A fireproofing performance detection device for distributed photovoltaic modules

Abstract

This invention discloses a fire-retardant performance testing device for distributed photovoltaic modules, relating to the field of fire-retardant performance testing technology. It includes a support chamber, with a support frame fixedly installed on one side of the support chamber, a substrate fixedly installed on one side of the support frame, and an annular tube installed at an angle on one side of the support chamber. A rectifier is fixedly fitted onto the inner circular wall of the annular tube for rectifying the combustible gas of PMC fuel. Through the coordinated operation of an electromagnet, mounting frame, iron block, movable rod, extrusion head, arc plate, support roller, mounting box, spring, snap-fit ​​strip, snap-fit ​​seat, slot, drive motor, synchronous pulley, and synchronous belt, the tilt angles of the two sets of mounting frames and the photovoltaic panels can be adjusted. This ensures that the tilt angle of two photovoltaic panels in the same row during testing is the same as the actual tilt angle after installation, making the test more realistic and achieving the desired fire-retardant performance test effect for the photovoltaic panels.

Description

Technical Field

[0001] This invention relates to the field of fire resistance and flame retardancy performance testing technology, specifically to a fire resistance and flame retardancy performance testing device for distributed photovoltaic modules. Background Technology

[0002] Distributed photovoltaic (PV) modules are devices that directly convert solar energy into electrical energy using the photovoltaic effect. They are the core components of distributed PV power generation systems, primarily consisting of PV cells, encapsulation materials, junction boxes, and support structures. PV cells are typically made of silicon-based semiconductor materials (such as monocrystalline silicon, polycrystalline silicon, or amorphous silicon). When sunlight shines on the cell surface, photons excite electrons in the semiconductor, generating an electric current. Distributed PV systems are usually installed on building rooftops, walls, or other densely populated or flammable areas. In the event of a fire, the flame can spread rapidly, leading to severe property damage and personal injury. Fire resistance and flame retardancy testing can effectively assess the fire resistance of modules when exposed to external fire sources, reducing the risk of fire.

[0003] A search revealed problems with existing fire-retardant testing techniques for photovoltaic (PV) panels. During testing, individual PV panels are tested with flames. However, in actual installation, PV panels are mounted on supports, which are typically made of metal and have high thermal conductivity. This means that in a fire, heat generated by combustion on the supports is rapidly transferred to other parts of the PV panel, potentially causing localized overheating and affecting its performance and flame-retardant effect. Therefore, the impact of the supports on the PV panels must also be considered in fire-retardant testing. Secondly, PV panels are usually used in multiple units, making single-panel testing less effective. Furthermore, the spacing and installation angle between two PV panels in the same row also affect the test results. If the spacing between two PV panels is too small, the fire... Flames may spread more easily from one photovoltaic panel to another, leading to faster flame propagation. Conversely, if the interval is too large, flame propagation may be suppressed, and the test results may be biased towards a more difficult-to-burn scenario. Correspondingly, the installation angle of the photovoltaic panels affects the contact area between the flame and the panel. If the installation angle is small, the contact area between the flame and the panel is large, and combustion may be more complete. If the installation angle is large, the contact area between the flame and the panel is small, and combustion may be less complete. In summary, the spacing and installation angle of photovoltaic panels should be considered when conducting fire resistance and flame retardancy testing to be realistic. Therefore, based on the above research and combined with existing technologies, a fire resistance and flame retardancy performance testing device for distributed photovoltaic modules is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a fire-retardant performance testing device for distributed photovoltaic modules, which has the advantages of good testing effect, strong authenticity and high flexibility, so as to solve the problems mentioned in the background art, such as the heat transfer from the support to the photovoltaic panel affecting the testing, and the spacing and installation angle between two photovoltaic panels in the same row also affecting the testing.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A fire-retardant performance testing device for distributed photovoltaic modules includes: a support chamber, a support frame fixedly installed on one side of the support chamber, a substrate fixedly installed on one side of the support frame, an annular tube obliquely installed on one side of the support chamber, and a vortex fan rotatably connected to one side inside the support chamber; a rectifier, fixedly sleeved on the inner circular wall of the annular tube, for rectifying PMC fuel combustible gas; a nozzle, fixedly sleeved on the inner circular wall of the annular tube, for spraying PMC fuel combustible gas; and an ignition electrode, fixedly installed on the inner bottom surface of the support frame, for igniting... PMC fuel is combustible; the testing mechanism is located on the top surface of the substrate and is used to test the fire resistance and flame retardancy of the photovoltaic panel; the testing mechanism includes: a plurality of mounting holes, all of which are opened on the top surface of the substrate, a movable seat is provided inside the mounting hole, a limiting rod is fixedly installed inside the mounting hole, the limiting rod is slidably connected to the movable seat, a positioning block is fixedly installed on the top surface of the movable seat, a mounting frame is rotatably connected between every two positioning blocks, a plurality of round holes are opened on the bottom surface of the mounting frame, and heaters for heating are fixedly installed on both sides of the mounting frame.

[0007] Furthermore, the detection mechanism also includes a top plate, which is fixedly installed on one side of the base plate. A bidirectional lead screw is screwed onto each pair of movable seats. One end of the bidirectional lead screw passes through the top plate and is fixedly mounted with a synchronous pulley. A synchronous belt is rotatably connected to the outer circular walls of the two synchronous pulleys. A DC motor for driving the synchronous pulleys is installed on one side of the top plate. Two locking seats are provided on the bottom surface of the base plate. Two support beams are fixedly installed on the bottom surface of the base plate. A limiting frame is fixedly installed on the bottom surface of the support beams. The limiting frame is rotatably connected internally. There is a synchronous pulley 1, and a synchronous belt 1 is rotatably connected to the outer circular wall of the two synchronous pulleys 1. The synchronous belt 1 is fixedly connected to the locking seat. A drive motor for driving the synchronous pulleys 1 to rotate is installed on one side of the right-side limiting frame. Two movable holes are opened on the top surface of the base plate. Movable blocks are arranged inside the movable holes. Support rods are fixedly installed inside the movable holes. The support rods are slidably connected to the movable blocks. Two rotating blocks 2 are fixedly installed on the top surface of the movable blocks. Two rotating blocks 1 are fixedly installed on the bottom surface of the mounting frame. The two rotating blocks 1 rotate between each other. A connecting rod is movably connected, with its lower end rotatably connected to two rotating blocks. A fixed tube is fixedly installed on the bottom surface of the movable block, and an electromagnet is fixedly installed on the bottom surface of the movable block. An iron block is slidably connected inside the fixed tube, and a movable rod is fixedly installed on the bottom surface of the iron block. A partition is fixedly installed inside the fixed tube, and the lower end of the movable rod passes through the partition, with a pressing head fixedly installed on its bottom surface. A spring is fitted onto the outer circular wall of the movable rod. Connecting frames are fixedly installed on both sides of the fixed tube, and a base plate is fixedly installed between the two connecting frames. The top surface of the base plate... Several mounting boxes are fixedly installed. Support rollers are rotatably connected inside the mounting boxes. One end of each support roller passes through the mounting box and extends to the outside of the mounting box. A spring is wound around the outer circular wall of the support roller. An arc-shaped plate is fixedly installed between every two support rollers. Several snap-fit ​​strips are fixedly installed on the outer circular wall of the arc-shaped plate. Several snap-fit ​​slots are opened on both sides of the inside of the snap-fit ​​seat. The snap-fit ​​strips are movably snapped into the snap-fit ​​slots. A sliding groove is opened on the bottom surface of the snap-fit ​​seat. A slider is fixedly installed on the bottom surface of the base plate. The slider is slidably connected to the sliding groove.

[0008] Furthermore, a plurality of base blocks are fixedly installed on the bottom surface of the substrate, and a limit rod is fixedly installed between every two base blocks. Two limit blocks are fixedly installed on the top surface of the snap-fit ​​seat, and the limit blocks are slidably connected to the limit rods.

[0009] Furthermore, the interior of the support chamber is rotatably connected to several spoilers, one side of each spoiler is coaxially connected to a gear, and one side of the support chamber is slidably connected to a toothed plate, which meshes with the gear. One side of the support chamber is provided with a moving part for driving the toothed plate to move.

[0010] Furthermore, the moving component includes two fixed blocks, both of which are fixedly installed on one side of the support chamber. A lead screw is rotatably connected between the two fixed blocks. A connecting block is fixedly installed on one side of the toothed plate. The lead screw is threadedly connected to the connecting block. A positioning rod is fixedly installed between the two fixed blocks. The connecting block is slidably connected to the positioning rod. A DC motor for driving the lead screw to rotate is fixedly installed on the bottom surface of the lower fixed block.

[0011] Furthermore, support blocks for restricting the movement of the iron block are fixedly installed on both sides of the iron block, and support holes are opened on both sides of the fixed tube, with the support blocks slidably connected to the support holes.

[0012] Furthermore, a number of air intake holes are provided on one side of the support chamber for air intake, and a dust filter is installed on one side of the support chamber.

[0013] Furthermore, a guide seat is fixedly installed on the top surface of the substrate, and a fireproof plate for blocking flames is fixedly installed on the top surface of the movable seat.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. By cooperating with the mounting bracket, DC motor II, synchronous pulley II, synchronous belt II, bidirectional lead screw, and movable seat, the spacing between the two photovoltaic panels can be adjusted according to the actual installation situation, thereby enabling fire resistance and flame retardancy testing of the photovoltaic panels under the actual installation spacing conditions; by cooperating with the electromagnet, mounting bracket, iron block, movable rod, extrusion head, arc plate, support roller, mounting box, spring, snap-fit ​​strip, snap-fit ​​seat, snap-fit ​​groove, drive motor, synchronous pulley I, and synchronous belt I, the tilt angle of the two sets of mounting brackets and photovoltaic panels can be adjusted simultaneously, or the tilt angle of the two sets of mounting brackets and photovoltaic panels can be adjusted individually, so that the tilt angle of the two photovoltaic panels in the same row during testing is the same as the tilt angle after subsequent installation;

[0016] By using a combination of a support chamber, annular tube, rectifier, nozzle, ignition electrode, vortex fan, mounting bracket, and heater, two heaters can heat both sides of the photovoltaic panel to simulate the heating of the photovoltaic panel by the bracket during actual combustion. This further replicates the actual situation and achieves the desired fire resistance and flame retardancy test effect for the photovoltaic panel, which is helpful for testing the photovoltaic panel before installation and use.

[0017] 2. By cooperating with the DC motor, lead screw, connecting block, positioning rod, and toothed plate, the toothed plate can be driven to move. By cooperating with the toothed plate, gears, vortex fan, and spoiler, the airflow angle can be changed, thereby making the airflow direction conform to the actual wind direction and further improving the accuracy of fire-retardant testing of photovoltaic panels. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the connection structure between the support chamber and the vortex fan of the present invention;

[0020] Figure 3 This is a left-side view of the installation structure of the filter screen and support chamber of the present invention;

[0021] Figure 4 for Figure 3 A magnified schematic diagram of a portion of the structure of A in the diagram;

[0022] Figure 5 This is a cross-sectional schematic diagram of the connection structure between the annular tube and the nozzle of the present invention;

[0023] Figure 6 This is a schematic diagram of the connection structure between the mounting bracket and the substrate of the present invention;

[0024] Figure 7 for Figure 6 A magnified schematic diagram of a portion of the structure of B;

[0025] Figure 8 This is a bottom view schematic diagram of the connection structure between the movable seat and the base plate of the present invention;

[0026] Figure 9 for Figure 8 A magnified schematic diagram of a local structure of C;

[0027] Figure 10 This is a schematic diagram of the connection structure between the movable block and the fixed tube of the present invention;

[0028] Figure 11 This is a schematic diagram of the installation structure of the arc-shaped plate and the snap-fit ​​strip of the present invention;

[0029] Figure 12 This is a schematic diagram of the connection structure between the support roller and the mounting box of the present invention.

[0030] In the diagram: 1. Support chamber; 2. Support frame; 3. Base plate; 4. Detection mechanism; 5. Annular tube; 6. Vortex fan; 7. Filter screen; 8. Support hole; 9. Air inlet; 10. Mounting box; 11. Nozzle; 12. Ignition electrode; 13. Spring; 14. Support roller; 15. Toothed plate; 16. Gear; 17. Fixing block; 18. Connecting block; 19. Positioning rod; 20. DC motor one; 21. Spoiler plate; 22. Rectifier; 23. Limiting rod; 24. Mounting frame; 25. Heater; 26. Positioning block; 27. Mounting hole; 28. Movable seat; 29. ​​Fireproof plate; 30. Movable hole; 31. Movable block; 32. Support rod; 33. Rotating block one; 34. 35. Connecting rod; 36. Rotating block II; 37. Support beam; 38. Limiting frame; 39. Synchronous pulley I; 40. Drive motor; 41. Synchronous belt I; 42. Bidirectional lead screw; 43. Top plate; 44. DC motor II; 45. Synchronous pulley II; 46. Synchronous belt II; 47. Arc plate; 48. Snap-fit ​​seat; 49. Base block; 50. Limiting block; 51. Limiting rod; 52. Fixed tube; 53. Extrusion head; 54. Base plate; 55. Sliding block; 56. Slot; 57. Snap-fit ​​strip; 58. Electromagnet; 59. Iron block; 60. Support block; 61. Movable rod; 62. Spring; 63. Partition plate; 64. Connecting frame; 65. Lead screw; 66. Guide seat. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In one typical implementation of this application, please refer to Figures 1-12 A fire-retardant performance testing device for distributed photovoltaic modules includes a support chamber 1, a support frame 2 fixedly installed on one side of the support chamber 1, a base plate 3 fixedly installed on one side of the support frame 2, support legs fixedly installed on the bottom surface of the support chamber 1 and the bottom surface of the base plate 3, an annular tube 5 inclinedly installed on one side of the support chamber 1 via a connector, a vortex fan 6 rotatably connected to one side inside the support chamber 1, the inclination of the annular tube 5 is 127mm / 300mm, that is, the annular tube 5 is inclined at about 22.5 degrees, a rectifier 22 is fixedly sleeved on the inner circular wall of the annular tube 5 for rectifying the PMC fuel combustible gas, a nozzle 11 is fixedly sleeved on the inner circular wall of the annular tube 5 for spraying out the PMC fuel combustible gas, the gas is supplied through the rectifier 22 to ensure that the gas has a uniform speed and pressure distribution when entering the nozzle 11, and an ignition electrode 12 is fixedly installed on the inner bottom surface of the support frame 2 for igniting the PMC fuel combustible gas;

[0033] The testing mechanism 4 is set on the top surface of the substrate 3 and is used to test the fire resistance and flame retardancy of the photovoltaic panel. The testing mechanism 4 includes: several mounting holes 27, all of which are opened on the top surface of the substrate 3. A movable seat 28 is set inside the mounting hole 27. A limiting rod 23 is fixedly installed inside the mounting hole 27. The limiting rod 23 is slidably connected to the movable seat 28. The limiting rod 23 can limit the movement of the movable seat 28. A positioning block 26 is fixedly installed on the top surface of the movable seat 28. A mounting frame 24 is rotatably connected between every two positioning blocks 26 through a rotating shaft. Several round holes are opened on the bottom surface of the mounting frame 24. The photovoltaic panel to be tested can be fixed inside the mounting frame 24 by inserting bolts into the round holes. The mounting frame 24 is used to simulate the support used by the photovoltaic panel in actual use. The mounting frame 24 is made of ceramic material. Heaters 25 for heating are fixedly installed on both sides of the mounting frame 24.

[0034] In this process, PMC fuel combustible gas is introduced into the interior of the annular pipe 5. After being rectified by the rectifier 22, the PMC fuel combustible gas is sprayed out through the nozzle 11. The sprayed PMC fuel combustible gas ignites upon encountering the ignition electrode 12, generating a flame. At this time, the vortex fan 6 generates airflow to simulate the actual wind speed conditions. Under the action of the airflow, the flame is sprayed onto the photovoltaic panels inside the two mounting brackets 24 and burns. During this process, the heater 25 provides heating to the side of the photovoltaic panel to simulate the heating of the side of the photovoltaic panel after the bracket is heated in an actual fire. The test results are consistent with the actual use process.

[0035] In addition, the flow rates of PMC fuel combustible gas entering the annular pipe 5 are as follows: Class A&B: 21,000-22,000 Btu / min (369-387 kWh) for 10 minutes; Class C: 18,000-19,000 Btu / min (316-334 kWh) for 4 minutes; the wind speed of the vortex fan is 19±0.8 km / h (5.3±0.2 m / s).

[0036] The testing mechanism 4 also includes a top plate 42, which is fixedly installed on one side of the base plate 3. A double-acting screw 41 is screwed onto each pair of movable seats 28. One end of the double-acting screw 41 passes through the top plate 42 and is fixedly installed with a synchronous pulley 44. Two bearing seats are fixedly installed on one side of the base plate 3. The double-acting screw 41 is rotatably connected to the bearing seats, and the bearing seats support the double-acting screw 41.

[0037] Two synchronous pulleys 44 are rotatably connected to the outer circular walls of the two synchronous pulleys 44 by a synchronous belt 45. A DC motor 43 for driving the synchronous pulleys 44 is mounted on one side of the top plate 42 by a bracket. The drive shaft of the DC motor 43 is fixedly connected to one end of the synchronous pulley 44 located on the right side.

[0038] The two bidirectional lead screws 41 can be driven to rotate synchronously by the cooperation of DC motor 43, synchronous pulley 44 and synchronous belt 45. The rotation of the two bidirectional lead screws 41 causes the movable seat 28 to move on the bidirectional lead screws 41. The movement of the movable seat 28 drives the mounting frame 24 and the photovoltaic panel on it to move, so that the two sets of mounting frames 24 and photovoltaic panels move inward or outward synchronously, adjusting the spacing between two adjacent photovoltaic panels, simulating the spacing of photovoltaic panels after actual installation.

[0039] The bottom surface of the substrate 3 is provided with two snap-fit ​​seats 47. Two support beams 36 are fixedly installed on the bottom surface of the substrate 3. A limiting frame 37 is fixedly installed on the bottom surface of the support beams 36. A synchronous wheel 38 is rotatably connected inside the limiting frame 37 through a bearing. A synchronous belt 40 is rotatably connected to the outer circular wall of the two synchronous wheels 38. The synchronous belt 40 is fixedly connected to the snap-fit ​​seats 47 through a connector. A drive motor 39 for driving the synchronous wheel 38 to rotate is installed on one side of the right limiting frame 37. One end of the drive shaft of the drive motor 39 passes through the limiting frame 37 and is fixedly connected to one end of the synchronous wheel 38.

[0040] Among them, the drive motor 39 drives the synchronous pulley 38 to rotate, the rotation of the two synchronous pulleys 38 drives the bidirectional lead screw 41 to move, and the movement of the synchronous belt 40 drives the two locking seats 47 to move.

[0041] Two movable holes 30 are formed on the top surface of the substrate 3. A movable block 31 is disposed inside the movable hole 30. A support rod 32 is fixedly installed inside the movable hole 30. The support rod 32 is slidably connected to the movable block 31. The support rod 32 can restrict the movement of the movable block 31. Two rotating blocks 35 are fixedly installed on the top surface of the movable block 31. Two rotating blocks 33 are fixedly installed on the bottom surface of the mounting bracket 24. A connecting rod 34 is rotatably connected between the two rotating blocks 33 through a rotating shaft. The lower end of the connecting rod 34 is connected to the rotating shaft. The movable block 31 is rotatably connected to two rotating blocks 35. A fixed tube 51 is fixedly installed on the bottom surface of the movable block 31. An electromagnet 58 is fixedly installed on the bottom surface of the movable block 31. An iron block 59 is slidably connected inside the fixed tube 51. The electromagnet 58 can attract the iron block 59. A movable rod 61 is fixedly installed on the bottom surface of the iron block 59. A partition 63 is fixedly installed inside the fixed tube 51. The lower end of the movable rod 61 passes through the partition 63 and a pressing head 52 is fixedly installed on its bottom surface. The radius of the pressing head 52 gradually decreases from top to bottom. A spring 62 is fitted onto the outer circular wall of the moving rod 61. One end of the spring 62 is fixedly connected to the bottom surface of the partition plate 63, and the other end of the spring 62 is fixedly connected to the bottom surface of the iron block 59. Connecting brackets 64 are fixedly installed on both sides of the fixing tube 51. A base plate 53 is fixedly installed between two connecting brackets 64. Several mounting boxes 10 are fixedly installed on the top surface of the base plate 53. Support rollers 14 are rotatably connected inside the mounting boxes 10 via rotating shafts. One end of the support roller 14 passes through the mounting box 10 and extends to the outside of the mounting box 10. A spring 13 is wound around the outer circular wall of the support roller 14. One side of the spring 13 is fixedly connected to the inner circular wall of the mounting box 10, and the other side of the spring 13 is fixedly connected to the outer circular wall of the support roller 14. The spring 13 can provide the force required for the support roller 14 to reset. An arc plate 46 is fixedly installed between every two support rollers 14. Several snap-fit ​​strips 57 are fixedly installed on the outer circular wall of the arc plate 46. Several snap-fit ​​slots 56 are opened on both sides of the inside of the snap-fit ​​seat 47. The snap-fit ​​strips 57 are movably snapped into the snap-fit ​​slots 56.

[0042] In this process, after the two photovoltaic panels are installed inside the mounting frame 24, the angle of the mounting frame 24 is adjusted according to the actual installation angle of the photovoltaic panels. After the electromagnet 58 is de-energized, the iron block 59 and the movable rod 61 move downward under the action of the spring 62. The movable rod 61 drives the extrusion head 52 to move downward and extrude the two arc-shaped plates 46. The arc-shaped plates 46 are extruded and rotate outward, causing the snap-fit ​​strip 57 on it to snap into the snap-fit ​​groove 56 on the snap-fit ​​seat 47. At this time, the snap-fit ​​seat 47 moves and drives the movable block 31 to move. The movement of the movable block 31 changes the angle of the mounting frame 24 and the photovoltaic panels on it through the connecting rod 34, so that the two photovoltaic panels can simulate the actual installation angle during the test. The fireproof and flame-retardant test is more in line with reality and the results are more accurate.

[0043] In addition, by controlling the two electromagnets 58 individually, one of the two mounting brackets 24 can be connected to the snap-fit ​​base 47, thereby keeping the two mounting brackets 24 at different angles, which can meet various installation situations in practice.

[0044] A PLC controller is fixedly installed on one side of the support compartment 1. The eddy current fan 6, drive motor 39, ignition electrode 12 and electromagnet 58 are all electrically connected to the PLC controller.

[0045] The inner bottom surface of the card holder 47 is provided with a sliding groove 55, and a slider 54 is fixedly installed on the bottom surface of the base plate 53. The slider 54 is slidably connected to the sliding groove 55. Both the sliding groove 55 and the slider 54 are T-shaped structures with strong stability. The sliding groove 55 and the slider 54 can restrict the movement of the base plate 53 by cooperating.

[0046] Using the above-mentioned technical features, through the set mounting frame 24, the staff installed two photovoltaic panels inside the two mounting frames 24 respectively, which are marked from left to right as the first photovoltaic panel and the second photovoltaic panel;

[0047] Before conducting fire-retardant tests on photovoltaic panels, staff first determine the actual installation angle of the photovoltaic panels and the spacing between photovoltaic panels in the same row, and then adjust the position of the photovoltaic panels according to the actual installation angle and the spacing between photovoltaic panels in the same row.

[0048] The PLC controller starts DC motor 43, and the drive shaft of DC motor 43 rotates, which drives synchronous pulley 44 to rotate. The rotation of synchronous pulley 44 drives another synchronous pulley 44 to rotate through synchronous belt 45. The rotation of the two synchronous pulleys 44 drives the bidirectional lead screw 41 to rotate. The rotation of the bidirectional lead screw 41 causes the two movable seats 28 to move the mounting frame 24. The bidirectional lead screw 41 can move the two sets of movable seats 28 and mounting frame 24 inward by rotating clockwise, and can move the two sets of movable seats 28 and mounting frame 24 outward by rotating counterclockwise. This allows the spacing between the two photovoltaic panels to be adjusted according to the actual installation situation, and then the photovoltaic panels can be tested for fire resistance and flame retardancy under the actual installation spacing conditions.

[0049] On the one hand, when the installation angles of the two rows of photovoltaic panels are the same, the staff cuts off the power to the electromagnets 58 corresponding to the two mounting brackets 24 through the PLC controller. After losing the magnetic attraction of the electromagnets 58, the force of the spring 62 causes the movable rod 61 to drive the iron block 59 to move downward. The downward movement of the movable rod 61 drives the extrusion head 52 to move downward. The downward movement of the extrusion head 52 will extrude the two arc plates 46. The arc plates 46 are squeezed and rotate outward. The outward rotation of the arc plates 46 drives the support roller 14 to rotate inside the mounting box 10 and at the same time causes the spring 13 to wind up. The outward rotation of the arc plates 46 drives the snap-fit ​​strip 57 to rotate outward. The outward rotation of the snap-fit ​​strip 57 will engage with the snap-fit ​​groove 56 on the inner side of the snap-fit ​​seat 47. At this time, the movable block 31 will be connected with the snap-fit ​​seat 47.

[0050] The PLC controller starts the drive motor 39. The drive shaft of the drive motor 39 rotates, which drives the synchronous pulley 38 to rotate. The rotation of the two synchronous pulleys 38 causes the synchronous belt 40 to move. The movement of the synchronous belt 40 drives the two locking seats 47 to move. The movement of the locking seats 47 causes the movable block 31 to move along the support rod 32 inside the movable hole 30 on the base plate 3. The movement direction of the locking seat 47 is changed by changing the rotation direction of the drive motor 39.

[0051] When the synchronous belt 40 drives the two card holders 47 to move to the right, the movable block 31 moves to the right and drives the mounting frame 24 to rotate downward through the connecting rod 34, causing the mounting frame 24 to rotate around the positioning block 26. The movable block 31 moves to the left and drives the mounting frame 24 to rotate upward along the positioning block 26 through the connecting rod 34, thereby adjusting the tilt angle of the two photovoltaic panels to match the actual installation angle.

[0052] On the other hand, when the installation angles of the two rows of photovoltaic panels are different, when the staff cuts off the power to the electromagnet 58 corresponding to the first photovoltaic panel, the force of the movable rod 61 causes the movable rod 61 and the pressing head 52 to move downward. The pressing head 52 moves downward and presses the arc plate 46. The arc plate 46 is pressed and rotates outward to engage with the locking seat 47. At this time, the mounting bracket 24 corresponding to the second photovoltaic panel is connected to the locking seat 47. When the synchronous belt 40 moves and drives the two locking seats 47 to move, only the connecting rod 34 corresponding to the second photovoltaic panel rotates. This causes the slider 54 to slide inside the groove 55 on the locking seat 47. When the angle of the second photovoltaic panel is adjusted to the appropriate position, the locking seat 47 stops moving. At this time, the electromagnet 58 corresponding to the first photovoltaic panel is de-energized. This causes the arc plate 46 corresponding to the first photovoltaic panel to engage with the locking seat 47, thereby determining the angle of the two photovoltaic panels. Through the above process, the angle of the second photovoltaic panel can be adjusted while the angle of the first photovoltaic panel remains unchanged.

[0053] Conversely, the angle of the first photovoltaic panel can be adjusted in the same way while keeping the angle of the second photovoltaic panel unchanged. By adjusting the angles of the two mounting brackets 24 and the photovoltaic panels respectively, the tilt angles of the two photovoltaic panels in the same row can be made to match the actual situation, allowing for more detectable situations and greater flexibility.

[0054] Then, the staff connected the PMC fuel combustible gas into the air inlet of the annular pipe 5. The PMC fuel combustible gas entering the annular pipe 5 will be rectified by the rectifier 22. The rectified PMC fuel combustible gas is sprayed out through the nozzle 11. When the sprayed PMC fuel combustible gas passes through the ignition electrode 12, it is ignited to produce a flame. At this time, the PLC controller starts the vortex fan 6. The vortex fan 6 rotates to generate airflow. The airflow can simulate the airflow encountered by the photovoltaic panel in actual use. The airflow will also cause the flame to flicker, making the fireproof and flame-retardant test of the photovoltaic panel more realistic.

[0055] Meanwhile, during the fire-retardant testing of the photovoltaic panel, the PLC controller activates the heater 25 on the mounting bracket 24 to heat both sides of the photovoltaic panel, simulating the heating of the photovoltaic panel by the bracket during an actual fire.

[0056] In this process, the spacing between the two mounting brackets 24 in the same row is adjusted to ensure that the installation spacing of the two photovoltaic panels in the fire resistance and flame retardancy test is consistent with reality. The test is conducted based on the actual installation spacing, resulting in high authenticity. By simultaneously adjusting the tilt angles of the two sets of mounting brackets 24 and the photovoltaic panels, or by adjusting the tilt angles of the two sets of mounting brackets 24 and the photovoltaic panels individually, the tilt angle of the two photovoltaic panels in the same row during the test is the same as the tilt angle after subsequent installation. This takes into account the influence of the photovoltaic panel installation angle on the fire resistance and flame retardancy test, making the test more realistic and improving the test results. By using two heaters 25 to heat both sides of the photovoltaic panels, the heating of the photovoltaic panels by the brackets during actual combustion is simulated, further simulating reality and achieving the desired fire resistance and flame retardancy test effect for the photovoltaic panels. This is helpful for testing the photovoltaic panels before installation and use.

[0057] As a preferred embodiment of this example, please refer to [link / reference]. Figures 1 to 11 Several base blocks 48 are fixedly installed on the bottom surface of the substrate 3. A limit rod 50 is fixedly installed between every two base blocks 48. The two base blocks 48 can support the limit rod 50. Two limit blocks 49 are fixedly installed on the top surface of the snap-fit ​​seat 47. The limit blocks 49 are slidably connected to the limit rod 50. The limit rod 50 can restrict the movement of the limit blocks 49.

[0058] Specifically, the movement of the locking seat 47 will cause the limiting block 49 to move along the limiting rod 50 between the two base blocks 48. The limiting block 49 and the limiting rod 50 can restrict the movement of the locking seat 47 and improve the stability of the movement of the locking seat 47.

[0059] Inside the support chamber 1, several spoilers 21 are rotatably connected via a rotating shaft. A gear 16 is coaxially connected to one side of the spoiler 21 via the rotating shaft. A toothed plate 15 is slidably connected to one side of the support chamber 1. The toothed plate 15 is meshed with the gear 16. A moving part for driving the toothed plate 15 to move is provided on one side of the support chamber 1.

[0060] During the testing process, the moving component drives the toothed plate 15 to move. The movement of the toothed plate 15, in conjunction with the gear 16, drives the spoiler 21 to rotate, changing the angle of the spoiler 21. The change in the angle of the spoiler 21 causes the airflow direction generated by the vortex fan 6 to change, conforming to the actual wind direction.

[0061] Specifically, the vortex fan 6 generates airflow by rotating. To simulate the actual wind direction, the staff drives the toothed plate 15 to move via a moving component. The movement of the toothed plate 15 drives the gear 16 to rotate, and the rotation of the gear 16 drives the spoiler 21 to rotate. The direction of movement of the toothed plate 15 determines the rotation angle of the spoiler 21. After the spoiler 21 rotates, it can guide the airflow generated by the vortex fan 6, thereby changing the airflow angle and making the airflow direction conform to the actual wind direction, thus further improving the accuracy of the fireproof and flame-retardant testing of photovoltaic panels.

[0062] The moving component includes two fixed blocks 17, both of which are fixedly installed on one side of the support chamber 1. A lead screw 65 is rotatably connected between the two fixed blocks 17. A connecting block 18 is fixedly installed on one side of the toothed plate 15. The lead screw 65 is threadedly connected to the connecting block 18. A positioning rod 19 is fixedly installed between the two fixed blocks 17. The connecting block 18 is slidably connected to the positioning rod 19. A DC motor 20 is fixedly installed on the bottom surface of the lower fixed block 17. One end of the drive shaft of the DC motor 20 passes through the fixed block 17 and is fixedly connected to the bottom surface of the lead screw 65. The DC motor 20 drives the lead screw 65 to rotate. The rotation of the lead screw 65 causes the connecting block 18 to move the toothed plate 15. The DC motor 20 is electrically connected to the PLC controller.

[0063] Specifically, the DC motor 20 is set up, and the drive shaft of the DC motor 20 rotates to drive the lead screw 65 to rotate. The rotation of the lead screw 65 drives the connecting block 18 to move along the positioning rod 19. The positioning rod 19 can restrict the movement of the connecting block 18. The movement of the connecting block 18 will also drive the toothed plate 15 to move, thus achieving the effect of moving the toothed plate 15.

[0064] Support blocks 60 are fixedly installed on both sides of the iron block 59 to restrict its movement. Support holes 8 are opened on both sides of the fixing tube 51. The support blocks 60 are slidably connected to the support holes 8. The support blocks 60 and the support holes 8 can cooperate to restrict the movement of the iron block 59.

[0065] Specifically, by setting the iron block 59, the downward movement of the iron block 59 will drive the support block 60 to move inside the support hole 8 on the side of the fixed tube 51. The cooperation between the support block 60 and the support hole 8 can restrict the movement of the iron block 59, thereby achieving the effect of restricting the iron block 59.

[0066] Several air inlets 9 are provided on one side of the support chamber 1 for air intake. A dust filter 7 is installed on one side of the support chamber 1 by bolts. The filter 7 can filter dust. The filter 7 can be removed from the side of the support chamber 1 by removing the bolts, making it easy to clean the dust on it.

[0067] Specifically, the vortex fan 6 is installed, and the rotation of the vortex fan 6 causes external air to enter the interior of the support chamber 1 through the air inlet 9. During this process, the filter screen 7 can filter the dust in the air and reduce the amount of dust entering the interior of the support chamber 1.

[0068] A guide seat 66 is fixedly installed on the top surface of the substrate 3. The guide seat 66 can guide the selected flame to be detected. A fireproof plate 29 for blocking the flame is fixedly installed on the top surface of the movable seat 28.

[0069] Specifically, the flame generated by the nozzle 11 and the ignition electrode 12 is sprayed onto the photovoltaic panel through the guide seat 66. The guide seat 66 can guide the flame, and the fireproof plate 29 can block the flame on the photovoltaic panel, thereby improving the safety during the test.

[0070] Working principle: The DC motor 43, synchronous pulley 44, and synchronous belt 45 work together to drive the two bidirectional lead screws 41 to rotate synchronously. The rotation of the two bidirectional lead screws 41 causes the movable seat 28 to move on the bidirectional lead screws 41. The movement of the movable seat 28 drives the mounting frame 24 and the photovoltaic panels on it to move, so that the two sets of mounting frames 24 and photovoltaic panels move inward or outward synchronously, adjusting the spacing between two adjacent photovoltaic panels to simulate the spacing of photovoltaic panels after actual installation.

[0071] Secondly, the angle of the mounting frame 24 is adjusted according to the actual installation angle of the photovoltaic panel. After the electromagnet 58 is de-energized, the iron block 59 and the movable rod 61 move downward under the action of the spring 62. The movable rod 61 drives the pressing head 52 to move downward and press the two arc plates 46. The arc plates 46 are pressed and rotate outward, so that the snap-fit ​​strip 57 on it snaps into the snap-fit ​​groove 56 on the snap-fit ​​seat 47. At this time, the snap-fit ​​seat 47 moves and drives the movable block 31 to move. The movement of the movable block 31 changes the angle of the mounting frame 24 and the photovoltaic panel on it through the connecting rod 34, so that the two photovoltaic panels simulate the actual installation angle during the test. The fireproof and flame-retardant test is more in line with reality and the results are more accurate.

[0072] In addition, by controlling the two electromagnets 58 individually, one of the two mounting brackets 24 can be connected to the snap-fit ​​base 47, thereby keeping the two mounting brackets 24 at different angles, which can meet various installation situations in practice.

[0073] Subsequently, by introducing PMC fuel combustible gas into the interior of the annular pipe 5, the PMC fuel combustible gas is rectified by the rectifier 22 and then sprayed out through the nozzle 11. The sprayed PMC fuel combustible gas ignites upon encountering the ignition electrode 12, generating a flame. At this time, the vortex fan 6 generates airflow to simulate the actual wind speed conditions. Under the action of the airflow, the flame is sprayed onto the photovoltaic panels inside the two mounting brackets 24 and burns. During this process, the heater 25 provides heating to the side of the photovoltaic panel to simulate the heating of the side of the photovoltaic panel after the bracket is heated in an actual fire. The test results are consistent with the actual use process.

[0074] Finally, during the testing process, the DC motor 20 drives the lead screw 65 to rotate. The rotation of the lead screw 65 causes the connecting block 18 to move the toothed plate 15. The movement of the toothed plate 15, in conjunction with the gear 16, drives the spoiler 21 to rotate, changing the angle of the spoiler 21. The change in the angle of the spoiler 21 causes the airflow direction generated by the vortex fan 6 to change, conforming to the actual wind direction.

[0075] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fire-retardant performance testing device for distributed photovoltaic modules, characterized in that, include: Support chamber (1), a support frame (2) is fixedly installed on one side of the support chamber (1), a base plate (3) is fixedly installed on one side of the support frame (2), an annular tube (5) is installed obliquely on one side of the support chamber (1), and a vortex fan (6) is rotatably connected to one side inside the support chamber (1). A rectifier (22) is fixedly sleeved on the inner circular wall of the annular tube (5) for rectifying the PMC fuel combustible gas. Nozzle (11), which is fixedly sleeved on the inner circular wall of the annular tube (5) and is used to spray PMC fuel combustible gas; Ignition electrode (12), which is fixedly installed on the inner bottom surface of the support frame (2) and is used to ignite PMC fuel combustible gas; Testing mechanism (4), which is set on the top surface of the substrate (3) for testing the fire resistance and flame retardancy of the photovoltaic panel; The detection mechanism (4) includes: a plurality of mounting holes (27), all of which are opened on the top surface of the substrate (3). A movable seat (28) is provided inside the mounting hole (27). A limiting rod (23) is fixedly installed inside the mounting hole (27). The limiting rod (23) is slidably connected to the movable seat (28). A positioning block (26) is fixedly installed on the top surface of the movable seat (28). A mounting frame (24) is rotatably connected between every two positioning blocks (26). A plurality of round holes are opened on the bottom surface of the mounting frame (24). Heaters (25) for heating are fixedly installed on both sides of the mounting frame (24). The detection mechanism (4) also includes a top plate (42), which is fixedly installed on one side of the base plate (3). A two-way lead screw (41) is screwed onto each pair of movable seats (28). One end of the two-way lead screw (41) passes through the top plate (42) and is fixedly installed with a synchronous pulley (44). The outer circular walls of the two synchronous pulleys (44) are rotatably connected to a synchronous belt (45). A DC motor (43) for driving the synchronous pulleys (44) is installed on one side of the top plate (42). Two snap-fit ​​seats (47) are provided on the bottom surface of the base plate (3). Two support beams (36) are fixedly installed on the bottom surface of the base plate (3). A limiting frame is fixedly installed on the bottom surface of the support beams (36). (37) A synchronous wheel (38) is rotatably connected inside the limiting frame (37). A synchronous belt (40) is rotatably connected to the outer circular wall of the two synchronous wheels (38). The synchronous belt (40) is fixedly connected to the snap-fit ​​seat (47). A drive motor (39) for driving the synchronous wheel (38) to rotate is installed on one side of the limiting frame (37) on the right side. Two movable holes (30) are opened on the top surface of the base plate (3). A movable block (31) is provided inside the movable hole (30). A support rod (32) is fixedly installed inside the movable hole (30). The support rod (32) is slidably connected to the movable block (31). Two rotating blocks are fixedly installed on the top surface of the movable block (31). Second (35), two rotating blocks (33) are fixedly installed on the bottom surface of the mounting bracket (24), and a connecting rod (34) is rotatably connected between the two rotating blocks (33). The lower end of the connecting rod (34) is rotatably connected to the two rotating blocks (35). A fixed tube (51) is fixedly installed on the bottom surface of the movable block (31). An electromagnet (58) is fixedly installed on the bottom surface of the movable block (31). An iron block (59) is slidably connected inside the fixed tube (51). A movable rod (61) is fixedly installed on the bottom surface of the iron block (59). A partition (63) is fixedly installed inside the fixed tube (51). The lower end of the movable rod (61) passes through the partition (63) and a pressing head (52) is fixedly installed on its bottom surface. A spring (62) is fitted on the outer circular wall of the movable rod (61). A connecting frame (64) is fixedly installed on both sides of the fixed tube (51). A base plate (53) is fixedly installed between the two connecting frames (64). Several mounting boxes (10) are fixedly installed on the top surface of the base plate (53). A support roller (14) is rotatably connected inside the mounting box (10). One end of the support roller (14) passes through the mounting box (10) and extends to the outside of the mounting box (10). A spring (13) is wound around the outer circular wall of the support roller (14). An arc plate (46) is fixedly installed between every two support rollers (14). Several snap-fit ​​strips (57) are fixedly installed on the outer circular wall of the arc plate (46).The snap-fit ​​base (47) has several snap-fit ​​slots (56) on both sides inside. The snap-fit ​​strip (57) is movably snapped into the snap-fit ​​slots (56). The bottom surface of the snap-fit ​​base (47) has a sliding groove (55). A slider (54) is fixedly installed on the bottom surface of the base plate (53). The slider (54) is slidably connected to the sliding groove (55).

2. The fire-retardant performance testing equipment for distributed photovoltaic modules according to claim 1, characterized in that: The bottom surface of the substrate (3) is fixedly mounted with a plurality of base blocks (48), and a limit rod (50) is fixedly mounted between every two base blocks (48). The top surface of the snap-fit ​​seat (47) is fixedly mounted with two limit blocks (49), and the limit blocks (49) are slidably connected to the limit rods (50).

3. The fire-retardant performance testing equipment for distributed photovoltaic modules according to claim 1, characterized in that: The support chamber (1) is rotatably connected to several baffles (21). A gear (16) is coaxially connected to one side of the baffle (21). A toothed plate (15) is slidably connected to one side of the support chamber (1). The toothed plate (15) meshes with the gear (16). A moving part for driving the toothed plate (15) to move is provided on one side of the support chamber (1).

4. The fire-retardant performance testing equipment for distributed photovoltaic modules according to claim 3, characterized in that: The moving part includes two fixed blocks (17), both of which are fixedly installed on one side of the support chamber (1). A lead screw (65) is rotatably connected between the two fixed blocks (17). A connecting block (18) is fixedly installed on one side of the toothed plate (15). The lead screw (65) is threadedly connected to the connecting block (18). A positioning rod (19) is fixedly installed between the two fixed blocks (17). The connecting block (18) is slidably connected to the positioning rod (19). A DC motor (20) for driving the lead screw (65) to rotate is fixedly installed on the bottom surface of the lower fixed block (17).

5. The fire-retardant performance testing equipment for distributed photovoltaic modules according to claim 1, characterized in that: Both sides of the iron block (59) are fixedly installed with support blocks (60) for restricting the movement of the iron block (59), and both sides of the fixed tube (51) are provided with support holes (8), and the support blocks (60) are slidably connected to the support holes (8).

6. The fire-retardant performance testing equipment for distributed photovoltaic modules according to claim 2, characterized in that: The support chamber (1) has several air inlets (9) on one side for air intake, and a filter screen (7) for dust prevention is installed on one side of the support chamber (1).

7. The fire-retardant performance testing equipment for distributed photovoltaic modules according to claim 1, characterized in that: A guide seat (66) is fixedly installed on the top surface of the substrate (3), and a fireproof plate (29) for blocking flames is fixedly installed on the top surface of the movable seat (28).

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