Multi-point type container floor stress intensity detection device

Abstract

The application discloses a multi-point container floor stress strength detection device, and relates to the field of strength detection.The upper end of a bearing base body is provided with a detection resistance component, and the outer side of the bearing base body is provided with a hydraulic drive assembly.The output end of the hydraulic drive assembly is provided with a butt joint reserved bearing piece, and the upper end surface of the butt joint reserved bearing piece is used for placing a to-be-detected board.The upper end of the butt joint reserved bearing piece is provided with a limiting butt joint piece.The multi-point container floor stress strength detection device uses the multi-point detection resistance component at the upper end of the equipment to limit the middle end of the floor, forms a counter-pressure detection structure, and is loaded in a mode completely consistent with the stress state of the floor actually lifted by the forks of a forklift, so that multi-point linear contact loading is realized, stress distribution and deformation characteristics of the container floor under the action of multiple forks can be accurately simulated, the strength difference of the floor at different bearing positions can be detected, and more comprehensive data support is provided for optimizing the structure design and material selection of the floor.

Description

Technical Field

[0001] This invention relates to the field of strength testing technology, specifically to a multi-point container floor stress strength testing device. Background Technology

[0002] Container flooring materials are undergoing an accelerated transformation from traditional hardwoods to new composite materials. New environmentally friendly flooring materials such as bamboo-wood composite flooring, COSB oriented strand board, high-performance reconstituted bamboo flooring, and bamboo fiber reinforced composite materials are developing rapidly. These new materials, through technologies such as material composite, fiber orientation, and multi-scale interface reinforcement, achieve resource renewability and low environmental impact while maintaining excellent mechanical properties, and have become the mainstream direction of container flooring manufacturing. As the core carrier of logistics and transportation, the composite new material floor components of containers directly bear the pressure of cargo stacking and dynamic loads during transportation. They are key load-bearing components that ensure cargo safety and the integrity of the container structure. With the continuous growth of global trade and the continuous improvement of logistics efficiency, container flooring not only needs to have higher strength, rigidity and impact resistance, but also faces the urgent need for lightweighting, environmental protection and functionality. For example, the patent with announcement number CN118857926B describes a wood flooring stress strength testing device, which includes a testing platform and a testing head that drives a pressure sensor. A support frame is fixedly connected to the top of the testing platform, and a hydraulic telescopic cylinder is fixedly connected to the top of the support frame. A waste port is opened through the top of the testing platform. A pair of baffles are hinged to both ends of the waste port. A pair of discharge plates are provided inside the waste port. Each discharge plate has a recessed placement groove on its top. An adjustment cavity is opened inside the testing platform. A cleaning mechanism is provided inside the adjustment cavity. The cleaning mechanism includes a baffle, which is located below the support frame. For example, the patent with announcement number CN109932250A describes a wood flooring stress strength testing device, which includes a housing, a sealed base at the bottom of the housing, a first platform on one side of the upper end of the sealed base and inside the housing, a second platform on one side of the first platform and above the sealed base, and fixed vertical rods fixedly connected to both sides of the upper end of the first and second platforms to ensure the efficiency of strength testing. It is also equipped with a cold air blower, a honeycomb ceramic heating plate and a water tank to adjust the temperature and humidity environment around the wood flooring. In this way, it can simulate multiple inspection environments and meet the strength testing of wood flooring under various environments. For example, the patent with publication number CN110686975A describes a wood flooring stress strength testing device, whose structure includes a bottom fixing box, a lifting side rod, and a support rod. The lifting side rod is installed on the upper surface of the bottom fixing box, and the support rod is embedded inside the lifting side rod and movably connected. The clamping plate opening installed on the support rod is adjusted in height along with the lifting side rod, and pressure is applied to the wood flooring clamped between the clamping plate openings. The bottom end of the wood flooring abuts against the adhesive bottom, and is fixed by the large surface area of ​​the adhesive surface, which helps to fix the surface that abuts against external objects, and is held in place by the inclined fixing edge. Most of the existing technologies mentioned above improve the overall structure. However, existing container floor stress strength testing devices operate by having forklift forks lift the container floor from below, with the weight of the cargo applying downward pressure. The floor is under stress with both ends supported and the center suspended. In contrast, existing testing devices use a reverse loading method with both ends supported and the center pressed down. This results in a fundamental difference between the stress distribution and deformation mode of the floor and the actual working conditions. In particular, for new composite flooring materials, the failure mechanisms differ under different stress modes. Traditional testing methods cannot accurately predict actual performance. Furthermore, when the tested material suddenly breaks during loading, there is no effective way to protect the broken material, which limits the application of these methods. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-point container floor stress strength testing device to solve the problems mentioned in the background art, which are that the existing testing devices adopt a reverse loading method with two-end support and central pressure, resulting in a fundamental difference between the stress distribution and deformation mode of the floor and the actual working conditions. In particular, for new composite floor materials, the failure mechanism is different under different stress modes, and traditional testing methods are difficult to accurately predict the actual performance. At the same time, when the tested board suddenly breaks during loading, it is impossible to effectively protect the broken material, which has certain limitations in use.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a multi-point container floor stress strength testing device, comprising a bearing base, a detection contact component installed at the upper end of the bearing base, and a hydraulic drive assembly installed on the outer side of the bearing base; a docking reserved bearing component is installed at the output end of the hydraulic drive assembly, and the plate to be tested is placed on the upper surface of the docking reserved bearing component; a limit docking component is provided at the upper end of the docking reserved bearing component, and a guiding protection structure is provided on the inner side of the docking reserved bearing component, thereby protecting the plate from fracture under extreme conditions during pressure testing.

[0005] Furthermore, the guiding and protective structure is provided with a nested abutment member, which penetrates through the interior of the docking reserved support member. A vertical limiting reserved groove is provided on the inner side of the docking reserved support member, and the vertical limiting reserved groove and the nested abutment member are mutually connected and penetrated. A reset spring is fixedly connected between the vertical limiting reserved groove and the nested abutment member.

[0006] Furthermore, the outer side of the nested abutment member is connected to the limiting docking member, the front end of the docking reserved bearing member is nested with an abutment support member, and the lower end of the abutment support member is fixedly connected to a docking transverse movable member, and the upper end of the docking transverse movable member passes through the interior of the docking reserved bearing member, and the lower end of the docking transverse movable member corresponds to the outer side of the nested abutment member.

[0007] Furthermore, when the plate workpiece supported by the pre-reserved bearing member is subjected to force at its middle end, the two ends of the workpiece generate upward deformation force, the end side of the workpiece applies pressure to the contacting support member, and the contact support member drives the lateral moving part of the docking to move synchronously along the inner side of the pre-reserved bearing member.

[0008] Furthermore, the lateral movable part of the docking applies pressure to the nested abutment of the contacting inclined structure, and the compression reset spring of the nested abutment drives the limiting docking part to move upward along the interior of the docking reserved bearing part.

[0009] Furthermore, the surface of the pre-reserved bearing component is provided with a central bearing structure, which is used to control the position accuracy of the bearing plate. The central bearing structure is provided with a first built-in transverse corrugated liquid bladder, which is located inside the pre-reserved bearing component and is connected to the abutment support component. The upper end of the pre-reserved bearing component is provided with a guide groove, and an elastic bearing movable component is nested inside the guide groove.

[0010] Furthermore, the lower outer side of the elastic bearing movable member is connected to a second built-in transverse corrugated liquid bladder, and a supply hose is provided through the outer side of the second built-in transverse corrugated liquid bladder. The supply hose passes through the inner side of the pre-reserved bearing member and the end of the supply hose is connected to the first built-in transverse corrugated liquid bladder.

[0011] Furthermore, as the abutting support moves along the inner side of the pre-reserved bearing member, it will simultaneously apply pressure to the first built-in transverse corrugated liquid bladder, and the first built-in transverse corrugated liquid bladder will supply the liquid to the interior of the second built-in transverse corrugated liquid bladder through the supply hose.

[0012] Furthermore, during the process of receiving oil supply and undergoing lateral deformation, the second built-in transverse corrugated liquid bladder pushes the outer elastic bearing movable component to move laterally along the surface of the docking reserved bearing component. The elastic bearing movable component has an arc-shaped structure when viewed from above.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This multi-point container floor stress strength testing device uses two symmetrically arranged hydraulic drive components to push the two sides of the floor sample workpiece from below. At the same time, the multi-point detection contact component at the top of the device restricts the middle of the floor, forming a pressure-type detection structure. Its loading method is completely consistent with the stress state of the floor actually lifted by the forklift forks, realizing multi-point line contact loading. It can accurately simulate the stress distribution and deformation characteristics of the container floor under the action of multiple forks, detect the strength difference of the floor at different load-bearing positions, and provide more comprehensive data support for optimizing the floor structure design and material selection. Furthermore, a guiding and protective structure is provided to protect the board from fracture under extreme conditions during pressure testing. During normal testing, the clamping mechanisms at both ends of the pre-reserved load-bearing component are unlocked. During the pressure test under extreme conditions, the two sides of the floor can deform freely upwards without affecting the natural bending deformation of the middle section after being stressed, ensuring that the test data accurately reflects the bending performance of the floor. In extreme cases where the board breaks, the middle section of the floor loses its strength support. By resetting the guiding and protective structure, the broken board is clamped from both sides by the limiting docking component, effectively preventing fragments from flying and injuring people. The overall structure of the equipment is more compact and easier to operate. At the same time, it avoids the obstruction of the observation field by the protective device, making it easier for the testing personnel to observe the crack propagation and fracture process in real time. Furthermore, a centrally located load-bearing structure is provided. This structure ensures accurate position detection of the load-bearing plate. As the contact support moves along the inner side of the pre-reserved load-bearing component, its inner side simultaneously applies pressure to the first built-in transverse corrugated liquid bladder. This allows the first built-in transverse corrugated liquid bladder to supply fluid to the second built-in transverse corrugated liquid bladder via a supply hose. As the second built-in transverse corrugated liquid bladder undergoes transverse deformation upon receiving the fluid supply, it pushes the outer elastic load-bearing movable component to move laterally along the surface of the pre-reserved load-bearing component. This centrally applies pressure to the plate, ensuring precise contact between the plate and the contact component, guaranteeing the accuracy of the detected force centering, and improving detection efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the hydraulic drive component of the present invention; Figure 3This is a schematic diagram of the semi-sectional three-dimensional structure of the pre-reserved bearing component for docking in this invention; Figure 4 For the present invention Figure 3 A magnified schematic diagram of the central part of the structure; Figure 5 This is a three-dimensional structural diagram of the limiting docking component of the present invention; Figure 6 This is a three-dimensional structural diagram of the lateral movable component of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the first built-in transverse corrugated liquid bladder of the present invention; Figure 8 This is a three-dimensional structural diagram of the elastic load-bearing movable component of the present invention; Figure 9 This is a three-dimensional structural diagram of the contact detection component of the present invention.

[0015] In the diagram: 1. Supporting base; 2. Detection and contact component; 3. Hydraulic drive assembly; 4. Docking reserved support component; 5. Nested contact component; 6. Limiting docking component; 7. Contact support component; 8. Docking lateral movable component; 9. Vertical limiting reserved groove; 10. First built-in lateral corrugated liquid bladder; 11. Supply hose; 12. Second built-in lateral corrugated liquid bladder; 13. Elastic bearing movable component; 14. Guide reserved groove; 15. Return spring. Detailed Implementation

[0016] 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.

[0017] Example 1: Please refer to Figures 1-9 This invention provides the following technical solution: a multi-point container floor stress strength testing device. To address the problem that existing testing devices use a reverse loading method with supports at both ends and pressure at the center, resulting in a fundamental difference between the stress distribution and deformation mode of the floor and the actual working conditions, especially for new composite flooring materials, whose failure mechanisms differ under different stress modes, making it difficult for traditional testing methods to accurately predict actual performance, and also failing to effectively protect the broken material when it suddenly breaks during loading, this invention discloses a device comprising: The upper end of the support base 1 is equipped with a detection contact component 2, and the outer side of the support base 1 is equipped with a hydraulic drive assembly 3; the output end of the hydraulic drive assembly 3 is equipped with a docking reserved support component 4, and the plate to be tested is placed on the upper surface of the docking reserved support component 4. The upper end of the docking reserved support component 4 is provided with a limit docking component 6, and the inner side of the docking reserved support component 4 is provided with a guide protection structure. The guide protection structure is used to protect the plate from fracture under extreme conditions during pressure testing.

[0018] The guiding and protective structure is equipped with a nested abutment member 5, which penetrates the interior of the docking reserved support member 4. A vertical limiting reserved groove 9 is provided on the inner side of the docking reserved support member 4, and the vertical limiting reserved groove 9 and the nested abutment member 5 are mutually connected and penetrate each other. A return spring 15 is fixedly connected between the vertical limiting reserved groove 9 and the nested abutment member 5. The outer side of the nested abutment member 5 is mutually connected to the limiting docking member 6. An abutment support member 7 is nested at the front end of the docking reserved support member 4, and a docking lateral movable member 8 is fixedly connected to the lower end of the abutment support member 7. The upper end of the docking lateral movable member 8 extends along the interior of the docking reserved support member 4. The lower end of the transverse movable part 8 and the outer position of the nested abutment part 5 correspond to each other. The whole uses two symmetrically arranged hydraulic drive components 3 to push the two sides of the floor sample workpiece from the bottom to the top. At the same time, the multi-point detection abutment part 2 at the upper end of the equipment restricts the middle of the floor, forming a pressure detection structure. Its loading method is completely consistent with the stress state of the floor actually lifted by the forklift forks, realizing multi-point line contact loading. It can accurately simulate the stress distribution and deformation characteristics of the container floor under the action of multiple forks, detect the strength difference of the floor at different load positions, and provide more comprehensive data support for optimizing the floor structure design and material selection.

[0019] During normal equipment testing, the clamping mechanisms at both ends of the pre-reserved bearing member 4 are unlocked. During extreme pressure testing, the two sides of the floor can freely deform upwards without affecting the natural bending deformation of the middle section under stress, ensuring the test data accurately reflects the floor's bending resistance. In extreme cases where the board breaks, the middle section of the floor loses its strength support. By guiding the protective structure to reset, the broken board is clamped from both sides by the limiting bearing member 6, effectively preventing flying debris from injuring people. The overall equipment structure is more compact and easier to operate, while avoiding obstruction of the observation field by the protective device, allowing testing personnel to observe crack propagation and fracture processes in real time. During testing, the board is placed between the pre-reserved bearing member 4 and the limiting bearing member 6, which drives the hydraulic drive component 3 to perform the lifting and pressure testing. The board supported by the pre-reserved bearing member 4... When the workpiece is subjected to force at its middle end, upward deformation force is generated at both ends of the workpiece. The workpiece end deforms and bends downward, thereby applying pressure to the contacting support member 7. This causes the contacting support member 7 to drive the docking lateral movable member 8 to move along the inner side of the docking reserved bearing member 4. The docking lateral movable member 8 applies pressure to the nested contact member 5 of the contacting inclined structure, causing the nested contact member 5 to compress the return spring 15 and drive the limiting docking member 6 to move upward along the inside of the docking reserved bearing member 4. This allows the two sides of the workpiece in the deformation state to disengage from the locked bearing state, preventing abnormal influence on the two sides of the workpiece during deformation. At the same time, in extreme cases, when the plate is broken under pressure, the workpiece that has quickly deformed and reset will disengage from the pressure state between itself and the contacting support member 7. At this time, the nested contact member 5 and the limiting docking member 6 that are freed from the force will quickly move downward by the reset force of the return spring 15, thereby gripping the end of the broken plate and preventing accidental injury from splashing.

[0020] Example 2: Based on Example 1, a centrally located load-bearing structure is also disclosed, the specific structure of which is as follows: The surface of the pre-reserved bearing component 4 is provided with a central bearing structure, which is used to ensure the positional accuracy of the bearing plate. The centrally mounted structure is equipped with a first built-in transverse corrugated liquid bladder 10, which is located inside the docking reserved support member 4. The first built-in transverse corrugated liquid bladder 10 and the abutting support member 7 are connected to each other. The upper end of the docking reserved support member 4 is provided with a guide reserved groove 14, and an elastic bearing movable member 13 is nested inside the guide reserved groove 14. As the abutting support member 7 moves along the inner side of the docking reserved support member 4, its inner side will simultaneously apply pressure to the first built-in transverse corrugated liquid bladder 10, allowing the first built-in transverse corrugated liquid bladder 10 to supply the second built-in transverse corrugated liquid bladder 12 through the supply hose 11. As the second built-in transverse corrugated liquid bladder 12 undergoes transverse deformation upon receiving the oil supply, it will push the outer elastic bearing movable member 13 to move laterally along the surface of the docking reserved support member 4, thereby applying central pressure to the plate and ensuring that its central contact with the detection abutting member 2 is accurate, thus guaranteeing the accuracy of its force detection.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-point container floor stress strength testing device, comprising a bearing base (1), wherein a detection contact component (2) is installed at the upper end of the bearing base (1), and a hydraulic drive assembly (3) is installed on the outer side of the bearing base (1). Its features are: The output end of the hydraulic drive assembly (3) is equipped with a docking reserved bearing (4), and the plate to be tested is placed on the upper surface of the docking reserved bearing (4). A limit docking part (6) is provided on the upper end of the docking reserved bearing (4), and a guide protection structure is provided on the inner side of the docking reserved bearing (4). The guide protection structure is used to protect the plate from breakage under extreme conditions during pressure testing.

2. The multi-point container floor stress strength testing device according to claim 1, characterized in that: The guiding and protective structure is provided with a nested abutment (5), and the nested abutment (5) passes through the interior of the docking reserved support (4). A vertical limiting reserved groove (9) is opened on the inner side of the docking reserved support (4), and the vertical limiting reserved groove (9) and the nested abutment (5) are connected to each other. A reset spring (15) is fixedly connected between the vertical limiting reserved groove (9) and the nested abutment (5).

3. The multi-point container floor stress strength testing device according to claim 2, characterized in that: The outer side of the nested abutment (5) is connected to the limiting docking part (6). The front end of the docking reserved bearing part (4) is nested with an abutment support part (7), and the lower end of the abutment support part (7) is fixedly connected to a docking transverse movable part (8). The upper end of the docking transverse movable part (8) passes through the interior of the docking reserved bearing part (4), and the lower end of the docking transverse movable part (8) corresponds to the outer side of the nested abutment (5).

4. The multi-point container floor stress strength testing device according to claim 3, characterized in that: When the plate workpiece supported by the pre-reserved bearing member (4) is subjected to force at the middle end, the two ends of the workpiece generate upward deformation force, the end side of the workpiece applies pressure to the contact support member (7), and the contact support member (7) drives the lateral moving part (8) of the docking to move synchronously along the inner side of the pre-reserved bearing member (4).

5. The multi-point container floor stress strength testing device according to claim 4, characterized in that: The lateral movable part (8) of the docking applies pressure to the nested abutment part (5) of the contacting inclined structure, and the nested abutment part (5) compresses the return spring (15) to drive the limiting docking part (6) to move upward along the interior of the docking reserved bearing part (4).

6. The multi-point container floor stress strength testing device according to claim 3, characterized in that: The surface of the pre-reserved bearing component (4) is provided with a central bearing structure, and the position detection accuracy of the bearing plate is guaranteed by the central bearing structure; The central bearing structure is provided with a first built-in transverse corrugated liquid bladder (10), and the first built-in transverse corrugated liquid bladder (10) is located inside the docking reserved bearing member (4), and the first built-in transverse corrugated liquid bladder (10) and the abutting support member (7) are docked with each other. The upper end of the docking reserved bearing member (4) is provided with a guide reserved groove (14), and an elastic bearing movable member (13) is nested inside the guide reserved groove (14).

7. The multi-point container floor stress strength testing device according to claim 6, characterized in that: The lower outer side of the elastic bearing movable member (13) is connected to the second built-in transverse corrugated liquid bladder (12), and the outer side of the second built-in transverse corrugated liquid bladder (12) is provided with a supply hose (11), and the supply hose (11) passes through the inner side of the docking reserved bearing member (4), and the end of the supply hose (11) is connected to the first built-in transverse corrugated liquid bladder (10).

8. The multi-point container floor stress strength testing device according to claim 7, characterized in that: As the abutment support (7) moves along the inner side of the docking reserved bearing (4), it will simultaneously apply pressure to the first built-in transverse corrugated liquid bladder (10), and the first built-in transverse corrugated liquid bladder (10) will supply the second built-in transverse corrugated liquid bladder (12) through the supply hose (11).

9. The multi-point container floor stress strength testing device according to claim 8, characterized in that: During the process of receiving oil supply and undergoing lateral deformation, the second built-in transverse corrugated liquid bladder (12) pushes the outer elastic bearing movable part (13) to move laterally along the surface of the docking reserved bearing part (4). The elastic bearing movable part (13) has an arc-shaped structure when viewed from above.

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