Back mechanical load test tool for flat-plate solar collector

Abstract

The utility model belongs to the technical field of heat collector performance test equipment, and provides a flat plate type solar heat collector back mechanical load test tool which comprises an outer frame, an adsorption table and a load table, the adsorption table and the load table are movably hung on the outer frame through a cable, and the adsorption table and the load table are fixedly arranged at the two ends of the cable respectively. A plurality of suction cups distributed at intervals are arranged at the bottom of the adsorption table, and the load table is provided with a containing cavity used for containing loads. The back mechanical load test tool for the flat-plate solar thermal collector is simple in structure, convenient and fast to use, capable of being used for back mechanical load test of the flat-plate solar thermal collector, capable of improving test efficiency and reducing test cost, suitable for flat-plate solar thermal collectors of different models and specifications, high in practicability and wide in application range.

Description

Technical Field

[0001] This utility model belongs to the technical field of solar collector performance testing equipment, and specifically relates to a mechanical load testing fixture for the back of a flat-plate solar collector. Background Technology

[0002] Before leaving the factory, flat-plate solar collectors need to undergo tests on their pressure resistance, stiffness, mechanical load, stagnation under direct sunlight, no-load exposure, standard stagnation temperature, external thermal shock, internal thermal shock, rain resistance, freeze resistance, maximum operating temperature, thermal performance, pressure drop, and impact resistance to ensure that the collectors meet the standard requirements. Specific details can be found in the relevant sections of the national standards GB / T 6424-2021 "Flat-plate Solar Collectors" and GB / T 4271-2021 "Performance Test Methods for Solar Collectors". Currently, static mechanical load testing machines are commonly used for back-side mechanical load testing of flat-plate solar collectors. These machines simulate back-side (reverse) load tests by applying force through cylinders. However, load testing machines are complex to install and debug, difficult to operate, and often require extensive training for operators. Furthermore, the equipment is expensive and requires regular maintenance by professional personnel, significantly increasing the corresponding testing costs.

[0003] Therefore, it is necessary to design a mechanical load test fixture for the back of a flat-plate solar collector that can at least solve some of the above problems and defects. Summary of the Invention

[0004] To address the above-mentioned technical problems, this utility model proposes a mechanical load testing fixture for the back of a flat-plate solar collector. It features a simple structure and convenient use, and can be used for mechanical load testing of the back of flat-plate solar collectors, improving testing efficiency, reducing testing costs, and is applicable to different models and specifications of flat-plate solar collectors. It is highly practical and has a wide range of applications.

[0005] The technical solution of this utility model is:

[0006] This utility model proposes a mechanical load test fixture for the back of a flat-plate solar collector, including an outer frame and an adsorption platform and a load platform that are movably suspended on the outer frame by a cable. The adsorption platform and the load platform are respectively fixed at both ends of the cable.

[0007] The bottom of the adsorption stage is provided with several suction cups spaced apart, and the load stage is provided with a accommodating cavity for placing the load.

[0008] Preferably, the adsorption platform includes a main support and several secondary supports perpendicularly connected thereto, and the several secondary supports are evenly spaced along the length direction of the main support.

[0009] Each of the sub-supports is provided with at least two suction cups at its bottom, and the suction cups are symmetrically arranged on both sides of the main support.

[0010] Preferably, both the main support and the top of the load platform are provided with lifting lugs, and both ends of the cable are fixedly connected to the lifting lugs respectively.

[0011] Preferably, the sub-support is detachably connected to the main support, and the suction cup is detachably connected to the sub-support.

[0012] Preferably, the main support is provided with a plurality of transverse adjustment holes spaced apart along its length, and the secondary support is provided with a plurality of longitudinal adjustment holes spaced apart along its length.

[0013] Preferably, the top of the outer frame is provided with a pulley group fixedly connected thereto, the cable is movably wound around the pulley group, and at least two pulley groups and the cable are arranged in parallel at intervals.

[0014] Preferably, the bottom of the outer frame is provided with a plurality of spaced support columns, and the upper surfaces of the plurality of support columns are all located on the same horizontal plane.

[0015] This utility model has the following advantages and effects compared with the prior art:

[0016] (1) The adsorption platform and load platform are suspended on the outer frame by cables. The load pressure on the back of the flat solar collectors arranged at the bottom of the adsorption platform can be changed by adding a corresponding load on the load platform. The structure is simple and easy to use, and the operation is easy to learn, which effectively improves the test efficiency and reduces the test cost.

[0017] (2) An adsorption platform consisting of a main support and several sub-supports is adopted, and at least two suction cups symmetrically distributed about the main support are provided at the bottom of the sub-supports to ensure that the suction cups are evenly spaced on the back of the collector, thereby ensuring the stability of the test process and the accuracy of the test results.

[0018] (3) A main support with a horizontal adjustment hole and a secondary support with a vertical adjustment hole are adopted. By adjusting the number and position of the secondary support and suction cups, the solar collectors of different lengths and widths can be adapted to the solar collectors of different specifications and models, thereby improving practicality and expanding the scope of application. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the mechanical load test fixture on the back of the flat-plate solar collector in this embodiment of the present invention;

[0020] Figure 2 for Figure 1 A magnified structural diagram of position A in the middle.

[0021] Reference numerals: 1. Outer frame; 11. Support column; 2. Adsorption platform; 21. Main support; 211. Lateral adjustment hole; 22. Secondary support; 221. Longitudinal adjustment hole; 3. Load platform; 31. Accommodation cavity; 4. Cable; 5. Suction cup; 6. Lifting lug; 7. Pulley block. Detailed Implementation

[0022] To enable those skilled in the art to better understand this utility model, it will now be further described in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this utility model.

[0023] Example:

[0024] like Figures 1-2 As shown, this utility model provides a mechanical load test fixture for the back of a flat-plate solar collector, which includes an outer frame 1 and an adsorption platform 2 and a load platform 3 movably suspended on the outer frame 1. The adsorption platform 2 and the load platform 3 are suspended on the outer frame 1 by a cable 4, and the adsorption platform 2 and the load platform 3 are respectively fixed at both ends of the cable 4. The load platform 3 is provided with a receiving cavity 31 for placing the load, so as to change the pressure applied to the back of the collector (negative pressure load) by placing different loads in the receiving cavity 31 of the load platform 3.

[0025] The top of the outer frame 1 is provided with a pulley group 7 fixedly connected to it. The cable 4 is movably wound around the pulley group 7. Specifically, the top of the main support 21 and the load platform 3 are provided with multiple lifting lugs 6. One end of the cable 4 is fixedly connected to the lifting lug 6 of the main support 21, and the other end is fixedly connected to the lifting lug 6 of the load platform 3. The pulley group 7 includes two pulleys located on the same plane. One pulley is located directly above the adsorption platform 2, and the other pulley is located directly above the load platform 3, so that the cable 4 can be smoothly wound around the outer circumference of the pulley and slide freely.

[0026] Furthermore, in this embodiment, two sets of pulley blocks 7 and cables 4 are arranged in parallel at intervals, respectively connected to the left and right sides of the adsorption platform 2 and the load platform 3, to ensure the stability of the adsorption platform 2 and the load platform 3 during the test. It should be noted that the number and position of cables 4 and pulley blocks 7 can be set according to the actual test requirements, which will not be elaborated here.

[0027] Furthermore, the bottom of the outer frame 1 is provided with several spaced support columns 11, and the upper surfaces of the several support columns 11 are all located on the same horizontal plane to ensure that the flat plate solar collector is placed horizontally during the test, thereby ensuring the accuracy of the test results. Specifically, in this embodiment, there are four support columns 11, which are symmetrically distributed on the left and right sides of the outer frame 1.

[0028] The bottom of the adsorption platform 2 is equipped with several suction cups 5 evenly spaced. During the test, the suction cups 5 are evenly arranged on the back of the collector. At the same time, it is necessary to ensure that the suction cups 5 do not obstruct the movement of the collector cover plate caused by mechanical load, so as to avoid affecting the test results. The specific test conditions and methods can be referred to the relevant content of mechanical load in GB / T 4271-2021 "Test Methods for Performance of Solar Collectors", which will not be repeated here.

[0029] Combination Figure 1 and Figure 2 As shown, the adsorption platform 2 includes a main support 21 and several auxiliary supports 22 that are perpendicularly connected to it. The auxiliary supports 22 are evenly spaced along the length of the main support 21. Each auxiliary support 22 has at least two suction cups 5 at its bottom, and the suction cups 5 are symmetrically distributed on both sides of the main support 21.

[0030] Further reference Figure 2 As shown, the auxiliary support 22 is detachably connected to the main support 21 via bolts, and the suction cup 5 is detachably connected to the auxiliary support 22 via bolts. The main support 21 is provided with several transverse adjustment holes 211 spaced along its length, and the auxiliary support 22 is provided with several longitudinal adjustment holes 221 spaced along its length. By changing the number and position of the auxiliary support 22, it can adapt to flat-plate solar collectors of different lengths, and by changing the number and position of the suction cup 5, it can adapt to flat-plate solar collectors of different widths. This allows for the adaptation to different types and specifications of flat-plate solar collectors, enabling back-side mechanical load tests on various types and models of flat-plate solar collectors. This greatly reduces testing costs and improves testing efficiency.

[0031] Optionally, in some embodiments, the vertical forces exerted by the adsorption platform 2 and the load platform 3 on both ends of the cable 4 are the same. That is, when the suction cup 5 of the adsorption platform 2 is not arranged to adsorb onto the surface of the collector and no load is placed in the accommodating cavity 31 of the load platform 3, the adsorption platform 2 and the load platform 3 are in a balanced state. At the same time, when the suction cup 5 is arranged to adsorb onto the surface of the collector during the test, the length of the cable 4 must ensure that the load platform 3 is in a suspended state to ensure that the pressure applied to the back of the collector can be provided normally during the test.

[0032] In summary, the mechanical load testing fixture for the back of a flat-plate solar collector provided by this utility model has a simple structure and is easy to use. It can be used for mechanical load testing on the back of flat-plate solar collectors, improving testing efficiency and reducing testing costs. It is also suitable for flat-plate solar collectors of different models and specifications, and has strong practicality and wide applicability.

[0033] The above are merely preferred embodiments of the present utility model and do not limit the patent scope of the present utility model. All equivalent changes and modifications made within the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A mechanical load testing fixture for the back of a flat-plate solar collector, characterized in that: It includes an outer frame (1) and an adsorption platform (2) and a load platform (3) that are movably suspended on the outer frame (1) via a cable (4). The adsorption platform (2) and the load platform (3) are respectively fixed at both ends of the cable (4). The bottom of the adsorption stage (2) is provided with several suction cups (5) spaced apart, and the load stage (3) is provided with a accommodating cavity (31) for placing the load.

2. The mechanical load test fixture for the back of a flat-plate solar collector according to claim 1, characterized in that: The adsorption platform (2) includes a main support (21) and several auxiliary supports (22) perpendicularly connected to it. The several auxiliary supports (22) are evenly spaced along the length of the main support (21). Each of the sub-supports (22) has at least two suction cups (5) at its bottom, and the suction cups (5) are symmetrically arranged on both sides of the main support (21).

3. The mechanical load test fixture for the back of a flat-plate solar collector according to claim 2, characterized in that: The main support (21) and the load platform (3) are both equipped with lifting lugs (6), and the two ends of the cable (4) are fixedly connected to the lifting lugs (6).

4. The mechanical load test fixture for the back of a flat-plate solar collector according to claim 2, characterized in that: The sub-support (22) is detachably connected to the main support (21), and the suction cup (5) is detachably connected to the sub-support (22).

5. The mechanical load test fixture for the back of a flat-plate solar collector according to claim 4, characterized in that: The main support (21) is provided with a number of transverse adjustment holes (211) spaced apart along its length, and the secondary support (22) is provided with a number of longitudinal adjustment holes (221) spaced apart along its length.

6. The mechanical load test fixture for the back of a flat-plate solar collector according to claim 1, characterized in that: The top of the outer frame (1) is provided with a pulley group (7) fixedly connected thereto, and the cable (4) is movably wound around the pulley group (7). The pulley group (7) and the cable (4) are provided with at least two sets of pulleys at parallel intervals.

7. The mechanical load test fixture for the back of a flat-plate solar collector according to claim 1, characterized in that: The bottom of the outer frame (1) is provided with several spaced support columns (11), and the upper surfaces of the several support columns (11) are all located on the same horizontal plane.

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