Corrugated carton strength testing device and method

Abstract

The invention discloses a corrugated carton strength testing device and method.The corrugated carton strength testing device comprises a testing table for containing a corrugated carton, a base is arranged at the bottom of the testing table, a control panel is installed on one side of the base, a support is installed above the testing table, an air cylinder is installed on a top plate of the support, a supporting rod is arranged below the top plate, and a guide sleeve is fixedly arranged on the supporting rod; a steering wheel is fixedly arranged at the top of the guide rod, the top of the steering wheel abuts against the output end of the air cylinder, and the bottom of the guide rod is fixedly connected with a gland mechanism; according to the device, the corrugated cartons of multiple sizes can be rapidly switched and adjusted to be detected, and peripheral limiting plates do not need to be adjusted; and the limiting plate prevents additional constraining force from being generated on the corrugated carton, the natural deformation process of the corrugated carton cannot be interfered, and the checking error is small.

Description

Technical Field

[0001] The invention relates to the technical field of detection devices, and in particular to a corrugated box strength testing device and method. Background Art

[0002] Corrugated boxes have been widely used in the packaging and transportation of various products due to their good cushioning performance, high compressive strength, and economic and environmental protection. As one of the most important transportation packaging materials, the annual output of corrugated boxes has reached tens of billions of square meters, and it occupies more than 80% of the packaging market share in the fields of electronic products, household appliances, food, and medicine. Corrugated boxes provide excellent compressive strength and cushioning protection through their multi-layer corrugated structure, and also have significant advantages such as light weight, low cost, and recyclability. In practical applications, its strength performance is directly related to the safety of goods during transportation. Especially in the context of the rapid development of modern logistics, goods are often subjected to complex external forces during transportation, warehousing, and loading and unloading, which puts higher requirements on the compressive strength of corrugated boxes. According to the provisions of the International Organization for Standardization (ISO) and national packaging standards, corrugated boxes must have sufficient compressive strength to ensure the safety of the items inside, so it is of great practical significance to conduct standardized and normalized strength tests on corrugated boxes.

[0003] Chinese patent document (publication number: CN112378771A) discloses a corrugated paper box load-bearing detection device, including an upper pressure driving hydraulic mechanism and a load-bearing clamping control mechanism, and the bottom end of the upper pressure driving hydraulic mechanism is movably connected to the load-bearing clamping control mechanism. The device can use the fixing piece connected to the inner side of the telescopic piston push rod to drive the movable clamping plate to slide backward on the guide rail, and the main movable rotating rod and the auxiliary movable rotating rod connected to the movable clamping plate and the fixing piece respectively drive the pressure plate body to descend synchronously, and use the pressure detection plate to pressurize and load-bearing test the corrugated paper box, and transmit the detection data to the display screen in real time, and when testing cartons of different categories and load-bearing strengths, it can also first pull the plate body upward and place the counterweight block on the weighing sensor to measure its mass, and then perform load-bearing test on the lower carton together with the pressure plate body, so as to avoid the pressure of the pressure plate body not reaching the load-bearing extreme value of some cartons, thereby improving the application range of the device and being more accurate than manual detection.

[0004] In the process of transporting goods, corrugated boxes will be subjected to vibration during transportation, and corrugated boxes are mostly stacked, which will bear the lateral stress and vertical compression deformation caused by vibration; When testing the load-bearing capacity of corrugated boxes, it is necessary to frequently adjust the position of the surrounding limit plates when testing multiple sizes, which has low work efficiency and is not conducive to the testing of large quantities of boxes. The top plate used to test and fix the corrugated boxes is too large, which wastes materials and easily causes bumps, is not conducive to operation, and affects efficiency. When testing, the limit plates around the corrugated boxes are too large to block the line of sight. If the limit plates are too large, they will also interfere with the natural deformation process of the corrugated boxes. It will produce additional restraint force on the corrugated box, making it difficult to truly reflect the process of the corrugated box being subjected to lateral stress and vertical compression deformation, resulting in large detection errors. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a corrugated cardboard box strength testing device and method, which can quickly switch and adjust to detect corrugated cardboard boxes of multiple sizes without adjusting the surrounding limit plates, and the work is efficient; the contact area of ​​the limit plates is small, which avoids additional restraining force on the corrugated cardboard box, will not interfere with the natural deformation process of the corrugated cardboard box, and the inspection error is small.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: A corrugated box strength testing device comprises a test bench for placing the corrugated box, a base is arranged at the bottom of the test bench, a control panel is installed on one side of the base, a bracket is installed above the test bench, a cylinder is installed on the top plate of the bracket, a support rod is arranged below the top plate, a guide sleeve is fixed on the support rod, a guide rod is movably arranged inside the guide sleeve, a steering wheel is fixed on the top of the guide rod, the top of the steering wheel abuts against the output end of the cylinder, and the bottom of the guide rod is fixedly connected to a capping mechanism; the capping mechanism comprises a first capping assembly, a second capping assembly and a third capping assembly, the third capping assembly is connected to the bottom of the support rod through a suspension rod, and the second capping assembly is connected to the bottom of the support rod through a suspension rod. The first cover assembly is sleeved in the third cover assembly, and the first cover assembly is sleeved in the second cover assembly; the guide rod is movably inserted into the second cover assembly and the third cover assembly, and the bottom of the guide rod is fixedly connected to the first cover assembly; under normal circumstances, the first cover assembly, the second cover assembly and the third cover assembly are all in a mutually sleeved state to form a cover body; when the guide rod is screwed to one side, the first cover assembly is separated from the cover body and moves downward, or when the guide rod is screwed to the other side, the second cover assembly is separated from the cover body and moves downward, or the guide rod is lifted upward and then lowered, and the cover body moves downward as a whole and moves to the top of the corrugated paper box.

[0007] Preferably, the third gland assembly is a frame structure, the inner wall of the frame is provided with third gland fixing grooves in an array, and the bottom end of the frame is provided with third gland limiting plates in an array.

[0008] Preferably, the first pressure cover assembly includes a first pressure cover body with a cavity structure, a first pressure cover boss rotatably installed inside the first pressure cover body, the top of the first pressure cover boss is fixedly connected to the bottom of the guide rod, first pressure cover connecting plates are slidably arranged around the first pressure cover boss, the first pressure cover connecting plates are limited by sliding grooves, and a first pressure cover tension spring is arranged on one side of the first pressure cover connecting plate close to the first pressure cover boss; a plurality of first pressure cover limiting units are arranged on the periphery of the first pressure cover body.

[0009] Preferably, the first pressure cover limiting unit includes a first pressure cover limiting plate and a first pressure cover T-slot, the first pressure cover T-slot is located on one side of the first pressure cover body, the T-shaped portion of the first pressure cover limiting plate is connected to the bottom of the first pressure cover T-slot through a first pressure cover limiting tension spring, the limiting portion of the first pressure cover limiting plate slides up and down on the outside of the first pressure cover body, and a first pressure cover reset member is arranged on one side of the first pressure cover T-slot.

[0010] Preferably, the first pressure cover reset member includes a first pressure cover wedge plate, a first pressure cover reset groove and a first pressure cover clamping plate groove are provided on one side of the first pressure cover T-slot, the first pressure cover reset groove and the first pressure cover T-slot are connected, the first pressure cover wedge plate is installed inside the first pressure cover reset groove, the first pressure cover baffle is fixed on the first pressure cover wedge plate, the first pressure cover spring is sleeved on the first pressure cover wedge plate, the other end of the first pressure cover wedge plate is hinged to the first pressure cover clamping plate, the first pressure cover clamping plate supports the first pressure cover limit plate when the first pressure cover clamping plate is in a horizontal position, and is located in the clamping plate groove when the first pressure cover clamping plate is in a vertical state, which is beneficial to the upward reset of the first pressure cover limit plate.

[0011] Preferably, the second pressure cover assembly includes a second pressure cover body with a cavity structure, a second pressure cover boss rotatably installed inside the second pressure cover body, second pressure cover connecting plates are slidably arranged around the second pressure cover boss, the second pressure cover connecting plates are limited by sliding grooves, and a second pressure cover tension spring is arranged on the side of the second pressure cover connecting plate close to the second pressure cover boss; a plurality of second pressure cover limiting units are arranged on the periphery of the second pressure cover body; a through hole is provided in the middle of the second pressure cover body, a column is installed in the through hole, and the top of the column is fixedly connected to the bottom end of the second pressure cover boss to form a swivel; a groove is provided at the bottom of the column, and the first pressure cover assembly is installed in the groove, the guide rod is penetrated through the swivel and fixedly connected to the first pressure cover boss of the first pressure cover assembly; an arc groove is provided on the swivel, and a vertical plate is fixed on the guide rod, and the vertical plate is located inside the arc groove.

[0012] Preferably, the second gland limiting unit includes a second gland limiting plate and a second gland T-slot, the second gland T-slot is located on one side of the second gland body, the T-shaped portion of the second gland limiting plate is connected to the bottom of the second gland T-slot through a second gland limiting tension spring, the limiting portion of the second gland limiting plate slides up and down on the outside of the second gland body, and a second gland reset member is arranged on one side of the second gland T-slot; the second gland reset member includes a second gland wedge plate, and a second gland T-slot is opened on one side of the second gland A gland reset groove and a second gland clamping plate groove, the second gland reset groove and the second gland T-slot are connected, a second gland wedge plate is installed inside the second gland reset groove, a second gland baffle is fixed on the second gland wedge plate, a second gland spring is sleeved on the second gland wedge plate, the other end of the second gland wedge plate is hinged to the second gland clamping plate, when the second gland clamping plate is in a horizontal position, it supports the second gland limit plate, and when the second gland clamping plate is in a vertical state, it is located in the clamping plate groove, which is beneficial to the upward reset of the second gland limit plate.

[0013] Preferably, the suspension rod includes a sleeve and a sleeve rod, the end of the sleeve rod is fixedly connected to the guide rod, a conical platform is fixedly arranged on the top of the guide rod, an inverted conical platform is slidably arranged on the guide rod, a through hole is opened on the sleeve, the through hole is located on the opposite side wall of the sleeve, wedge blocks are slidably installed in the through holes on both sides, a connecting rod is fixedly arranged on the end of the wedge block close to the outer side, and a compression spring is arranged on the connecting rod.

[0014] Preferably, a pressure sensor is provided at the output end of the cylinder for real-time monitoring of the pressure value; a displacement sensor is provided on the support rod for detecting the displacement of the capping mechanism; and both the pressure sensor and the displacement sensor are electrically connected to the control panel.

[0015] The method for testing using a device comprises the following steps: S1. Place the corrugated box to be tested on the test bench and select the corresponding marking line according to the box size for precise positioning; S2. Select a capping assembly with a suitable size for the capping mechanism, including: S21, rotating the steering wheel to one side, so that the guide rod rotates 45 degrees, the first gland assembly is separated from the gland body and moves down to the top of the corrugated paper box, and the first gland limit plate is close to the side wall of the paper box to achieve limit fixation; S22, rotating the steering wheel to the other side, so that the guide rod rotates 45 degrees, the second gland assembly is separated from the gland body and moves down to the top of the corrugated box, and the second gland limit plate is close to the side wall of the box to achieve limit fixation; S23, lifting the guide rod upward to trigger the hook unit of the suspension rod, so that the cover body moves down to the top of the corrugated paper box as a whole, and the third cover limit plate is close to the side wall of the paper box to achieve limit fixation; S3, start the cylinder so that its output end applies pressure to the top of the steering wheel, record the pressure parameters in real time through the pressure sensor on the cylinder, and observe the extrusion deformation of the outer box; S4. According to the settings of the control panel, you can choose: conventional project: the driving parts on both sides reciprocate at the same frequency and direction, acceleration and deceleration project: the driving parts on both sides reciprocate at the same frequency and different directions, bumping project: the telescopic component reciprocates, project superposition: such as the combination of conventional project and bumping project; S5. The displacement of the capping mechanism is detected by the displacement sensor on the support rod, and the strength of the corrugated box is evaluated by combining the pressure and displacement data.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The three components of the first gland assembly, the second gland assembly and the third gland assembly of the test device of the present invention are installed in a detachable nesting manner to form a quickly adjustable gland mechanism, so as to realize accurate unlocking and reconnection between the components; by adjusting the steering wheel to drive the guide rod to rotate 45 degrees to the left or right, or by lifting the guide rod upward, the hook unit in the suspension rod is triggered to be lowered again, so as to realize the quick selection of gland assemblies of different sizes for corrugated paper boxes close to the top of the box body; when the gland assembly is close to the box body, the gland limit plates on the periphery of the gland assembly are close to the side wall of the box body to limit and fix the box body; each gland assembly is provided with a limit unit, in which the wedge plate and the card plate work together to accurately control the extension and contraction of the limit plate, so as to ensure that it can be accurately fixed and released at different detection stages, thereby realizing accurate limiting of the side wall of the corrugated paper box; the gland limit plates are evenly distributed on the upper part of the box body and have a small contact area, so that the additional constraint force on the box body is small, and the natural deformation process of the box body is not interfered with, thereby reducing the error generated by the test equipment and improving the inspection accuracy.

[0017] 2. The detection device of the present invention realizes flexible detection of cartons of multiple sizes through the precise coordination of the first pressure cover assembly, the second pressure cover assembly and the third pressure cover assembly: under normal conditions, the three components are mutually nested to form a pressure cover body with a flat bottom surface, which is convenient for fitting on the top of the box body; the 45-degree rotation design of the guide rod realizes three-size detection modes through precise connection and separation mechanisms: in the first mode, when the guide rod is rotated to one side, the first pressure cover convex disk rotates 45 degrees, and the convex block moves away from the first pressure cover connecting plate. Under the action of the first pressure cover tension spring, the first pressure cover connecting plate retracts into the first pressure cover body to release the connection with the column. The first pressure cover assembly detaches from the pressure cover body and moves downward, and the first pressure cover limit plates on all sides are precisely close to the side walls of the carton; in the second mode, when the guide rod is rotated to the other side, the column and the second pressure cover convex disk are driven to rotate synchronously, and the second pressure cover convex disk rotates 45 degrees to make the convex block move away from the second pressure cover connecting plate. Under the action of the second pressure cover tension spring, the second pressure cover connecting plate The connecting plate retracts into the second pressure cover body, releasing the connection with the third pressure cover assembly, and the second pressure cover assembly detaches from the pressure cover body and moves downward together with the first pressure cover assembly, and the second pressure cover limit plates on all sides are precisely close to the side wall of the carton; in the third mode, the guide rod is lifted upward to trigger the hook unit of the suspension rod, so that the pressure cover body moves downward as a whole, and the third pressure cover limit plate is close to the side wall of the carton; wherein, the precise contact and separation of the connecting plate and the convex disc are achieved by rotating the guide rod 45 degrees, and the auxiliary conversion mechanism of the first pressure cover tension spring and the second pressure cover tension spring, and the hook unit of the suspension rod enhance the stability and rapid positioning capability of the pressure cover mechanism; the device does not require additional clamping components, can quickly and accurately perform load-bearing tests on corrugated cartons of different sizes, and significantly improves the detection efficiency and applicability. The deformation of the carton under different pressures can be monitored in real time through the pressure sensor on the cylinder and the displacement sensor on the support rod, providing objective and accurate data support for the strength evaluation of the carton.

[0018] 3. The suspension rod of the present invention comprises a sleeve, a sleeve rod, a cone-shaped platform, an inverted cone-shaped platform, a wedge block, a connecting rod and a compression spring. When the third gland assembly is required for inspection, the guide rod is lifted upward to drive the first gland assembly, the second gland assembly and the third gland assembly to move upward as a whole, and the sleeve rod, the cone-shaped platform and the inverted cone-shaped platform are driven to move upward synchronously. The top end of the inverted cone-shaped platform squeezes the wedge blocks on both sides back to the inner wall of the sleeve, and the inverted cone-shaped platform moves upward to the top of the wedge block. After the upward external force is released, the inverted cone-shaped platform is on the guide rod under the action of gravity. It slides upward and fits with the conical table, and the side of the guide rod abuts against the wedge and slides down, so that the conical table and the inverted conical table are separated from the limit support of the wedge, and the sleeve rod moves downward, and finally the three pressure cover components are moved down to the top of the corrugated cardboard box as a whole, and the third pressure cover limit plate limits and fixes the side of the box body; the operating process of the detection device is simplified, so that the pressure cover mechanism can move down quickly and accurately for inspection, the operation is simple and efficient, and the pressure cover body can be accurately positioned and fixed automatically, which significantly improves the convenience and accuracy of the corrugated cardboard box load-bearing detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the overall installation structure of the device of the present invention; Figure 2 It is a three-dimensional schematic diagram of the disassembled structure of the capping mechanism of the device of the present invention; Figure 3 It is a three-dimensional schematic diagram of the cross-sectional structure of the first gland assembly of the device of the present invention; Figure 4 It is a three-dimensional schematic diagram of the split structure of the first gland limiting unit of the device of the present invention; Figure 5 It is a three-dimensional schematic diagram of the cross-sectional structure of the second gland assembly of the device of the present invention; Figure 6 It is a three-dimensional schematic diagram of the matching structure between the first gland assembly and the column of the device of the present invention; Figure 7 It is a three-dimensional schematic diagram of the internal connection structure of the suspension rod of the device of the present invention; In the figure: base 11; control panel 12; test bench 13; bracket 14; support rod 15; top plate 16; marking line 17; cylinder 18; guide sleeve 19; steering wheel 20; guide rod 21; suspension rod 22; gland mechanism 23; first gland assembly 24; second gland assembly 25; third gland assembly 26; first gland T-slot 27; first gland limit plate 28; first gland wedge plate 29; first gland connecting plate 30; column 31; groove 32; second gland fixing groove 33; second gland T-slot 34; second gland limit plate 35; second gland connecting plate Plate-36; second pressure cover wedge plate-37; third pressure cover fixing groove-38; third pressure cover limiting plate-39; first pressure cover convex disc-40; first pressure cover tension spring-41; first pressure cover baffle plate-42; first pressure cover hinge seat-43; first pressure cover spring-44; first pressure cover clamping plate-45; first pressure cover reset groove-46; first pressure cover clamping plate groove-47; first pressure cover limiting tension spring-48; through hole-49; second pressure cover convex disc-50; arc groove-51; vertical plate-52; sleeve-53; sleeve rod-54; conical platform-55; inverted conical platform-56; guide rod-57; wedge block-58; connecting rod-59; compression spring-60. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0022] Figure 1-Figure 7 As shown in the figure, a corrugated box strength testing device comprises a test bench 13 for placing a corrugated box, a base 11 is arranged at the bottom of the test bench 13, a control panel 12 is installed on one side of the base 11, a bracket 14 is installed above the test bench 13, a cylinder 18 is installed on the top plate 16 of the bracket 14, a support rod 15 is arranged below the top plate 16, a guide sleeve 19 is fixedly arranged on the support rod 15, a guide rod 21 is movably arranged inside the guide sleeve 19, a steering wheel 20 is fixedly arranged on the top of the guide rod 21, the top end of the steering wheel 20 abuts against the output end of the cylinder 18, and the bottom of the guide rod 21 is fixedly connected to a capping mechanism 23; the capping mechanism 23 comprises a first capping assembly 24, a second capping assembly 25 and a third capping assembly 26, and the third capping assembly 26 is connected to the support via a suspension rod 22. At the bottom of the support rod 15, the second gland assembly 25 is sleeved inside the third gland assembly 26, and the first gland assembly 24 is sleeved inside the second gland assembly 25; the guide rod 21 is movably inserted into the second gland assembly 25 and the third gland assembly 26, and the bottom of the guide rod 21 is fixedly connected to the first gland assembly 24; under normal conditions, the first gland assembly 24, the second gland assembly 25 and the third gland assembly 26 are all in a mutually sleeved state to form a gland body; when the guide rod 21 is screwed to one side, the first gland assembly 24 is separated from the gland body and moves downward, or when the guide rod 21 is screwed to the other side, the second gland assembly 25 is separated from the gland body and moves downward, or the guide rod 21 is lifted upward and then lowered, the gland body moves downward as a whole and moves to the top of the corrugated paper box.

[0023] The device of the present invention is conducive to rapid detection of multiple fixed sizes of corrugated paper boxes, without the need to set up additional clamping components on the side, simplifying the equipment, improving efficiency, and utilizing large-scale detection. A marking line 17 is set on the top of the test table 13, and different marking lines are for different box sizes, which facilitates the rapid positioning of the box to be tested.

[0024] Under normal conditions, when the device is in the preparation state, the first gland assembly 24, the second gland assembly 25 and the third gland assembly 26 are all in a mutually nested state to form a gland body, and the bottom surface of the gland body is a plane, which is convenient for pressing down the top of the box body; The first gland assembly 24 is detachably connected to the column 31 via the first gland connecting plate 30, and the column 31 is rotatably connected to the second gland assembly 25. The second gland assembly 25 is detachably connected to the third gland assembly 26 via the second gland connecting plate 36, thereby finally forming a detachable gland body. The guide rod 21 is inserted into the second gland assembly 25 and the third gland assembly 26, and the bottom of the guide rod 21 is fixedly connected to the first gland assembly 24.

[0025] When in use, when the steering wheel 20 is turned to one side to drive the guide rod 21 to rotate by 45°, the guide rod 21 drives the first gland convex disc 40 to rotate, and the external extrusion to the first gland connecting plate 30 is released. Under the action of the first gland tension spring 41, the first gland connecting plate 30 retracts into the first gland assembly 24 and releases the connection with the column 31 in the second gland assembly 25; the first gland assembly 24 is separated from the gland body and moves downward close to the top of the corrugated paper box, and the first gland limiting plates 28 are separated from the first gland body and moved downward, and the first gland limiting plates 28 on all sides are close to the side walls of the corrugated paper box to form a fixed state. At this time, the cylinder 18 is started so that the output end of the cylinder applies pressure to the top of the steering wheel 20, the parameters are recorded by the pressure sensor, and the extrusion deformation of the outer box is observed; Alternatively, when the steering wheel 20 is turned to the other side to drive the guide rod 21 to rotate by 45°, the guide rod 21 drives the second gland convex disc 50 and the column 31 to rotate together through the vertical plate 52, and the second gland convex disc 50 releases the external extrusion to the second gland connecting plate 36. Under the action of the second gland tension spring, the second gland connecting plate 36 retracts into the second gland assembly 25 and releases the connection with the third gland assembly 26; the second gland assembly 25 detaches from the gland body and moves downward together with the first gland assembly to be close to the top of the corrugated paper box, and the second gland limit plates 35 are all detached from the second gland body and moved downward, and the second gland limit plates 35 on all sides are close to the side walls of the corrugated paper box to form a fixed state. At this time, the cylinder 18 is started so that the output end of the cylinder applies pressure to the top of the steering wheel 20, the parameters are recorded by the pressure sensor, and the extrusion deformation of the outer box is observed; Alternatively, the guide rod 21 is lifted upwards through the steering wheel 20 to trigger the hook unit inside the suspension rod 22 and then lowered, so that the entire cover body moves downward close to the top of the corrugated box, and the third cover limit plates 39 are close to the side walls of the corrugated box to form a fixed state. At this time, the cylinder 18 is started so that the output end of the cylinder applies pressure to the top of the steering wheel 20, the parameters are recorded through the pressure sensor, and the extrusion deformation of the outer box body is observed; Through any of the above three methods, the pressure covers and limit plates of different sizes can be touched to fix the corresponding corrugated box body and then perform pressure testing. The device can be flexibly converted and the operation is simple and fast.

[0026] In the process of transporting goods, corrugated boxes will be subjected to vibration during transportation, and corrugated boxes are mostly stacked, which will bear the lateral stress and vertical compression deformation caused by vibration; this device is designed to simulate the vibration of transportation and detect the vibration resistance under different superimposed pressures (excluding the side force).

[0027] In this device, a driving part and a telescopic component are installed inside the base 11. The base 11 cooperates with the test bench 13 to generate detection items. The detection items at least include conventional items, acceleration and deceleration items, and bumpy items, as well as the superposition of conventional items and bumpy items and acceleration and deceleration items and bumpy items.

[0028] In the conventional project, the control panel 12 is used to control the driving parts on both sides to reciprocate at the same frequency and in different directions; the driving parts on both sides reciprocate at the same frequency and in different directions, which can simulate GB / T 4857.7-2005 Basic Test for Packages for Transport Part 7: Sine Constant Frequency Vibration Test and GB / T 4857.10-2005 Basic Test for Packages for Transport Part 10: Sine Variable Frequency Vibration Test. Conventional projects can be used as basic vibration tests to determine the ability of corrugated boxes to withstand specific environmental vibrations; in addition, the resonance points of samples and contents during transportation can be tested, and whether the samples and contents will be damaged when the samples or contents resonate can be tested.

[0029] During acceleration and deceleration projects, the control panel 12 is used to control the reciprocating operation of the driving parts on both sides at the same frequency and direction; the control panel 12 is used to control the reciprocating operation of the telescopic component during bumpy projects; when the corrugated cardboard boxes are stacked and are bumped during transportation, the corrugated cardboard boxes stacked on top may squeeze the corrugated cardboard boxes below. The cover mechanism 23 is used to simulate the box above the corrugated box, so as to accurately obtain the anti-vibration parameters of the corrugated cardboard boxes during actual use.

[0030] When the two projects are superimposed, there are two rules of superimposed operation corresponding to them: when the conventional project and the bumpy project are superimposed, the control panel 12 is used to control the reciprocating operation of the driving members on both sides at the same frequency and in different directions, and the reciprocating operation of the telescopic component; when the acceleration and deceleration project and the bumpy project are superimposed, the control panel 12 is used to control the reciprocating operation of the driving members on both sides at the same frequency and in different directions, and the reciprocating operation of the telescopic component.

[0031] The driving member and the cylinder 18 are both connected to the control panel 12 by signals. The control panel 12 is used to receive user instructions, obtain detection items according to the user instructions, and control the driving member and the cylinder 18 to operate according to corresponding rules according to the detection items.

[0032] The base 11 and the test bench 13 cooperate to generate test items. The components in the base 11 and the test bench 13 as well as the control panel 12 and the cylinder 18 are all existing technologies, and the principle and structure are not described in detail here.

[0033] Furthermore, the third gland assembly 26 is a frame structure, the inner wall of the frame is provided with third gland fixing grooves 38 in an array, and the bottom end of the frame is provided with third gland limiting plates 39 in an array.

[0034] Figure 1 and Figure 2 As shown in the figure, the frame structure of the third pressure cover assembly 26 is fixedly connected to the support rod 15, which enhances the stable support of the pressure cover mechanism 23 and facilitates the smooth falling off and downward movement of the first pressure cover assembly 24 or the second pressure cover assembly 25; at the same time, the third pressure cover assembly 26 is moved up and down under the action of the hook unit of the suspension rod 22, providing supporting force and maintaining the angle of the third pressure cover assembly 26 stable.

[0035] Furthermore, the first pressure cover assembly 24 includes a first pressure cover body with a cavity structure, a first pressure cover boss 40 rotatably installed inside the first pressure cover body, the top of the first pressure cover boss 40 is fixedly connected to the bottom of the guide rod 21, the first pressure cover connecting plates 30 are slidably arranged around the first pressure cover boss 40, the first pressure cover connecting plates 30 are limited by sliding grooves, and the first pressure cover tension springs 41 are arranged on the side of the first pressure cover connecting plates 30 close to the first pressure cover boss 40; and a plurality of first pressure cover limiting units are arranged on the periphery of the first pressure cover body.

[0036] Figure 3 As shown in the figure, the first gland convex disc 40 is driven to rotate by adjusting the rotation of the guide rod 21, and the rotation angle of the first gland convex disc 40 is 45°, so that the convex block on the first gland convex disc 40 is away from the first gland connecting plate 30. Under the action of the first gland tension spring 41, the first gland connecting plate 30 is retracted from the second gland fixing groove 33 to the inside of the first gland body, and the connection between the first gland assembly 24 and the second gland assembly 25 is released; It should be noted that a groove 32 adapted to the size of the first gland body is formed at the bottom of the column 31, and a plurality of second gland fixing grooves 33 are formed on the inner wall of the groove 32; When the first gland connecting plate 30 extends out of the first gland body, it enters the second gland fixing groove 33 to fix the first gland assembly 24 to the column 31; The column 31 and the second gland boss 50 are fixedly connected, the second gland boss 50 is rotatably arranged on the top of the second gland body, and the column 31 is rotatably installed in the through hole 49 of the second gland body; the column 31 and the second gland boss 50 are both provided with a connected arc groove 51, and a vertical plate 52 is fixed on the guide rod 21, and the vertical plate 52 is located inside the arc groove 51.

[0037] When the guide rod 21 rotates toward the side of the opening of the arc groove 51, the guide rod 21 rotates in the arc groove 51, and the guide rod 21 drives the first pressure cover convex plate 40 to rotate, thereby realizing the conversion of the connection relationship between the first pressure cover assembly 24 and the second pressure cover assembly 25; when the guide rod 21 rotates toward the side of the arc groove 51 close to the side wall, it drives the column 31 and the second pressure cover convex plate 50 to rotate together, and the rotation of the second pressure cover convex plate 50 realizes the conversion of the connection relationship between the second pressure cover assembly 25 and the third pressure cover assembly 26.

[0038] The angle of the arc groove 51 is 45°, which is beneficial to the position conversion of the connecting plate and the convex disc in the first gland assembly 24 and the second gland assembly 25, and realizes complete contact and separation.

[0039] Furthermore, the first pressure cover limiting unit includes a first pressure cover limiting plate 28 and a first pressure cover T-slot 27, the first pressure cover T-slot 27 is located on one side of the first pressure cover body, the T-shaped portion of the first pressure cover limiting plate 28 is connected to the bottom of the first pressure cover T-slot 27 through the first pressure cover limiting tension spring 48, the limiting portion of the first pressure cover limiting plate 28 slides up and down on the outside of the first pressure cover body, and a first pressure cover reset member is arranged on one side of the first pressure cover T-slot 27.

[0040] Figure 3 and Figure 4 As shown in FIG. 1 , the first gland limiting plate 28 has a T-shaped portion and a limiting portion that are vertically connected.

[0041] When the first cover assembly 24 is located inside the second cover assembly 25, the first cover reset member supports and limits the first cover limit plate 28, so that the first cover limit plate 28 is located inside the first cover body. When the first cover assembly 24 is separated from the second cover assembly 25, the first cover reset member releases the support and limitation on the first cover limit plate 28. Under the action of the first cover limit tension spring 48, the first cover limit plate 28 is subjected to downward pulling force, and the limiting portion of the first cover limit plate 28 is outside the first cover body, thereby realizing the limiting and fixing of the corrugated cardboard box.

[0042] Furthermore, the first gland reset member includes a first gland wedge plate 29, a first gland reset groove 46 and a first gland clamping plate groove 47 are provided on one side of the first gland T-slot 27, the first gland reset groove 46 is connected with the first gland T-slot 27, the first gland wedge plate 29 is installed inside the first gland reset groove 46, the first gland baffle 42 is fixed on the first gland wedge plate 29, the first gland spring 44 is sleeved on the first gland wedge plate 29, the other end of the first gland wedge plate 29 is hinged to the first gland clamping plate 45, the first gland clamping plate 45 is in a horizontal position to support the first gland limit plate 28, and the first gland clamping plate 45 is in a vertical state, located in the first gland clamping plate groove 47, which is conducive to the upward reset of the first gland limit plate 28.

[0043] Figure 4 As shown in , when the first gland assembly 24 is located inside the second gland assembly 25, the first gland wedge plate 29 is compressed into the first gland reset groove 46, so that the first gland clamping plate 45 supports the first gland limit plate 28 to realize that the first gland limit plate 28 is inside the first gland body; When the first gland assembly 24 is located outside the second gland assembly 25, under the action of the first gland spring 44, the first gland wedge plate 29 moves outward, driving the first gland clamping plate 45 to enter the first gland reset groove 46, releasing the limit of the first gland limit plate 28, and the first gland limit plate 28 moves downward to limit and fix the corrugated paper box body; The first gland clamping plate 45 is connected to the first gland wedge plate 29 via the first gland hinge seat 43, and the bottom of the first gland hinge seat 43 supports the first gland clamping plate 45, so that the first gland clamping plate 45 can rotate within a range of 90 degrees between the vertical and horizontal positions; After the first pressure cover limit plate 28 is reset after being moved down for use, when the first pressure cover wedge plate 29 is located inside the first pressure cover body, the first pressure cover clamping plate 45 is squeezed and is located in the first pressure cover T-slot 27. At this time, the first pressure cover limit plate 28 is pushed upward to squeeze the first pressure cover clamping plate 45, so that the first pressure cover clamping plate 45 is vertically rotated 90 degrees and then returns to a horizontal state to form a support so that the first pressure cover limit plate 28 is located inside the first pressure cover body; the first pressure cover limit plate 28 is reset after being moved down for use.

[0044] It should be noted that an elastic member is provided on the upper portion of the first pressing cover clamping plate groove 47 to facilitate the first pressing cover clamping plate 45 to return to a horizontal state.

[0045] Furthermore, the second gland assembly 25 includes a second gland body with a cavity structure, a second gland boss 50 rotatably installed inside the second gland body, second gland connecting plates 36 are slidably arranged around the second gland boss 50, the second gland connecting plates 36 are limited by sliding grooves, and a second gland tension spring is arranged on the side of the second gland connecting plates 36 close to the second gland boss 50; a plurality of second gland limiting units are arranged on the periphery of the second gland body; a through hole 49 is provided in the middle of the second gland body, a column 31 is installed in the through hole 49, and the top of the column 31 is fixedly connected to the bottom end of the second gland boss 50 to form a swivel; a groove is provided at the bottom of the column 31, and the first gland assembly 24 is installed in the groove, the guide rod 21 is penetrated through the swivel and fixedly connected to the first gland boss 40 of the first gland assembly 24; an arc groove 51 is provided on the swivel, and a vertical plate 52 is fixed on the guide rod 21, and the vertical plate 52 is located inside the arc groove 51.

[0046] Figure 5 As shown in the figure, when the guide rod 21 rotates toward the side of the opening of the arc groove 51, the guide rod 21 rotates in the arc groove 51, and the guide rod 21 drives the first pressure cover convex disc 40 to rotate, thereby realizing the conversion of the connection relationship between the first pressure cover assembly 24 and the second pressure cover assembly 25; when the guide rod 21 rotates toward the side of the arc groove 51 close to the side wall, it drives the column 31 and the second pressure cover convex disc 50 to rotate together, and the rotation of the second pressure cover convex disc 50 realizes the conversion of the connection relationship between the second pressure cover assembly 25 and the third pressure cover assembly 26.

[0047] The angle of the arc groove 51 is 45°, which is beneficial to the position conversion of the connecting plate and the convex disc in the first gland assembly 24 and the second gland assembly 25, and realizes complete contact and separation.

[0048] When the column 31 and the second gland convex plate 50 rotate together with the guide rod 21, The second gland boss 50 rotates at an angle of 45°, so that the protrusion on the second gland boss 50 is away from the second gland connecting plate 36. Under the action of the second gland tension spring, the second gland connecting plate 36 retracts from the third gland fixing groove 38 to the inside of the second gland body, thereby releasing the connection between the second gland assembly 25 and the third gland assembly 26. At this time, the first gland assembly 24 and the second gland assembly 25 are detached from the third gland assembly 26 as a whole, and the corrugated box body is inspected.

[0049] The column 31 and the second gland boss 50 are fixedly connected, the second gland boss 50 is rotatably arranged on the top of the second gland body, and the column 31 is rotatably installed in the through hole 49 of the second gland body; the column 31 and the second gland boss 50 are both provided with a connected arc groove 51, and a vertical plate 52 is fixed on the guide rod 21, and the vertical plate 52 is located inside the arc groove 51.

[0050] Furthermore, the second gland limiting unit includes a second gland limiting plate 35 and a second gland T-slot 34, the second gland T-slot 34 is located on one side of the second gland body, the T-shaped portion of the second gland limiting plate 35 is connected to the bottom of the second gland T-slot 34 through a second gland limiting tension spring, the limiting portion of the second gland limiting plate 35 slides up and down on the outside of the second gland body, and a second gland reset member is arranged on one side of the second gland T-slot 34; the second gland reset member includes a second gland wedge plate 37, and one side of the second gland T-slot 34 is opened. A second gland reset groove and a second gland clamping plate groove are provided, and the second gland reset groove is connected with the second gland T-slot 34. A second gland wedge plate 37 is installed inside the second gland reset groove, and a second gland baffle is fixed on the second gland wedge plate 37. A second gland spring is sleeved on the second gland wedge plate 37, and the other end of the second gland wedge plate 37 is hinged to the second gland clamping plate. When the second gland clamping plate is in a horizontal position, it supports the second gland limit plate 35. When the second gland clamping plate is in a vertical state, it is located in the clamping plate groove, which is beneficial to the upward reset of the second gland limit plate 35.

[0051] Figure 3-Figure 5 As shown in , the second cover limiting unit has a similar structure and the same principle as the first cover limiting unit, and the specific working process can refer to the first cover limiting unit.

[0052] Furthermore, the suspension rod 22 includes a sleeve 53 and a sleeve rod 54, a hook unit is arranged inside the sleeve 53, the hook unit includes a conical platform 55, an inverted conical platform 56, a wedge block 58, a connecting rod 59 and a compression spring 60, the end of the sleeve rod 54 is fixedly connected to the guide rod 57, the top of the guide rod 57 is fixedly provided with a conical platform 55, the inverted conical platform 56 is slidably sleeved on the guide rod 57, a through hole is opened on the sleeve 53, the through hole is located on the opposite side walls of the sleeve 53, the wedge blocks 58 are slidably installed in the through holes on both sides, a connecting rod 59 is fixedly provided on the end of the wedge block 58 close to the outer side, and a compression spring 60 is sleeved on the connecting rod 59.

[0053] Figure 7The diagram in the figure shows the state when the hook unit is locked. When the third gland assembly 26 is needed for inspection, the guide rod 21 is lifted upward to drive the first gland assembly 24, the second gland assembly 25 and the third gland assembly 26 connected to each other to move upward together, and the driving sleeve rod 54, the conical platform 55 and the inverted conical platform 56 are moved upward together. The top of the inverted conical platform 56 squeezes the wedge blocks 58 on both sides back into the inner wall of the sleeve 53, and the inverted conical platform 56 moves upward to the top of the wedge block 58; at this time, the locking is released. When the guide rod 21 is subjected to an upward external force, under the action of gravity, the inverted conical platform 56 slides upward on the guide rod 57 and fits with the conical platform 55, and the side of the guide rod 57 abuts against the wedge block 58 and slides down, so that the conical platform 55 and the inverted conical platform 56 are separated from the limit support of the wedge block 58, and the sleeve rod 54 moves downward, and finally the first gland assembly 24, the second gland assembly 25 and the third gland assembly 26 move downward as a whole to the bottom of the corrugated paper box, and the third gland limit plate 39 limits and fixes the side of the box. The hook unit allows the gland mechanism 23 to move downward quickly for inspection, which is simple to operate and improves efficiency.

[0054] Furthermore, a pressure sensor (not shown) is provided at the output end of the cylinder 18 for real-time monitoring of the pressure value; a displacement sensor (not shown) is provided on the support rod 15 for detecting the displacement of the capping mechanism; the pressure sensor and the displacement sensor are both electrically connected to the control panel.

[0055] By installing a pressure sensor at the output end of the cylinder and a displacement sensor on the support rod, real-time monitoring of pressure and displacement during the corrugated box strength test is achieved. Both sensors are electrically connected to the control panel 12, and can accurately record the deformation of the box under different pressures, providing objective and real-time data support for the box strength assessment, and effectively improving the accuracy and reliability of the test. A camera is set on one side of the detection device to capture the deformation during the test, which is conducive to providing further support for the data.

[0056] The method for testing using a device comprises the following steps: S1. Place the corrugated paper box to be tested on the test bench 13, and select the corresponding marking line 17 according to the box size for precise positioning; S2, selecting a capping assembly of a suitable size for the capping mechanism 23, specifically including: S21, rotating the steering wheel 20 to one side, so that the guide rod 21 rotates 45 degrees, the first cover assembly 24 is separated from the cover body and moves down to the top of the corrugated paper box, and the first cover limit plate 28 is close to the side wall of the paper box to achieve limit fixation; S22, rotating the steering wheel 20 to the other side, so that the guide rod 21 rotates 45 degrees, the second gland assembly 25 is separated from the gland body and moves down to the top of the corrugated paper box, and the second gland limit plate 35 is close to the side wall of the paper box to achieve limit fixation; S23, lift the guide rod 21 upward to trigger the hook unit of the suspension rod 22, so that the cover body moves down to the top of the corrugated paper box as a whole, and the third cover limit plate 39 is close to the side wall of the paper box to achieve limit fixation; S3, start the cylinder 18 so that its output end applies pressure to the top of the steering wheel 20, record the pressure parameters in real time through the pressure sensor on the cylinder 18, and observe the extrusion deformation of the outer box; S4. Detect the displacement of the capping mechanism 23 through the displacement sensor on the support rod 15, and evaluate the strength of the corrugated paper box based on the pressure and displacement data.

[0057] The present invention illustrates the technical concept of the present invention through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that the relevant improvements to the present invention fall within the protection scope and disclosure scope of the present invention.

Claims

1. A corrugated paper box strength testing device, comprising a test bench (13) for placing the corrugated paper box, a base (11) being arranged at the bottom of the test bench (13), a control panel (12) being installed on one side of the base (11), and a bracket (14) being installed above the test bench (13), characterized in that: A cylinder (18) is mounted on the top plate (16) of the bracket (14); a support rod (15) is arranged below the top plate (16); a guide sleeve (19) is fixedly arranged on the support rod (15); a guide rod (21) is movably arranged inside the guide sleeve (19); a steering wheel (20) is fixedly arranged on the top of the guide rod (21); the top of the steering wheel (20) abuts against the output end of the cylinder (18); and the bottom of the guide rod (21) is fixedly connected to a capping mechanism (23); The gland mechanism (23) comprises a first gland assembly (24), a second gland assembly (25) and a third gland assembly (26); the third gland assembly (26) is connected to the bottom of the support rod (15) via a suspension rod (22); the second gland assembly (25) is sleeved inside the third gland assembly (26); and the first gland assembly (24) is sleeved inside the second gland assembly (25); the guide rod (21) is movably inserted into the second gland assembly (25) and the third gland assembly (26), and the bottom of the guide rod (21) is fixedly connected to the first gland assembly (24); Under normal conditions, the first pressing cover assembly (24), the second pressing cover assembly (25) and the third pressing cover assembly (26) are all in a mutually nested state to form a pressing cover body; when the guide rod (21) is rotated to one side, the first pressing cover assembly (24) is separated from the pressing cover body and moves downward, or when the guide rod (21) is rotated to the other side, the second pressing cover assembly (25) is separated from the pressing cover body and moves downward, or the guide rod (21) is lifted upward and then lowered, and the pressing cover body moves downward as a whole and moves to the top of the corrugated paper box.

2. The corrugated box strength testing device according to claim 1, characterized in that: The third gland assembly (26) is a frame structure, the inner wall of the frame is provided with third gland fixing grooves (38) in an array, and the bottom end of the frame is provided with third gland limiting plates (39) in an array.

3. The corrugated box strength testing device according to claim 1, characterized in that: The first gland assembly (24) comprises a first gland body with a cavity structure, a first gland boss (40) rotatably installed inside the first gland body, the top of the first gland boss (40) is fixedly connected to the bottom of the guide rod (21), first gland connecting plates (30) are slidably arranged around the first gland boss (40), the first gland connecting plates (30) are limited by sliding grooves, and a first gland tension spring (41) is arranged on one side of the first gland connecting plate (30) close to the first gland boss (40); and a plurality of first gland limiting units are arranged on the periphery of the first gland body.

4. The corrugated box strength testing device according to claim 3, characterized in that: The first gland limiting unit comprises a first gland limiting plate (28) and a first gland T-shaped groove (27); the first gland T-shaped groove (27) is located on one side of the first gland body; the T-shaped portion of the first gland limiting plate (28) is connected to the bottom of the first gland T-shaped groove (27) via a first gland limiting tension spring (48); the limiting portion of the first gland limiting plate (28) slides up and down on the outside of the first gland body; and a first gland reset member is provided on one side of the first gland T-shaped groove (27).

5. The corrugated box strength testing device according to claim 4, characterized in that: The first gland reset member comprises a first gland wedge plate (29); a first gland reset groove (46) and a first gland clamping plate groove (47) are provided on one side of the first gland T-shaped groove (27); the first gland reset groove (46) and the first gland T-shaped groove (27) are connected to each other; the first gland wedge plate (29) is installed inside the first gland reset groove (46); a first gland baffle plate (42) is fixed to the first gland wedge plate (29); a first gland spring (44) is sleeved on the first gland wedge plate (29); the other end of the first gland wedge plate (29) is hinged to the first gland clamping plate (45); when the first gland clamping plate (45) is in a horizontal position, it supports the first gland limit plate (28); when the first gland clamping plate (45) is in a vertical state, it is located in the first gland clamping plate groove (47), so as to facilitate the upward reset of the first gland limit plate (28).

6. The corrugated box strength testing device according to claim 3, characterized in that: The second gland assembly (25) comprises a second gland body with a cavity structure, a second gland convex disc (50) rotatably mounted inside the second gland body, second gland connecting plates (36) slidably arranged around the second gland convex disc (50), the second gland connecting plates (36) are limited by sliding grooves, and a second gland tension spring is arranged on one side of the second gland connecting plates (36) close to the second gland convex disc (50); a plurality of second gland limiting units are arranged on the outer periphery of the second gland body; A through hole (49) is provided in the middle of the second gland body, a column (31) is installed in the through hole (49), and the top of the column (31) is fixedly connected to the bottom end of the second gland convex plate (50) to form a swivel; a groove is provided at the bottom of the column (31), and the first gland assembly (24) is installed in the groove; the guide rod (21) is inserted into the swivel and fixedly connected to the first gland convex plate (40) of the first gland assembly (24); an arc groove (51) is provided on the swivel, and a vertical plate (52) is fixed on the guide rod (21), and the vertical plate (52) is located inside the arc groove (51).

7. The corrugated box strength testing device according to claim 6, characterized in that: The second gland limiting unit comprises a second gland limiting plate (35) and a second gland T-shaped groove (34), the second gland T-shaped groove (34) being located at one side of the second gland body, the T-shaped portion of the second gland limiting plate (35) being connected to the bottom of the second gland T-shaped groove (34) via a second gland limiting tension spring, the limiting portion of the second gland limiting plate (35) sliding up and down on the outside of the second gland body, and a second gland reset member being arranged at one side of the second gland T-shaped groove (34); The second gland reset member comprises a second gland wedge plate (37), a second gland reset groove and a second gland clamping plate groove are provided on one side of the second gland T-slot (34), the second gland reset groove and the second gland T-slot (34) are connected to each other, the second gland wedge plate (37) is installed inside the second gland reset groove, a second gland baffle is fixed to the second gland wedge plate (37), a second gland spring is sleeved on the second gland wedge plate (37), the other end of the second gland wedge plate (37) is hinged to the second gland clamping plate, the second gland clamping plate supports the second gland limit plate (35) when the second gland clamping plate is in a horizontal position, and is located in the clamping plate groove when the second gland clamping plate is in a vertical state, so as to facilitate upward reset of the second gland limit plate (35).

8. The corrugated box strength testing device according to claim 2, characterized in that: The suspension rod (22) comprises a sleeve (53) and a sleeve rod (54), the end of the sleeve rod (54) is fixedly connected to a guide rod (57), a conical platform (55) is fixedly arranged at the top end of the guide rod (57), an inverted conical platform (56) is slidably sleeved on the guide rod (57), a through hole is opened on the sleeve (53), the through hole is located on opposite side walls of the sleeve (53), wedge blocks (58) are slidably installed in the through holes on both sides, a connecting rod (59) is fixedly arranged on the end of the wedge block (58) close to the outer side, and a compression spring (60) is sleeved on the connecting rod (59).

9. The corrugated box strength testing device according to claim 1, characterized in that: The output end of the cylinder (18) is provided with a pressure sensor for real-time monitoring of the pressure value; the support rod (15) is provided with a displacement sensor for detecting the displacement of the capping mechanism; the pressure sensor and the displacement sensor are both electrically connected to the control panel.

10. A method for testing using the device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Place the corrugated paper box to be tested on the test bench (13), and select the corresponding marking line (17) according to the size of the box for precise positioning; S2. Selecting a capping assembly of suitable size for the capping mechanism (23), specifically comprising: S21, rotating the steering wheel (20) to one side so that the guide rod (21) rotates at an angle of 45 degrees, the first cover assembly (24) is separated from the cover body and moves down to the top of the corrugated paper box, and the first cover limit plate (28) is close to the side wall of the paper box to achieve limit fixation; S22, rotating the steering wheel (20) to the other side, so that the guide rod (21) rotates 45 degrees, the second cover assembly (25) is separated from the cover body and moves down to the top of the corrugated paper box, and the second cover limit plate (35) is close to the side wall of the paper box to achieve limit fixation; S23, lifting the guide rod (21) upward to trigger the hook unit of the suspension rod (22), so that the cover body as a whole moves downward to the top of the corrugated paper box, and the third cover limiting plate (39) is close to the side wall of the paper box to achieve limiting fixation; S3, starting the cylinder (18) so that its output end applies pressure to the top of the steering wheel (20), recording the pressure parameters in real time through the pressure sensor on the cylinder (18), and observing the extrusion deformation of the outer part of the box; S4. Detect the displacement of the capping mechanism (23) by using a displacement sensor on the support rod (15), and evaluate the strength of the corrugated paper box by combining the pressure and displacement data.

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