A photovoltaic array resistance distribution precision measuring device

Abstract

The utility model discloses a photovoltaic array resistance distribution precision measuring device relates to measuring device technical field, including shielding shell, the cavity inside bottom fixedly connected with U type buffer seat of shielding shell, the top slidingly connected with support plate of U type buffer seat, the top fixedly connected with system assembly of support plate, the bottom fixedly connected with the positioning plate of support plate, the top of U type buffer seat is equipped with the positioning mouth, and the positioning plate is inserted with the positioning mouth. The shielding shell provided by the utility model is convenient for the quick disassembly separation of internal measurement system assembly, is convenient for maintenance or detection, and enhances the anti - electromagnetic interference and promotes the detection accuracy simultaneously, thereby solve the inconvenient quick disassembly separation of the photovoltaic array resistance distribution precision measuring device of existing when maintaining the internal system assembly, and the use is easy to suffer from electrical equipment electromagnetic radiation and transmission line electromagnetic field interference and lead to the problem of inaccurate measurement signal.

Description

Technical Field

[0001] This utility model relates to the field of measurement device technology, specifically to a precise measurement device for the resistance distribution of a photovoltaic array. Background Technology

[0002] The photovoltaic array resistance distribution measurement device is a specialized application equipment of resistance tester in the photovoltaic field to meet the resistance distribution measurement needs of photovoltaic arrays. It is based on the basic measurement principle of resistance tester, and at the same time, it has been optimized and customized in combination with the characteristics of photovoltaic array.

[0003] A search revealed that the publication (announcement) number is CN220367349U, and the title is: "A resistance tester, including a tester body. The front of the tester body is fixed with an operation panel, and the top of the tester body is fixed with a mounting frame, etc. The mounting frame, together with a cover plate, can store and protect the handle for lifting, improve the insulation performance of the instrument, and solve the problem that the handle and bottom of the existing resistance tester are easily soiled by dust and sewage on the construction site, making it inconvenient to use in relatively dirty and messy environments."

[0004] The above technical solution has the following shortcomings;

[0005] The above-mentioned solution requires the removal of multiple complex and tightly connected components to access the system components that need to be repaired or replaced during maintenance and repair. This not only consumes a lot of time, but may also require the removal of part of the equipment's outer frame, making it difficult to quickly disassemble and separate the internal system components for repair or testing. The whole process is cumbersome and time-consuming, which seriously affects the equipment's maintenance efficiency and uptime. Moreover, since it is usually used in photovoltaic stations, the inverters, transformers and other electrical equipment generate broadband electromagnetic radiation during operation. The electromagnetic field formed by the transmission lines can interfere with the measuring device through direct radiation or electromagnetic induction, affecting the accuracy of the measurement signal and causing deviations in the measurement results, thus failing to meet the requirements for high-precision measurement. Utility Model Content

[0006] In view of the problems existing in the current photovoltaic array resistance distribution accurate measurement device, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a precise measurement device for the resistance distribution of photovoltaic arrays, which solves the problems of existing precise measurement devices for the resistance distribution of photovoltaic arrays being inconvenient to quickly disassemble and separate internal system components during maintenance and repair, and being easily affected by electromagnetic radiation from electrical equipment and electromagnetic field interference from power transmission lines, resulting in inaccurate measurement signals.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A photovoltaic array resistance distribution precision measurement device includes a shielding shell, a U-shaped buffer seat fixedly connected to the bottom of the cavity of the shielding shell, a support plate slidably connected to the top of the U-shaped buffer seat, a measurement system component fixedly connected to the top of the support plate, a positioning plate fixedly connected to the bottom of the support plate, a positioning port opened on the top of the U-shaped buffer seat, the positioning plate being inserted into the positioning port, and a snap-fit ​​mechanism being provided between the positioning plate and the U-shaped buffer seat.

[0010] The top of the shielding shell is fixedly connected to a connecting compartment, and multiple protective bracket assemblies are fixedly connected inside the cavity of the connecting compartment. A test probe assembly is inserted into each of the protective bracket assemblies. The shielding shell includes a high-shield outer shell, an inner wall of which is fixedly connected to a conductive adhesive filling layer, and an inner wall of which is fixedly connected to a low-shield inner shell. A grounding support foot is fixedly connected to the bottom of the high-shield outer shell. A shielding cover is rotatably connected to the outer wall of the shielding shell via a hinge. A display controller is fixedly connected to the inner wall of the shielding cover through an opening. A limiting mechanism is provided between the shielding cover and the shielding shell.

[0011] Preferably, the locking mechanism includes a limiting slot, a limiting rod, a spring, an adjusting groove, and a paddle. The positioning plate has a limiting slot on its side wall. The limiting rod is slidably connected inside the cavity of the U-shaped buffer seat. A spring is sleeved on the rod wall of the limiting rod. The limiting rod is inserted into the limiting slot. The U-shaped buffer seat has an adjusting groove on its side wall and is slidably connected to a paddle. The side wall of the paddle is fixedly connected to the rod wall of the limiting rod.

[0012] Preferably, the limiting mechanism includes a limiting plate, a U-shaped limiting seat, a threaded limiting port, and a limiting bolt. The limiting plate is fixedly connected to the side wall of the shielding cover, and the U-shaped limiting seat is fixedly connected to the side wall of the shielding shell. The limiting plate and the U-shaped limiting seat are inserted into each other. The limiting plate and the U-shaped limiting seat have corresponding threaded limiting ports, and the limiting bolts are threadedly connected to them.

[0013] Preferably, the protective bracket assembly includes a sealing threaded sleeve, and a protective rubber gasket is fixedly connected to the inner side wall of the sealing threaded sleeve.

[0014] Preferably, the test probe assembly includes a probe, and a threaded connecting ring is fixedly connected to the outer wall of the probe, the threaded connecting ring being threadedly connected to a sealing threaded sleeve.

[0015] Furthermore, a cushioning foam filling layer is fixedly connected inside the cavity of the connecting compartment, and a carrying handle is rotatably connected to the top of the connecting compartment.

[0016] Preferably, the probe surface is provided with a rust-proof tin-plated coating.

[0017] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0018] 1. This utility model utilizes the sliding connection between the U-shaped buffer seat and the support plate, and the plug-in and snap-fit ​​mechanism between the positioning plate and the positioning port to achieve rapid positioning and disassembly of the measurement system components. The setting of the limiting mechanism ensures a stable connection between the shielding cover and the shielding shell and facilitates separation. At the same time, the threaded connection design of the protective bracket assembly and the test probe assembly facilitates the installation and replacement of the probe, significantly improving the overall maintenance and repair efficiency of the device.

[0019] 2. This utility model utilizes a multi-layer shielding structure consisting of a high-shielding outer shell, a conductive adhesive filling layer, and a low-shielding inner shell, combined with grounding support feet, to effectively shield external electromagnetic interference. The anti-rust tin-plated coating on the probe surface ensures good electrical contact, reduces measurement errors, and guarantees the accuracy and reliability of photovoltaic array resistance distribution measurement results.

[0020] 3. This utility model utilizes protective rubber pads and buffer foam filling layers to provide buffer protection for the test probe assembly and internal components of the device, reducing vibration damage. The anti-rust tin-plated coating prevents probe corrosion and extends service life. At the same time, the robust connection design between the components ensures long-term stable operation of the device in complex environments. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a front sectional view of the present invention;

[0024] Figure 3 This is a partial cross-sectional view of the present invention;

[0025] Figure 4 This is a top sectional view of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Shielding shell; 2. U-shaped buffer seat; 3. Support plate; 4. Measurement system components; 5. Positioning plate; 6. Positioning port; 7. Connecting compartment; 8. Protective bracket assembly; 9. Test probe assembly; 10. High-shielding outer shell; 11. Conductive adhesive filling layer; 12. Low-shielding inner shell; 13. Grounding support foot; 14. Shielding cover plate; 15. Display controller; 16. Limiting bayonet; 17. Limiting lever; 18. Spring; 19. Adjusting slide; 20. Paddle; 21. Limiting plate; 22. U-shaped limit seat; 23. Threaded limit port; 24. Limiting bolt; 25. Sealing threaded sleeve; 26. Protective rubber pad; 27. Probe; 28. Threaded connecting ring; 29. ​​Buffer foam filling layer; 30. Carrying handle. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] This utility model discloses a device for accurately measuring the resistance distribution of a photovoltaic array.

[0030] This utility model provides, for example Figure 1-4 The photovoltaic array resistance distribution precision measurement device shown includes a shielding shell 1, a U-shaped buffer seat 2 fixedly connected to the bottom of the cavity of the shielding shell 1, a support plate 3 slidably connected to the top of the U-shaped buffer seat 2, a measurement system component 4 fixedly connected to the top of the support plate 3, a positioning plate 5 fixedly connected to the bottom of the support plate 3, a positioning port 6 opened on the top of the U-shaped buffer seat 2, the positioning plate 5 is inserted into the positioning port 6, and a snap-fit ​​mechanism is provided between the positioning plate 5 and the U-shaped buffer seat 2.

[0031] A connection chamber 7 is fixedly connected to the top of the shielding shell 1. Multiple protective support assemblies 8 are fixedly connected inside the cavity of the connection chamber 7. A test probe assembly 9 is inserted into each protective support assembly 8. The shielding shell 1 includes a high-shield outer shell 10. A conductive adhesive filling layer 11 is fixedly connected to the inner wall of the high-shield outer shell 10. A low-shield inner shell 12 is fixedly connected to the inner wall of the conductive adhesive filling layer 11. A grounding support foot 13 is fixedly connected to the bottom of the high-shield outer shell 10. A shielding cover plate 14 is rotatably connected to the outer wall of the shielding shell 1 via a hinge. A display is fixedly connected to the inner wall of the shielding cover plate 14 through an opening. A limiting mechanism is provided between the controller 15, the shielding cover 14, and the shielding shell 1. The sliding connection between the U-shaped buffer seat 2 and the support plate 3, along with the insertion structure of the positioning plate 5 and the positioning port 6, provides support and positioning for the measurement system component 4, ensuring its stability within the device. This also facilitates the sliding adjustment of the support plate 3 on the U-shaped buffer seat 2, providing a basis for quick disassembly and separation of the measurement system component 4 during subsequent maintenance and repair. The snap-fit ​​mechanism further secures the position of the support plate 3, preventing displacement during use. The connection compartment 7 and protective bracket assembly 8 provide an installation and protection structure for the test probe assembly 9, ensuring its stability and safety within the device. The multi-layered shielding structure, consisting of a high-shield outer shell 10, a conductive adhesive filling layer 11, and a low-shield inner shell 12, effectively shields against electromagnetic radiation from electrical equipment and electromagnetic fields from power transmission lines, reducing the impact of external electromagnetic interference on measurement signals and improving the accuracy of measurement results. The grounding support foot 13 grounds the shielding shell 1, further enhancing the shielding effect. A limiting mechanism securely connects the shielding cover 14 and the shielding shell 1, preventing accidental opening of the shielding cover 14 and ensuring its shielding performance. It also facilitates opening the shielding cover 14 during maintenance. The integrated display controller 15, located inside the shielding cover 14, allows for easy operation and viewing of measurement data. Being within the shielding structure, it avoids external interference affecting its normal operation. This solves the problems of existing photovoltaic array resistance distribution precision measurement devices, such as difficulty in quickly disassembling and separating internal system components during maintenance and the susceptibility to electromagnetic interference from electrical equipment and power transmission lines, leading to inaccurate measurement signals.

[0032] To quickly limit and fix the positioning plate 5 and facilitate disassembly and separation, such as Figure 2 and 3The locking mechanism includes a limiting slot 16, a limiting rod 17, a spring 18, an adjusting groove 19, and a lever 20. The positioning plate 5 has a limiting slot 16 on its side wall. The limiting rod 17 is slidably connected inside the cavity of the U-shaped buffer seat 2. A spring 18 is sleeved on the rod wall of the limiting rod 17. The limiting rod 17 is inserted into the limiting slot 16. The U-shaped buffer seat 2 has an adjusting groove 19 on its side wall, and a lever 20 is slidably connected thereto. The side wall of the lever 20 is fixedly connected to the rod wall of the limiting rod 17. The mechanism utilizes the provided spring... Spring 18 provides elastic force to keep the limit lever 17 in the insertion state with the limit slot 16, thereby firmly fixing the positioning plate 5 and the support plate 3 and preventing the measuring system component 4 from shaking during device operation. By moving the lever 20, the limit lever 17 is driven to slide in the adjusting groove 19, overcoming the spring force and causing the limit lever 17 to disengage from the limit slot 16. This allows for quick separation of the positioning plate 5 from the U-shaped buffer seat 2, facilitating the disassembly and maintenance of the measuring system component 4. The operation is simple and convenient, improving maintenance and repair efficiency.

[0033] To facilitate quick disassembly and separation of the shielding cover 14, such as Figure 1 , 2 As shown in Figure 4, the limiting mechanism includes a limiting plate 21, a U-shaped limiting seat 22, a threaded limiting port 23, and a limiting bolt 24. The limiting plate 21 is fixedly connected to the side wall of the shielding cover 14, and the U-shaped limiting seat 22 is fixedly connected to the side wall of the shielding shell 1. The limiting plate 21 and the U-shaped limiting seat 22 are inserted into each other. The limiting plate 21 and the U-shaped limiting seat 22 have corresponding threaded limiting ports 23, and the limiting bolts 24 are threadedly connected. By utilizing the insertion and cooperation of the limiting plate 21 and the U-shaped limiting seat 22, the shielding shell 1 can achieve the desired effect. The connection between the cover plate 14 and the shielding shell 1 provides initial positioning, enabling them to accurately align. By using the threaded connection between the limit bolt 24 and the threaded limit port 23, the limit plate 21 and the U-shaped limit seat 22 can be firmly locked, thereby securely connecting the shielding cover plate 14 and the shielding shell 1, ensuring the integrity of the shielding structure, and effectively preventing external electromagnetic interference from entering the device. At the same time, unscrewing the limit bolt 24 can separate the shielding cover plate 14 and the shielding shell 1, facilitating maintenance and repair of the device's interior.

[0034] To facilitate the protection of the test probe assembly 9, such as Figure 4 As shown, the protective bracket assembly 8 includes a sealing threaded sleeve 25, and a protective rubber gasket 26 is fixedly connected to the inner side wall of the sealing threaded sleeve 25. The sealing threaded sleeve 25 provides a threaded connection installation structure for the test probe assembly 9, which facilitates the installation and disassembly of the test probe assembly 9. The protective rubber gasket 26 can buffer and protect the inserted test probe assembly 9, reducing damage to the test probe assembly 9 from external collisions and vibrations. At the same time, the protective rubber gasket 26 can enhance the sealing performance and prevent external dust, moisture and other substances from entering the device and affecting the normal operation of the test probe assembly 9 and other components.

[0035] To facilitate connection and disassembly of the protective bracket assembly 8, such as Figure 4 As shown, the test probe assembly 9 includes a probe 27, and a threaded connecting ring 28 is fixedly connected to the outer wall of the probe 27. The threaded connecting ring 28 and the sealing threaded sleeve 25 are threadedly connected. By using the threaded connection between the threaded connecting ring 28 and the sealing threaded sleeve 25, the test probe assembly 9 can be firmly installed on the protective bracket assembly 8, ensuring the stability of the probe 27 during storage, avoiding shaking and impact that may affect the performance, and allowing for disassembly and replacement. When the probe 27 is worn or damaged, it can be quickly replaced, improving the maintainability of the device.

[0036] To provide cushioning and shock absorption, such as Figure 1 and 3 As shown, a cushioning foam filling layer 29 is fixedly connected inside the cavity of the connecting compartment 7, and a carrying handle 30 is rotatably connected to the top of the connecting compartment 7. The cushioning foam filling layer 29 can buffer and dampen the test probe assembly 9 and other components inside the connecting compartment 7, reducing the damage to the internal components caused by vibration during the handling and use of the device, and protecting the performance and service life of the internal components. The carrying handle 30 makes it convenient for users to handle and carry the measuring device, and the rotatable connection means that the carrying handle 30 can be folded up when not in use, saving space and facilitating the storage and transportation of the device.

[0037] In order to extend the service life of probe 27, such as Figure 4 As shown, the surface of probe 27 is coated with an anti-rust tin-plated coating. The anti-rust tin-plated coating can effectively prevent the probe 27 from oxidizing and corroding in complex outdoor environments such as humidity, acid and alkali. It avoids the formation of an oxide layer on the surface of probe 27 due to corrosion, which would increase the contact resistance. This ensures good electrical contact between probe 27 and the photovoltaic array under test, thereby improving the accuracy of the measurement results. The anti-rust tin-plated coating can also extend the service life of probe 27 and reduce the cost and maintenance workload of frequent replacement due to probe damage.

[0038] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for accurately measuring the resistance distribution of a photovoltaic array, comprising a shielding shell (1), characterized in that, The bottom of the cavity of the shielding shell (1) is fixedly connected to a U-shaped buffer seat (2), the top of the U-shaped buffer seat (2) is slidably connected to a support plate (3), the top of the support plate (3) is fixedly connected to a measurement system component (4), the bottom of the support plate (3) is fixedly connected to a positioning plate (5), the top of the U-shaped buffer seat (2) is provided with a positioning port (6), the positioning plate (5) is inserted into the positioning port (6), and a snap-fit ​​mechanism is provided between the positioning plate (5) and the U-shaped buffer seat (2). The top of the shielding shell (1) is fixedly connected to a connecting compartment (7), and multiple protective bracket assemblies (8) are fixedly connected inside the cavity of the connecting compartment (7). Each protective bracket assembly (8) is inserted with a test probe assembly (9). The shielding shell (1) includes a high shielding shell (10). The inner wall of the high shielding shell (10) is fixedly connected to a conductive adhesive filling layer (11). The inner wall of the conductive adhesive filling layer (11) is fixedly connected to a low shielding inner shell (12). The bottom of the high shielding shell (10) is fixedly connected to a grounding support foot (13). The outer wall of the shielding shell (1) is rotatably connected to a shielding cover plate (14) via a hinge. The inner wall of the shielding cover plate (14) is fixedly connected to a display controller (15) via an opening. A limiting mechanism is provided between the shielding cover plate (14) and the shielding shell (1).

2. The photovoltaic array resistance distribution precision measurement device according to claim 1, characterized in that, The locking mechanism includes a limiting slot (16), a limiting rod (17), a spring (18), an adjusting groove (19), and a lever (20). The positioning plate (5) has a limiting slot (16) on its side wall. The U-shaped buffer seat (2) is slidably connected to the limiting rod (17). The limiting rod (17) is sleeved with a spring (18) on its rod wall. The limiting rod (17) is inserted into the limiting slot (16). The U-shaped buffer seat (2) has an adjusting groove (19) on its side wall and is slidably connected to a lever (20). The side wall of the lever (20) is fixedly connected to the rod wall of the limiting rod (17).

3. The photovoltaic array resistance distribution precision measurement device according to claim 1, characterized in that, The limiting mechanism includes a limiting plate (21), a U-shaped limiting seat (22), a threaded limiting port (23), and a limiting bolt (24). The side wall of the shielding cover (14) is fixedly connected to the limiting plate (21), and the side wall of the shielding shell (1) is fixedly connected to the U-shaped limiting seat (22). The limiting plate (21) and the U-shaped limiting seat (22) are inserted into each other. The limiting plate (21) and the U-shaped limiting seat (22) have corresponding threaded limiting ports (23), and the threaded bolts (24) are connected to them.

4. The photovoltaic array resistance distribution precision measurement device according to claim 1, characterized in that, The protective bracket assembly (8) includes a sealing threaded sleeve (25), and a protective rubber pad (26) is fixedly connected to the inner side wall of the sealing threaded sleeve (25).

5. The photovoltaic array resistance distribution precision measurement device according to claim 1, characterized in that, The test probe assembly (9) includes a probe (27), and a threaded connecting ring (28) is fixedly connected to the outer side wall of the probe (27). The threaded connecting ring (28) and the sealing threaded sleeve (25) are threadedly connected.

6. The photovoltaic array resistance distribution precision measurement device according to claim 1, characterized in that, The cavity of the connecting chamber (7) is fixedly connected with a cushioning foam filling layer (29), and the top of the connecting chamber (7) is rotatably connected with a carrying handle (30).

7. The photovoltaic array resistance distribution precision measurement device according to claim 5, characterized in that, The probes (27) are all coated with a rust-proof tin-plated coating.

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