A carton compression strength detection device

Abstract

The application discloses a carton compression strength detection device, which comprises a fixed support bottom plate, a sliding support bearing frame is arranged on the top of the fixed support bottom plate, a detection table assembly is arranged on the top of the fixed support bottom plate at one end of the inner side of the sliding support bearing frame, a test pressure counterweight assembly is arranged on the top of the fixed support bottom plate at the other end, a lifting moving assembly is connected to the top of the sliding support bearing frame in a sliding mode along the transverse direction, a linear transmission mechanism is arranged between the lifting moving assembly and the sliding support bearing frame, and a control device is arranged on one side of the sliding support bearing frame in a transverse direction. The application has the beneficial effects that the application can realize high-precision quantitative pressure on the carton, can maintain constant pressure, can truly simulate the warehouse stacking working condition, can accurately position and fix the carton, can realize real-time monitoring of deformation through a multi-angle visual unit, and can greatly improve the detection accuracy and work efficiency.

Description

Technical Field

[0001] This invention relates to the field of cardboard box testing technology, specifically to a cardboard box compression strength testing device. Background Technology

[0002] Cardboard boxes are the most widely used packaging products. Depending on the materials used, there are corrugated cardboard boxes, single-layer cardboard boxes, and various specifications and models. Three-layer and five-layer cardboard boxes are commonly used, while seven-layer boxes are less common. Each layer consists of linerboard, corrugated paper, core paper, and face paper. Linerboard and face paper can be made of kraft paper or corrugated cardboard, while the core paper is made of corrugated paper. The color and feel of different types of paper vary, and the paper produced by different manufacturers also differs in color and feel. Cardboard boxes undergo a compression test during production and use to effectively determine the maximum pressure the box can withstand, ensuring product quality.

[0003] Chinese patent CN215374882U discloses a carton compression testing machine. It uses a cylinder to drive a telescopic rod to press down, which in turn drives a pressure plate to press down. During this process, a compression testing platform tests the carton's compression strength. If the carton cannot withstand the pressure and breaks, the fragments are contained by a barrier formed by baffles and left and right upright plates, preventing them from scattering. However, the testing machine in this patent uses a cylinder to drive the telescopic rod to press down the pressure plate, making precise control of the applied pressure difficult. Furthermore, lifting and driving components such as cylinders, hydraulic cylinders, electric telescopic rods, and servo cylinders stop working once the pressure plate reaches a certain level, making it impossible to maintain pressure (i.e., continuously and stably apply a specified amount of pressure). In this situation, if the carton deforms slightly during the test, the pressure it experiences will change, affecting the accuracy of the test results. Additionally, it cannot monitor the deformation of the carton during compression testing in real time, requiring further development and improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a cardboard box compression strength testing device to solve the problems of existing cardboard box compression strength testing devices, such as difficulty in accurately controlling the pressure, inability to achieve stable pressure holding, and inability to monitor cardboard box deformation in real time, resulting in insufficient accuracy of the test results.

[0005] The present invention achieves the above-mentioned objective through the following technical solution: a carton compression strength testing device, comprising a fixed support base plate, a sliding support frame disposed on the top of the fixed support base plate, a testing platform assembly disposed on the top of the fixed support base plate at one end of the inner lateral side of the sliding support frame, a test pressure counterweight assembly disposed on the top of the fixed support base plate at the other end, a lifting and moving assembly slidably connected to the top of the sliding support frame along the lateral side, a linear transmission mechanism disposed between the lifting and moving assembly and the sliding support frame, and a control device disposed on one lateral side of the sliding support frame.

[0006] Furthermore, the detection platform assembly includes a U-shaped fixed support plate disposed on the top of the fixed support base plate. A support detection platform is fixedly disposed between the inner surfaces of the U-shaped fixed support plate. A wind box is disposed at the bottom of the support detection platform. A plurality of negative pressure adsorption holes communicating with the interior of the wind box are arrayed on the top of the support detection platform. A vacuum pump is disposed on the outer surface of the lateral side of the U-shaped fixed support plate. The suction end of the vacuum pump is connected to the interior of the wind box. A lifting support mounting frame is slidably connected vertically between the inner surfaces of the lateral sides of the U-shaped fixed support plate above the support detection platform. A first lifting device is disposed between the bottom of the lateral end of the lifting support mounting frame and the top of the fixed support base plate. Visual inspection units are installed on both the inner surfaces of the lateral sides and the inner surfaces of the longitudinal sides of the lifting support mounting frame. Telescopic devices are disposed on both the outer surfaces of the lateral side and the outer surfaces of the longitudinal side of the U-shaped fixed support plate between the support detection platform and the lifting support mounting frame. A positioning plate is installed inside the U-shaped fixed support plate at one end of the telescopic device. The positioning plate is provided with first guide plug-in rods on both sides of the telescopic device. The first guide plug-in rods are plugged into the U-shaped fixed support plate. A positioning frame is slidably connected between the inner surfaces of the two sides of the U-shaped fixed support plate above the lifting support mounting frame in the vertical direction. The U-shaped fixed support plate has a rectangular hollow hole on the side corresponding to the position of the positioning frame. A fixed support bearing plate is provided on the outer surface of the U-shaped fixed support plate below the rectangular hollow hole. A lifting support connecting plate is provided in the rectangular hollow hole. A second lifting device is provided between the fixed support bearing plate and the lifting support connecting plate. One end of the lifting support connecting plate is connected to the outer surface of the side of the positioning frame. Guide rollers are provided at the top of the inner surfaces of the two sides of the positioning frame in the horizontal direction and the inner surfaces of the two sides in the vertical direction. The endpoint of the outer surface of the inner circumference of the guide roller is located on the same plane as the inner surface of the positioning frame below.

[0007] Furthermore, a protective baffle made of transparent material is hinged to one end of the U-shaped fixed support plate, and a locking buckle is provided at the end of the protective baffle away from the hinged end.

[0008] Furthermore, the U-shaped fixed support plate and the fixed support base plate, the U-shaped fixed support plate and the support testing platform, and the fixed support base plate and the sliding support bearing frame are all fixedly connected by welding.

[0009] Furthermore, the visual inspection unit includes an industrial camera, a supplementary light source, and an image processing module. The industrial camera is positioned to shoot towards the side wall of the carton under test, and is used to acquire images of the carton's outline during the compression process in real time.

[0010] Furthermore, the test pressure counterweight assembly includes a first U-shaped support plate whose bottom ends are connected to the top of the fixed support base plate. A U-shaped support mounting bracket is provided on the side of the first U-shaped support plate that is laterally away from the test platform assembly, and a centrifugal duct fan is provided on the other side. A pressure sensor is provided on the top of the first U-shaped support plate, and a lifting support plate is provided above the pressure sensor. Second guide rods are provided at each of the four bottom corners of the lifting support plate, and the second guide rods are plugged into the first U-shaped support plate. A second U-shaped support plate is provided on the top of the lifting support plate, and a positioning drying frame is provided on the top of the second U-shaped support plate. The positioning drying frame has two lateral sides... The inner surface and both longitudinal inner surfaces have downward-sloping guide slopes. A pressure test chamber is placed inside the positioning drying frame. The positioning drying frame has an air duct inside. Several air outlets connected to the air duct are equidistantly arranged on the guide slope of the positioning drying frame. The output end of the centrifugal duct fan is connected to the air duct. The pressure test chamber is a hollow cubic structure. Lifting protrusions are provided at both longitudinal ends of the top of the pressure test chamber. The top of the lifting protrusions has a lifting insertion groove. A water inlet is provided at the end of the top of the pressure test chamber that is laterally away from the test platform assembly. A rotary bearing is provided at the top of the U-shaped support mounting bracket. The outer ring of the rotary bearing is connected to the U-shaped support mounting bracket, and the inner ring is provided with a rotary connecting pipe. A first transmission gear is mounted on the rotary connecting pipe above the U-shaped support mounting frame. A rotary motor is mounted on the bottom of the U-shaped support mounting frame, located on one side of the rotary connecting pipe. A second transmission gear is mounted on the top output end of the rotary motor, extending above the U-shaped support mounting frame. The first and second transmission gears mesh with each other. A bidirectional water pump is mounted on the side of the U-shaped support mounting frame laterally away from the first U-shaped support bearing plate. A water tank is mounted on the longitudinal side of the U-shaped support mounting frame. A Z-shaped connecting pipe is mounted on the U-shaped support mounting frame. One end of the Z-shaped connecting pipe is connected to one end of the bidirectional water pump, and the other end is mounted with a rotary joint. The other end of the rotary joint is connected to one bottom end of the rotary connecting pipe. The other end of the bidirectional water pump is connected to the water storage tank. A digital flow meter is installed on the Z-shaped connecting pipe. An L-shaped connecting pipe is installed above the rotary connecting pipe. A lower support mounting plate and an upper support mounting plate are respectively installed on the outer circumference of the rotary connecting pipe above the first transmission gear plate and the outer circumference of the L-shaped connecting pipe. A connecting hose is installed between the rotary connecting pipe and the L-shaped connecting pipe. The other end of the L-shaped connecting pipe is connected to a vertically installed insertion pipe. A third lifting device is installed between the lower support mounting plate and the upper support mounting plate on one side of the connecting hose. A guide plug-in plate is installed on the top of the lower support mounting plate on the other side of the connecting hose. The guide plug-in plate is plugged into the upper support mounting plate.

[0011] Furthermore, the bottom longitudinal ends of the second U-shaped support bearing plate are connected to the top longitudinal ends of the lifting support bearing plate, and the top of the lifting support bearing plate on the inner side of the second U-shaped support bearing plate has a slope that slopes downward in the horizontal direction. The top of the first U-shaped support bearing plate on the lowest side of the slope has a water collection box.

[0012] Furthermore, the rotary connecting pipe, the Z-shaped connecting pipe, the L-shaped connecting pipe, and the insertion pipe are all galvanized pipes, and the connecting hose is a spiral-shaped rubber hose. One end of the connecting hose is connected to the top end of the rotary connecting pipe, and the other end is connected to the bottom end of the L-shaped connecting pipe. A baffle is provided between the connecting hose and the third lifting device. The bottom of the baffle is connected to the lower support mounting plate, and the baffle is inserted into the upper support mounting plate.

[0013] Furthermore, several drying air boxes are equidistantly arranged in the transverse direction between the inner surfaces of the two longitudinal sides of the second U-shaped support bearing plate. Each drying air box has several drying air outlets that are connected to its interior in an equidistant array. The interior of each drying air box is connected to the output end of the centrifugal duct fan.

[0014] Furthermore, the lifting and moving assembly includes a movable support mounting plate slidably connected to the top of the sliding support carrier. A linear transmission mechanism is provided between the movable support mounting plate and the sliding support carrier. The linear transmission mechanism is a transmission structure in which a drive motor is equipped with a transmission gear and a transmission rack meshing. A lifting support plate is provided below the movable support mounting plate, and an electric hoist is provided on the top of the movable support mounting plate. The lifting end of the electric hoist's sling passes through the movable support mounting plate and connects to the top of the lifting support plate. A third guide plug-in rod is provided on both sides of the top of the lifting support plate at the electric hoist. The third guide plug-in rod is plugged into the movable support mounting plate. Electromagnets are provided at the bottom of the lifting support plate at the longitudinal position corresponding to the lifting plug-in slot. The cross-sectional shape of the electromagnet matches the cross-sectional shape of the lifting plug-in slot so that the electromagnet and the lifting plug-in slot can be plugged into each other.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The test pressure counterweight assembly of this invention uses a self-weight water injection pressurization test box as the pressure carrier. With the help of a pressure sensor to collect the total weight of the counterweight in real time, and the water injection volume is precisely controlled by a bidirectional water pump, high-precision quantitative control of the pressure applied to the carton can be achieved, which solves the problem of low pressure control accuracy of traditional cylinder, electric cylinder and other drive-type pressure application mechanisms. More importantly, the pressure test chamber relies on its own weight to continuously act on the top of the carton. Even when the carton is slightly deformed under pressure, the pressure will not decrease. It truly achieves long-term, constant pressure holding test, and can more realistically simulate the long-term pressure state of the carton under actual working conditions such as warehouse stacking, which greatly improves the authenticity and reliability of the test results. Meanwhile, by setting up a positioning drying frame with an air outlet and a drying air box structure, water droplets that accidentally drip from the side surface of the pressure test chamber after water injection and pumping operations can be dried quickly. This avoids water droplet residue from changing the self-weight accuracy of the pressure test chamber, and also prevents water droplets from dripping and wetting the test carton during the pressurization process, thus affecting the test results. In addition, a pipeline lifting and rotating mechanism consisting of a lifting device, a transmission gear plate, and a connecting hose is adopted. When water needs to be injected or pumped into the pressure test chamber, the insertion pipe can be automatically driven to rotate and descend precisely through the water inlet to enter the pressure test chamber. After completing the task, it automatically rises and rotates to avoid obstruction. This not only ensures a stable connection of the pipeline during counterweight operation, but also completely avoids mechanical interference of the pipeline with the subsequent lifting and moving components for transporting the pressure test chamber.

[0016] 2. In the testing platform assembly of the present invention, the positioning plate is driven by the telescopic device to complete the center alignment and pre-positioning of the carton, and then the negative pressure adsorption hole forms a negative pressure to fix the bottom of the carton, which can effectively prevent the carton from shifting or sliding during the testing process, ensure the consistency of the pressure bearing position, and improve the repeatability and accuracy of the test data. Meanwhile, during the testing phase, the lifting support mounting frame descends to the preset testing position under the drive of the first lifting device. Through multiple sets of vision acquisition units set on it, the outer contour image of the carton side wall is acquired in real time and dynamically from multiple angles without contacting the carton. After the test is completed, the mounting frame can rise and reset, without affecting the carton picking and putting operation. When the pressure test chamber is hoisted to the testing station and lowered, the guide rollers on the positioning frame guide it to slide smoothly into the frame. The positioning frame restrains the pressure test chamber throughout the testing process, ensuring that the pressure is applied evenly and vertically to the carton in the vertical direction, ensuring that the center of pressure is accurately aligned with the center of the carton, and preventing the pressure test chamber from tipping over or shifting during the pressure application process, thus improving the stability and safety of the pressure application operation.

[0017] 3. The present invention uses an electric hoist for lifting and a linear transmission mechanism for lateral movement in the lifting and moving component, which can smoothly and efficiently complete the automatic transfer of the pressure test box between the counterweight station and the testing station, replacing manual handling operations, reducing the labor intensity of operators, and improving the efficiency of testing operations. Meanwhile, the positioning and drying frame of the counterweight station and the positioning frame of the testing station are matched to ensure that the pressure test chamber is accurately positioned within the station. This allows for automatic alignment of the electromagnet and the lifting insertion slot without the need for manual calibration, thus improving the adaptability and smoothness of the automated operation of the device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the detection stage assembly in this invention; Figure 3 This is a three-dimensional structural schematic diagram of the detection stage assembly in this invention from another perspective; Figure 4 This is a front view of the detection stage assembly in this invention; Figure 5 This is a three-dimensional structural diagram of the test pressure counterweight component in this invention; Figure 6 for Figure 5 Enlarged view of section A in the middle; Figure 7 This is a front view of a partial structure of the test pressure counterweight assembly in this invention; Figure 8 This is a three-dimensional structural diagram of a partially cut-out positioning drying frame in the test pressure counterweight assembly of the present invention; Figure 9 This is a three-dimensional structural diagram of the lifting and moving component in this invention.

[0019] In the diagram: 1-Fixed support base plate, 2-Sliding support bearing frame, 3-Testing table assembly, 4-Test pressure counterweight assembly, 5-Lifting and moving assembly, 6-Linear transmission mechanism, 7-Control device; 301-U-shaped fixed support plate, 302-support testing platform, 303-air box, 304-negative pressure adsorption hole, 305-vacuum pump, 306-lifting support mounting frame, 307-first lifting device, 308-visual inspection unit, 309-telescopic device, 310-positioning plate, 311-first guide plug rod, 312-positioning frame, 313-rectangular hollow hole, 314-fixed support bearing plate, 315-lifting support connecting plate, 316-second lifting device, 317-guide roller; 401-First U-shaped support plate, 402-U-shaped support mounting bracket, 403-Pressure sensor, 404-Lifting support plate, 405-Second guide connector rod, 406-Second U-shaped support plate, 407-Positioning drying frame, 408-Pressure test chamber, 409-Air duct, 410-Air outlet, 411-Lifting protrusion, 412-Lifting connector slot, 413-Water inlet, 414-Rotating connecting pipe, 415-First transmission gear plate, 416-Rotary motor, 417-Second transmission gear plate, 418-Two-way water pump, 419-Water storage tank, 420-Z-type connecting pipe, 421-Rotary joint, 422-Digital flow meter, 423-L-type connecting pipe, 424-Lower support mounting plate, 425-Upper support mounting plate, 426-Connecting hose, 427-Insertion pipe, 428-Third lifting device, 429-Guide plug plate; 501-Mobile support mounting plate, 502-Lifting support lifting plate, 503-Electric hoist, 504-Third guide plug rod, 505-Electromagnet. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Combination Figure 1 The device for testing the compressive strength of a carton includes a fixed support base plate 1, a sliding support carrier 2 on the top of the fixed support base plate 1, a testing platform assembly 3 on the top of the fixed support base plate 1 at one end of the inner side of the sliding support carrier 2, a test pressure counterweight assembly 4 on the top of the fixed support base plate 1 at the other end, a lifting and moving assembly 5 slidably connected to the top of the sliding support carrier 2 along the lateral direction, a linear transmission mechanism 6 between the lifting and moving assembly 5 and the sliding support carrier 2, and a control device 7 on one side of the sliding support carrier 2.

[0023] like Figures 2 to 4As shown, the inspection platform assembly 3 includes a U-shaped fixed support plate 301 mounted on top of the fixed support base plate 1. A support inspection platform 302 is fixedly mounted between the inner surfaces of the U-shaped fixed support plate 301. A bellows 303 is mounted at the bottom of the support inspection platform 302. Several negative pressure adsorption holes 304 communicating with the inside of the bellows 303 are arrayed on the top of the support inspection platform 302. A vacuum pump 305 is mounted on the outer surface of one side of the U-shaped fixed support plate 301. The suction end of the vacuum pump 305 is connected to the inside of the bellows 303. A lifting support mounting frame 306 is slidably connected vertically between the inner surfaces of the two sides of the U-shaped fixed support plate 301 above the support inspection platform 302. A first lifting device 307 is mounted between the bottom of one side of the lifting support mounting frame 306 and the top of the fixed support base plate 1. Visual inspection units 308 are mounted on both the inner surfaces of the two sides of the lifting support mounting frame 306 and the inner surfaces of the two sides of the vertical direction. During the inspection stage, the lifting support mounting frame 306 is connected to the first lifting device 307. The 7-axis drive descends to the preset inspection station. Multiple sets of visual inspection units 308 on the station acquire real-time, dynamic images of the carton's sidewalls from multiple angles without contacting the carton. After testing, the lifting support frame 306 can rise and reset, completely unaffected by the carton's loading and unloading operations. Telescopic devices 309 are installed on both the horizontal and vertical outer surfaces of the U-shaped fixed support plate 301 between the support inspection platform 302 and the lifting support frame 306. One end of the telescopic device 309 extends into the inner side of the U-shaped fixed support plate 301 and is fitted with a positioning plate 310. First guide rods 311 are installed on both sides of the positioning plate 310, connecting to the U-shaped fixed support plate 301. The telescopic device 309 drives the positioning plate 310 to pre-align the carton's center. Negative pressure is then applied to the bottom of the carton through the negative pressure adsorption holes 304, effectively preventing displacement and slippage of the carton during inspection.A positioning frame 312 is slidably connected vertically between the inner surfaces of the two sides of the U-shaped fixed support plate 301 above the lifting support mounting frame 306. The U-shaped fixed support plate 301 has a rectangular perforated hole 313 on one side corresponding to the positioning frame 312. A fixed support bearing plate 314 is provided on the outer surface of the U-shaped fixed support plate 301 below the rectangular perforated hole 313. A lifting support connecting plate 315 is provided inside the rectangular perforated hole 313. A second lifting device 316 is provided between the fixed support bearing plate 314 and the lifting support connecting plate 315. One end of the lifting support connecting plate 315 is connected to the outer surface of the one side of the positioning frame 312. Next, guide rollers 317 are provided at the top of the inner surfaces of both the horizontal and vertical sides of the positioning frame 312. The endpoints of the outer surfaces of the inner circumferences of the guide rollers 317 are on the same plane as the inner surface of the positioning frame 312 below. When the pressure test box 408 is hoisted to the testing station and lowered, the guide rollers 317 on the positioning frame 312 can guide it to slide smoothly into the frame. The positioning frame 312 constrains the pressure test box 408 throughout the testing process, ensuring that the pressure is applied evenly and vertically to the carton in the vertical direction, ensuring that the center of pressure is precisely aligned with the center of the carton, and preventing the pressure test box 408 from tipping over or shifting during the pressure application process.

[0024] like Figures 5 to 8As shown, the test pressure counterweight assembly 4 includes a first U-shaped support plate 401 whose bottom ends are connected to the top of the fixed support base plate 1. A U-shaped support mounting bracket 402 is provided on the side of the first U-shaped support plate 401 furthest from the test platform assembly 3, and a centrifugal duct fan is provided on the other side. A pressure sensor 403 is provided on the top of the first U-shaped support plate 401. A lifting support plate 404 is provided above the pressure sensor 403. Second guide rods 405 are provided at the four corners of the bottom of the lifting support plate 404, and the second guide rods 405 are plugged into the first U-shaped support plate 401. A second U-shaped support plate 406 is provided on the top of the lifting support plate 404. A positioning drying frame 407 is provided on the top of the second U-shaped support plate 406. The inner surfaces of the positioning drying frame 407 on both the lateral and longitudinal sides have downward-sloping guide surfaces. A pressure measuring device is placed inside the positioning drying frame 407. The test chamber 408 uses a self-weight water-filled pressure test chamber 408 as the pressure carrier. With the pressure sensor 403 collecting the total weight of the counterweight in real time and the bidirectional water pump 418 precisely controlling the water injection volume, it can achieve high-precision quantitative control of the pressure applied to the carton. The pressure test chamber 408 relies on its own weight to continuously act on the carton. Even when the carton is slightly deformed under pressure, the pressure will not decrease, truly realizing long-term, constant pressure holding test, which is used to simulate the long-term pressure state of the carton under actual working conditions such as warehouse stacking. The positioning drying frame 407 has an air duct 409 inside. Several air outlets 410 connected to the air duct 409 are equidistantly arranged on the guide slope of the positioning drying frame 407. The output end of the centrifugal duct fan is connected to the air duct 409. By setting the positioning drying frame 407 with air outlets 410 and the air duct 409 structure, water droplets accidentally dripping from the side surface of the pressure test chamber 408 after water injection and pumping operations can be quickly dried.The pressure test chamber 408 is a hollow cubic structure. Lifting protrusions 411 are provided at both longitudinal ends of the top of the pressure test chamber 408. Each lifting protrusion 411 has a lifting insertion groove 412 at its top. The lifting protrusions 411 are made of ferromagnetic material. A water inlet 413 is provided at the end of the top of the pressure test chamber 408 furthest from the test bench assembly 3. A rotary bearing is provided at the top of the U-shaped support mounting bracket 402. The outer ring of the rotary bearing is connected to the U-shaped support mounting bracket 402, and the inner ring is provided with a rotary connecting pipe 414. A first transmission gear 415 is provided above the U-shaped support mounting bracket 402. A rotary motor 416 is installed at the bottom of the rotary connecting pipe 414. The top output end of the rotary motor 416 extends above the U-shaped support mounting bracket 402 and is fitted with a second transmission gear 417. The first transmission gear 415 meshes with the second transmission gear 417. A bidirectional water pump 418 is installed on the side of the U-shaped support mounting bracket 402 furthest from the first U-shaped support bearing plate 401. A water storage tank 419 is installed on the longitudinal side of the U-shaped support mounting bracket 402. A Z-shaped connecting pipe 420 is installed on the U-shaped support mounting bracket 402. One end of the Z-shaped connecting pipe 420 is connected to one end of the bidirectional water pump 418, and the other end is fitted with a rotary joint 421. The other end of the 21 is connected to one end of the bottom of the rotary connecting pipe 414, and the other end of the bidirectional water pump 418 is connected to the water storage tank 419. A digital flow meter 422 is installed on the Z-shaped connecting pipe 420. An L-shaped connecting pipe 423 is installed above the rotary connecting pipe 414. The outer circumference of the rotary connecting pipe 414 above the first transmission gear plate 415 and the outer circumference of the L-shaped connecting pipe 423 are respectively provided with a lower support mounting plate 424 and an upper support mounting plate 425. A connecting hose 426 is provided between the rotary connecting pipe 414 and the L-shaped connecting pipe 423. The other end of the L-shaped connecting pipe 423 is connected to a vertically installed insertion pipe 427. One side of the connecting hose 426 A third lifting device 428 is provided between the lower support mounting plate 424 and the upper support mounting plate 425. A guide plug plate 429 is provided on the top of the lower support mounting plate 424 on the other side of the connecting hose 426. The guide plug plate 429 is plugged into the upper support mounting plate 425. A pipeline lifting and rotating mechanism composed of the third lifting device 428, the first transmission gear plate 415, the second transmission gear plate 417, and the connecting hose 426 is adopted. When it is necessary to inject or pump water into the pressure test chamber 408, the insertion pipe 427 can be automatically driven to rotate and descend, and accurately enter the pressure test chamber 408 through the water inlet 413. After completing the task, it automatically rises and rotates to avoid obstruction.

[0025] like Figure 9As shown, the lifting and moving assembly 5 includes a movable support mounting plate 501 slidably connected to the top of the sliding support carrier 2. A linear transmission mechanism 6 is provided between the movable support mounting plate 501 and the sliding support carrier 2. The linear transmission mechanism 6 is a transmission structure in which a drive motor is equipped with a transmission gear and a transmission rack meshing. A lifting support lifting plate 502 is provided below the movable support mounting plate 501. An electric hoist 503 is provided at the top of the movable support mounting plate 501. The lifting end of the sling of the electric hoist 503 passes through the movable support mounting plate 501 and connects to the top of the lifting support lifting plate 502. The top of the lifting plate 502 is provided with third guide plug-in rods 504 on both sides of the electric hoist 503. The third guide plug-in rods 504 are plugged into the movable support mounting plate 501. Through the lifting drive of the electric hoist 503 and the lateral drive of the linear transmission mechanism 6, the automatic transfer of the pressure test box 408 between the counterweight station and the testing station is completed. At the bottom of the lifting support lifting plate 502, corresponding to the longitudinal position of the lifting plug-in groove 412, electromagnets 505 are provided. The cross-sectional shape of the electromagnets 505 matches the cross-sectional shape of the lifting plug-in groove 412 so that the electromagnets 505 and the lifting plug-in groove 412 can be plugged into each other.

[0026] A transparent protective baffle is hinged to one end of the U-shaped fixed support plate 301. A locking buckle is located at the end of the protective baffle away from the hinge. During testing, the baffle is closed and locked in place by the locking buckle, forming a physical barrier when the carton breaks under pressure and debris flies out, effectively preventing debris from injuring operators and ensuring personal safety during testing. Simultaneously, the transparent material allows real-time observation of the internal testing status without opening the baffle. The hinged opening and closing mechanism facilitates the handling of the carton under test, and the locking buckle prevents accidental opening of the baffle during testing, balancing testing safety and operational convenience. The U-shaped fixed support plate 301 is fixedly connected to the fixed support base plate 1, the U-shaped fixed support plate 301 to the support testing table 302, and the fixed support base plate 1 to the sliding support carrier 2 by welding, ensuring the overall structural rigidity and integrity of the device, improving safety and service life. The vision inspection unit 308 includes an industrial phase... The system includes a camera, a supplementary light source, and an image processing module. The industrial camera's shooting direction is towards the side wall of the carton under test, used to acquire real-time images of the carton's shape contour during the compression process. This allows for non-contact, real-time acquisition of the side wall shape contour images of the carton during the entire compression process under uniform illumination provided by the supplementary light source. The image processing module then analyzes and calculates the carton's deformation, deformation distribution, and morphological characteristics at the moment of rupture. The accommodating space formed by the vertical inner surfaces of the positioning frame 312 and the positioning drying frame 407 matches the contour formed by the vertical outer surface of the pressure test chamber 408. This ensures that the pressure test chamber 408 can accurately fall into the positioning drying frame 407 during the counterweight stage and be precisely guided into the positioning frame 312 during the testing stage. Furthermore, the accommodating space formed by the vertical inner surfaces of the positioning frame 312 and the positioning drying frame 407 is located in the same longitudinal position as the contour formed by the vertical outer surface of the pressure test chamber 408.

[0027] The bottom longitudinal ends of the second U-shaped support plate 406 are connected to the top longitudinal ends of the lifting support plate 404. The top of the lifting support plate 404 on the inner side of the second U-shaped support plate 406 has a slope that slopes downwards laterally. The top of the first U-shaped support plate 401 on the lowest side of the slope has a water collection box. The top of the second U-shaped support plate 406 is arranged with several drainage holes inside the positioning drying frame 407. The inner surfaces of the two longitudinal sides of the second U-shaped support plate 406 are connected along... Several drying air boxes are arranged horizontally at equal intervals. Each drying air box has several drying air outlets that are connected to its interior. The interior of each drying air box is connected to the output end of a centrifugal duct fan. Together with the air outlets 410 on the guide slope of the positioning drying frame 407, multi-directional synchronous drying is achieved, quickly removing residual water droplets from the surface of the pressure test chamber 408. This avoids the residual water from increasing the weight of the pressure test chamber 408 and affecting the accuracy of the pressure counterweight, and also prevents water droplets from seeping into the pressure test chamber 408 after it is transported to the testing station. The wet test carton ensures the accuracy of the pressure test results; the rotary connecting pipe 414, Z-type connecting pipe 420, L-type connecting pipe 423, and insertion pipe 427 are all galvanized pipes, which can effectively improve the rust prevention and corrosion resistance of the water supply pipeline and extend the service life of the pipeline; the connecting hose 426 is a spiral rubber hose, one end of which is connected to the top end of the rotary connecting pipe 414, and the other end is connected to the bottom end of the L-type connecting pipe 423. The spiral rubber hose design of the connecting hose 426 gives it a wide range of flexibility and bending freedom, which can perfectly adapt to the positional changes caused by the lifting and rotating motion of the insertion pipe 427 driven by the third lifting device 428; a baffle is set between the connecting hose 426 and the third lifting device 428. The bottom of the baffle is connected to the lower support mounting plate 424, and the baffle is plugged into the upper support mounting plate 425, which physically isolates the hose from the moving components, prevents the hose from tangling or friction damage, thereby extending the service life of the pipeline system and ensuring smooth water supply process of the counterweight. A spring-pressed one-way valve is installed at the water inlet 413. When there is no external force, the return spring presses against the valve core, and the sealing gasket tightly blocks the water inlet 413. The insertion tube moves downward and uses the downward pressure to open the valve core, allowing the insertion tube 427 to extend into the pressure test chamber 408 to complete the water injection or pumping operation. When the insertion tube is pulled out, the spring instantly resets and re-seals the water inlet.

[0028] In addition, the drive motor, vacuum pump 305, first lifting device 307, vision inspection unit 308, telescopic device 309, second lifting device 316, pressure sensor 403, centrifugal duct fan, rotary motor 416, bidirectional water pump 418, digital flow meter 422, third lifting device 428, electric hoist 503, and electromagnet 505 in the linear transmission mechanism 6 are all electrically connected to the control device 7. The first lifting device 307, telescopic device 309, second lifting device 316, and third lifting device 428 are one of electric telescopic rods, servo electric cylinders, or hydraulic cylinders. The drive motor and rotary motor 416 in the linear transmission mechanism 6 are both servo motors, and the bidirectional water pump 418 is a bidirectional gear pump.

[0029] Working principle: During the testing process, the carton to be tested is first placed in the center of the support testing platform. The two sets of telescopic devices are controlled to move the positioning plate and align the center of the carton. Then, the vacuum pump is started, and negative pressure adsorption force is formed at the bottom of the carton through the air box and the negative pressure adsorption holes of the platform array, adsorbing the carton onto the testing platform. Next, the first lifting device drives the lifting support installation frame to descend vertically to the preset testing position, so that the visual inspection units around the frame are aligned with the side wall of the carton. At the same time, the transparent protective baffle on the side of the U-shaped fixed support plate is closed and locked by the locking buckle.

[0030] Meanwhile, the pressure sensor at the counterweight station collects the initial weight of the pressurization test chamber in real time and feeds it back to the control device. When the pressure counterweight needs to be adjusted, the rotary motor starts, and through the meshing of the second and first transmission gears, it drives the rotary connecting pipe to rotate around its own axis, causing the insertion pipe to rotate to directly above the water inlet at the top of the pressurization test chamber. Then, the third lifting device drives the upper support mounting plate to descend vertically along the guide insertion plate, the connecting hose is stretched and extended, and the insertion pipe descends accordingly, opening the one-way valve at the water inlet and extending into the pressurization test chamber. The bidirectional water pump starts in the forward direction, injecting water from the storage tank into the pressurization test chamber through the Z-shaped connecting pipe, rotary joint, rotary connecting pipe, connecting hose, L-shaped connecting pipe, and insertion pipe. During the water injection process, the digital flow meter monitors the output in real time. The water flow and pressure sensors synchronously collect the total weight of the pressurized test chamber. When the total weight reaches the preset pressure value, the bidirectional water pump stops filling the chamber. If the counterweight needs to be reduced, the bidirectional water pump reverses to pump water until the total weight reaches the standard. When the counterweight reaches the preset value, the bidirectional water pump stops immediately, achieving high-precision quantitative counterweight. After the water filling is completed, the third lifting device retracts, driving the insertion tube to rise and be pulled out. The one-way valve at the water inlet automatically resets and closes under the action of the spring. The rotary motor rotates in the reverse direction, driving the insertion tube to rotate to the side avoidance position. Then, the centrifugal pipeline fan starts, and the airflow is sent into the air duct and drying box inside the positioning drying frame in two directions. The airflow is blown from the air outlet on the guide slope and the drying air outlet at multiple angles to the outer surface of the pressurized test chamber, quickly drying the water droplets remaining on the outer surface of the pressurized test chamber during the water filling process.

[0031] After the counterweighting and air-drying processes are completed, the linear transmission mechanism drives the moving support mounting plate to move laterally along the sliding support bearing frame to directly above the counterweight station. The electric hoist lowers the lifting support lifting plate, so that the two sets of electromagnets at the bottom are precisely inserted into the lifting insertion slots of the lifting protrusions. The electromagnets are energized to generate magnetic force to complete the attraction. The electric hoist lifts the pressure test box away from the positioning air-drying frame. Then, the linear transmission mechanism drives the lifting moving component to move laterally to the testing station. The electric hoist slowly lowers the pressure test box. The guide roller at the top of the positioning frame guides the falling pressure test box, allowing it to enter the positioning frame smoothly and be evenly pressed vertically onto the top of the carton to be tested. The electromagnets are de-energized and released, and the electric hoist drives the lifting support lifting plate to rise slightly to a safe height to avoid interference with the pressure application process. During the test, the second lifting device can adjust the height of the positioning frame through the lifting support connecting plate, so that the positioning frame constrains the pressure test box throughout the process, ensuring that the pressure is applied vertically in the vertical direction and that the center of pressure is precisely aligned with the center of the carton, preventing the pressure test box from tipping over.

[0032] During the pressure application phase, the pressure test chamber applies constant pressure to the cardboard box based on its own weight. Even if the cardboard box undergoes slight deformation under pressure, the pressure value will not decrease, achieving long-term stable pressure holding and realistically simulating the long-term pressure conditions of cardboard box storage and stacking. During the pressure holding process, multiple sets of visual detection units on the lifting support mounting frame, with the assistance of supplementary lighting, non-contactly and in real-time acquire images of the cardboard box's sidewall contours from multiple angles around the box. The image processing module analyzes and calculates the cardboard box's deformation, deformation rate, and deformation distribution pattern, and the data is synchronously transmitted to the control device for recording. When the cardboard box ruptures or reaches the preset pressure holding time, the system automatically records the corresponding pressure parameters and deformation data, completing the compressive strength test.

[0033] After the test, the lifting and moving component descends again, the electromagnet attracts the pressure test chamber and lifts it back to the counterweight position, where it falls back into the positioning drying frame; the vacuum pump stops running, the negative pressure adsorption is released, the telescopic device drives the positioning plate to retract and reset, and the tested carton can be taken out; the above process can be repeated to continuously test the next carton; after all tests are completed, the bidirectional water pump runs in reverse to pump the water in the pressure test chamber back to the storage tank, and all moving parts are reset to their initial state, waiting for the next test operation.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cardboard box compression strength testing device, comprising a fixed support base plate (1), characterized in that: The fixed support base plate (1) is provided with a sliding support carrier (2) on top. The fixed support base plate (1) at one end of the inner side of the sliding support carrier (2) is provided with a test table assembly (3), and the fixed support base plate (1) at the other end is provided with a test pressure counterweight assembly (4). The sliding support carrier (2) is slidably connected to a lifting and moving assembly (5) along the lateral direction. A linear transmission mechanism (6) is provided between the lifting and moving assembly (5) and the sliding support carrier (2). A control device (7) is provided on one side of the sliding support carrier (2).

2. The cardboard box compression strength testing device according to claim 1, characterized in that: The testing platform assembly (3) includes a U-shaped fixed support plate (301) disposed on the top of the fixed support base plate (1). A testing platform (302) is fixedly disposed between the inner surfaces of the U-shaped fixed support plate (301). A bellows (303) is disposed at the bottom of the testing platform (302). A plurality of negative pressure adsorption holes (304) communicating with the inside of the bellows (303) are arranged in an array on the top of the testing platform (302). A vacuum pump (305) is disposed on the outer surface of the lateral side of the U-shaped fixed support plate (301). The suction end of the vacuum pump (305) is connected to the inside of the bellows (303). The testing platform (302) is located above the testing platform (302). A lifting support mounting frame (306) is slidably connected vertically between the inner surfaces of the two sides of the U-shaped fixed support plate (301). A first lifting device (307) is provided between the bottom of the bottom of the horizontal end of the lifting support mounting frame (306) and the top of the fixed support base plate (1). Visual inspection units (308) are installed on both the inner surfaces of the horizontal and vertical sides of the lifting support mounting frame (306). Telescopic devices (309) are provided on both the outer surface of the horizontal side and the outer surface of the vertical side of the U-shaped fixed support plate (301) between the support inspection platform (302) and the lifting support mounting frame (306). One end of the telescopic device (309) A positioning plate (310) is installed inside the U-shaped fixed support plate (301). The positioning plate (310) has first guide rods (311) on both sides of the telescopic device (309). The first guide rods (311) are plugged into the U-shaped fixed support plate (301). A positioning frame (312) is slidably connected between the inner surfaces of the two sides of the U-shaped fixed support plate (301) above the lifting support mounting frame (306) in the vertical direction. The U-shaped fixed support plate (301) has a rectangular perforated hole (313) on one side corresponding to the position of the positioning frame (312). Below the rectangular perforated hole (313)... A fixed support bearing plate (314) is provided on the outer surface of the U-shaped fixed support plate (301). A lifting support connecting plate (315) is provided in the rectangular hollow hole (313). A second lifting device (316) is provided between the fixed support bearing plate (314) and the lifting support connecting plate (315). One end of the lifting support connecting plate (315) is connected to the outer surface of the horizontal side of the positioning frame (312). Guide rollers (317) are provided at the top of the inner surfaces of the horizontal sides and the inner surfaces of the vertical sides of the positioning frame (312). The endpoint of the outer surface of the inner circumference of the guide roller (317) is located on the same plane as the inner surface of the positioning frame (312) below.

3. The cardboard box compression strength testing device according to claim 2, characterized in that: A protective baffle made of transparent material is hinged to one end of the U-shaped fixed support plate (301), and a locking buckle is provided at the end of the protective baffle away from the hinge end.

4. The cardboard box compression strength testing device according to claim 2, characterized in that: The U-shaped fixed support plate (301) and the fixed support base plate (1), the U-shaped fixed support plate (301) and the support testing platform (302), and the fixed support base plate (1) and the sliding support bearing frame (2) are all fixedly connected by welding.

5. The cardboard box compression strength testing device according to claim 2, characterized in that: The visual inspection unit (308) includes an industrial camera, a supplementary light source, and an image processing module. The industrial camera is directed towards the side wall of the carton to be tested, and is used to collect images of the carton's outline during the compression process in real time.

6. The cardboard box compression strength testing device according to claim 1, characterized in that: The test pressure counterweight assembly (4) includes a first U-shaped support plate (401) whose bottom ends are connected to the top of the fixed support base plate (1). A U-shaped support mounting bracket (402) is provided on the side of the first U-shaped support plate (401) that is laterally away from the test bench assembly (3), and a centrifugal duct fan is provided on the other side. A pressure sensor (403) is provided on the top of the first U-shaped support plate (401), and a lifting support plate (404) is provided above the pressure sensor (403). A second guide plug-in rod (405) is provided at each of the four bottom corners of the lifting support plate (404). The second guide plug-in rod (405) is plugged into and connected to the first U-shaped support plate (401). A second U-shaped support plate (406) is provided on the top of the lifting support bearing plate (404), and a positioning drying frame (407) is provided on the top of the second U-shaped support bearing plate (406). The inner surfaces of the positioning drying frame (407) on both the horizontal and vertical sides have downward inclined guide slopes. A pressure test chamber (408) is placed inside the positioning drying frame (407). The positioning drying frame (407) has an air duct (409) inside. Several air outlets (410) connected to the air duct (409) are equidistantly arranged on the guide slope of the positioning drying frame (407). The output end of the centrifugal duct fan is connected to the air duct (409). The pressure test chamber (408) is a hollow cubic structure. The pressure test chamber (408) has lifting protrusions (411) at both longitudinal ends on its top. The top of each lifting protrusion (411) has a lifting insertion groove (412). A water inlet (413) is provided at the end of the top of the pressure test chamber (408) that is laterally away from the test platform assembly (3). A rotary bearing is provided on the top of the U-shaped support mounting frame (402). The outer ring of the rotary bearing is connected to the U-shaped support mounting frame (402), and a rotary connecting pipe (414) is provided on the inner ring. A first transmission gear plate (415) is provided above the U-shaped support mounting frame (402) on the rotary connecting pipe (414). The bottom of the U-shaped support mounting frame (402) is located on one side of the rotary connecting pipe (414). A rotary motor (416) is provided, and the top output end of the rotary motor (416) extends to the top of the U-shaped support mounting frame (402) and a second transmission gear plate (417) is installed thereon. The first transmission gear plate (415) meshes with the second transmission gear plate (417). A bidirectional water pump (418) is provided on the side of the U-shaped support mounting frame (402) that is laterally away from the first U-shaped support bearing plate (401). A water storage tank (419) is provided on the longitudinal side of the U-shaped support mounting frame (402). A Z-shaped connecting pipe (420) is provided on the U-shaped support mounting frame (402). One end of the Z-shaped connecting pipe (420) is connected to one end of the bidirectional water pump (418), and the other end is equipped with a rotary joint (421).The other end of the rotary joint (421) is connected to one end of the bottom of the rotary connecting pipe (414), and the other end of the bidirectional water pump (418) is connected to the water storage tank (419). A digital flow meter (422) is installed on the Z-shaped connecting pipe (420). An L-shaped connecting pipe (423) is installed above the rotary connecting pipe (414). A lower support mounting plate (424) and an upper support mounting plate (425) are respectively installed on the outer circumference of the rotary connecting pipe (414) above the first transmission gear plate (415) and the outer circumference of the L-shaped connecting pipe (423). A connecting hose (426) is provided between the rotating connecting pipe (414) and the L-shaped connecting pipe (423). The other end of the L-shaped connecting pipe (423) is connected to a vertically arranged insertion pipe (427). A third lifting device (428) is provided between the lower support mounting plate (424) and the upper support mounting plate (425) on one side of the connecting hose (426). A guide insertion plate (429) is provided on the top of the lower support mounting plate (424) on the other side of the connecting hose (426), and the guide insertion plate (429) is inserted into the upper support mounting plate (425).

7. The cardboard box compression strength testing device according to claim 6, characterized in that: The bottom longitudinal ends of the second U-shaped support bearing plate (406) are connected to the top longitudinal ends of the lifting support bearing plate (404). The top of the lifting support bearing plate (404) on the inner side of the second U-shaped support bearing plate (406) has a slope that slopes downward in the horizontal direction. The top of the first U-shaped support bearing plate (401) on the lowest side of the slope has a water collection box.

8. The cardboard box compression strength testing device according to claim 6, characterized in that: The rotary connecting pipe (414), the Z-shaped connecting pipe (420), the L-shaped connecting pipe (423), and the insertion pipe (427) are all galvanized pipes. The connecting hose (426) is a spiral rubber hose. One end of the connecting hose (426) is connected to the top end of the rotary connecting pipe (414), and the other end is connected to the bottom end of the L-shaped connecting pipe (423). A baffle is provided between the connecting hose (426) and the third lifting device (428). The bottom of the baffle is connected to the lower support mounting plate (424), and the baffle is inserted into the upper support mounting plate (425).

9. A cardboard box compression strength testing device according to claim 6, characterized in that: The second U-shaped support bearing plate (406) has several drying air boxes arranged at equal intervals along the transverse direction between the inner surfaces on both sides. The drying air boxes are arranged in an equal array with several drying air outlets connected to their interiors. The interior of the drying air box is connected to the output end of the centrifugal duct fan.

10. A cardboard box compression strength testing device according to claim 6, characterized in that: The lifting and moving assembly (5) includes a movable support mounting plate (501) slidably connected to the top of the sliding support carrier (2). A linear transmission mechanism (6) is provided between the movable support mounting plate (501) and the sliding support carrier (2). The linear transmission mechanism (6) is a transmission structure in which a drive motor is equipped with a transmission gear and a transmission rack meshing. A lifting support lifting plate (502) is provided below the movable support mounting plate (501). An electric hoist (503) is provided on the top of the movable support mounting plate (501). The lifting end of the sling of the electric hoist (503) passes through the movable support mounting plate (502). 01) Connected to the top of the lifting support lifting plate (502), the top of the lifting support lifting plate (502) is provided with a third guide plug rod (504) on both sides of the electric hoist (503), the third guide plug rod (504) is plugged into the movable support mounting plate (501), and an electromagnet (505) is provided at the bottom of the lifting support lifting plate (502) at the longitudinal position corresponding to the lifting plug groove (412). The cross-sectional shape of the electromagnet (505) matches the cross-sectional shape of the lifting plug groove (412) so that the electromagnet (505) can be plugged into the lifting plug groove (412).

Images