Field detection drawing device for building curtain wall structural adhesive and detection method of field detection drawing device

Abstract

The invention discloses a drawing device for building curtain wall structural adhesive field detection and a detection method thereof.The drawing device comprises a center adjusting system and a drawing system, the center adjusting system comprises a working platform and an eccentric adjuster, and the working platform comprises a first workpiece and a second workpiece fixedly connected to the first workpiece; the second workpiece comprises angle steel and two C-shaped steel blocks, the angle steel is fixedly connected to the first workpiece, each C-shaped steel block comprises an upper horizontal plate, a vertical plate and a lower horizontal plate which are sequentially connected from top to bottom, the lower horizontal plates are fixedly connected to the angle steel, the height of the vertical plates is adjustable, and the upper horizontal plates are provided with sliding rails in the length direction; the eccentric adjuster is mounted on the sliding rail; and the drawing system is in sliding connection with the sliding rail through an eccentric regulator. The problems that the drawing force axis of an existing drawing device is difficult to align with the centroid of the structural adhesive, eccentric loads are easily generated, the safety is poor due to the fact that detection personnel need to hold the device with hands, and the structural adhesive strength detection result is inaccurate are solved.

Description

Technical Field

[0001] This invention belongs to the technical field of building engineering testing equipment, specifically, it relates to a pull-out device and testing method for on-site testing of structural adhesives for building curtain walls. Background Technology

[0002] As the external envelope of a building, the safety and stability of a building's curtain wall are directly related to the safety of people's lives and property. A building curtain wall typically consists of three parts: panels (exterior cladding materials such as glass, metal panels, or stone), profiles (extruded aluminum alloy frame components, including beams and columns), and structural adhesive (a silicone sealant specifically designed for building curtain walls). The structural adhesive, as a key material connecting the curtain wall profiles and panels, bears important functions such as load transfer and waterproofing. Performing tensile testing on the structural adhesive to evaluate its bonding performance and reliability is a crucial step in ensuring the quality of curtain wall projects.

[0003] Currently, on-site testing of structural adhesives for building curtain walls typically uses a pull-out tester. However, existing on-site pull-out testing devices have the following technical drawbacks: the pull-out force axis of the pull-out tester is difficult to accurately align with the centroid of the structural adhesive being tested, or it is difficult to ensure that the pull-out force axis is perpendicular to the bonding surface between the adhesive and the profile. Existing pull-out testers cannot be fixed in place, which easily generates eccentric loads, resulting in test results that do not truly reflect the actual tensile strength of the structural adhesive. At the same time, during on-site testing, the pull-out tester is usually placed directly on the aluminum alloy profile of the building curtain wall, relying on the tester to support it by hand, which makes it difficult to guarantee stability and poses safety hazards. In addition, the pull-out force may cause local deformation of the profile, affecting the accuracy of the test and increasing repair costs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and provide a pull-out device for on-site testing of structural adhesives for building curtain walls. This device solves the problems of existing pull-out devices having difficulty aligning the pull-out force axis with the centroid of the structural adhesive, easily generating eccentric loads, requiring testing personnel to support it manually, resulting in poor safety, and inaccurate structural adhesive strength test results.

[0005] The second objective of the invention is to provide a method for on-site testing of structural adhesives for building curtain walls.

[0006] The objective of this invention is achieved through the following technical solution: a pull-out device for on-site testing of structural adhesive for building curtain walls, comprising a central adjustment system and a pull-out system.

[0007] The central adjustment system includes a working platform and an eccentric adjuster. The working platform includes a first workpiece and a second workpiece fixedly connected to the first workpiece. The second workpiece includes an angle steel and two C-shaped steel blocks. The angle steel is fixedly connected to the first workpiece. The C-shaped steel blocks include an upper horizontal plate, a vertical plate, and a lower horizontal plate connected sequentially. The lower horizontal plate is fixedly connected to the angle steel. The height of the vertical plate is adjustable. The upper horizontal plate is provided with a slide rail along its length. The eccentric adjuster is installed on the slide rail. The drawing system is slidably connected to the slide rail through the eccentric adjuster.

[0008] Preferably, the vertical plate adopts any of the following structures:

[0009] The vertical plate includes an outer sleeve and an inner sliding column. The upper end of the inner sliding column is connected to the upper horizontal plate and the lower end is connected to the lower horizontal plate. The inner sliding column is slidably fitted inside the outer sleeve. The outer sleeve is provided with a locking bolt. When tightened, the end of the locking bolt abuts against the inner sliding column to lock the height.

[0010] The vertical plate includes an inner sliding post and an outer sleeve that are threaded together. The upper end of the inner sliding post is connected to the upper horizontal plate, and the lower end is connected to the lower horizontal plate.

[0011] The vertical plate is a multi-section telescopic sleeve structure;

[0012] The vertical plate includes an outer sleeve and an inner sliding column. The upper end of the inner sliding column is connected to the upper horizontal plate and the lower end is connected to the lower horizontal plate. The inner sliding column and the outer sleeve are provided with a plurality of positioning holes, and positioning pins are provided in the positioning holes for pluggability.

[0013] Preferably, the upper horizontal plate is provided with a scale along the length of the slide rail.

[0014] Preferably, the upper horizontal plate is fixedly connected to an extension plate, which is arranged perpendicularly to the upper horizontal plate for contact with the profile of the building curtain wall unit.

[0015] Preferably, the eccentric adjuster is used to drive the drawing system to move along the slide rail, and the eccentric adjuster adopts a screw-slider mechanism, a gear and rack mechanism or an electric fine-tuning mechanism.

[0016] Preferably, the pulling system adopts a modified gantry-type pulling device, including a gantry support frame, a loading unit, a force measuring unit, a pulling fixture, and a control unit.

[0017] The portal frame is connected to the eccentric adjuster;

[0018] The base of the loading unit is fixed to the portal frame;

[0019] The force measuring unit is connected in series on the loading path of the loading unit;

[0020] The pull-out clamp is connected to the force measuring unit and is used to connect the profile of the building curtain wall unit to be tested;

[0021] The control unit is electrically connected to the force measuring unit and is used for data acquisition and processing.

[0022] Preferably, the loading unit is an electric lead screw, a hydraulic cylinder, or a manual screw loading device; the force measuring unit is a high-precision tension / compression sensor; and the pull-out clamp is connected to the profile of the building curtain wall unit to be tested by adhesive or mechanical clamping.

[0023] A method for on-site testing of structural adhesives for building curtain walls, employing the aforementioned pull-out device, includes the following steps:

[0024] Take a building curtain wall unit and cut it horizontally along the profile and structural adhesive to form a test section with a preset length, and two connecting sections on both sides of the test section.

[0025] Place the cut building curtain wall unit on the work platform, press the vertical part of the angle steel against the edge of the panel, and adjust the height of the vertical plate so that the extension plates on the two upper horizontal plates abut against the upper surface of the profile of the corresponding connecting section.

[0026] The theoretical position of the loading axis is calculated based on the curtain wall design details. The loading axis is adjusted to the theoretical position by adjusting the eccentric adjuster to slide along the slide rail.

[0027] Start the pulling system to apply tension and record the ultimate pulling force F.

[0028] Preferably, when the eccentric adjuster slides along the slide rail, its position is adjusted with reference to the scale on the upper horizontal plate.

[0029] The present invention has the following advantages and effects compared with the prior art:

[0030] (1) The present invention enables the pulling system to slide along the slide rail by cooperating with the working platform and the eccentric adjuster, so as to achieve precise alignment between the pulling force axis and the centroid of the structural adhesive, avoid additional torsional load caused by eccentric loading, ensure that the test data truly reflects the actual tensile performance of the structural adhesive, and solve the problem of inaccurate structural adhesive strength test results in the prior art.

[0031] (2) The present invention fixes the pulling system through the working platform. When loading, the reaction force is transmitted to the connecting section profiles on both sides of the detection section through the portal support frame, eccentric adjuster, working platform and extension plate to form a closed force flow loop, realize the self-balance of reaction force, and solve the problem of poor safety caused by the unarmed support of the detection personnel.

[0032] (3) The height of the vertical plate of the C-shaped steel block of the present invention is adjustable, which can adapt to the height of building curtain wall profiles of different specifications; the eccentric adjuster can be adjusted laterally along the slide rail, which can adapt to profiles of different widths and structural adhesives of different positions, and has strong versatility.

[0033] (4) The present invention increases the contact area with the building curtain wall unit by setting an extension plate. When working, it abuts against the upper surface of the connecting section profile, dispersing the pressure to a larger contact area and effectively reducing the damage and deformation to the profile.

[0034] (5) The method of the present invention forms the detection section and the connection section by cutting, calculates the theoretical position of the loading axis according to the curtain wall design detail drawing, and then accurately centers it by sliding the eccentric adjuster along the slide rail to ensure that the pull-out force axis coincides with the centroid of the structural adhesive, avoids eccentric load, and makes the detection results true and reliable. By using the scale reference and the eccentric adjuster to slide, the loading can be completed in one centering, without the need for repeated trial pulls and adjustments, and the detection efficiency is high. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the pulling device of the present invention.

[0036] Figure 2 This is a schematic diagram of the overall structure of the pulling device of the present invention from another perspective.

[0037] Figure 3 This is a structural schematic diagram of the building curtain wall unit in Example 2.

[0038] Figure 4 This is a schematic diagram of the drawing system of the present invention.

[0039] Figure 5 This is a schematic diagram of the structure of the first workpiece of the present invention.

[0040] Figure 6 This is a schematic diagram of the structure of the second workpiece of the present invention.

[0041] Among them, 1-panel, 2-structural adhesive, 3-profile, 3-1 detection section, 3-2 connecting section; first workpiece-101, 1021-upper horizontal plate, 1022-vertical plate, 1023-lower horizontal plate, 1024-angle steel, 1025-slide rail, 1026-extension plate; 201-gantry support frame, 202-loading unit, 203-force measuring unit, 204-pull-out clamp. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0043] Example 1

[0044] I. Overall Structure of the Device

[0045] like Figure 1-6 As shown, the present invention provides a pull-out device for on-site testing of structural adhesive for building curtain walls, comprising a central adjustment system and a pull-out system.

[0046] The central adjustment system is used to fix the building curtain wall panels and adjust the loading position of the pull-out device, ensuring that its pull-out force axis is located at the centroid of the structural adhesive. It includes a work platform and an eccentric adjuster. The work platform includes a first workpiece and a second workpiece. The first workpiece is a high-strength steel plate, serving as the structural base of the entire mechanism. Figure 5 As shown. The second workpiece consists of an angle steel and two C-shaped steel blocks. The bottom surface of the angle steel has bolt holes, which are used to fix it to the first workpiece. The angle steel serves as a positioning reference. During inspection, the vertical part of the angle steel is aligned with the edge of the building curtain wall panel to ensure accurate positioning of the work platform.

[0047] Each C-shaped steel block is the core adjusting component of this embodiment. Each C-shaped steel block includes an upper horizontal plate, a vertical plate, and a lower horizontal plate, which are connected sequentially to form an overall C shape. Triangular support blocks are welded to the right-angle connections between the C-shaped steel block and the upper and lower horizontal plates to improve bending stiffness. The lower horizontal plate is fixed to the horizontal portion of the angle steel with bolts. Slide rails are provided along the length of both upper horizontal plates for mounting eccentric adjusters. A scale is provided along the length of the slide rails on the upper horizontal plates for adjusting the lateral position of the loading point of the pulling device relative to the left and right edges of the profile. Figure 1 , 2 As shown, an extension plate is fixedly connected to the bottom of the upper horizontal plate, and the extension plate is set perpendicularly to the upper horizontal plate. During operation, the lower surface of the extension plate abuts against the upper surface of the profile, distributing the pressure during the drawing process to a larger contact area. By increasing the stress area, the deformation of the profile is reduced, and the stability during the drawing process is increased.

[0048] In this embodiment, the upper horizontal plate, the vertical plate, and the lower horizontal plate adopt an integral molding structure made of high-strength steel to ensure overall rigidity.

[0049] The pulling system is slidably connected to the slide rail via an eccentric adjuster. The pulling system employs a modified gantry-type structure, including a gantry support frame, a loading unit, a force measuring unit, a pulling clamp, and a control unit. The gantry support frame comprises two support columns (left and right) and a crossbeam fixedly connected to the tops of the two support columns. The bottoms of the two support columns are respectively fixed to the moving parts of the corresponding eccentric adjusters. The entire gantry support frame is made of high-strength steel, possessing sufficient rigidity and stability.

[0050] II. Vertical plate structure of C-shaped steel blocks

[0051] To achieve the height adjustment function of the vertical panel and adapt to the profiles of building curtain walls of different heights, the vertical panel can adopt one of the following four structures, including a sliding structure, a threaded structure, a multi-section telescopic sleeve structure, or a pin structure, as detailed below:

[0052] Sliding structure: such as Figure 6 As shown, the vertical plate includes an outer sleeve and an inner sliding column. The upper end of the inner sliding column is connected to the upper horizontal plate, and the lower end is connected to the lower horizontal plate. The inner sliding column is slidably fitted inside the outer sleeve, and a locking bolt is provided on the side wall of the outer sleeve. When the locking bolt is loosened, the outer sleeve can slide up and down along the inner sliding column, thereby adjusting the height of the upper horizontal plate; when the locking bolt is tightened, its end abuts against the inner sliding column, locking the height position. This structure is simple, reliable, and easy to adjust, suitable for rapid on-site adjustment.

[0053] Threaded structure: The vertical plate includes an inner sliding post and an outer sleeve that are threaded together. The upper end of the inner sliding post is connected to the upper horizontal plate, and the lower end is connected to the lower horizontal plate. By rotating the inner sliding post, the height of the vertical plate can be precisely adjusted. This structure is suitable for detection scenarios that require precise height control.

[0054] The structure features a multi-section telescopic sleeve; the vertical plate consists of three sleeve sections, with the uppermost section fixedly connected to the upper horizontal plate, the lowermost section fixedly connected to the lower horizontal plate, and the middle section being telescopic. A locking mechanism is installed between each sleeve section, using a push-button latch to lock the height. During use, the sleeve is stretched or compressed to the desired height, and the latch automatically locks. This structure offers a wide adjustment range, suitable for rapid switching between curtain wall profiles of various heights.

[0055] Pin-type structure: The vertical plate includes an outer sleeve and an inner sliding column. The upper end of the inner sliding column is connected to the upper horizontal plate, and the lower end is connected to the lower horizontal plate. Multiple positioning holes are correspondingly formed on the inner sliding column and the outer sleeve, with a fixed spacing between adjacent positioning holes. By inserting the positioning pin into the positioning holes at different positions, the height can be quickly adjusted and locked. This structure provides reliable positioning and is suitable for scenarios requiring fixed-position adjustment.

[0056] III. Eccentric Adjuster

[0057] The eccentric adjuster is mounted on the slide rail of the upper horizontal plate and is used to drive the pulling system to move along the slide rail, achieving precise adjustment of the lateral loading position. Depending on the actual requirements, the eccentric adjuster can adopt the following three structural forms:

[0058] Screw-slider mechanism: This includes a screw, a slider, and a handwheel. The slider is slidably mounted on a slide rail, the screw and slider are threaded together, and the handwheel is fixedly connected to the screw. Rotating the handwheel drives the screw to move the slider precisely along the slide rail. The drawing system is fixedly mounted on the slider and moves with it. This structure offers high adjustment precision and requires minimal effort to operate.

[0059] Rack and pinion mechanism: Includes a rack, gear, and handwheel. The rack is fixedly mounted on the upper horizontal plate, parallel to the slide rail. The gear meshes with the rack and is mounted on a movable base. When the handwheel is rotated, the gear rolls along the rack, driving the movable base to move along the slide rail. The pulling system is fixedly mounted on the movable base. This structure has high transmission efficiency and fast adjustment speed.

[0060] The electric fine-tuning mechanism includes a stepper motor, a precision lead screw, a linear guide, and a slider. The stepper motor drives the lead screw to rotate, causing the slider to move precisely along the linear guide. The bottom of the gantry support frame of the drawing system is fixed to the slider and moves with it along the guide rail. The control unit can precisely control the rotation angle of the stepper motor, achieving micron-level lateral displacement adjustment. This structure is suitable for detection scenarios requiring automated control and extremely high alignment accuracy.

[0061] IV. Pulling System

[0062] like Figure 4 As shown, the loading unit is the main power mechanism of the pull-out system, used to apply axial tensile force to the structural adhesive joint. The loading unit can be an electric lead screw, hydraulic cylinder, or manual screw loading device; the specific selection depends on the testing accuracy and site conditions. The base of the loading unit is fixed to the crossbeam of the portal frame.

[0063] like Figure 1-2 As shown, during inspection, the building curtain wall units, consisting of the cut middle inspection section and the connecting sections on both sides, are placed on the work platform. The vertical part of the angle steel abuts against the edge of the panel, achieving accurate positioning of the work platform and the curtain wall unit. The height of the vertical plate of the C-shaped steel block is adjusted so that the extension plates on the two upper horizontal plates abut parallel to the upper surface of the profiles of the left and right connecting sections, providing stable support for the connecting sections.

[0064] The pull-out clamp is connected to the profile of the intermediate testing section. When the loading unit is activated to apply tension, the tension acts on the profile of the testing section through the pull-out clamp, and is then transferred to the structural adhesive. Simultaneously, the reaction force is transmitted sequentially through the portal frame and eccentric adjuster to the working platform, and then through the extension plate to the connecting section profile, forming a closed force flow loop. This design ensures that the reaction force generated during loading is borne by the connecting section, eliminating the need for manual support by operators, achieving self-balancing of the reaction force, and ensuring a constant loading direction with no displacement.

[0065] A force measuring unit is used to acquire the pull-out force applied to the structural adhesive during loading in real time. This force measuring unit is connected in series along the loading path of the loading device, with the upper end of the sensor connected to the output end of the loading unit and the lower end connected to the pull-out clamp. Preferably, a high-precision tensile / compressive sensor with a digital output interface is used, linked with the control unit to achieve continuous monitoring and recording of the force value. The sensor's range and accuracy should meet the tensile strength range and detection error requirements of the structural adhesive.

[0066] The pull-out clamp connects to the force measuring unit and is used to connect the profile of the building curtain wall unit to be tested. The pull-out clamp can be connected to the profile of the building curtain wall unit to be tested by adhesive or mechanical clamping.

[0067] The control unit is electrically connected to the force measuring unit and integrates data acquisition, processing, display and storage functions. It can record the pull-out force and displacement curve in real time for subsequent data analysis and qualification judgment. It can be equipped with a touch screen, human-machine interface, or connected to external data analysis software through an industrial computer.

[0068] Example 2

[0069] This invention provides a method for on-site testing of structural adhesives for building curtain walls, employing the pull-out device described in Example 1, and comprising the following steps:

[0070] S1. Cutting Preparation: Take a section of the building curtain wall unit and cut it to form an independent inspection section: such as... Figure 3 As shown, the profile and structural adhesive are cut horizontally along the building curtain wall unit profile, from top to bottom. A predetermined length of building curtain wall unit is formed between the two cut surfaces as a test section. The building curtain wall units on the left and right sides of the test section are connecting sections, used to abut against the extension plate during subsequent installation. According to relevant standards, the cutting length should be (50±5) mm. In this embodiment, the predetermined length is 50 mm. Variations in the cutting length will affect the bonding area. This device can adapt to different cutting lengths and can be selected according to actual needs. Care should be taken to control the cutting depth during cutting to ensure that the structural adhesive is cut but the panel is not damaged.

[0071] S2. Device Positioning: Place the cut building curtain wall unit (including the inspection section and connecting section) on the work platform, such as... Figure 1-2 As shown. During placement, ensure the profile portion of the building curtain wall unit is stably placed on the work platform. Since the work platform only supports one end of the profile and panel, the other end of the panel is suspended. To balance the height and prevent the panel from tilting or experiencing uneven stress due to its own weight, place a steel plate at the same height as the first workpiece on the work platform under the other end of the panel, ensuring the entire building curtain wall unit remains horizontal and stable. Then, place the vertical part of the angle steel against the lower edge of the panel and profile of the building curtain wall unit to ensure the work platform and the building curtain wall unit are correctly positioned.

[0072] S3. Height Adjustment: Adjust the height of the vertical plates of the C-shaped steel blocks according to the actual height of the building curtain wall. The adjustment method will vary depending on the selected vertical plate structure. After adjustment, ensure that the upper horizontal plate is at a suitable height and that the extension plate is parallel to and abuts against the upper surface of the connecting section profile.

[0073] S4. Align the centroid of the structural adhesive: Calculate the theoretical position of the loading axis based on the curtain wall design details. Specifically, the theoretical position of the loading axis is the centroid position of the structural adhesive in the test section. The cross-section of the structural adhesive in the test section is rectangular, and its centroid is located at the geometric center of the rectangle. Using the edge of the profile as a reference, determine the lateral position of the centroid relative to the edge of the profile based on the curtain wall design details. By sliding the eccentric adjuster along the slide rail and referring to the scale on the upper horizontal plate, precisely adjust the loading axis of the pulling system to this theoretical position.

[0074] S5. Calculation of target pull-out force: If a standard specifies the pull-out strength or design pull-out strength, calculate the target pull-out force F according to the formula. t =Aσ d , where σ d The standard specifies the pull-out strength or design pull-out strength, where A is the bonding area between the structural adhesive of the test section and the building curtain wall panel; the target pull-out force is used as the threshold for determining the termination of loading.

[0075] S6. Loading Test: Start the loading unit and apply axial tensile force at a constant rate. The force measuring unit monitors the tensile force value in real time, and the control unit synchronously records the pull-out force-displacement curve. There are two conditions for terminating the loading: if the tensile force reaches F... t If the structural adhesive does not fail, loading is terminated; if the structural adhesive fails prematurely, loading is terminated. Record the ultimate pull-out force F upon termination of loading. In the first case, F = F0. t In the second case, F is the tensile force at the moment of failure.

[0076] S7. Tensile Stress Calculation: Calculate the tensile stress σ using the formula σ=F / A. Compare the tensile stress σ with the standard specified pull-out strength σ. d Comparison, if σ≥σ d If the bonding performance is satisfactory, the structural adhesive is deemed to be qualified; otherwise, it is deemed unqualified.

[0077] S8. Repair and Restoration: After the test, the cut area is repaired using silicone structural adhesive with a strength and elastic modulus higher than that of the tested sample. Simultaneously, a pressure plate longer than 100mm is installed at the cut area and fixed to the profile with screws to enhance the strength of the repaired area. After the reinforcement and repair are completed, the building curtain wall unit is reinstalled in its original position.

[0078] Example 3

[0079] The difference between this embodiment and Embodiment 2 is that there is no standard specifying the pull-out strength or design pull-out strength. Therefore, the target pull-out force calculation in step S5 is not performed. In step S6, the adhesive is directly applied until the structural adhesive fails, and the tensile force F at the moment of failure is recorded. In step S7, the tensile stress σ = F / A is calculated. This σ is the actual tensile strength of the structural adhesive, which can be used to evaluate its bonding performance or for archiving.

[0080] The above embodiments are preferred embodiments of the present invention and are not intended to limit the present invention. Any changes or other equivalent substitutions made without departing from the technical solution of the present invention are included within the protection scope of the present invention.

Claims

1. A pull-out device for on-site testing of structural adhesive in building curtain walls, characterized in that, Including the central adjustment system and the pulling system, The central adjustment system includes a working platform and an eccentric adjuster. The working platform includes a first workpiece and a second workpiece fixedly connected to the first workpiece. The second workpiece includes an angle steel and two C-shaped steel blocks. The angle steel is fixedly connected to the first workpiece. The C-shaped steel blocks include an upper horizontal plate, a vertical plate, and a lower horizontal plate connected sequentially. The lower horizontal plate is fixedly connected to the angle steel. The height of the vertical plate is adjustable. The upper horizontal plate is provided with a slide rail along its length. The eccentric adjuster is installed on the slide rail. The drawing system is slidably connected to the slide rail through the eccentric adjuster.

2. The pull-out device for on-site testing of structural adhesive for building curtain walls according to claim 1, characterized in that, The vertical plate adopts any of the following structures: The vertical plate includes an outer sleeve and an inner sliding column. The upper end of the inner sliding column is connected to the upper horizontal plate and the lower end is connected to the lower horizontal plate. The inner sliding column is slidably fitted inside the outer sleeve. The outer sleeve is provided with a locking bolt. When tightened, the end of the locking bolt abuts against the inner sliding column to lock the height. The vertical plate includes an inner sliding post and an outer sleeve that are threaded together. The upper end of the inner sliding post is connected to the upper horizontal plate, and the lower end is connected to the lower horizontal plate. The vertical plate is a multi-section telescopic sleeve structure; The vertical plate includes an outer sleeve and an inner sliding column. The upper end of the inner sliding column is connected to the upper horizontal plate and the lower end is connected to the lower horizontal plate. The inner sliding column and the outer sleeve are provided with a plurality of positioning holes, and positioning pins are provided in the positioning holes for pluggability.

3. The pull-out device for on-site testing of structural adhesive for building curtain walls according to claim 1, characterized in that, The upper horizontal plate is equipped with a scale along the length of the slide rail.

4. A pull-out device for on-site testing of structural adhesive for building curtain walls according to claim 1, characterized in that, An extension plate is fixedly connected to the upper horizontal plate. The extension plate is perpendicularly intersecting the upper horizontal plate and is used to abut against the profile of the building curtain wall unit.

5. A pull-out device for on-site testing of structural adhesive for building curtain walls according to claim 1, characterized in that, The eccentric adjuster is used to drive the drawing system to move along the slide rail. The eccentric adjuster adopts a screw-slider mechanism, a gear and rack mechanism, or an electric fine-tuning mechanism.

6. A pull-out device for on-site testing of structural adhesive for building curtain walls according to claim 1, characterized in that, The pulling system adopts a modified gantry-type pulling device, including a gantry support frame, a loading unit, a force measuring unit, a pulling fixture, and a control unit. The portal frame is connected to the eccentric adjuster; The base of the loading unit is fixed to the portal frame; The force measuring unit is connected in series on the loading path of the loading unit; The pull-out clamp is connected to the force measuring unit and is used to connect the profile of the building curtain wall unit to be tested; The control unit is electrically connected to the force measuring unit and is used for data acquisition and processing.

7. A pull-out device for on-site testing of structural adhesive for building curtain walls according to claim 6, characterized in that, The loading unit is an electric lead screw, hydraulic cylinder, or manual screw loading device; the force measuring unit is a high-precision tension / compression sensor; the pull-out clamp is connected to the profile of the building curtain wall unit to be tested by adhesive or mechanical clamping.

8. A method for on-site testing of structural adhesive for building curtain walls, employing the pull-out device as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Take a building curtain wall unit and cut it horizontally along the profile and structural adhesive to form a test section with a preset length, and two connecting sections on both sides of the test section. Place the cut building curtain wall unit on the work platform, press the vertical part of the angle steel against the edge of the panel, and adjust the height of the vertical plate so that the extension plates on the two upper horizontal plates abut against the upper surface of the profile of the corresponding connecting section. The theoretical position of the loading axis is calculated based on the curtain wall design details. The loading axis is adjusted to the theoretical position by adjusting the eccentric adjuster to slide along the slide rail. Start the pulling system to apply tension and record the ultimate pulling force F.

9. A method for on-site testing of structural adhesives for building curtain walls according to claim 8, characterized in that, When the eccentric adjuster slides along the slide rail, it adjusts its position by referring to the scale on the upper horizontal plate.

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