regularly arranged below the movable transverse plate (241), limiting convex teeth (243) for limiting the connection wheel (2250) via a ring gear (2251), and a pressing block (245) for driving the movable transverse plate (241) to move.

2. The distributed photovoltaic inverter testing device according to claim 1, characterized in that: The fixed box (110) comprises a placement frame and a flip cover hinged on the outside of the frame, two parallel limiting slide grooves (111) are provided on the top surface of the placement frame in the fixed box (110), and the comprehensive analyzer (120) is fixedly connected to the inside of the placement frame in the fixed box (110) by screws.

3. The distributed photovoltaic inverter testing device according to claim 2, characterized in that: The movable box (210) comprises a fixed box body (211), a partition plate (212) connected to the inner wall of the fixed box body (211) by heat-melting, two limiting slide bars (213) integrally formed on the bottom surface of the fixed box body (211), and two inner convex plates (214) connected to the groove walls on both sides of the front groove of the fixed box body (211) by heat-melting. A connecting groove (2110) connected to the front groove is formed on the top surface of the fixed box body (211), and the size of the limiting slide bar (213) is adapted to the size of the limiting slide groove (111).

4. The distributed photovoltaic inverter testing device according to claim 2, characterized in that: One end of the rotating wire tube (221) is rotatably connected to the inner wall of the fixed box body (211), and the other end is rotatably connected to the inside of the partition plate (212). An inner and outer through-hole (2210) is provided on the outer wall of the rotating wire tube (221) near the front end, and the connecting wire (222) is wound around the outer side of the rotating wire tube (221).

5. The distributed photovoltaic inverter testing device according to claim 2, characterized in that: The worm (223) is hot-melt-connected to the rear end side wall of the rotating wire tube (221); a connecting hole (2230) is provided inside the worm (223) and passes through the front and rear ends; one end of the connecting wire (222) is fixedly connected to the alligator wire clip (224) by means of a screw, and the end of the other end extends to the outside of the connecting hole (2230).

6. The distributed photovoltaic inverter testing device according to claim 3, characterized in that: The connecting wheel (2250) is snap-fitted and fixed to the front end side wall of the rotating wire tube (221); the ring gear (2251) is snap-fitted and fixed to the connecting wheel (2250); the outer end of the spiral spring (2252) is hot-melt-connected to the inner ring wall of the connecting wheel (2250); the inner end of the spiral spring (2252) is hot-melt-connected to the outer side wall of the fixed round rod (2253); and the front end of the fixed round rod (2253) is snap-fitted and fixed to the inner side wall of the fixed box body (211).

7. The distributed photovoltaic inverter testing device according to claim 3, characterized in that: The left and right ends of the screw rod (231) are rotatably connected to the inner side walls of the left and right sides of the fixed box body (211), respectively; a worm wheel (232) meshing with the worm (223) is fixedly connected to the outer side wall of the screw rod (231) via a bayonet; and the movable slider (233) is threadedly connected to the screw rod (231) and slidably connected to the inside of the fixed box body (211).

8. The distributed photovoltaic inverter testing device according to claim 2, characterized in that: A clamping protrusion (234) is integrally formed on the top surface of the movable slider (233), the plug connector (235) is snap-fitted and fixed inside the clamping protrusion (234), one end of the plug connector (235) extends to the outer wall of the fixed box body (211), and a docking connector (236) is connected between the other end of the plug connector (235) and the end of the connecting line (222).

9. The distributed photovoltaic inverter testing device according to claim 2, characterized in that: The movable horizontal plate (241) is slidably connected to the inner groove wall of the groove on the front side of the fixed box body (211); one end of the pressure spring (242) is adhered to the bottom surface of the movable horizontal plate (241) and the other end is adhered to the inner top surface of the fixed box body (211); the elastic force provided by the pressure spring (242) pushes the movable horizontal plate (241) to move upward.

10. The distributed photovoltaic inverter testing device according to claim 2, characterized in that: The limiting protruding teeth (243) are welded and fixed on the top surface of the movable horizontal plate (241); the longitudinal section of the limiting protruding teeth (243) is a right-angled trapezoid; a connecting round rod (244) is clamped and fixed between the movable horizontal plate (241) and the pressing block (245).

Images