Device for testing performance of building membrane structure in simulated corrosion environment

Abstract

The utility model provides an architectural membrane structure performance testing device for simulating a corrosion environment. The architectural membrane structure performance testing device comprises a membrane material tensioning device, an artificial corrosion simulation device and a data acquisition system, the membrane material tensioning device is used for fixing a to-be-tested building membrane material and applying tensioning force to the membrane material during testing; the manual simulation corrosion device comprises a control module, and a booster water pump and an ultraviolet lamp tube which are connected with the control module; the control module simulates the corrosion and aging environment of the membrane material by quantitatively switching on and off the booster water pump and the ultraviolet lamp tube during testing; the data acquisition system comprises a laser displacement sensor, and when the building membrane material with the mark point deforms in the simulated membrane material corrosion and aging environment, the laser displacement sensor monitors the deformation amount corresponding to the mark point and forms test data; the tension force and direction of the membrane structure can be accurately controlled, long-term corrosion is carried out after tension is completed, and accurate mechanical property analysis and evaluation are carried out on the safety performance of the membrane structure before and after corrosion.

Description

Technical Field

[0001] The utility model relates to the technical field of safety assessment of architectural membrane structures after corrosion, in particular to a performance testing device for architectural membrane structures in simulated corrosion environments. Background Art

[0002] In the field of construction engineering, the tensile membrane structure is a widely used large-span tensile integral structure. This structure is favored by architects because of its advantages such as beauty, economy and ease of construction. Its stiffness is mainly provided by pre-tension. Only when the appropriate initial pre-tension is provided can the membrane structure have enough stiffness to resist external loads.

[0003] With the increasing application of membrane structures, a large number of large-span membrane structure industrial plant buildings have appeared in the southeastern coastal areas of my country. Due to the erosion of membrane structures by coastal atmosphere and ultraviolet rays, more and more membrane structures have safety hazards. Therefore, how to evaluate the service safety of membrane structures in corrosive environments is an urgent problem to be solved.

[0004] The equipment and methods provided by the prior art mostly focus on the field of material performance testing, mainly focusing on the mechanical properties of membrane structures under unexpected loads, such as: Patent 201910868057.6 provides a device and method for measuring the hail impact load of a membrane structure, the device for measuring the hail impact load of a membrane structure includes a frame, a tensioning mechanism, a hail transmitting mechanism and a signal acquisition mechanism, wherein the frame is a cross-shaped tensioning frame, the frame is formed with four symmetrically spaced mounting ends, and an electro-hydraulic push-pull rod is used to drive the clamping membrane device to move, so that the clamping device tensions the membrane structure to be tested and forms a membrane surface with a stable pre-tension.

[0005] Patent 201710954739.X provides a device and method for testing the complete performance of architectural membrane materials under force and thermal radiation. The single or double-axis membrane material specimen is placed on two or four groups of auxiliary slide blocks for tensioning to form a stable pre-tensioned membrane surface, and then a fixed thermal radiation source is sprayed on the membrane surface until the experiment is completed.

[0006] Patent 202211052746.8 provides a dual-purpose test device for saddle-shaped and plane membrane structures. A movable cross bar is used to determine the span-rise ratio of the saddle-shaped membrane structure. By repeatedly adjusting the manual winch, the prestress required for the test and the span-rise ratio of the saddle-shaped membrane structure can be obtained.

[0007] Summarizing the prior art, we can find that:

[0008] 1. The proposed test device and method have not yet taken into account the need for research on the safety performance of architectural membrane materials in actual service in a corrosive environment.

[0009] 2. Most of the proposed test devices are suitable for plane membrane tensioning, while most of the actual building membrane surfaces are saddle-shaped. The existing technology cannot control the deformation of the membrane surface in the plumb direction during the tensioning process, which will cause the membrane surface to deform in the plumb direction during the membrane tensioning process, seriously affecting the tensioning formation of the building membrane structure.

[0010] 3. There is a lack of accurate and reasonable assessment methods for the safety of architectural membrane structures before and after corrosion. Summary of the invention

[0011] The utility model proposes a performance testing device for building membrane structures in a simulated corrosion environment, which overcomes the shortcomings of the prior art that the deformation of the plumb direction of the tensioned membrane cannot be controlled and the safety performance evaluation of the membrane structure cannot be carried out under long-term corrosion conditions. The utility model can accurately control the tensioning force and direction of the membrane structure and carry out long-term corrosion after the tensioning is completed, so as to carry out accurate mechanical performance analysis and evaluation of the safety performance of the membrane structure before and after corrosion.

[0012] The utility model adopts the following technical solutions.

[0013] The device for testing the performance of architectural membrane structures in a simulated corrosion environment is used for performance testing and safety performance evaluation of architectural membrane materials, and comprises a membrane tensioning device, an artificial simulated corrosion device and a data acquisition system; the membrane tensioning device is used for fixing the architectural membrane material to be tested and applying tensioning force to the membrane material during the test; the artificial simulated corrosion device comprises a control module and a booster water pump and an ultraviolet lamp connected thereto, and the control module simulates the corrosion and aging environment of the membrane material by quantitatively switching the booster water pump and the ultraviolet lamp during the test; the data acquisition system comprises a laser displacement sensor, and when the architectural membrane material with a marked point is deformed in the simulated membrane corrosion and aging environment, the laser displacement sensor monitors the deformation corresponding to the marked point and forms test data.

[0014] The membrane material tensioning device comprises an upper convex clamping plate (2) and a lower concave clamping plate (3) for fixing a rectangular architectural membrane material (1); further comprising a slide rail support rod (4), a slide rail (5), a tension sensor (6) and a support frame (7); small holes are evenly drilled around the membrane material; when fixing the membrane material, the upper convex clamping plate (2) and the lower concave clamping plate (3) use high-strength boundary bolts (8) to pass through the small holes around the membrane material, and fix the four sides of the membrane material on the upper convex clamping plate (2) and the lower concave clamping plate (3) respectively;

[0015] The marking point on the architectural membrane material is a light scattering marking point (18) that can scatter light;

[0016] The artificial simulated corrosion device comprises a salt solution storage box (9), a booster water pump (10), an infusion tube (11), an atomizing nozzle (12), an ultraviolet lamp tube (13), an ultraviolet lamp cover (14), a controller (15), a support plate (16) and a support frame (17); the booster water pump (10) is connected to the salt solution storage box (9);

[0017] The front end of the infusion tube (11) is connected to a booster water pump (10); the rear end of the infusion tube (11) is connected to a plurality of atomizing nozzles (12) pointing toward the building membrane material to be tested; the ultraviolet lamp cover (14) is arranged outside the ultraviolet lamp tube (13); the controller is connected to the booster water pump (10) and the ultraviolet lamp tube (13); the atomizing nozzle (12), the ultraviolet lamp tube (13) and the ultraviolet lamp cover (14) are fixed to the support plate (16);

[0018] The support frame (17) is used to fix the support plate (16), and the projection area of ​​the support plate (16) on the ground is smaller than the surface area of ​​the architectural membrane material (1) to be tested.

[0019] The support frame (7) is composed of a top square steel tube (7-1), a bottom square steel tube (7-2), four-corner square steel tube columns (7-3), four-corner oblique square steel tubes (7-4) and a bottom steel sheet (7-5).

[0020] The slide rail support rod (4) is respectively connected to the slide rail (5) and the upper convex clamping plate (2) and the lower concave clamping plate (3); the slide rail support rod is placed on the slide rail with its bottom plate to slide; when the building membrane material (1) is tensioned, the slide rail (5) constrains the building membrane material (1) to move along the tensioning direction.

[0021] A U-shaped lock buckle (22) is welded at the middle position of the upper convex clamping plate (2) and the lower concave clamping plate (3). The number of upper convex clamping plates is two and they are parallel to each other. The number of lower concave clamping plates is two and they are parallel to each other. The top square steel tube (7-1) is welded with a tension female bolt (23) at a vertical position to the U-shaped lock buckle (22). The front and rear ends of the tension sensor (6) are respectively connected to lifting rings. The front lifting ring (24-1) is connected to the U-shaped lock buckle (22). The rear lifting ring (24-2) is connected to the front end of the universal ring (25). The rear end of the universal ring (25) is connected to the tension male screw (26). The architectural membrane material (1) is tensioned by uniformly rotating the tension male screw (26). The architectural membrane material (1) forms a saddle shape during the tensioning process due to the constraints of the upper convex clamping plate and the lower concave clamping plate. The tension value during the tensioning process is monitored by the tension sensor (6).

[0022] The four-corner square steel pipe column (7-3) is welded to the support frame (17), and the support frame (17) is welded to the support plate (16).

[0023] The salt solution storage box (9) outputs the corrosive salt solution to the booster water pump (10), and the booster water pump sprays a fixed amount of the corrosive salt solution through the liquid infusion pipe onto the building membrane material to be tested according to the instructions of the control module.

[0024] The controller is used for timing and quantitatively controlling the opening of the ultraviolet lamp tube (13) and the booster water pump (10) to spray the membrane material and perform ultraviolet aging tests.

[0025] Compared with the existing patents, the utility model is simple to manufacture and easy to operate. It is convenient to carry out relevant corrosion experiments and tests. It can accurately obtain the shape of the membrane structure before and after corrosion, and then accurately carry out the safety assessment of the membrane structure, and obtain the complete stress and strain of the membrane structure before and after corrosion. It can provide testing equipment and evaluation methods for all parties in the field such as building operators, construction parties, membrane material manufacturers and basic scientific research, filling a demand gap in the field of building membrane structures in corrosive environments, and has very important social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0027] Attached Figure 1 It is a structural schematic diagram of the tension completion test device of the utility model;

[0028] Attached Figure 2 It is a schematic diagram of the structure of the testing device of the utility model;

[0029] Attached Figure 3 It is a schematic diagram of the tensioning device of the utility model;

[0030] Attached Figure 4 It is a schematic diagram of the artificial simulation corrosion device of the utility model. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] As shown in the figure, the performance testing device of architectural membrane structure in simulated corrosion environment is used for performance testing and safety performance evaluation of architectural membrane materials, including a membrane tensioning device, an artificial simulated corrosion device and a data acquisition system; the membrane tensioning device is used to fix the architectural membrane material to be tested and apply tensioning force to the membrane material during the test; the artificial simulated corrosion device includes a control module and a booster water pump and an ultraviolet lamp connected thereto, and the control module simulates the corrosion and aging environment of the membrane material by quantitatively switching the booster water pump and the ultraviolet lamp during the test; the data acquisition system includes a laser displacement sensor, and when the architectural membrane material with a marked point is deformed in the simulated membrane corrosion and aging environment, the laser displacement sensor monitors the deformation corresponding to the marked point and forms test data.

[0035] The membrane material tensioning device includes an upper convex clamping plate 2 and a lower concave clamping plate 3 for fixing a rectangular building membrane material 1; it also includes a slide rail support rod 4, a slide rail 5, a tension sensor 6 and a support frame 7; small holes are evenly drilled around the membrane material; when fixing the membrane material, the upper convex clamping plate 2 and the lower concave clamping plate 3 use high-strength boundary bolts 8 to pass through the small holes around the membrane material, and fix the four sides of the membrane material on the upper convex clamping plate 2 and the lower concave clamping plate 3 respectively;

[0036] The marking point on the architectural membrane material is a scattered light marking point 18 that can diverge light;

[0037] The artificial simulated corrosion device includes a salt solution storage tank 9, a booster water pump 10, an infusion tube 11, an atomizing nozzle 12, an ultraviolet lamp tube 13, an ultraviolet lamp cover 14, a controller 15, a support plate 16 and a support frame 17; the booster water pump 10 is connected to the salt solution storage tank 9;

[0038] The head end of the infusion tube 11 is connected to a booster water pump 10; the end of the infusion tube 11 is connected to a plurality of atomizing nozzles 12 pointing to the building membrane material to be tested; the ultraviolet lamp cover 14 is arranged outside the ultraviolet lamp tube 13; the controller is connected to the booster water pump 10 and the ultraviolet lamp tube 13; the atomizing nozzle 12, the ultraviolet lamp tube 13 and the ultraviolet lamp cover 14 are fixed to the support plate 16;

[0039] The support frame 17 is used to fix the support plate 16 , and the projection area of ​​the support plate 16 on the ground is smaller than the surface area of ​​the architectural membrane material 1 to be tested.

[0040] The support frame 7 is composed of a top square steel tube 7-1, a bottom square steel tube 7-2, four corner square steel tube columns 7-3, four corner oblique square steel tubes 7-4 and a bottom steel sheet 7-5.

[0041] The slide rail support rod 4 is connected to the slide rail 5 and the upper convex clamping plate 2 and the lower concave clamping plate 3 respectively. The slide rail support rod is placed on the slide rail with its bottom sheet to slide. When the building membrane material 1 is tensioned, the slide rail 5 constrains the building membrane material 1 to move along the tensioning direction.

[0042] A U-shaped lock buckle 22 is welded at the middle position of the upper convex clamping plate 2 and the lower concave clamping plate 3. There are two upper convex clamping plates and they are parallel to each other. There are two lower concave clamping plates and they are parallel to each other. The top square steel pipe 7-1 is welded with a tension female bolt 23 at a vertical position to the U-shaped lock buckle 22. The front and rear ends of the tension sensor 6 are respectively connected with lifting rings. The front lifting ring 24-1 is connected to the U-shaped lock buckle 22, and the rear lifting ring 24-2 is connected to the front end of the universal ring 25. The rear end of the universal ring 25 is connected to the tension male screw 26. The architectural membrane material 1 is tensioned by uniformly rotating the tension male screw 26, so that the architectural membrane material 1 forms a saddle shape during the tensioning process due to the constraints of the upper convex clamping plate and the lower concave clamping plate, and the tension value during the tensioning process is monitored by the tension sensor 6.

[0043] The four-corner square steel pipe column 7 - 3 is welded to the support frame 17 , and the support frame 17 is welded to the support plate 16 .

[0044] The salt solution storage box 9 outputs the corrosive salt solution to the booster water pump 10, and the booster water pump sprays a quantitative amount of the corrosive salt solution through the infusion pipe to the building membrane material to be tested according to the instruction of the control module.

[0045] The controller is used to control the UV lamp 13 and the booster pump 10 to start spraying and UV aging test on the membrane material in a timely and quantitative manner.

Claims

1. Simulate corrosion environment architectural membrane structure performance test device, used for performance testing and safety performance evaluation of architectural membrane materials, Features: It includes a membrane material tensioning device, an artificial simulation corrosion device and a data acquisition system; the membrane material tensioning device is used to fix the architectural membrane material to be tested and apply tensioning force to the membrane material during the test; the artificial simulation corrosion device includes a control module and a booster water pump and an ultraviolet lamp connected thereto, and the control module simulates the membrane material corrosion and aging environment by quantitatively switching the booster water pump and the ultraviolet lamp during the test; the data acquisition system includes a laser displacement sensor, and when the architectural membrane material with a marking point is deformed in the simulated membrane material corrosion and aging environment, the laser displacement sensor monitors the deformation corresponding to the marking point and forms test data.

2. The simulated corrosion environment architectural membrane structure performance testing device according to claim 1, Features: The membrane material tensioning device comprises an upper convex clamping plate (2) and a lower concave clamping plate (3) for fixing a rectangular architectural membrane material (1); further comprising a slide rail support rod (4), a slide rail (5), a tension sensor (6) and a support frame (7); small holes are evenly drilled around the membrane material; when fixing the membrane material, the upper convex clamping plate (2) and the lower concave clamping plate (3) use high-strength boundary bolts (8) to pass through the small holes around the membrane material, and fix the four sides of the membrane material on the upper convex clamping plate (2) and the lower concave clamping plate (3) respectively; The artificial simulated corrosion device comprises a salt solution storage box (9), a booster water pump (10), an infusion tube (11), an atomizing nozzle (12), an ultraviolet lamp tube (13), an ultraviolet lamp cover (14), a controller (15), a support plate (16) and a support frame (17); the booster water pump (10) is connected to the salt solution storage box (9); The front end of the infusion tube (11) is connected to a booster water pump (10); the rear end of the infusion tube (11) is connected to a plurality of atomizing nozzles (12) pointing toward the building membrane material to be tested; the ultraviolet lamp cover (14) is arranged outside the ultraviolet lamp tube (13); the controller is connected to the booster water pump (10) and the ultraviolet lamp tube (13); the atomizing nozzle (12), the ultraviolet lamp tube (13) and the ultraviolet lamp cover (14) are fixed to the support plate (16); The support frame (17) is used to fix the support plate (16).

3. The simulated corrosion environment architectural membrane structure performance testing device according to claim 2, Features: The support frame (7) is composed of a top square steel tube (7-1), a bottom square steel tube (7-2), four-corner square steel tube columns (7-3), four-corner oblique square steel tubes (7-4) and a bottom steel sheet (7-5).

4. The performance testing device for architectural membrane structures in a simulated corrosion environment according to claim 2, Features: The slide rail support rod (4) is respectively connected to the slide rail (5) and the upper convex clamping plate (2) and the lower concave clamping plate (3); the slide rail support rod is placed on the slide rail with its bottom plate to slide; when the building membrane material (1) is tensioned, the slide rail (5) constrains the building membrane material (1) to move along the tensioning direction.

5. The device for testing the performance of architectural membrane structures in a simulated corrosion environment according to claim 3, Features: A U-shaped lock buckle (22) is welded at the middle position of the upper convex clamping plate (2) and the lower concave clamping plate (3). The number of upper convex clamping plates is two and they are parallel to each other. The number of lower concave clamping plates is two and they are parallel to each other. The top square steel tube (7-1) is welded with a tension female bolt (23) at a vertical position to the U-shaped lock buckle (22). The front and rear ends of the tension sensor (6) are respectively connected to lifting rings. The front lifting ring (24-1) is connected to the U-shaped lock buckle (22). The rear lifting ring (24-2) is connected to the front end of the universal ring (25). The rear end of the universal ring (25) is connected to the tension male screw (26). The architectural membrane material (1) is tensioned by uniformly rotating the tension male screw (26). The architectural membrane material (1) forms a saddle shape during the tensioning process due to the constraints of the upper convex clamping plate and the lower concave clamping plate. The tension value during the tensioning process is monitored by the tension sensor (6).

6. The simulated corrosion environment architectural membrane structure performance testing device according to claim 3, Features: The four-corner square steel pipe column (7-3) is welded to the support frame (17), and the support frame (17) is welded to the support plate (16).

7. The simulated corrosion environment architectural membrane structure performance testing device according to claim 2, Features: The salt solution storage box (9) outputs the corrosive salt solution to the booster water pump (10), and the booster water pump sprays a fixed amount of the corrosive salt solution through the liquid infusion pipe onto the building membrane material to be tested according to the instructions of the control module.

8. The device for testing the performance of architectural membrane structures in a simulated corrosion environment according to claim 2, Features: The controller is used for timing and quantitatively controlling the opening of the ultraviolet lamp tube (13) and the booster water pump (10) to spray the membrane material and perform ultraviolet aging tests.

9. The device for testing the performance of architectural membrane structures in a simulated corrosion environment according to claim 2, Features: The marking point on the architectural membrane material is a light scattering marking point (18) that can scatter light.

10. The simulated corrosion environment architectural membrane structure performance testing device according to claim 2, Features: The projection area of ​​the support plate (16) on the ground is smaller than the surface area of ​​the architectural membrane material (1) to be tested.

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