A ton bag load bearing strength testing device

Abstract

The application discloses a kind of ton bag load-bearing strength testing device, belong to ton bag testing technical field, the testing device includes rack, hoisting piece, down press, aggregate mechanism.The rack inside top is provided with hoisting support, the hoisting support is provided with pressure disc directly below, the top and bottom of the pressure disc is set as hard contact area, the side of the pressure disc is set as expansion area, the expansion area is configured to expand outward to increase its contact area between filler.The application increases the contact area between the bottom of the pressure disc and the filler surface inside ton bag by the expansion area of the side of the pressure disc when down press, increases the uniformity of its pressure distribution to the filler inside ton bag.And the cavity and air cavity inside the bottom of the piston are through, after the down press of pressure disc is removed, the piston can also reduce its area by the reset of expansion area, facilitate the in-out operation of pressure disc at ton bag mouth.

Description

Technical Field

[0001] This invention relates to the field of ton bag testing technology, and in particular to a device for testing the load-bearing strength of ton bags. Background Technology

[0002] BOOM (Monthly Intermediate Bulk Container) bags, also known as bulk bags, flexible containers, or ton bags, are a type of flexible transport packaging container, belonging to the category of medium-sized bulk containers. They offer advantages such as moisture resistance, dust resistance, radiation resistance, and robust safety, and possess sufficient structural strength. In testing the load-bearing capacity of BOOM bags, they must first meet the usage standards. The pressure test for load-bearing capacity involves placing a fully loaded BOOM bag on a pressurizing machine, applying a pressure four times the bag's full load weight. A testing device is required for conducting the load-bearing capacity test of BOOM bags.

[0003] Currently, the load-bearing strength testing device for ton bags uses a circular pressure plate. After the ton bag is filled with filler, the pressure plate presses down on the surface of the filler, applying downward pressure. Simultaneously, the squeezing and flow between the filler particles allows the filler to transmit compressive force in different directions, such as the sides and bottom of the ton bag. However, the contact area between the pressure plate and the filler is fixed and limited. The ton bag opening lacks outward expansion support, resulting in a relatively small opening size. To ensure smooth contact between the pressure plate and the filler, a large gap is left between the pressure plate and the inner sidewall of the bag, making it easy for the filler to be squeezed out of the bag. Furthermore, the poor contact and encapsulation between the pressure plate and the surface of the filler during pressing down hinders the transmission of compressive force in all directions. Summary of the Invention

[0004] This invention provides a ton bag load-bearing strength testing device to solve the defects in the prior art where the surface contact and wrapping of the pressure plate and the packing material inside the belt are poor, which is not conducive to the packing material transmitting extrusion in all directions.

[0005] This invention provides a device for testing the load-bearing strength of ton bags, comprising: The lifting component includes a liftable lifting bracket with multiple hooks at the bottom, the distance between which is adjustable; the pressing component includes a liftable pressure plate located at the bottom of the lifting bracket, the top and bottom of which are hard contact areas, an air chamber inside the pressure plate, a telescopic rod fixedly connected to the top of the pressure plate passing through the center of the lifting bracket, and a deformable expansion area on the side edge of the pressure plate; the collecting mechanism includes a load-bearing grid located directly below the pressure plate, with a collection hopper at the bottom of the load-bearing grid; wherein, the pressing component is configured such that when the pressure plate presses down on the surface of the filler inside the ton bag, the expansion area expands outward to increase its contact area with the filler.

[0006] In a further embodiment, when the pressure plate rises, the hard contact area at its top carries the lifting bracket up with it.

[0007] In a further embodiment, the ton bag load-bearing strength testing device also includes a frame, and each of the uprights of the frame is provided with a sliding sleeve. The four ends of the lifting bracket are respectively connected to the sliding sleeve. When the pressure plate descends, the lifting bracket is positioned on the frame by the sliding sleeve.

[0008] In a further embodiment, the telescopic rod has a cavity at its bottom, a return spring is provided at the top of the cavity, and a piston that matches the cavity is connected to the bottom of the return spring. The cavity area at the bottom of the piston communicates with the air cavity.

[0009] In a further embodiment, the collecting mechanism includes baffles disposed around the top of the load-bearing grid, the baffles being detachably connected to the columns of the frame.

[0010] In a further embodiment, a conveying mechanism is provided at the bottom of the hopper, and a material box is provided at the top of the frame. The conveying mechanism is configured to transport the filler in the ton bag upwards back into the material box after it falls into the hopper.

[0011] In a further embodiment, the inclination angle of the sidewall of the hopper is at least 45°, the inner wall of the hopper is provided with a buffer layer, and the side of the buffer layer away from the hopper is provided with a drag-reducing layer.

[0012] In a further embodiment, the drag-reducing layer comprises a Teflon coating.

[0013] The present invention provides a ton bag load-bearing strength testing device, which has the following technical effects or advantages: The expansion area on the side of the pressure plate and the internal air chamber increase the contact area between the bottom of the pressure plate and the surface of the packing material inside the ton bag when the pressure plate is pressed down, thus increasing the uniformity of pressure distribution on the packing material. Furthermore, the cavity at the bottom of the piston and the internal air chamber are interconnected. After the pressure plate is removed, the piston can reduce its area by resetting through the expansion area, facilitating the insertion and removal of the pressure plate at the ton bag opening. This ensures that the bottom of the pressure plate and the surface of the packing material inside the ton bag are fully covered when the pressure plate is pressed down, reducing the risk of the packing material being squeezed out from the contact gaps during pressure application. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1This is a three-dimensional schematic diagram of a ton bag load-bearing strength testing device provided in an embodiment of the present invention. Figure 1 ; Figure 2 This is a three-dimensional schematic diagram of the ton bag load-bearing strength testing device according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a three-dimensional schematic diagram of the ton bag load-bearing strength testing device according to an embodiment of the present invention. Figure 3 ; Figure 4 This is a schematic cross-sectional view of the internal structure of the ton bag load-bearing strength testing device according to an embodiment of the present invention; Figure 5 This is a three-dimensional enlarged schematic diagram of the pressing component in the ton bag load-bearing strength testing device according to an embodiment of the present invention; Figure 6 This is an enlarged cross-sectional view of the internal structure of the pressure plate in the ton bag load-bearing strength testing device of this invention.

[0016] Figure label: 1. Lifting components; 101. Lifting bracket; 102. Hook; 2. Pressing components; 201. Pressure plate; 202. Hard contact area; 203. Air cavity; 204. Telescopic rod; 205. Expansion area; 3. Material collection mechanism; 301. Load-bearing grid; 302. Material collection hopper; 303. Baffle; 4. Frame; 5. Sliding sleeve; 6. Cavity; 7. Return spring; 8. Piston; 9. Material conveying mechanism; 10. Material box. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0018] As mentioned earlier, existing ton bag load-bearing strength testing devices use a circular pressure plate. After the ton bag is filled with filler, the pressure plate presses down on the surface of the filler, applying downward pressure. Simultaneously, the squeezing and flow between the filler particles allows the filler to transmit compressive force in different directions, such as the sides and bottom of the ton bag. However, the contact area between the pressure plate and the filler is fixed and limited. The ton bag opening lacks outward expansion support, resulting in a relatively small opening size. To ensure smooth contact between the pressure plate and the filler, a large gap is left between the pressure plate and the inner sidewall of the bag, making it easy for the filler to be squeezed out of the bag. Furthermore, the poor contact and encapsulation between the pressure plate and the surface of the filler during pressing down hinders the transmission of compressive force in all directions.

[0019] To address this issue, the present invention provides a ton bag load-bearing strength testing device. This device increases the contact area between the bottom of the pressure plate 201 and the surface of the packing material inside the ton bag when the pressure plate 201 is pressed down, through the expansion area 205 on the side of the pressure plate 201 and the internal air cavity 203, thereby increasing the uniformity of pressure distribution on the packing material inside the ton bag. Furthermore, the cavity 6 at the bottom of the piston 8 is connected to the interior of the air cavity 203. After the pressure plate 201 is removed, the piston 8 can reduce its area by resetting the expansion area 205, facilitating the insertion and removal of the pressure plate 201 at the ton bag opening.

[0020] The load-bearing grid 301 at the bottom of the frame 4 facilitates the collection of the filling material inside the ton bag after it breaks, allowing it to fall into the bottom hopper 302. This facilitates the reuse of the filling material and prevents the ton bag from breaking instantly and the filling material from scattering everywhere, which would cause chaos in the subsequent testing environment and make collection difficult.

[0021] The following is combined Figures 1-6 This invention is described in detail.

[0022] like Figures 1-6 As shown, this invention provides a ton bag testing device, particularly a ton bag load-bearing strength testing device. In this embodiment, the testing device mainly includes a lifting component 1, a pressing component 2, a material collecting mechanism 3, a frame 4, and a conveying mechanism 9. A cylinder is installed at the top outer surface of the frame 4, and a telescopic rod at the bottom of the cylinder passes through the top of the frame 4 and extends into the interior of the frame 4. The lifting component 1 includes a cross-shaped lifting bracket 101 installed inside the frame 4. Multiple sliding hooks 102 are provided at the bottom of the lifting bracket 101. The distance between the hooks 102 can be adjusted after sliding at the bottom of the lifting bracket 101, facilitating the hanging of the top strap of the ton bag. Figures 1-3 As shown, the frame 4 can be made of four columns. A sliding sleeve 5 is provided near the top of each column. One end of the sliding sleeve 5 near the inside of the frame 4 is connected to the four ends of the hoisting bracket 101. When the hoisting bracket 101 is lowered to a certain position, the sliding sleeve 5 on the column provides positioning support for the hoisting bracket 101.

[0023] The lower pressing component 2 includes a pressing plate 201 located directly below the lifting bracket 101. The pressing plate 201 is liftable and has a spliced ​​structure. The top and bottom of the pressing plate 201 form a rigid hard contact area 202, which can be made of materials such as cast iron or stainless steel and is not easily deformed. The side edges of the pressing plate 201 form an expandable and deformable expansion area 205. A telescopic rod 204 is connected to the top of the pressing plate 201, serving as the telescopic end of the external top cylinder of the frame 4. When the pressing plate 201 rises until the hard contact area 202 at the top of the pressing plate 201 contacts the bottom of the lifting bracket 101, the pressing plate 201 rises along with the lifting bracket 101, and the ton bag hanging at the bottom of the lifting bracket 101 can be lifted together. As the pressure plate 201 descends, the lifting bracket 101 is positioned and supported by the sliding sleeve 5 on the column of the frame 4. The pressure plate 201 continues to move downward, and the hard contact area 202 at the top of the pressure plate 201 separates from the bottom of the lifting bracket 101 until the hard contact area at the bottom of the pressure plate 201 and the surface of the filler inside the ton bag generate the required downward pressure.

[0024] To facilitate the detection of lateral pressure on the ton bags and the lateral pressure after stacking, a support strap for the bottom of the ton bag can be attached to the hook 102 at the bottom of the lifting bracket 101. To increase the contact area between the pressure plate 201 and the surface of the filling material inside the ton bag after the pressure plate 201 presses down, the expansion area 205 on the side of the pressure plate 201 expands outwards during the pressing process. To further increase the lateral expansion capacity, an air chamber 203 is opened inside the pressure plate 201. A cavity 6, which communicates with the air chamber 203, is opened at the bottom of the telescopic rod 204. A return spring 7 is connected to the top of the cavity 6. At the same time, a piston 8 is set inside the cavity 6. The top of the piston 8 is connected to the return spring 7. By raising and lowering the piston 8, the space in the cavity 6 at the bottom of the piston 8 can accommodate the gas inside the cavity 203 when the pressure plate 201 is squeezed. After the pressure plate 201 is released from the squeezed state, the return spring 7 rebounds and presses the piston 8 down, and the gas inside the cavity 6 is back filled into the cavity 203, restoring the interior of the pressure plate 201.

[0025] To facilitate the recovery and recycling of the internal filler material after ton bag breakage during testing, a material collection mechanism 3 is installed at the bottom of the frame 4. The material collection mechanism 3 includes a load-bearing grid 301 mounted on the frame 4, directly below the pressure plate 201, with a spacing of 30mm. An inverted conical hopper 302 is located at the bottom of the load-bearing grid 301. The sidewall inclination of the hopper 302 is at least 45°. For fine powdery test filler, the inclination of the hopper 302 needs to be 60°. A buffer layer covers the inner wall of the hopper 302. This buffer layer reduces the impact of the internal filler material falling onto the inner wall of the hopper 302 when the ton bag breaks, thus extending the service life of the hopper 302. Furthermore, in order to reduce the material buildup caused by the packing material sticking to the inner wall of the hopper 302, a drag-reducing layer is provided on the side of the buffer layer away from the hopper 302. The drag-reducing layer can be a Teflon coating to increase the smoothness of the inner wall of the hopper 302.

[0026] like Figure 2 As shown, a material pipe is connected to the bottom of the material collection hopper 302, and a conveying mechanism 9 is provided at the end of the material pipe. The conveying mechanism 9 conveys the filler material that falls into the material collection hopper 302 to the other end. The conveying mechanism 9 includes a screw rod, which can push the filler material by rotation, and can also blow the filler material by air pump. A material box 10 is also provided at the top of the frame 4. A conveying hose is connected to the side of the material box 10. The conveying mechanism 9 collects the filler material collected in the material collection hopper 302 and conveys it upward. After the ton bag is broken, the material filled in the material collection hopper 302 is conveyed by the conveying mechanism 9 along the pipeline to the material box 10 at the top of the frame 4. Then, through the hose connected to the side of the material box 10, the material conveyed back into the material box 10 is conveyed back into the new ton bag to be tested.

[0027] Furthermore, in order to reduce the irregular scattering of the internal filler to the outside of the frame 4 when the ton bag breaks, baffles 303 are installed around the top of the load-bearing grid 301. The baffles 303 are detachably connected to the columns of the frame 4. The baffles 303 prevent the filler from scattering to the outside of the load-bearing grid 301 when the ton bag breaks, and help the filler to gather inside the collection hopper 302.

[0028] Install the straps of the ton bag onto the four hooks 102 at the bottom of the lifting bracket 101. Adjust the hooks 102 to a suitable distance, and inject a preset amount of filler into the ton bag through the hose on the side of the material box 10. Lift the pressure plate 201, which, along with the lifting bracket 101, rises together, lifting the ton bag containing the filler. If the ton bag breaks during the lifting process, the filler inside falls through the load-bearing grid 301 into the material collection hopper 302, and is then transported back to the upper material box 10 via the conveying mechanism 9. If the ton bag is undamaged, place a pull strap at the bottom of the ton bag. After removing the pull strap at the top of the ton bag, install the end of the pull strap used to support the bottom of the ton bag on the hook 102. After adjusting the distance of the hook 102, press down the pressure plate 201 until the air chamber 203 inside the pressure plate 201 shrinks and the expansion area 205 on the side of the pressure plate 201 expands, increasing the contact area between the edge of the pressure plate 201 and the packing inside the ton bag, until the ton bag ruptures. Record the test multiple of the pressure when the ton bag ruptures.

[0029] In summary, the ton bag load-bearing strength testing device of the present invention has the following advantages: First, the expansion area 205 on the side of the pressure plate 201 and the internal air chamber 203 increase the contact area between the bottom of the pressure plate 201 and the surface of the packing inside the ton bag when the pressure plate 201 is pressed down, thereby increasing the uniformity of the pressure distribution on the packing inside the ton bag. Furthermore, the cavity 6 at the bottom of the piston 8 is connected to the interior of the air chamber 203. After the pressure plate 201 is removed, the piston 8 can reduce its area by resetting the expansion area 205, facilitating the entry and exit of the pressure plate 201 at the ton bag opening.

[0030] Second, the load-bearing grid 301 at the bottom of the frame 4 facilitates the collection of the filling material inside the ton bag after it breaks, allowing it to fall into the bottom hopper 302. This facilitates the reuse of the filling material inside the ton bag and avoids the chaos and collection difficulties caused by the instantaneous breakage of the ton bag and the scattering of the filling material.

[0031] In the description of this invention, it should be noted that the terms "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "installed," "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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ton bag bagged load strength testing device characterized by, include: The lifting component (1) includes a liftable lifting bracket (101), the bottom of which is provided with multiple hooks (102), the distance between the hooks (102) is adjustable; The lower pressure component (2) includes a pressure plate (201) that can be raised and lowered at the bottom of the hoisting bracket (101). The top and bottom of the pressure plate (201) are both hard contact areas (202). An air cavity (203) is provided inside the pressure plate (201). A telescopic rod (204) that passes through the center of the hoisting bracket (101) is fixedly connected to the top of the pressure plate (201). The side edge of the pressure plate (201) is a deformable expansion area (205). The material collection mechanism (3) includes a load-bearing grid (301) located directly below the pressure plate (201), and a material collection hopper (302) is provided at the bottom of the load-bearing grid (301). Wherein, when the pressing member (2) is configured such that the pressing plate (201) presses down on the surface of the filler inside the ton bag, the expansion area (205) is forced to expand outward, increasing its contact area with the filler.

2. The ton bag burst strength testing apparatus of claim 1, wherein, When the pressure plate (201) rises, its top hard contact area (202) carries the hoisting bracket (101) up with it.

3. The ton bag burst strength testing apparatus of claim 1, wherein, The ton bag load-bearing strength testing device also includes a frame (4), and each column of the frame (4) is provided with a sliding sleeve (5). The four ends of the hoisting bracket (101) are respectively connected to the sliding sleeve (5). When the pressure plate (201) descends, the hoisting bracket (101) is positioned on the frame (4) by the sliding sleeve (5).

4. The ton bag burst strength testing apparatus of claim 1, wherein, The telescopic rod (204) has a cavity (6) at its bottom. A return spring (7) is provided at the top of the cavity (6). A piston (8) that matches the cavity (6) is connected to the bottom of the return spring (7). The cavity (6) area at the bottom of the piston (8) communicates with the air chamber (203).

5. The ton bag burst strength testing apparatus of claim 1, wherein, The material collection mechanism (3) includes baffles (303) disposed around the top of the load-bearing grid (301), and the baffles (303) and the columns of the frame (4) are detachably connected.

6. The ton bag burst strength testing apparatus of claim 5, wherein, The bottom of the hopper (302) is provided with a conveying mechanism (9), and the top of the frame (4) is provided with a material box (10). The conveying mechanism (9) is configured to transport the filler in the ton bag upwards to the inside of the material box (10) after it falls into the hopper (302).

7. The ton bag burst strength testing apparatus of claim 6, wherein, The inclination angle of the side wall of the material collection hopper (302) is at least 45°, and the inner wall of the material collection hopper (302) is provided with a buffer layer, and the side of the buffer layer away from the material collection hopper (302) is provided with a drag-reducing layer.

8. The ton bag burst strength testing apparatus of claim 7, wherein, The drag-reducing layer includes a Teflon coating.

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