Curtain wall silicone adhesive anti-shearing performance non-sidesway testing device and curtain wall silicone adhesive anti-shearing performance non-sidesway testing method

Abstract

The invention relates to a curtain wall silicone adhesive shear performance non-sidesway testing device and method, and the device comprises a shear test piece which comprises two stone plates and a curtain wall silicone adhesive connected with the two stone plates; the four transverse steel plates are tightly attached to the upper sides and the lower sides of the two stone plates respectively; the square steel hoop is fixed on the outer side of the transverse steel plate; the first sleeve group comprises a first screw, a first sleeve and a second screw, and the first screw and the second screw are connected through the first sleeve; the first vertical guide rail and the second vertical guide rail each comprise a first vertical square steel plate and a second vertical square steel plate, and the lower portion of the first vertical square steel plate is slidably arranged in the second vertical square steel plate in a sleeved mode; the second sleeve group comprises a second screw, a second sleeve and a third screw, and the second screw and the third screw are connected through the second sleeve; compared with the prior art, the device has the advantages of ensuring the test precision and reliability, being convenient to operate, protecting the test piece, reducing the manufacturing cost and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of civil engineering shear test, in particular to a curtain wall silicone adhesive shear performance no side shift test device and method. BACKGROUND

[0002] With the continuous development of economic society, curtain wall silicone adhesive plays an irreplaceable role in curtain wall structure due to its excellent performance in waterproof structure and structural bonding. However, the performance of silicone adhesive may change under different conditions, and environmental factors are one of the main reasons for the damage of silicone adhesive. Ultraviolet rays, temperature changes, water vapor erosion and other factors will affect the performance of silicone adhesive. The material quality of silicone adhesive directly affects its performance and service life. When using inferior silicone adhesive, its composition may not meet the requirements and cannot meet the performance indicators such as weather resistance and durability. The bonding performance between silicone adhesive and substrate may be poor because the chemical composition of silicone adhesive does not match the chemical properties of the substrate surface, which may also cause insufficient bonding force. The damage of silicone adhesive can be judged by testing its shear performance in the test.

[0003] The existing technology for testing the shear performance of curtain wall silicone adhesive can test the shear strength, but the test device itself is complex in design, requires more test components, and takes more time and cost, which cannot meet the demand of the public for testing the shear performance of curtain wall silicone adhesive.

[0004] CN202111246855.9 discloses a bonding strength test device and test method for light-emitting wall construction, relating to the technical field of bonding strength test for light-emitting wall construction. To solve the problem that most existing bonding strength test devices are manually pulled by stone in a non-specific temperature environment, and the residual glue after the test needs to be manually cleaned, resulting in inconvenient and inaccurate overall test. The top plate is arranged above the grounding plate, the upper end of the top plate is provided with an electric sliding rail structure, the lower end of the electric sliding rail structure is provided with a vertical electric push rod assembly, the lower end of the vertical electric push rod assembly is provided with a clamping plate, the inside of the clamping plate is provided with a horizontal electric push rod assembly, the lower end of the clamping plate is provided with a first clamping frame, one side of the first clamping frame is provided with a second clamping frame, one end of the first clamping frame and the second clamping frame is provided with a clamping seat, and the side surface of the clamping seat is provided with an infrared sensor. However, the structure is complex and difficult to maintain, and a set of complex connecting rod clamping mechanism such as clamping plate, first clamping frame, second clamping frame and clamping seat is used to grab the stone and transfer the pulling force, which affects the test precision. SUMMARY

[0005] The present application aims to overcome the defects of the prior art and provide a curtain wall silicone glue shear resistance no-side shift testing device and method, which eliminates lateral deviation, ensures testing accuracy and reliability, simplifies the clamping process of the test piece, is convenient to operate and protects the test piece, has strong component modularity and universality, and reduces manufacturing cost.

[0006] The object of the present application can be achieved by the following technical solutions: The present application provides a curtain wall silicone glue shear resistance no-side shift testing device, comprising: The shear test piece comprises two vertically placed stone plates and curtain wall silicone glue connecting the two stone plates. Four horizontal steel plates are respectively attached to the upper and lower sides of the two stone plates. A square steel hoop is fixed to the outer side of the horizontal steel plate for tightly connecting the horizontal steel plate and the stone plate. The first sleeve group comprises a first screw for connecting the testing machine loading head, a first sleeve with a thread inside, and a second screw for connecting the left upper horizontal steel plate, and the first screw and the second screw are connected through the thread inside the first sleeve. The first vertical guide rail and the second vertical guide rail each comprise a first vertical square steel plate welded to the horizontal steel plate and a second vertical square steel plate fixed to the test bench, and the lower part of the first vertical square steel plate is slidably sleeved inside the second vertical square steel plate. The second sleeve group comprises a second screw for connecting the right lower horizontal steel plate, a second sleeve with a thread inside, and a third screw, and the second screw and the third screw are connected through the thread inside the second sleeve. When the testing machine is loaded, the left stone plate drives the connected horizontal steel plate and the first vertical square steel plate to slide upward along the vertical direction without side shift under the guidance of the first vertical guide rail, and the right stone plate is kept fixed without deviation through the second vertical guide rail, so that the curtain wall silicone glue bears the shearing action.

[0007] Further, the contact surface of the horizontal steel plate and the stone plate is a plane to ensure close fitting.

[0008] Further, the square steel hoop is provided with four square steel hoops, which are rigid components.

[0009] Further, the threads inside the first sleeve and the second sleeve are respectively matched with the threads of the connected screws to realize conversion connection between different specifications of screws.

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

[0011] Further, 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 lower left transverse steel plate, 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 upper right transverse steel plate, and the upper end is slidably sleeved in the second vertical square steel plate.

[0012] Further, the second screw connecting the same transverse steel plate is provided with two, which are connected with the upper test machine loading head or the lower test bench foundation through the first sleeve group and the second sleeve group.

[0013] Further, the square steel sleeve is an open ring structure, and the opening is locked by a fastener. A clamping force is generated to press the transverse steel plate on the stone plate.

[0014] The application also provides a method for testing the shear performance of a curtain wall silicone adhesive without lateral displacement, using the curtain wall silicone adhesive shear performance test device without lateral displacement, comprising the following steps: S1: Assemble the shear test specimen, the transverse steel plate, the square steel sleeve, the first sleeve group, the first vertical guide rail, the second vertical guide rail and the second sleeve group to obtain a test device; S2: Fix the test device to the test bench by a third screw, and connect the first screw with the loading head of the testing machine; S3: Start the testing machine to load, so that the left stone plate moves vertically upward along the first vertical guide rail, while the right stone plate 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 displacement data generated, and analyze the shear performance of the curtain wall silicone adhesive accordingly.

[0015] Further, in S4, the analysis of the shear performance of the curtain wall silicone adhesive includes determining the shear strength or shear modulus of the curtain wall silicone adhesive according to the load-displacement curve.

[0016] The method is suitable for testing curtain wall silicone adhesive specimens after aging treatment under different environmental conditions.

[0017] Curtain wall silicone glue plays an irreplaceable role in the curtain wall structure due to its excellent performance in waterproof structure and structural bonding. However, the elongation, hardness and adhesion of curtain wall silicone glue often change under the influence of environmental factors during service, thereby reducing its service life. The research carried out in the test explores the aging behavior of curtain wall silicone glue by testing the changes in its shear performance after ultraviolet irradiation, different temperatures and simulated acid rain conditions, thereby further predicting the service life of dry hanging curtain wall.

[0018] Compared with the prior art, the present application has the following advantages: (1) Eliminate lateral deviation, ensure test accuracy and reliability. Through the design of vertical guide rails, the problem of lateral deviation of test pieces in traditional test methods is solved. The first vertical guide rail and the second vertical guide rail in the device are similar in structure to sliding bearings, and through the precise sliding fit of the first vertical square steel plate in the second vertical square steel plate, the test piece (left stone plate) is strictly guided to move along the vertical direction. This design ensures that the shear force acts on the curtain wall silicone glue in a pure and eccentric manner, effectively avoiding additional bending moments caused by test piece deviation, thereby 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 stress path is clear. The left side is a slidable unit, and the right side is a fixed unit, which forms a stable test system through up, down, left and right constraints.

[0019] (2) Simplify the clamping process of test pieces, and the operation is convenient and protects the test pieces. The traditional method needs to drill holes in the stone plate for fixation, which not only has complex process and time-consuming, but also may damage the test piece itself and affect the representativeness of the test results. The present application adopts a combined fixation method of horizontal steel plate and square steel sleeve. The horizontal steel plate is tightly attached to the surface of the stone plate, and then the square steel sleeve is used to clamp and fix it. This method does not require any destructive processing of the stone plate, and the clamping and disassembly are very simple and fast, which improves the test efficiency and protects the integrity of the test piece.

[0020] (3) Strong modularity and universality of components, reduce manufacturing cost. The device uses sleeve sets (first sleeve set and second sleeve set) as connecting conversion pieces. The inside of the sleeve is processed with adaptive threads, which can flexibly connect screws of different specifications. This modular design gives the device good universality, making it easy to adapt to different types of testing machines, reducing the cost and time of customizing fixtures for specific equipment. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 Figure 1 is a structural schematic diagram of the curtain wall silicone glue shear performance non-deviation test device of the present application; Fig. 2 Figure 2 is a structural schematic diagram of the shear test test piece of the present application; Fig. 3 This is a schematic diagram of the structure of the first sleeve assembly of the present invention; Fig. 4 This is a schematic diagram of the structure of the first vertical guide rail of the present invention; Fig. 5 This is a schematic diagram of the structure of the second vertical guide rail of the present invention; Fig. 6 This is a schematic diagram of the structure of the second sleeve assembly of the present invention.

[0022] 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

[0023] 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.

[0024] Example 1 This embodiment provides a device for testing the shear resistance of silicone sealant for curtain walls without lateral displacement, such as... Figs. 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 plate 6 drives the connected horizontal steel plate 4 and the first vertical square steel plate 8 to slide upward along the vertical direction without lateral displacement through the guiding effect of the first vertical guide rail, while the right stone plate 6 is kept fixed without deviation through the second vertical guide rail, so that the curtain wall silicone glue 7 bears the shearing action.

[0025] Embodiment 2 The embodiment provides a device for testing the shearing performance of curtain wall silicone glue without lateral displacement, which comprises the following components as shown in the drawings: Figs. 1-6 A shearing test specimen, which comprises two vertically placed stone plates 6 and curtain wall silicone glue 7 connecting the two stone plates 6; Four horizontal steel plates 4, which are respectively attached to the upper and lower sides of the two stone plates 6; A square steel hoop 5, which is fixed to the outer side of the horizontal steel plate 4 and is used for tightly connecting the horizontal steel plate 4 and the stone plate 6; A first sleeve group, which comprises a first screw 1 for connecting the loading head of the testing machine, a first sleeve 2 with a thread inside, and a second screw 3 for connecting the left upper horizontal steel plate 4, wherein the first screw 1 and the second screw 3 are connected through the thread inside the first sleeve 2; A first vertical guide rail and a second vertical guide rail, which both comprise a first vertical square steel plate 8 welded to the horizontal steel plate 4 and a second vertical square steel plate 9 fixed to the test bench, wherein the lower part of the first vertical square steel plate 8 is slidably sleeved 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 the gap therebetween is configured to allow the first vertical square steel plate 8 to slide along the vertical direction only and restrict the lateral movement thereof; A second sleeve group, which comprises a second screw 3 for connecting the right lower horizontal steel plate 4, a second sleeve 11 with a thread inside, and a third screw 10, wherein the second screw 3 and the third screw 10 are connected through the thread inside the second sleeve 11; When the testing machine is loaded, the left stone plate 6 drives the connected horizontal steel plate 4 and the first vertical square steel plate 8 to slide upward along the vertical direction without lateral displacement through the guiding effect of the first vertical guide rail, while the right stone plate 6 is kept fixed without deviation through the second vertical guide rail, so that the curtain wall silicone glue 7 bears the shearing action. In the specific embodiment, the contact surface of the horizontal steel plate 4 and the stone plate 6 is a plane, so as to ensure the close attachment.

[0026] In the specific embodiment, four square steel hoops 5 are arranged, and the square steel hoop 5 is a rigid member, which has sufficient clamping force to prevent the relative displacement between the horizontal steel plate 4 and the stone plate 6 during the test.

[0027]

[0028] ​In the specific embodiment, the threads inside the first sleeve 2 and the second sleeve 11 are respectively matched with the threads of the connected screws, realizing the conversion connection between screws of different specifications.

[0029] In the specific embodiment, the bottom of the second vertical square steel plate 9 is fixed to the test bench by the third screw 10.

[0030] In the 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 lower left transverse steel plate 4, and the lower end is slidingly 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 upper right transverse steel plate 4, and the upper end is slidingly sleeved in the second vertical square steel plate 9.

[0031] In the specific embodiment, the second screw 3 connecting the same transverse steel plate 4 is provided with two, which are respectively connected with the upper test machine loading head or the lower test bench foundation through the first sleeve group and the second sleeve group.

[0032] In the specific embodiment, the square steel sleeve 5 is an open ring structure, and the opening is locked by a fastener. To generate a clamping force that presses the transverse steel plate 4 on the stone plate 6.

[0033] The embodiment also provides a curtain wall silicone glue shear performance no side shift test method, using the curtain wall silicone glue shear performance no side shift test device, comprising the following steps: S1: Assemble the shear test specimen, the transverse steel plate 4, the square steel sleeve 5, the first sleeve group, the first vertical guide rail, the second vertical guide rail and the second sleeve group to obtain the test device; S2: Fix the test device on the test bench by the third screw 10, and connect the first screw 1 with the loading head of the testing machine; S3: Start the testing machine to load, so that the left stone plate 6 moves vertically upward along the first vertical guide rail, while the right stone plate 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 displacement data generated, and analyze the shear performance of the curtain wall silicone glue 7 accordingly.

[0034] In the specific embodiment, in S4, the analysis of the shear performance of the curtain wall silicone glue 7 includes determining the shear strength or shear modulus of the curtain wall silicone glue 7 according to the load-displacement curve.

[0035] The components not described in detail in the embodiment are existing components that can be purchased in the public channel.

[0036] The foregoing description of the embodiments has been presented for the purpose of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form disclosed. Modifications and variations are possible in light of the above teachings or can be acquired from practice of the application. As well, the description is presented in the context of the preferred embodiments as a number of alternatives. It is not intended to limit the application to the precise form described.

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. A method for testing the shear resistance of curtain wall silicone sealant without lateral displacement, characterized in that, Using the curtain wall silicone sealant shear performance non-lateral displacement testing device as described in any one of claims 1-8, the following steps are included: 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 test device to the test bench with the third screw (10) and connect the first screw (1) to the loading head of the test machine; S3: Start the testing machine to load the material, so that the left stone slab (6) moves vertically upward along the first vertical guide rail, while the right stone slab (6) remains fixed. S4: Record the load applied by the testing machine and the displacement data generated, and analyze the shear resistance of the curtain wall silicone sealant (7) accordingly.

10. The method for testing the shear resistance of curtain wall silicone sealant without lateral displacement according to claim 9, characterized in that, 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.

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