A device for testing the shear resistance of a curtain wall silicone sealant without lateral displacement

Abstract

The utility model relates to a kind of curtain wall silicone glue shear resistance no side shift testing device, comprising: shear test specimen, including two stone boards and the curtain wall silicone glue of connecting two stone boards;Four horizontal steel plates are respectively close to the upper and lower sides of two stone boards;Square steel hoop is fixed on the outside of horizontal steel plate;First sleeve group, including first screw, first sleeve and second screw, first screw and second screw are connected by first sleeve;First vertical guide rail, second vertical guide rail, both include first vertical square steel plate, second vertical square steel plate, the lower part of first vertical square steel plate is slidably sleeved in second vertical square steel plate inside;Second sleeve group, including second screw, second sleeve and third screw, second screw and third screw are connected by second sleeve;Compared with prior art, the utility model has the advantages of ensuring test accuracy and reliability, convenient operation and protecting test specimen, reducing manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of shear resistance testing technology in civil engineering, and in particular to a non-lateral displacement testing device for the shear resistance performance of silicone sealant for curtain walls. Background Technology

[0002] With the continuous development of the economy and society, silicone sealant plays an irreplaceable role in curtain wall structures due to its excellent waterproof and structural bonding properties. However, the performance of silicone sealant can change under different conditions, and environmental factors are one of the main causes of silicone sealant damage. Ultraviolet radiation, temperature changes, and moisture erosion all affect the performance of silicone sealant. The material quality of the silicone sealant directly affects its performance and service life. When using inferior silicone sealant, its composition may not meet requirements and may fail to meet performance indicators such as weather resistance and durability. Poor adhesion between silicone sealant and the substrate may be due to a mismatch between the chemical composition of the silicone sealant and the chemical properties of the substrate surface, which can also lead to insufficient adhesion. In testing, its shear strength is used to determine the extent of silicone sealant damage.

[0003] While existing technologies can test the shear strength of silicone sealant for curtain walls, the testing equipment itself is complex, requires many test components, and is time-consuming and costly, thus failing to meet the public's demand for testing the shear strength of silicone sealant for curtain walls.

[0004] CN202111246855.9 discloses a bonding strength testing device and method for luminous wall construction, relating to the field of bonding strength testing technology for luminous wall construction. It addresses the problem that most existing bonding strength testing devices involve manually pulling the stone in an unspecified temperature environment, and the residual adhesive after the test requires manual cleaning, leading to inconvenience and inaccuracy. The device comprises a top plate above the base plate, an electric slide rail structure at the upper end of the top plate, a vertical electric push rod assembly at the lower end of the electric slide rail structure, a clamping plate at the lower end of the vertical electric push rod assembly, a horizontal electric push rod assembly inside the clamping plate, a first clamping frame at the lower end of the clamping plate, a second clamping frame on one side of the first clamping frame, and a clamping seat at one end of both the first and second clamping frames. An infrared sensor is mounted on the side surface of the clamping seat. However, the structure is complex and difficult to maintain. It uses a complex linkage clamping mechanism, including a clamping plate, a first clamping frame, a second clamping frame, and a clamping seat, to grip the stone and transmit tensile force, which affects the accuracy of the test. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the prior art by providing a non-lateral displacement testing device for the shear resistance of curtain wall silicone sealant, eliminating lateral displacement, ensuring testing accuracy and reliability, simplifying the specimen clamping process, facilitating operation and protecting the specimen, and featuring modular components with strong versatility, thereby reducing manufacturing costs.

[0006] The objective of this utility model can be achieved through the following technical solutions: This utility model provides a device for testing the shear resistance of curtain wall silicone sealant without lateral displacement, comprising: Shear test specimens include two vertically placed stone slabs and the curtain wall silicone sealant connecting the two stone slabs; Four horizontal steel plates are respectively attached to the upper and lower sides of the two stone slabs; A square steel clamp is fixed to the outside of the transverse steel plate to securely connect the transverse steel plate to the stone slab. The first sleeve assembly includes a first screw for connecting the loading head of the testing machine, a first sleeve with internal threads, and a second screw for connecting the horizontal steel plate on the upper left side. The first screw and the second screw are connected by the internal threads of the first sleeve. The first vertical guide rail and the second vertical guide rail each include a first vertical square steel plate welded to the transverse steel plate and a second vertical square steel plate fixed to the test bench. The lower part of the first vertical square steel plate is slidably fitted inside the second vertical square steel plate. The first vertical square steel plate and the second vertical square steel plate are in sliding fit, and their gap is configured to allow the first vertical square steel plate to slide only in the vertical direction, while restricting its lateral movement. The second sleeve assembly includes a second screw for connecting the lower right horizontal steel plate, a second sleeve with internal threads, and a third screw. The second screw and the third screw are connected by the internal threads of the second sleeve. When the testing machine is loaded, the stone slab on the left side slides upward along the vertical direction without lateral displacement, driven by the guiding action of the first vertical guide rail. At the same time, the stone slab on the right side remains fixed without offset by the second vertical guide rail, so that the silicone sealant of the curtain wall can withstand the shearing action.

[0007] Furthermore, the contact surface between the transverse steel plate and the stone slab is flat to ensure a tight fit.

[0008] Furthermore, four square steel hoops are provided, and these square steel hoops are rigid components. Their clamping force is sufficient to prevent relative displacement between the transverse steel plate and the stone slab during testing.

[0009] Furthermore, the threads inside the first and second sleeves are respectively adapted to the threads of the connected screws, enabling conversion connections between screws of different specifications.

[0010] Furthermore, the bottom of the second vertical square steel plate is fixed to the test bench by a third screw.

[0011] Furthermore, the first vertical guide rail and the second vertical guide rail are symmetrically arranged; the upper end of the first vertical square steel plate of the first vertical guide rail is welded and fixed to the horizontal steel plate on the lower left, and the lower end is slidably sleeved in the second vertical square steel plate; the lower end of the first vertical square steel plate of the second vertical guide rail is welded and fixed to the horizontal steel plate on the upper right, and the upper end is slidably sleeved in the second vertical square steel plate.

[0012] Furthermore, there are two second screws connecting the same transverse steel plate, which are respectively connected to the upper loading head of the testing machine or the lower test platform foundation through the first sleeve assembly and the second sleeve assembly.

[0013] Furthermore, the square steel clamp is an open ring structure, and the opening is locked with fasteners to generate a clamping force that presses the transverse steel plate firmly against the stone slab.

[0014] Furthermore, the second screw of the first sleeve assembly is connected to the horizontal steel plate on the upper left side.

[0015] Furthermore, the second screw of the second sleeve assembly is connected to the horizontal steel plate on the lower right side.

[0016] The test method for the shear resistance of curtain wall silicone sealant without lateral displacement device includes the following steps: S1: Assemble the shear test specimen, transverse steel plate, square steel sleeve, first sleeve group, first vertical guide rail, second vertical guide rail and second sleeve group to obtain the test device; S2: Fix the testing device to the test bench with the third screw, and connect the first screw to the loading head of the testing machine; S3: Start the testing machine to load the material, causing the left stone slab to move vertically upward along the first vertical guide rail, while the right stone slab remains fixed; the loading process is continuous and uniform to ensure the stability of the test data. S4: Record the load applied by the testing machine and the resulting displacement data, and analyze the shear resistance of the curtain wall silicone sealant accordingly.

[0017] Furthermore, in S4, the analysis of the shear resistance of the curtain wall silicone sealant includes determining the shear strength or shear modulus of the curtain wall silicone sealant based on the load-displacement curve.

[0018] The method is applicable to testing silicone sealant specimens for curtain walls after aging under different environmental conditions.

[0019] Silicone sealant plays an irreplaceable role in curtain wall structures due to its excellent waterproof and structural bonding properties. However, during service, silicone sealant typically experiences changes in elongation, hardness, and adhesion strength under environmental factors, thus reducing its service life. This study investigated the changes in shear resistance of silicone sealant under ultraviolet radiation, different temperatures, and simulated acid rain conditions to explore its aging behavior and further predict the service life of dry-hanging curtain walls.

[0020] Compared with the prior art, the present invention has the following advantages: (1) Eliminating lateral offset to ensure test accuracy and reliability. The design of the vertical guide rail solves the problem of lateral offset of the specimen in traditional testing methods. The first and second vertical guide rails in the device are similar in structure to sliding bearings. Through the precise sliding fit between the first vertical square steel plate and the second vertical square steel plate, the specimen (left stone slab) is forced to move strictly in the vertical direction. This design ensures that the shear force is applied to the curtain wall silicone sealant in a pure and eccentric manner, effectively avoiding the additional bending moment caused by specimen offset, thus providing a guarantee for obtaining accurate and reliable shear performance data (such as shear strength and shear modulus). The overall layout of the device is symmetrical and reasonable, and the force path is clear. The left side is a sliding unit and the right side is a fixed unit. Through the constraints of up, down, left and right, a stable testing system is formed.

[0021] (2) Simplified specimen clamping process, convenient operation and protection of specimens. Traditional methods require drilling holes in the stone slab for fixing, which is not only complicated and time-consuming, but may also damage the specimen itself and affect the representativeness of the test results. This invention adopts a combination of horizontal steel plate and square steel clamp for fixing. The horizontal steel plate is close to the surface of the stone slab, and then it is clamped and fixed by the square steel clamp. This method does not require any destructive processing of the stone slab, and the clamping and disassembly are very simple and quick, improving the testing efficiency and protecting the integrity of the specimen.

[0022] (3) The modularity and versatility of the components reduce manufacturing costs. The device uses sleeve assemblies (first sleeve assembly and second sleeve assembly) as connecting conversion parts. The sleeves are machined with matching threads, which can flexibly connect screws of different specifications. This modular design gives the device good versatility, making it easy to adapt to different models of testing machines, reducing the cost and time of customizing fixtures for specific equipment. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of a test device for the shear resistance of silicone sealant for curtain walls without lateral displacement. Figure 2 This is a schematic diagram of the shear test specimen of this utility model; Figure 3 This is a schematic diagram of the structure of the first sleeve assembly of this utility model; Figure 4 This is a schematic diagram of the structure of the first vertical guide rail of this utility model; Figure 5 This is a schematic diagram of the structure of the second vertical guide rail of this utility model; Figure 6 This is a schematic diagram of the structure of the second sleeve assembly of this utility model.

[0024] Reference numerals: 1. First screw, 2. First sleeve, 3. Second screw, 4. Horizontal steel plate, 5. Square steel clamp, 6. Stone slab, 7. Silicone sealant, 8. First vertical square steel plate, 9. Second vertical square steel plate, 10. Third screw, 11. Second sleeve. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0026] Example 1 This embodiment provides a device for testing the shear resistance of silicone sealant for curtain walls without lateral displacement, such as... Figure 1-6 As shown, it includes: The shear test specimen includes two vertically placed stone slabs 6 and the curtain wall silicone sealant 7 connecting the two stone slabs 6. Four horizontal steel plates 4 are respectively attached to the upper and lower sides of the two stone slabs 6; A square steel clamp 5 is fixed to the outside of the transverse steel plate 4 and is used to fasten the transverse steel plate 4 to the stone slab 6. The first sleeve assembly includes a first screw 1 for connecting the loading head of the testing machine, a first sleeve 2 with internal threads, and a second screw 3 for connecting the horizontal steel plate 4 on the upper left side. The first screw 1 and the second screw 3 are connected by the internal threads of the first sleeve 2. Both the first vertical guide rail and the second vertical guide rail include a first vertical square steel plate 8 welded to the transverse steel plate 4 and a second vertical square steel plate 9 fixed to the test bench. The lower part of the first vertical square steel plate 8 is slidably fitted inside the second vertical square steel plate 9. The first vertical square steel plate 8 and the second vertical square steel plate 9 are in sliding fit, and their gap is configured to allow the first vertical square steel plate 8 to slide in the vertical direction only, while restricting its lateral movement. The second sleeve assembly includes a second screw 3 for connecting the right lower horizontal steel plate 4, a second sleeve 11 with internal threads, and a third screw 10. The second screw 3 and the third screw 10 are connected by the internal threads of the second sleeve 11. When the testing machine is loaded, the left stone slab 6, guided by the first vertical guide rail, drives the connected horizontal steel plate 4 and the first vertical square steel plate 8 to slide upward vertically without lateral displacement. At the same time, the right stone slab 6 is fixed without offset by the second vertical guide rail, so that the curtain wall silicone sealant 7 can withstand the shearing action.

[0027] Example 2 This embodiment provides a device for testing the shear resistance of silicone sealant for curtain walls without lateral displacement, such as... Figure 1-6 As shown, it includes: The shear test specimen includes two vertically placed stone slabs 6 and the curtain wall silicone sealant 7 connecting the two stone slabs 6. Four horizontal steel plates 4 are respectively attached to the upper and lower sides of the two stone slabs 6; A square steel clamp 5 is fixed to the outside of the transverse steel plate 4 and is used to fasten the transverse steel plate 4 to the stone slab 6. The first sleeve assembly includes a first screw 1 for connecting the loading head of the testing machine, a first sleeve 2 with internal threads, and a second screw 3 for connecting the horizontal steel plate 4 on the upper left side. The first screw 1 and the second screw 3 are connected by the internal threads of the first sleeve 2. Both the first vertical guide rail and the second vertical guide rail include a first vertical square steel plate 8 welded to the transverse steel plate 4 and a second vertical square steel plate 9 fixed to the test bench. The lower part of the first vertical square steel plate 8 is slidably fitted inside the second vertical square steel plate 9. The first vertical square steel plate 8 and the second vertical square steel plate 9 are in sliding fit, and their gap is configured to allow the first vertical square steel plate 8 to slide in the vertical direction only, while restricting its lateral movement. The second sleeve assembly includes a second screw 3 for connecting the right lower horizontal steel plate 4, a second sleeve 11 with internal threads, and a third screw 10. The second screw 3 and the third screw 10 are connected by the internal threads of the second sleeve 11. When the testing machine is loaded, the left stone slab 6, guided by the first vertical guide rail, drives the connected horizontal steel plate 4 and the first vertical square steel plate 8 to slide upward vertically without lateral displacement. At the same time, the right stone slab 6 is fixed without offset by the second vertical guide rail, so that the curtain wall silicone sealant 7 can withstand the shearing action.

[0028] In a specific embodiment, the contact surface between the transverse steel plate 4 and the stone slab 6 is a plane to ensure a tight fit.

[0029] In a specific embodiment, four square steel clamps 5 are provided, and each square steel clamp 5 is a rigid component. Its clamping force is sufficient to prevent relative displacement between the transverse steel plate 4 and the stone slab 6 during testing.

[0030] In a specific embodiment, the threads inside the first sleeve 2 and the second sleeve 11 are respectively adapted to the threads of the connected screws, so as to realize the conversion connection between screws of different specifications.

[0031] In a specific embodiment, the bottom of the second vertical square steel plate 9 is fixed to the test bench by a third screw 10.

[0032] In a specific embodiment, the first vertical guide rail and the second vertical guide rail are symmetrically arranged; the upper end of the first vertical square steel plate 8 of the first vertical guide rail is welded and fixed to the horizontal steel plate 4 on the lower left, and the lower end is slidably sleeved in the second vertical square steel plate 9; the lower end of the first vertical square steel plate 8 of the second vertical guide rail is welded and fixed to the horizontal steel plate 4 on the upper right, and the upper end is slidably sleeved in the second vertical square steel plate 9.

[0033] In a specific embodiment, there are two second screws 3 connecting the same transverse steel plate 4, which are respectively connected to the upper loading head of the testing machine or the lower foundation of the testing platform through the first sleeve group and the second sleeve group.

[0034] In a specific embodiment, the square steel sleeve 5 is an open ring structure, and the opening is locked with fasteners to generate a clamping force that presses the transverse steel plate 4 onto the stone slab 6.

[0035] In a specific embodiment, the second screw 3 of the first sleeve assembly is connected to the horizontal steel plate 4 on the upper left side.

[0036] In a specific embodiment, the second screw 3 of the second sleeve assembly is connected to the horizontal steel plate 4 on the lower right side.

[0037] The test method for the shear resistance of curtain wall silicone sealant without lateral displacement device includes the following steps: S1: Assemble the shear test specimen, transverse steel plate 4, square steel sleeve 5, first sleeve group, first vertical guide rail, second vertical guide rail and second sleeve group to obtain the test device; S2: Fix the testing device to the test bench with the third screw 10, and connect the first screw 1 to the loading head of the testing machine; S3: Start the testing machine to load the material, causing the left stone slab 6 to move vertically upward along the first vertical guide rail, while the right stone slab 6 remains fixed; the loading process is continuous and uniform to ensure the stability of the test data. S4: Record the load applied by the testing machine and the resulting displacement data, and analyze the shear resistance of the curtain wall silicone sealant 7 accordingly.

[0038] In a specific implementation, in S4, the analysis of the shear resistance of the curtain wall silicone sealant 7 includes determining the shear strength or shear modulus of the curtain wall silicone sealant 7 based on the load-displacement curve.

[0039] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0040] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A test device for the shear resistance of silicone sealant for curtain walls without lateral displacement, characterized in that, include: Shear test specimens include two vertically placed stone slabs (6) and curtain wall silicone sealant (7) connecting the two stone slabs (6). Four horizontal steel plates (4) are respectively attached to the upper and lower sides of the two stone slabs (6); A square steel hoop (5) is fixed to the outside of the transverse steel plate (4) to securely connect the transverse steel plate (4) to the stone slab (6). The first sleeve assembly includes a first screw (1) for connecting the loading head of the testing machine, a first sleeve (2) with internal threads, and a second screw (3) for connecting the transverse steel plate (4). The first screw (1) and the second screw (3) are connected through the first sleeve (2). The first vertical guide rail and the second vertical guide rail both include a first vertical square steel plate (8) welded to the transverse steel plate (4) and a second vertical square steel plate (9) fixed to the test bench. The lower part of the first vertical square steel plate (8) is slidably fitted inside the second vertical square steel plate (9). The second sleeve assembly includes a second screw (3) for connecting the transverse steel plate (4), a second sleeve (11) with internal threads, and a third screw (10), wherein the second screw (3) and the third screw (10) are connected by the second sleeve (11); When the testing machine is loaded, the left stone slab (6) drives the connected horizontal steel plate (4) and the first vertical square steel plate (8) to slide upward in the vertical direction without lateral displacement through the guidance of the first vertical guide rail. At the same time, the right stone slab (6) is fixed without offset through the second vertical guide rail, so that the curtain wall silicone sealant (7) can withstand the shearing action.

2. The curtain wall silicone sealant shear performance non-lateral displacement testing device according to claim 1, characterized in that, The contact surface between the transverse steel plate (4) and the stone slab (6) is a plane to ensure a tight fit.

3. The curtain wall silicone sealant shear performance non-lateral displacement testing device according to claim 1, characterized in that, There are four square steel hoops (5), and the square steel hoops (5) are rigid components.

4. The curtain wall silicone sealant shear performance non-lateral displacement testing device according to claim 1, characterized in that, The threads inside the first sleeve (2) and the second sleeve (11) are adapted to the threads of the connected screws, so as to realize the conversion connection between screws of different specifications.

5. The non-lateral displacement testing device for the shear resistance of curtain wall silicone sealant according to claim 1, characterized in that, The bottom of the second vertical square steel plate (9) is fixed to the test bench by the third screw (10).

6. The curtain wall silicone sealant shear performance non-lateral displacement testing device according to claim 1, characterized in that, The first vertical guide rail and the second vertical guide rail are arranged symmetrically. The upper end of the first vertical square steel plate (8) of the first vertical guide rail is welded and fixed to the horizontal steel plate (4) on the lower left side, and the lower end is slidably sleeved in the second vertical square steel plate (9). The lower end of the first vertical square steel plate (8) of the second vertical guide rail is welded and fixed to the horizontal steel plate (4) on the upper right side, and the upper end is slidably sleeved in the second vertical square steel plate (9).

7. The curtain wall silicone sealant shear performance non-lateral displacement testing device according to claim 1, characterized in that, Two second screws (3) are provided to connect the same transverse steel plate (4), which are respectively connected to the upper loading head of the testing machine or the lower test bench foundation through the first sleeve group and the second sleeve group.

8. The non-lateral displacement testing device for the shear resistance of curtain wall silicone sealant according to claim 1, characterized in that, The square steel sleeve (5) is an open ring structure, and the opening is locked by fasteners.

9. The shear resistance test device for curtain wall silicone sealant without lateral displacement according to claim 1, characterized in that, The second screw (3) of the first sleeve assembly is connected to the horizontal steel plate (4) on the upper left side.

10. The curtain wall silicone sealant shear performance non-lateral displacement testing device according to claim 1, characterized in that, The second screw (3) of the second sleeve assembly is connected to the horizontal steel plate (4) on the lower right side.

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