Honeycomb paper sleeve strength testing device

Abstract

The invention relates to the technical field of honeycomb paper sleeve strength testing, in particular to a honeycomb paper sleeve strength testing device which comprises a testing machine, a piece cutting pressure testing mechanism arranged on the testing machine, a paper surface pressurizing mechanism arranged on the piece cutting pressure testing mechanism and a liquid injection assembly arranged in the piece cutting pressure testing mechanism. The testing machine is used for providing an effective pressure bearing platform for the cut sheet pressure measuring mechanism; the section pressure measuring mechanism comprises a pressure supply pushing piece and a pressure bearing end. According to the present invention, the material cutting and pressure applying assembly is arranged on the stamping part of the existing flat pressing strength detector, such that after the material cutting and pressure applying assembly is pressed and is pushed downwards, the real pressure borne by the cut paper sample can be measured in real time by the honeycomb paper under the cooperation of the pressure sensor; according to the cut paper sample, factors such as solution, steam and the like are transferred through the material cutting and pressure applying assembly, so that the compressive strength of the paper sample can be detected, and the tear resistance of the pressed paper sample in different media can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of honeycomb paper cover strength testing, in particular to a honeycomb paper cover strength testing device. Background Art

[0002] Honeycomb paper is a special paperboard made according to the honeycomb principle. It is made by connecting corrugated paper into countless hollow three-dimensional regular hexagons with glue to form an integral paper core, and gluing surface paper on both sides to form a new type of sandwich structure environmentally friendly and energy-saving material. In order to ensure whether the honeycomb paper is made in compliance with regulations, it is necessary to test its strength.

[0003] At present, honeycomb paper needs to undergo FCT (flat compression strength) testing after it is manufactured. This test requires the use of a flat compression strength tester to perform flat compression testing on the cut paper sample. The existing flat compression strength tester requires the use of hydraulic equipment to apply pressure to the clamped paper sample until the paper sample breaks. However, this test is only a tearing test, and it is difficult to detect the honeycomb paper's resistance to dissolution and cracking in different environmental factors after being compressed.

[0004] In view of this, a honeycomb paper cover strength testing device was designed to solve the above problems. Summary of the invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0006] To this end, the technical solution adopted in the present invention is: A honeycomb paper cover strength testing device comprises a testing machine, a cut piece pressure measuring mechanism arranged on the testing machine, a paper surface pressure boosting mechanism arranged on the cut piece pressure measuring mechanism and a liquid injection assembly arranged in the cut piece pressure measuring mechanism; the testing machine is used to provide an effective pressure-bearing platform for the cut piece pressure measuring mechanism; the cut piece pressure measuring mechanism comprises a pressure supply propulsion member and a pressure-bearing end head, a groove is provided inside the pressure-bearing end head, and a control body is arranged in the groove, and two optical lenses are arranged inside the control body; the paper surface pressure boosting mechanism comprises a cut material pressure assembly arranged between the pressure supply propulsion member and the pressure-bearing end head and two groups of dripping pressure relief assemblies arranged on the cut material pressure assembly; the liquid injection assembly is used to provide a transfer platform for different media to be tested.

[0007] In a preferred example, the present invention can be further configured as follows: the slice pressure measuring mechanism also includes a base arranged on the top of the testing machine, the top of the base is provided with a fan-shaped notch, and two symmetrically distributed dry air fans are arranged in the fan-shaped notch; Symmetrically distributed plug holes are provided on both sides of the pressure-bearing end head, and the air ducts of the two drying fans are respectively passed through the two plug holes and are used to perform drying operations on the partitioned space after detection.

[0008] In a preferred example, the present invention can be further configured as follows: the paper surface pressurization mechanism further includes a top plate arranged on the base, and a shield is arranged at the bottom of the top plate; Two slide grooves are provided in the shield, and stabilization pads are movably installed inside the slide grooves; The stabilizing pad is composed of a rectangular ring and two fan-shaped inserts, and the top of the top fan-shaped insert is adapted to penetrate into the slot inside the top plate; The two groups of stabilizing pads are used to provide effective stabilizing protection for the lifting and lowering of the material cutting and pressing assembly.

[0009] In a preferred example, the present invention can be further configured as follows: the material cutting and pressurizing assembly includes a punch installed at the bottom end of the hydraulic sub-rod in the pressure supply and pushing member; Two vertical holes are opened inside the punch, and two liquid inlet pipes are installed outside the punch, and the inner cavities of the liquid inlet pipes are connected to the vertical holes; A drip tube is arranged in the vertical hole, a gasket is arranged on the top of the vertical hole, a compression spring is installed at the bottom of the gasket, and the bottom end of the compression spring is under pressure on the drip tube. A cable is installed on the drip tube, and the other end of the cable passes through the vertical hole to the outside of the punch.

[0010] In a preferred example, the present invention can be further configured as follows: the punch is in a T-shaped structure as a whole, and a screw hole is provided in the end of the punch, and a second bolt is provided in the screw hole; The second bolt is used to fix the tensioning backstay.

[0011] In a preferred example, the present invention can be further configured as follows: the dripping pressure release assembly includes a main partition and a secondary partition arranged on the punch, and a winding roller movably installed between the main partition and the secondary partition; The other end of the cable is wound around a winding roller; A pad is arranged outside the auxiliary partition, and a torsion spring is installed between the pad and the winding roller.

[0012] In a preferred example, the present invention can be further configured as follows: the liquid injection assembly includes a base; Two pre-installed sockets are provided inside the base, and liquid storage tanks are provided in the pre-installed sockets; Two flow guide pipes are arranged inside the base.

[0013] In a preferred example, the present invention can be further configured as follows: the flow guide tube is composed of an input end, a hose and an output end; The input end is arranged in the pre-installed socket, and the output end is installed on the liquid inlet pipe.

[0014] In a preferred example, the present invention can be further configured as follows: a force arm is provided on the top of the base, a transverse groove is provided on the top of the force arm, and a threaded hole is provided inside the transverse groove; A first bolt disposed in the threaded hole In a preferred example, the present invention can be further configured as follows: the slice pressure measuring mechanism further includes two springs and a gasket disposed on top of the two springs; The gasket is arranged in a groove inside the pressure-bearing end head; The two springs are arranged in two holes inside the control body.

[0015] By adopting the above technical solution, the beneficial effects achieved by the present invention are: 1. The present invention arranges a material cutting pressure component on the stamping part of the existing flat compression strength tester. When the material cutting pressure component is pressed and pushed downward, the honeycomb paper can measure the actual pressure of the paper sample cut in real time with the cooperation of the pressure sensor. At the same time, the cut paper sample transfers factors such as solution and steam through the material cutting pressure component, so that the compressive strength of the paper sample can be tested, and its tear resistance in different media after being compressed can be tested.

[0016] 2. The present invention provides a groove adapted to the bottom end of the punch in the pressure-bearing end at the top of the detector. When the paper sample is cut and encapsulated between the punch and the control body, the cut paper sample can form two test partitions after being compressed. As the injection component transfers the selected medium to the two partitions, the paper sample can simulate the damage progress in different media after being compressed and fractured, thereby improving the change in the compressive strength of the honeycomb paper after being compressed to a flat state.

[0017] 3. The present invention arranges two optical lenses at the bottom of two partitions of the paper sample, and controls the pressure strength of two droppers on the two partitions of the paper sample. When the droppers do not apply pressure to the paper surface in the partitions, the optical lenses can detect the resistance of the flattened honeycomb paper to solution penetration in real time. When the droppers apply pressure to the paper surface in the partitions, the secondary strength measurement of the paper sample after the solution penetration can be performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the present invention when used; Figure 2 It is a partial schematic diagram of the present invention; Figure 3 It is a schematic diagram of the slice pressure measuring mechanism of the present invention; Figure 4 For the present invention Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 is a schematic diagram of a liquid injection assembly of the present invention; Figure 6is a cross-sectional schematic diagram of the top plate of the present invention; Figure 7 It is an exploded schematic diagram of the paper pressurization mechanism of the present invention; Figure 8 It is a schematic diagram of the material cutting pressure applying component and the liquid dripping pressure releasing component of the present invention; Fig. 9 For the present invention Figure 8 The enlarged schematic diagram of point B in the middle; Fig.10 It is a bottom view schematically showing the material cutting and pressurizing assembly of the present invention.

[0019] Reference numerals: 100. Testing machine; 200, slice pressure measuring mechanism; 210, base; 220, first bolt; 230, pressure supply pusher; 240, pressure bearing end; 250, dry air control fan; 260, control body; 270, optical lens; 280, spring; 290, gasket; 300, paper surface pressure boosting mechanism; 310, top plate; 320, shield; 330, slide; 340, stabilizing pad; 350, material cutting pressure assembly; 351, punch; 352, liquid inlet pipe; 353, gasket; 354, liquid dripping pipe; 355, compression spring; 356, cable; 357, second bolt; 360, liquid dripping pressure relief assembly; 361, main partition; 362, auxiliary partition; 363, pad foot; 364, torsion spring; 365, winding roller; 400, liquid injection assembly; 410, base; 420, liquid storage tank; 430, flow guide pipe. DETAILED DESCRIPTION

[0020] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0021] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0022] A honeycomb paper cover strength testing device provided by some embodiments of the present invention will be described below with reference to the accompanying drawings.

[0023] Embodiment 1: Combination Figure 1-Figure 10As shown, a honeycomb paper cover strength testing device provided by the present invention includes a testing machine 100, a slice pressure measuring mechanism 200 arranged on the testing machine 100, a paper surface pressure boosting mechanism 300 arranged on the slice pressure measuring mechanism 200, and a liquid injection component 400 arranged in the slice pressure measuring mechanism 200. The testing machine 100 is used to provide an effective pressure-bearing platform for the slice pressure measuring mechanism 200, the slice pressure measuring mechanism 200 is used to hold the honeycomb paper cover and provide a flat testing platform for it, the paper surface pressure boosting mechanism 300 is used to perform compression resistance testing on the honeycomb paper sample and provide a partition test for the paper sample, and the liquid injection component 400 is used to provide a transfer platform for different media to be tested.

[0024] The slice pressure measuring mechanism 200 includes a pressure supplying propulsion member 230 and a pressure bearing end head 240. A groove is provided inside the pressure bearing end head 240, and a control body 260 is provided inside the groove. Two optical lenses 270 are provided inside the control body 260. The paper surface pressurizing mechanism 300 includes a material cutting and pressurizing assembly 350 disposed between the pressure supplying and pushing member 230 and the pressure bearing end head 240 and two sets of dripping and pressure releasing assemblies 360 disposed on the material cutting and pressurizing assembly 350; The material cutting and pressing assembly 350 includes a punch 351 installed at the bottom end of the hydraulic sub-rod in the pressure supply pusher 230; Two vertical holes are formed inside the punch 351, and two liquid inlet pipes 352 are installed outside the punch 351, and the inner cavities of the liquid inlet pipes 352 are connected to the vertical holes; A drip tube 354 is arranged in the vertical hole, a gasket 353 is arranged at the top of the vertical hole, a compression spring 355 is installed at the bottom of the gasket 353, and the bottom end of the compression spring 355 is under pressure on the drip tube 354. A pull cable 356 is installed on the drip tube 354, and the other end of the pull cable 356 passes through the vertical hole to the outside of the punch 351.

[0025] The punch 351 is in a T-shaped structure as a whole, and a screw hole is provided in the end of the punch 351, and a second bolt 357 is provided in the screw hole; The second bolt 357 is used to fix the tension backstay 356; The dripping pressure release assembly 360 includes a main partition plate 361 and a secondary partition plate 362 disposed on the punch 351, and a winding roller 365 movably mounted between the main partition plate 361 and the secondary partition plate 362; The other end of the cable 356 is wound around the winding roller 365; A pad foot 363 is provided outside the auxiliary partition 362 , and a torsion spring 364 is installed between the pad foot 363 and the winding roller 365 .

[0026] When using the current flat compression strength tester, it is necessary to use a clamp to clamp the two ends of the sample and then apply downward pressure to the middle of the sample until it tears, in order to test the compressive strength of the sample. However, this test has certain disadvantages. Unlike other cardboards, the compressive strength of honeycomb paper is different in different environments after it is made. The single tearing test of the above-mentioned tester is difficult to test the real data of the compressive strength of honeycomb paper in different environments.

[0027] The device innovates the existing punching components for flat compressive strength testing, further enlarges the punch and the workpiece of the pressure-bearing sample, and after the honeycomb paper sleeve is placed on the top of the pressure-bearing end 240, the tester can operate the pressure-supplying pusher 230 until the internal hydraulic sub-rod pushes the punch 351 downward. As the punch 351 continues to pressurize the honeycomb paper, the compressive strength of the honeycomb paper from being compressed to being cut off can be quickly measured under the measurement of the pressure sensor; At the same time, the cut paper sample will be sealed by the punch 351, the gasket 290 and the pressure-bearing end 240. At this time, the cut honeycomb paper will be flattened and partitioned. As the second bolt 357 is loosened and the cable 356 is relaxed, the dropper 354 will be pressed downward by the compression spring 355 and pressed tightly in the partition of the paper sample. At this time, the test medium transferred by the injection component 400 can be impregnated into the paper sample in the partition along the dropper 354, and the two optical lenses 270 will be used to detect the anti-penetration property of the paper sample after flattening and the tearing resistance after immersion in water under selective pressure.

[0028] Embodiment 2: Combination Figure 1-Figure 4 As shown, based on the embodiment 1, the slice pressure measuring mechanism 200 further includes two springs 280 and a gasket 290 disposed on the top of the two springs 280, and a base 210 disposed on the top of the testing machine 100; A fan-shaped notch is provided on the top of the base 210, and two symmetrically distributed drying fans 250 are arranged in the fan-shaped notch; A force arm is disposed on the top of the base 210 , and a transverse groove is provided on the top of the force arm. A threaded hole is disposed inside the transverse groove, and a first bolt 220 is disposed in the threaded hole.

[0029] Preferably, the two drying fans 250 are independent devices, and the drying fans 250 are mainly used to quickly dry the water stains in the inner groove of the pressure-bearing end 240. The air drying can reduce the weakening of the spring 280 caused by the heat steam. At the same time, the end of the air duct of the dry fan 250 that passes through the internal groove of the pressure-bearing end 240 is in an arc-shaped structure.

[0030] Symmetrically distributed plug holes are provided on both sides of the pressure-bearing end 240, and the air ducts of the two drying control fans 250 are respectively passed through the two plug holes and are used to perform drying control operations on the partitioned space after detection; The gasket 290 is disposed in a groove inside the pressure-bearing end head 240; The two springs 280 are disposed in two holes inside the control body 260 .

[0031] Preferably, the gasket 290 is subjected to the upward lifting force of the two springs 280. In the initial state, the top surface of the gasket 290 is flush with the top surface of the pressure-bearing end 240, and two circular holes are opened inside the gasket 290, and the lens on the top of the optical lens 270 is located at the center of the circular hole.

[0032] Embodiment 3: Combination Figure 7 As shown, based on the first embodiment, the paper surface pressurizing mechanism 300 further includes a top plate 310 disposed on the base 210 , and a shield 320 is disposed at the bottom of the top plate 310 .

[0033] Preferably, a hole is provided in the middle of the top plate 310 to provide a lifting rod path for the hydraulic sub-rod in the pressure supply pusher 230; The shield 320 is made of thickened explosion-proof glass, and the aperture of the shield 320 is the same as the diameter width of the pressure-bearing end head 240 , and there is a sufficiently large observation gap between the shield 320 and the pressure-bearing end head 240 .

[0034] Two slide grooves 330 are provided in the shield 320, and a stabilizing pad 340 is movably installed inside the slide grooves 330; The stabilizing pad 340 is composed of a rectangular ring and two fan-shaped inserts, and the top of the top fan-shaped insert is adapted to penetrate into the slot inside the top plate 310; The two groups of stabilizing pads 340 are used to provide effective stabilizing protection for the lifting and lowering of the material cutting and pressing assembly 350 .

[0035] Preferably, symmetrically distributed screw rods are installed on both side walls of the rectangular ring sleeve, and nuts are arranged on the screw rods.

[0036] Embodiment 4: Combination Figure 5 and Figure 6 As shown, in the above embodiment, the liquid injection assembly 400 includes a base 410; Two pre-installed sockets are provided inside the base 410 , and a liquid storage tank 420 is disposed in the pre-installed sockets.

[0037] Preferably, there are two liquid storage tanks 420, and the liquid storage tanks 420 can be made of transparent plastic or transparent glass, wherein the outer wall of the liquid storage tank 420 is provided with a scale for measuring volume.

[0038] Two flow guide tubes 430 are disposed inside the base 410; The flow guide tube 430 is composed of an input end, a hose and an output end; The input end is arranged in the pre-installed socket, and the output end is installed on the liquid inlet pipe 352 .

[0039] Preferably, the connection between the liquid storage tank 420 and the input terminal is only a way to show the input of the selected medium. According to the needs, the pipeline of the external storage that does not pass the medium can be directly connected to the input terminal.

[0040] The working principle and use process of the present invention are as follows: before testing, the paper sleeve to be tested is placed on the top of the pressure-bearing end head 240 until the paper sleeve is flat, and the position of the paper sleeve on the top of the pressure-bearing end head 240 is adjusted until the tested part of the paper sleeve is located at the center of the top port of the pressure-bearing end head 240; Then, the pressure supply pusher 230 is operated, and the hydraulic sub-rod at the bottom thereof will fall downward, and the punch 351 fixed to the bottom end of the hydraulic sub-rod by two sets of bolts will apply pressure to the paper sleeve. As the pressure applied to the paper sleeve by the bottom end of the punch 351 gradually increases, the sensors arranged on the punch 351 and the control body 260 can display the real-time pressure, and finally the paper sleeve is cut off by the bottom end of the punch 351 and the pressure-bearing end 240. At this time, the real-time pressure value displayed by the sensor during the cutting process is the actual compressive strength of the paper sleeve body, and the cut paper sample will be located on the top of the gasket 290. At this time, the bottom end of the punch 351 and the gasket 290 will press the paper sample tightly until it is sealed; At this time, the two optical lenses 270 disposed in the control body 260 are located directly below the paper sample, and holes symmetrically distributed with the two optical lenses 270 are opened in the bottom end of the punch 351, so that the paper sample can be divided into two partitions; The two dropper tubes 354 disposed inside the punch 351 are suspended just above the two partitions of the paper sample; According to the waterproof characteristics and pressure resistance of the paper sleeve material, the two solutions to be tested are injected from the two liquid storage tanks 420 into the two guide tubes 430, and finally along the transfer of the two guide tubes 430, the two solutions can be transferred to the two vertical holes inside the punch 351; According to the detection requirements, by adjusting the two winding rollers 365 to rotate counterclockwise, the cable 356 will be relaxed. At the same time, under the push of the compression spring 355 and the action of gravity, the dropper 354 will press the partitioned paper sample, and cooperate with the two optical lenses 270 to bear the pressure on the bottom of the partitioned paper sample. When the liquid in the two vertical holes inside the punch 351 easily flows out from the outside of the two dropper tubes 354 and finally drips to the two partitions of the paper sample, the two optical lenses 270 are used to observe the dissolution and fracture of the paper sample partitions immersed in different solutions from the bottom, so as to further simulate the anti-dissolution and dissolution strength of the paper sleeve in different solution environments; It is worth noting that the device is not limited to the dissolution test after the titration of the solution. According to the humidity problems such as steam and water mist in the environment, the factors to be tested can be observed on the paper sample through the above-mentioned partitions.

[0041] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A honeycomb paper cover strength testing device, comprising a testing machine (100), characterized in that: It also includes a slice pressure measuring mechanism (200) arranged on the testing machine (100), a paper surface pressure increasing mechanism (300) arranged on the slice pressure measuring mechanism (200), and a liquid injection assembly (400) arranged in the slice pressure measuring mechanism (200); The testing machine (100) is used to provide an effective pressure-bearing platform for the slice pressure-measuring mechanism (200); The slice pressure measuring mechanism (200) comprises a pressure supply propulsion member (230) and a pressure-bearing end head (240); a groove is provided inside the pressure-bearing end head (240); a control body (260) is provided inside the groove; and two optical lenses (270) are provided inside the control body (260); The paper surface pressure-increasing mechanism (300) comprises a material-cutting pressure-applying assembly (350) arranged between a pressure-supplying propulsion member (230) and a pressure-bearing end head (240), and two groups of liquid-dropping pressure-releasing assemblies (360) arranged on the material-cutting pressure-applying assembly (350); The liquid injection assembly (400) is used to provide a transfer platform for different media to be tested.

2. A honeycomb paper cover strength testing device according to claim 1, characterized in that: The slice pressure measuring mechanism (200) further comprises a base (210) arranged on the top of the testing machine (100), the top of the base (210) is provided with a fan-shaped notch, and two symmetrically distributed drying fans (250) are arranged in the fan-shaped notch; Symmetrically distributed plug holes are provided on both sides of the pressure-bearing end head (240), and air ducts of two drying control fans (250) respectively penetrate into the two plug holes and are used to perform drying control operations on the partitioned space after detection.

3. A honeycomb paper cover strength testing device according to claim 1, characterized in that: The paper surface pressurizing mechanism (300) further comprises a top plate (310) arranged on the base (210), and a protective cover (320) is arranged at the bottom of the top plate (310); Two slide grooves (330) are provided in the shield (320), and a stabilization pad (340) is movably installed inside the slide groove (330); The stabilizing pad (340) is composed of a rectangular ring and two fan-shaped inserting plates, and the top of the top fan-shaped inserting plate is adapted to penetrate into the slot inside the top plate (310); The two groups of stabilizing pads (340) are used to provide effective stabilizing protection for the lifting and lowering of the cut material pressure assembly (350).

4. A honeycomb paper cover strength testing device according to claim 1, characterized in that: The material cutting and pressurizing assembly (350) comprises a punch (351) installed at the bottom end of a hydraulic sub-rod in the pressure supplying and pushing member (230); Two vertical holes are formed inside the punch (351), and two liquid inlet pipes (352) are installed outside the punch (351), and the inner cavities of the liquid inlet pipes (352) are connected to the vertical holes; A drip tube (354) is arranged in the vertical hole, a gasket (353) is arranged at the top of the vertical hole, a compression spring (355) is installed at the bottom of the gasket (353), and the bottom end of the compression spring (355) is under pressure on the drip tube (354), and a cable (356) is installed on the drip tube (354), and the other end of the cable (356) passes through the vertical hole to the outside of the punch (351).

5. A honeycomb paper cover strength testing device according to claim 4, characterized in that: The punch (351) is in a T-shaped structure as a whole, and a screw hole is provided in the end of the punch (351), and a second bolt (357) is provided in the screw hole; The second bolt (357) is used to fix the tensioning backstay (356).

6. A honeycomb paper cover strength testing device according to claim 4, characterized in that: The dripping liquid pressure relief assembly (360) comprises a main partition (361) and a secondary partition (362) arranged on the punch (351), and a winding roller (365) movably installed between the main partition (361) and the secondary partition (362); The other end of the cable (356) is wound around a winding roller (365); A pad foot (363) is provided outside the auxiliary partition plate (362), and a torsion spring (364) is installed between the pad foot (363) and the winding roller (365).

7. A honeycomb paper cover strength testing device according to claim 1, characterized in that: The liquid injection assembly (400) comprises a base (410); Two pre-installed sockets are provided inside the base (410), and liquid storage tanks (420) are provided inside the pre-installed sockets; Two flow guide pipes (430) are arranged inside the base (410).

8. A honeycomb paper cover strength testing device according to claim 7, characterized in that: The flow guide pipe (430) is composed of an input end, a hose, and an output end; The input end is arranged in the pre-installed socket, and the output end is installed on the liquid inlet pipe (352).

9. The honeycomb paper cover strength testing device according to claim 2, characterized in that: A force arm is provided on the top of the base (210), a transverse groove is provided on the top of the force arm, and a threaded hole is provided inside the transverse groove; A first bolt (220) is disposed in the threaded hole.

10. The honeycomb paper cover strength testing device according to claim 1, characterized in that: The slice pressure measuring mechanism (200) further comprises two springs (280) and a gasket (290) arranged on top of the two springs (280); The gasket (290) is arranged in a groove inside the pressure-bearing end head (240); The two springs (280) are arranged in two holes inside the control body (260).

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