Ton bag load-bearing strength testing device and method

Abstract

The present invention discloses a device and method for testing the load-bearing strength of ton bags, which relates to the technical field of ton bag testing. The device comprises a mobile base, a supporting bottom box fixedly provided on the top surface of the mobile base, and a liftable lifting outer frame installed in the supporting bottom box, a lifting inner plate provided in the lifting outer frame, a lifting drive assembly for driving the lifting inner plate to move up and down along the inner wall of the lifting outer frame installed on the lifting outer frame, a first pressure plate and a second pressure plate hingedly connected at both ends of the lifting inner plate, and a blocking assembly for limiting the flipping of the first pressure plate and the second pressure plate installed on one side of the lifting outer frame. The present invention does not require the use of the deadweight of four layers of fully loaded bags for testing, making the test simpler and more convenient. In addition, the actual load-bearing pressure during the test can be adjusted as needed to meet the use requirements of higher conditions, and the test has a wider range of applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of ton bag testing, and in particular to a device and method for testing the load-bearing strength of a ton bag. Background Art

[0002] Ton bags, also known as bulk bags, space bags, flexible containers, ton bags, ton bags, space bags, and mother-and-child bags, are flexible transport packaging containers. Moisture-proof, dust-proof, radiation-resistant, and secure, ton bags are finding use in a variety of applications, particularly in the transport of bulk powders. They offer a large capacity, light weight, and ease of loading and unloading. However, the load-bearing strength of these bags is crucial to prevent breakage or spillage during transport. Therefore, after production, they undergo load-bearing strength testing to ensure they meet the demands of use.

[0003] In the load-bearing strength test of ton bags, the national usage standards must be met first. In the current load-bearing strength pressure test, one method is to place the fully loaded ton bags on a pressurizing machine for a pressure test. The pressure applied by the pressurizing machine is four times the full load weight of the ton bags. In this test method, the cost of the pressurizing equipment is high, and the pressure adjustment process requires precise control, which is more satisfactory. The other method is to use a static load method, that is, the dead weight of four layers of fully loaded bags. This method requires the use of forklift equipment to stack the fully loaded ton bags together, which has high operational requirements for the staff, and there are safety risks in the stacking process. Therefore, the above methods are more troublesome in the test of ton bags and have poor applicability. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of cumbersome testing and poor adaptability of ton bags in the prior art, and to propose a ton bag load-bearing strength testing device and method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A load-bearing strength testing device for ton bags comprises a mobile base, a supporting bottom box is fixedly provided on the top surface of the mobile base, a lifting outer frame capable of being raised and lowered is installed in the supporting bottom box, a lifting inner plate is provided in the lifting outer frame, a lifting driving assembly is installed on the lifting outer frame for driving the lifting inner plate to move up and down along the inner wall of the lifting outer frame, a first pressing plate and a second pressing plate are hingedly connected at both ends of the lifting inner plate, and a blocking assembly for limiting the flipping of the first pressing plate and the second pressing plate is installed on one side of the lifting outer frame;

[0007] The first and second pressure plates are of the same size and structure. The ends of the first and second pressure plates away from each other are provided with a fixed power arm assembly for placing a pressure bag. The ends of the first and second pressure plates close to each other are provided with a sliding resistance arm assembly for pressing down the load-bearing bag. The sliding resistance arm assembly slides horizontally along the length direction of the first and second pressure plates, so that the pressure of the sliding resistance arm assembly pressing down the load-bearing bag is a multiple of the pressure bag's own gravity.

[0008] Preferably, the top surface of the supporting bottom box is provided with a top opening for the lifting outer frame to slide out, and both side surfaces of the supporting bottom box are provided with side openings connected to the top opening and for the lifting inner plate to slide, and both sides of one end of the top opening are provided with sliding grooves for the blocking assembly to pass through.

[0009] Preferably, the four side surfaces of the lifting outer frame are in contact with the inner wall of the top opening, and both ends of the middle of the lifting outer frame have limit plates extending outward, and the bottom surface of each limit plate is connected to a lifting cylinder fixed in the supporting bottom box.

[0010] Preferably, the lifting drive assembly includes a screw installed in the middle of the inside of the lifting outer frame, sliding rods symmetrically arranged at both ends of the screw, and a drive motor installed on the top surface of the lifting outer frame. The output shaft of the drive motor is coaxially fixedly connected to the screw, and the lifting inner plate is installed on the outside of the screw and the two sliding rods.

[0011] Preferably, the blocking assembly includes a mounting plate fixed to the top of the outer side surface of the lifting frame, a driving shaft provided at both ends of the mounting plate, and a baffle fixed on the ends of the two driving shafts. A double-headed motor is provided inside the mounting plate, wherein the two output shafts of the double-headed motor are coaxially fixed to the two driving shafts respectively.

[0012] Preferably, connecting ear plates are symmetrically fixed at both ends of the lifting inner plate, one end of the first pressure plate and the second pressure plate are respectively hinged in the two sets of connecting ear plates, a screw hole adapted to the lead screw is penetrated through the middle of the lifting inner plate, and sliding holes adapted to the sliding rod are penetrated at both ends of the top surface of the lifting inner plate.

[0013] Preferably, side grooves are opened inward in the middle of the two symmetrical side surfaces of the first pressure plate and the second pressure plate, and scale lines are provided above the side grooves. Both sides of the adjacent ends of the first pressure plate and the second pressure plate are fixedly connected with a rotating shaft hinged to the connecting ear plate, and a groove is opened on the top surface of the other end of the second pressure plate.

[0014] Preferably, the fixed power arm assembly includes a fixed plate fixed to the top surface of one end away from the first pressure plate and the second pressure plate, a sliding plate arranged in the groove, and a first screw rod arranged in the groove and driving the sliding plate to move, the bottom end of the sliding plate fits in the groove and is adapted to the thread of the first screw rod, the top end of the sliding plate is the same size as the fixed plate, and one end of the first screw rod passes through the first pressure plate or the second pressure plate and is connected to the first hand wheel.

[0015] Preferably, the sliding resistance arm assembly includes a sliding frame with a sliding sleeve on the outside of the first pressure plate or the second pressure plate, a pressure block fixed on the bottom of the sliding frame, and a diffusion plate placed on the top surface of the load-bearing bag and connected to the pressure plate. The bottom surface of the pressure block is arc-shaped, and four connecting ropes are connected between the pressure block and the diffusion plate. Both sides of the inner wall of the sliding frame are connected with convex strips adapted to the side grooves, and a through groove is opened in the middle of both sides of the outer wall of the sliding frame, and a pointer pointing to the scale line is provided in the middle of the through groove. A positioning member for limiting the movement of the sliding frame is provided on the top of the sliding frame.

[0016] Preferably, the positioning member includes a second screw rod threadedly connected to the top of the sliding frame, the bottom end of the second screw rod is rotatably connected to a positioning plate in the sliding frame, and the top end of the second screw rod is connected to a second hand wheel.

[0017] A method for testing the load-bearing strength of a ton bag comprises the following steps:

[0018] S1, first move the movable base to the test position, open the blocking assembly and flip the first and second pressure plates to a horizontal position;

[0019] S2, measure the size of the pressure bag and adjust the fixed power arm assembly so that the horizontal length of the pressure bag corresponds to the fixed power arm assembly, and obtain the length L1 from the center of the fixed power arm to the hinge of the adjacent first pressure plate or second pressure plate;

[0020] S3, adjusting the sliding resistance arm assembly to move on the first pressing plate or the second pressing plate so that the distance between the sliding resistance arm assembly and the hinge of the adjacent first pressing plate or the second pressing plate is L2, and L1 ≥ 4L2;

[0021] S4, first place the load-bearing bag under the sliding resistance arm assembly, with the top of the load-bearing bag in contact with the bottom of the sliding resistance arm assembly, and then place the pressure bag on the fixed power arm assembly;

[0022] S5, timing and confirming that the contents of the load-bearing bag do not overflow from the bag body and are not damaged during the test time.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] The present invention provides a rotatable first pressure plate and a second pressure plate, and provides a fixed power arm assembly and a sliding resistance arm assembly on both the first pressure plate and the second pressure plate, a pressure bag is placed on the fixed power arm assembly, and a load-bearing bag is placed below the sliding resistance arm assembly, and both the pressure bag and the load-bearing bag are fully loaded ton bags. Therefore, in the load-bearing test of the ton bag, it is only necessary to slide and adjust the sliding resistance arm assembly on the first pressure plate or the second pressure plate, so that the pressure of the sliding resistance arm assembly when pressing the load-bearing bag down during the test can meet the test requirements, and there is no need to use the dead weight of four layers of fully loaded bags for testing. The test is simpler and more convenient, and the actual load-bearing pressure during the test can also be adjusted as needed to meet the use requirements of higher conditions, and the test has a wider range of application.

[0025] In addition, when placing the pressure bag on the fixed power arm assembly, the adaptable length of the fixed power arm assembly can be quickly adjusted according to the size of the pressure bag, so that it can adapt to the test of ton bags of different sizes;

[0026] Finally, through the blocking component, after the testing of the first pressure plate and the second pressure plate is completed, it is only necessary to rotate the first pressure plate and the second pressure plate upward, and then the blocking component limits the first pressure plate and the second pressure plate, so that the first pressure plate and the second pressure plate can be placed approximately vertically, reducing the occupied space when no testing is required, facilitating the overall rapid movement, and thus facilitating the transportation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of a ton bag load-bearing strength testing device proposed by the present invention;

[0028] Figure 2 This is a front view of a ton bag load-bearing strength testing device proposed by the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of a ton bag load-bearing strength testing device proposed by the present invention when it is stored;

[0030] Figure 4 This is a schematic diagram of the supporting bottom box structure of a ton bag load-bearing strength testing device proposed by the present invention;

[0031] Figure 5 This is a schematic diagram of the lifting outer frame structure of a ton bag load-bearing strength testing device proposed by the present invention;

[0032] Figure 6 This is a schematic diagram of the lifting inner plate structure of a ton bag load-bearing strength testing device proposed by the present invention;

[0033] Figure 7 This is a schematic structural diagram of the first pressing plate of a ton bag load-bearing strength testing device proposed by the present invention;

[0034] Figure 8 This is a schematic structural diagram of a sliding resistance arm assembly of a ton bag load-bearing strength testing device proposed by the present invention;

[0035] Figure 9 This is a front view of the sliding resistance arm assembly of a ton bag load-bearing strength testing device proposed by the present invention.

[0036] Figure: 1. Mobile base; 2. Supporting bottom box; 3. Lifting outer frame; 4. Lifting inner plate; 5. Lifting drive assembly; 6. First pressure plate; 7. Second pressure plate; 8. Fixed power arm assembly; 9. Sliding resistance arm assembly; 10. Pressure bag; 11. Load-bearing bag; 12. Block assembly; 201. Side opening; 202. Top opening; 203. Slide; 301. Lifting cylinder; 401. Connecting ear plate; 402. Screw hole; 51. Drive motor; 52. Lead screw; 53. Sliding rod; 601. Side groove; 602. Scale line; 603. Rotating shaft; 604. Groove; 81. First screw; 82. Sliding plate; 83. Fixed plate; 84. First handwheel; 91. Sliding frame; 92. Pressing block; 93. Diffuser plate; 94. Positioning member; 95. Pointer; 941. Second screw; 942. Positioning plate; 943. Second handwheel; 121. Mounting plate; 122. Drive shaft; 123. Baffle. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0039] In the test of the bearing strength of ton bags, the GB / T10454-1989 test standard is currently generally adopted, that is, the standard test for ton bags and other container bags. In the pressure test of the bearing strength of the above test standards, one is to place the fully loaded container bag on a pressurizing machine for a pressure test. The pressure applied by the pressurizing machine is four times the full load weight of the container bag. The other is to use a static load method, that is, the dead weight of four layers of fully loaded bags, and the pressurization time is more than eight hours. In this test, if the contents do not overflow and the bag body is not damaged, it means that the container bag has passed this test. However, the above two test methods have the problems of complex test methods and more troublesome tests during the test process.

[0040] Reference Figure 1-Figure 3 A load-bearing strength test device for ton bags includes a mobile base 1. The bottom surface of the mobile base 1 can be equipped with universal wheels to facilitate the movement of the mobile base 1, thereby facilitating the transportation before use, and quickly moving the device to the test area. A supporting bottom box 2 is fixed on the top surface of the mobile base 1, and a lifting outer frame 3 that can be lifted and lowered is installed in the supporting bottom box 2. The lifting outer frame 3 extends upward in the supporting bottom box 2 to preliminarily adjust the height of the ton bag when it is fully loaded during the test, that is, Figure 1-Figure 2 When the lifting bag 11 is lifted, the lifting plate 4 is lifted and lowered, and the lifting mechanism 3 is lifted and lowered, so that the lifting bag 11 can be lifted and lowered.

[0041] The first pressing plate 6 and the second pressing plate 7 are of the same size and structure. The first pressing plate 6 and the second pressing plate 7 are used at the same time. During the test, multiple groups of test experiments can be carried out at the same time, or control experiments can be carried out at the same time to improve the accuracy and efficiency of the ton bag test. The ends of the first pressing plate 6 and the second pressing plate 7 away from each other are provided with a fixed power arm assembly 8 for placing the pressure bag 10, and the ends of the first pressing plate 6 and the second pressing plate 7 close to each other are provided with a sliding resistance arm assembly 9 for pressing down the load-bearing bag 11. The sliding resistance arm assembly 9 slides horizontally along the length direction of the first pressing plate 6 and the second pressing plate 7, so that the pressure of the sliding resistance arm assembly 9 pressing down the load-bearing bag 11 is the weight of the pressure bag 10 itself. Multiples of force, here the pressure bag 10 and the load-bearing bag 11 are both fully loaded ton bags to ensure that their own weights are as similar as possible. At the same time, the load-bearing bag 11 is a test bag. At this time, the first pressure plate 6, the sliding resistance arm assembly 9, and the fixed power arm assembly 8 or the second pressure plate 7, the sliding resistance arm assembly 9, and the fixed power arm assembly 8 respectively constitute two labor-saving levers. When the pressure bag 10 is placed on the fixed power arm assembly 8, the self-gravity of the pressure bag 10 makes the resistance of the sliding resistance arm assembly 9 here greater, so that a pressure bag 10 (ton bag) can achieve a pressure many times its own gravity on the load-bearing bag 11 (another ton bag) to facilitate the rapid progress of the test experiment.

[0042] Reference Figure 3-Figure 4 In order to ensure the stability of the lifting outer frame 3 extending from the supporting bottom box 2, the top surface of the supporting bottom box 2 is provided with a top opening 202 for the lifting outer frame 3 to slide out, and both side surfaces of the supporting bottom box 2 are provided with side openings 201 connected to the top opening 202 and for the lifting inner plate 4 to slide. Both sides of one end of the top opening 202 are provided with sliding grooves 203 for the blocking assembly 12 to pass through.

[0043] At the same time, the four side surfaces of the lifting outer frame 3 are in contact with the inner walls of the top opening 202, and the middle ends of the lifting outer frame 3 have limit plates extending outward. The bottom surface of each limit plate is connected to a lifting cylinder 301 fixed in the supporting bottom box 2. Driven by the lifting cylinder 301, the lifting outer frame 3 extends upward from the supporting bottom box 2.

[0044] Reference Figure 3-Figure 5 The lifting drive assembly 5 includes a screw 52 installed in the middle of the lifting outer frame 3, slide rods 53 symmetrically arranged at both ends of the screw 52, ​​and a drive motor 51 installed on the top surface of the lifting outer frame 3. The drive motor 51 is a servo motor. The output shaft of the drive motor 51 is coaxially fixedly connected with the screw 52 to drive the screw 52 to rotate in the lifting outer frame 3. The lifting inner plate 4 is installed on the outside of the screw 52 and the two slide rods 53 to provide support and guidance for the lifting of the lifting inner plate 4.

[0045] Furthermore, in order to keep the first pressure plate 6 and the second pressure plate 7 stable after being turned upward, the blocking assembly 12 includes a mounting plate 121 fixed to the top of the outer side of the lifting outer frame 3, a driving shaft 122 provided at both ends of the mounting plate 121 and a baffle 123 fixedly sleeved on the ends of the two driving shafts 122, and a double-headed motor is provided inside the mounting plate 121, wherein the two output shafts of the double-headed motor are coaxially fixed to the two driving shafts 122 respectively, and the double-headed motor drives the two driving shafts 122 to rotate, thereby causing the two baffles 123 to rotate simultaneously, and the baffle 123 rotates to Figure 3 The state shown is that the first pressing plate 6 and the second pressing plate 7 are blocked.

[0046] Reference Figure 5-Figure 6 , connecting ear plates 401 are symmetrically fixed at both ends of the lifting inner plate 4, and one end of the first pressure plate 6 and the second pressure plate 7 are respectively hinged in the two sets of connecting ear plates 401, so that the first pressure plate 6 and the second pressure plate 7 rotate at the corresponding connecting ear plates 401 respectively, and a screw hole 402 adapted to the screw 52 is penetrated in the middle of the lifting inner plate 4, and sliding holes adapted to the sliding rod 53 are penetrated at both ends of the top surface of the lifting inner plate 4 to ensure that the lifting inner plate 4 slides up and down along the vertical height direction of the screw 52.

[0047] Reference Figure 7, the middle parts of the two symmetrical side surfaces of the first pressure plate 6 and the second pressure plate 7 are both provided with side grooves 601 inwardly, and scale lines 602 are provided above the side grooves 601. The setting of the scale lines 602 can more conveniently and quickly calculate the length of the fixed power arm assembly 8 to the fulcrum of the first pressure plate 6 or the second pressure plate 7, and the length of the sliding resistance arm assembly 9 to the fulcrum of the first pressure plate 6 or the second pressure plate 7. Both sides of the adjacent ends of the first pressure plate 6 and the second pressure plate 7 are fixedly connected with a rotating shaft 603 hinged to the connecting ear plate 401 to ensure the stability of the first pressure plate 6 and the second pressure plate 7 during rotation at the fulcrum. A groove 604 is provided on the top surface of the other end of the second pressure plate 7 and the second pressure plate 7. In order to use it when testing ton bags of different horizontal lengths, the fixed power arm assembly 8 includes a fixed plate 83 fixed to the top surface of one end away from the first pressure plate 6 and the second pressure plate 7, a sliding plate 82 arranged in the groove 604, and a first screw 81 arranged in the groove 604 and driving the sliding plate 82 to move. The bottom end of the sliding plate 82 fits in the groove 604 and is threadedly adapted to the first screw 81, so that the rotation of the first screw 81 can drive the movement of the sliding plate 82. The top of the sliding plate 82 is the same size as the fixed plate 83. The sliding plate 8 2 and the fixed plate 83, and the sliding plate 82 and the fixed plate 83 are both in contact with both sides of the pressure bag 10, limiting the pressure bag 10 between the two, so that the center of gravity of the pressure bag 10 is located at the midpoint between the sliding plate 82 and the fixed plate 83, and the distance from the pressure bag 10 to the fulcrum of the first pressing plate 6 or the second pressing plate 7 can be obtained, which is the power arm length L1. One end of the first screw 81 passes through the first pressing plate 6 or the second pressing plate 7 and is connected to the first hand wheel 84 to facilitate manual rotation of the first screw 81.

[0048] Reference Figure 7-Figure 8The sliding resistance arm assembly 9 includes a sliding frame 91 that slides on the outside of the first pressure plate 6 or the second pressure plate 7, a pressure block 92 fixed to the bottom of the sliding frame 91, and a diffusion plate 93 placed on the top surface of the load-bearing bag 11 and connected to the pressure plate. The bottom surface of the pressure block 92 is arc-shaped, and the bottom center of the pressure block 92 is the resistance point of the sliding resistance arm assembly 9. The distance between this point and the fulcrum of the first pressure plate 6 or the second pressure plate 7 is the resistance arm length L2. Four connecting ropes are connected between the pressure block 92 and the diffusion plate 93. When the four connecting ropes are naturally stretched under force, the pressure block 92 and the diffusion plate 93 are not in contact under normal circumstances, and the diffusion plate 93 remains horizontal under normal circumstances. After the load-bearing bag 11 is placed, the diffusion plate 93 It is located on the top of the load-bearing bag 11, and the diffusion plate 93 and the pressure block 92 are against each other. At this time, the pressure block 92 disperses the resistance to the entire diffusion plate 93, and the connecting rope is loose, so that when it is pressed down to the load-bearing bag 11, the load-bearing bag 11 is subjected to the force as evenly as possible. Both sides of the inner wall of the sliding frame 91 are connected with convex strips adapted to the side grooves 601 to ensure the stable horizontal sliding of the sliding frame 91. At the same time, in order to facilitate the reading of the position of the scale line 602 at the convex point at the bottom of the pressure block 92, a through groove is opened in the middle of both sides of the outer wall of the sliding frame 91, and a pointer 95 pointing to the scale line 602 is provided in the middle of the through groove. The pointer 95 vertically corresponds to the center of the bottom of the pressure block 92 (i.e. the convex point).

[0049] Furthermore, in order to ensure that the sliding frame 91 remains stable after movement, a positioning member 94 is provided at the top of the sliding frame 91 to limit the movement of the sliding frame 91. The positioning member 94 includes a second screw 941 threadedly connected to the top of the sliding frame 91. The bottom end of the second screw 941 is rotatably connected to a positioning plate 942 within the sliding frame 91. The bottom surface of the positioning plate 942 is provided with anti-slip grooves. The top end of the second screw 941 is connected to a second hand wheel 943. When the second hand wheel 943 rotates, it drives the second screw 941 to rotate, causing the positioning plate 942 to move downward and more tightly against the first pressure plate 6 or the second pressure plate 7, thereby limiting the position of the sliding frame 91.

[0050] Reference Figures 1-9 A method for testing the load-bearing strength of a ton bag comprises the following steps:

[0051] S1, first move the mobile base 1 to the test position, open the blocking assembly 12 and flip the first pressing plate 6 and the second pressing plate 7 to the horizontal position, that is, Figure 3 The status shown flips to Figure 1 state;

[0052] S2, measure the size of the pressure bag 10 and adjust the fixed power arm assembly 8 so that the horizontal length of the pressure bag 10 corresponds to the fixed power arm assembly 8, and obtain the length L1 from the center of the fixed power arm to the hinge of the adjacent first pressure plate 6 or second pressure plate 7;

[0053] S3, adjust the sliding resistance arm assembly 9 to move on the first pressure plate 6 or the second pressure plate 7 so that the distance between the sliding resistance arm assembly 9 and the hinge of the adjacent first pressure plate 6 or the second pressure plate 7 is L2, and L1 ≥ 4L2. According to the principle of leverage, power * power arm L1 = resistance * resistance arm L2. At this time, the power is provided by the gravity of the pressure bag 10, so the size of the resistance can be obtained, and then the downward pressure on the load-bearing bag 11 is determined based on the obtained resistance size;

[0054] S4, first place the load-bearing bag 11 under the sliding resistance arm assembly 9, and the top of the load-bearing bag 11 is in contact with the bottom of the sliding resistance arm assembly 9, and then place the pressure bag 10 on the fixed power arm assembly 8;

[0055] S5, timing and determining whether the contents of the load-bearing bag 11 do not overflow from the bag body and whether there is any damage within the test time.

[0056] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A ton bag load-bearing strength testing device, comprising a mobile base (1), characterized in that: A supporting bottom box (2) is fixedly provided on the top surface of the movable base (1), and a lifting outer frame (3) capable of lifting and lowering is installed in the supporting bottom box (2), a lifting inner plate (4) is provided in the lifting outer frame (3), and a lifting driving component (5) is installed on the lifting outer frame (3) for driving the lifting inner plate (4) to move up and down along the inner wall of the lifting outer frame (3), and the two ends of the lifting inner plate (4) are respectively hingedly connected to a first pressing plate (6) and a second pressing plate (7), and a blocking component (12) for limiting the flipping of the first pressing plate (6) and the second pressing plate (7) is installed on one side of the lifting outer frame (3); The first pressing plate (6) and the second pressing plate (7) are of the same size and structure. A fixed power arm assembly (8) for placing a pressure bag (10) is provided at the end of the first pressing plate (6) and the second pressing plate (7) away from each other. A sliding resistance arm assembly (9) for pressing down the load-bearing bag (11) is provided at the end of the first pressing plate (6) and the second pressing plate (7) close to each other. The sliding resistance arm assembly (9) slides horizontally along the length direction of the first pressing plate (6) and the second pressing plate (7), so that the pressure of the sliding resistance arm assembly (9) pressing down the load-bearing bag (11) is a multiple of the weight of the pressure bag (10) itself. Both the pressure bag (10) and the load-bearing bag (11) are fully loaded ton bags. The top surface of the supporting bottom box (2) is provided with a top opening (202) for the lifting outer frame (3) to slide through, and both side surfaces of the supporting bottom box (2) are provided with side openings (201) connected to the top opening (202) and for the lifting inner plate (4) to slide, and both sides of one end of the top opening (202) are provided with sliding grooves (203) for the blocking component (12) to pass through, and the four side surfaces of the lifting outer frame (3) are all in contact with the inner wall of the top opening (202), and both ends of the middle part of the lifting outer frame (3) are provided with limit plates extending outward, and the bottom surface of each limit plate is connected to a lifting cylinder (301) fixed in the supporting bottom box (2); The lifting drive assembly (5) includes a lead screw (52) installed in the middle of the lifting outer frame (3), slide rods (53) symmetrically arranged at both ends of the lead screw (52), and a drive motor (51) installed on the top surface of the lifting outer frame (3), the output shaft of the drive motor (51) is coaxially fixedly connected to the lead screw (52), and the lifting inner plate (4) is installed on the outside of the lead screw (52) and the two slide rods (53); The blocking assembly (12) includes a mounting plate (121) fixed to the top of the outer side surface of the lifting outer frame (3), a driving shaft (122) provided at both ends of the mounting plate (121), and a baffle (123) fixedly sleeved on the ends of the two driving shafts (122); a double-headed motor is provided inside the mounting plate (121), wherein the two output shafts of the double-headed motor are coaxially fixed to the two driving shafts (122) respectively; The middle portions of the two symmetrical side surfaces of the first pressing plate (6) and the second pressing plate (7) are both provided with side grooves (601) inwardly, and scale lines (602) are provided above the side grooves (601), and the top surfaces of the second pressing plate (7) and the other end of the second pressing plate (7) are provided with grooves (604); The fixed power arm assembly (8) includes a fixed plate (83) fixed to the top surface of one end away from the first pressing plate (6) and the second pressing plate (7), a sliding plate (82) arranged in the groove (604), and a first screw (81) arranged in the groove (604) and driving the sliding plate (82) to move, the bottom end of the sliding plate (82) fits in the groove (604) and is thread-matched with the first screw (81), the top end of the sliding plate (82) is the same size as the fixed plate (83), and one end of the first screw (81) passes through the first pressing plate (6) or the second pressing plate (7) and is connected to the first hand wheel (84); The sliding resistance arm assembly (9) includes a sliding frame (91) that is slidably sleeved on the outside of the first pressure plate (6) or the second pressure plate (7), a pressure block (92) fixed to the bottom surface of the sliding frame (91), and a diffusion plate (93) placed on the top surface of the load-bearing bag (11) and connected to the pressure plate. The bottom surface of the pressure block (92) is arc-shaped, and four connecting ropes are connected between the pressure block (92) and the diffusion plate (93). Both sides of the inner wall of the sliding frame (91) are connected with convex strips that are adapted to the side grooves (601). A through groove is opened in the middle of both sides of the outer wall of the sliding frame (91), and a pointer (95) pointing to the scale line (602) is provided in the middle of the through groove. A positioning member (94) that limits the movement of the sliding frame (91) is provided on the top of the sliding frame (91).

2. A ton bag load-bearing strength testing device according to claim 1, characterized in that: Connecting ear plates (401) are symmetrically fixed at both ends of the lifting inner plate (4), one end of the first pressing plate (6) and the second pressing plate (7) are respectively hinged in the two sets of connecting ear plates (401), a screw hole (402) adapted to the lead screw (52) is passed through the middle of the lifting inner plate (4), and sliding holes adapted to the sliding rod (53) are passed through both ends of the top surface of the lifting inner plate (4).

3. A ton bag load-bearing strength testing device according to claim 2, characterized in that: Both sides of the adjacent ends of the first pressing plate (6) and the second pressing plate (7) are fixedly connected to a rotating shaft (603) hinged to the connecting ear plate (401).

4. A ton bag load-bearing strength testing device according to claim 3, characterized in that: The positioning member (94) includes a second screw rod (941) threadedly connected to the top of the sliding frame (91), the bottom end of the second screw rod (941) is rotatably connected to a positioning plate (942) in the sliding frame (91), and the top end of the second screw rod (941) is connected to a second hand wheel (943).

5. A method for testing the load-bearing strength of a ton bag, using a ton bag load-bearing strength testing device according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1, first move the movable base (1) to the test position, open the blocking assembly (12) and flip the first pressing plate (6) and the second pressing plate (7) to a horizontal position; S2, measuring the size of the pressure bag (10), and adjusting the fixed power arm assembly (8) so that the horizontal length of the pressure bag (10) corresponds to the fixed power arm assembly (8), and obtaining the length L1 from the center of the fixed power arm to the hinge of the adjacent first pressure plate (6) or second pressure plate (7); S3, adjusting the sliding resistance arm assembly (9) to move on the first pressing plate (6) or the second pressing plate (7), so that the distance between the sliding resistance arm assembly (9) and the hinge of the adjacent first pressing plate (6) or the second pressing plate (7) is L2, and L1 ≥ 4L2; S4, first place the load-bearing bag (11) under the sliding resistance arm assembly (9), and the top of the load-bearing bag (11) is in contact with the bottom of the sliding resistance arm assembly (9), and then place the pressure bag (10) on the fixed power arm assembly (8); S5, timing and determining whether the contents of the load-bearing bag (11) do not overflow from the bag body and whether there is any damage during the test time.

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