A sheet product quality detection device

Abstract

The application discloses a kind of sheet product quality detection device, it is related to combustion testing machine technical field, including detection box, controller is arranged in detection box, vertical unit is arranged in detection box, vertical unit one side is provided with horizontal unit, gas adjusting unit is provided on horizontal unit, gas adjusting unit is provided with gas breaking unit, vertical unit includes vertical support and height clamping piece, horizontal unit includes support, gas adjusting unit includes detection piece and adjusting piece, gas breaking unit includes judging piece, detection box is fixedly connected with vertical support, detection box is fixedly connected with support, detection piece is fixedly connected with adjusting piece, judging piece is fixedly connected with detection piece.Workers are measured by clamping the piece in height clamping piece after and adjusting height clamping piece, support and angle adjusting piece, so that measured piece is located in specified space and specific angle test, detect pressure fluctuation by detection piece, adjust air intake by adjusting piece, stop air supply after accidental extinguishing by judging piece.

Description

Technical Field

[0001] This invention relates to the field of combustion testing machine technology, specifically a sheet-like product quality testing device. Background Technology

[0002] The sheet molding compound flammability tester is used to quantitatively test the flame retardant properties of plastic, insulating, and composite sheet materials. It is widely used in product quality verification in the fields of electronics, new energy, and chemicals.

[0003] During the test, the gas pressure was prone to fluctuations due to the decrease in gas volume in the gas cylinder, changes in ambient temperature, and disturbances in the pipeline airflow. The conventional pressure reducing valve had a lagging dynamic response and could not compensate for the gas pressure deviation in real time, which led to the drift of the Bunsen burner flame, unstable height and temperature, and an imbalance in the gas-air mixture ratio, resulting in problems such as incomplete combustion and uneven firepower.

[0004] The aforementioned defects lead to two key problems: First, the combustion conditions are inconsistent, and the unstable flame state changes the heating conditions of the sample, resulting in large dispersion and low repeatability of the test data, which seriously affects the accuracy of the flame retardant rating determination. Second, there are prominent safety hazards. Equipment collisions, instantaneous gas cut-offs, and airflow interference can easily lead to accidental flameout. Existing equipment cannot simultaneously cut off the gas path, and the gas continues to leak out and accumulate in the cavity, which can easily cause poisoning, deflagration, and explosion accidents.

[0005] In summary, there is an urgent need to develop a quality testing device for sheet-like products to solve the above problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is the problem of air source pressure fluctuation and unexpected air interruption during the testing of sheet molding compounds, and provides a quality testing device for sheet products.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] A sheet-like product quality testing device includes a testing box, a controller installed inside the testing box, a vertical unit installed inside the testing box, a horizontal unit installed on one side of the vertical unit, an air regulating unit installed on the horizontal unit, and an air cut-off unit installed on the air regulating unit.

[0009] The vertical unit includes a vertical support and a height clamping component;

[0010] The horizontal unit includes support components;

[0011] The air conditioning unit includes a detection element and an adjustment element. The detection element detects air pressure fluctuations, and the adjustment element adjusts the intake air volume.

[0012] The gas cut-off unit includes a decision-making component;

[0013] The testing box is fixedly connected to the vertical support, the testing box is fixedly connected to the support component, the testing component is fixedly connected to the adjustment component, and the judgment component is fixedly connected to the testing component.

[0014] Furthermore, the test components include a lamp holder, a gas pipe, an air inlet pipe, a lamp tube, and an igniter. The lamp holder is equipped with a gas pipe and a solenoid valve. The lamp holder is equipped with an air inlet pipe and a lamp tube. The lamp tube is equipped with a mounting platform, and the igniter is connected to the lamp tube through the mounting platform.

[0015] Furthermore, the adjustment components include a pressure-sensitive diaphragm, a straight rod, a pull rope, an adjustment tube, a crossbar, and a double-headed elastic telescopic rod. The pressure-sensitive diaphragm is fixedly installed inside the lamp tube. The straight rod is fixedly connected to the pressure-sensitive diaphragm. The straight rod is connected to the adjustment tube via the pull rope. The adjustment tube is a tapered tube, with the smaller diameter end slidingly installed inside the air intake pipe. There are two adjustment tubes, which are connected via the double-headed elastic telescopic rod. The adjustment tube is slidably connected to the crossbar, which is fixedly installed inside the lamp tube. The gas pipe is connected to an external gas source via a pipeline.

[0016] Furthermore, the determining components include a memory bimetallic strip, a push plate, an upper slider, a return spring, a lower slider, and a mounting box. The memory bimetallic strip is fixedly mounted on a fixed platform. The push plate is inclinedly arranged on the side of the memory bimetallic strip near the lamp tube. The upper slider has a groove. One end of the push plate abuts against the groove of the upper slider. The upper slider is connected to the lower slider through the return spring. The upper slider is slidably mounted in the mounting box. The lower slider is fixedly mounted in the mounting box. The mounting box is fixedly connected to the lamp tube.

[0017] Furthermore, the coefficient of thermal expansion of the bimetallic strip closer to the lamp tube is greater than that of the strip farther away from the lamp tube.

[0018] Furthermore, an elastic block is provided at the end of the upper slider near the lower slider, and a rectangular groove is provided at the end of the lower slider near the upper slider, with a control switch provided in the rectangular groove.

[0019] Furthermore, the support components include an electric telescopic rod, a support plate, a rotating plate, and a column. The lamp is fixedly installed on the rotating plate, the fixed end of the electric telescopic rod is fixedly installed inside the testing box, and the telescopic end of the electric telescopic rod is fixedly connected to the support plate. There are two support plates, which are connected by a connecting rod. The rotating plate is rotatably installed on the support plate, and the column is fixedly installed inside the testing box. The support plate near the column is connected to the column through the telescopic rod.

[0020] Furthermore, the bracket is fixedly installed inside the testing box, and multiple sets of fixing plates are evenly arranged on the bracket.

[0021] Furthermore, the height clamping component includes a height clamping assembly, an adjusting rod, and a product clamping assembly. The height clamping assembly is tightly fitted to both ends of the fixing plate. The adjusting rod is installed inside the height clamping assembly, and the product clamping assembly is provided at the end of the adjusting rod.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention delivers ignition gas to the lamp tube via a gas pipe. The gas enters the lamp tube and is ignited by the igniter to form a test flame. When the gas supply pressure increases, the pressure-sensitive diaphragm deforms downwards, causing two adjusting tubes to slide towards each other along the crossbar via a straight rod and a pull rope. This compresses the double-headed elastic telescopic rod, causing the narrow end of the conical adjusting tube to penetrate deeper into the air intake pipe, widening the air intake gap to match the increased gas volume. When the pressure decreases, the pressure-sensitive diaphragm rebounds, and the double-headed elastic telescopic rod opens the adjusting tube, narrowing the air intake gap, reducing air mixing, stabilizing the air-fuel ratio, preventing flame deviation and incomplete combustion, and ensuring stable and accurate test data.

[0024] 2. This invention heats a memory bimetallic strip during normal combustion. Due to the difference in the expansion coefficients of the two metals, the memory bimetallic strip bends and pushes against the push plate, causing the upper slider to move down along the mounting box and compress the reset spring. The bottom elastic block touches the control switch inside the lower slider, transmitting a normal combustion signal to the controller. The gas pipe solenoid valve continues to supply gas. After the flame is accidentally extinguished, the heat source disappears, the memory bimetallic strip cools and returns to its original state, and the reset spring pushes up the upper slider to disconnect the control switch. After receiving the flameout signal, the controller immediately closes the solenoid valve to cut off the gas supply, preventing gas from accumulating in the detection box and avoiding the safety risks of poisoning and deflagration. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the detection box of the present invention;

[0027] Figure 3 This is a schematic diagram of the external structure of the vertical unit of the present invention;

[0028] Figure 4 This is a schematic diagram of the external structure of the horizontal unit of the present invention;

[0029] Figure 5 This is a schematic diagram of the installation position of the detection component according to the present invention;

[0030] Figure 6 for Figure 5 A partial enlarged view of the structure at point A in the middle;

[0031] Figure 7 for Figure 5 A partial enlarged view of the structure at point B in the middle;

[0032] Figure 8 This is a schematic diagram of the internal structure of the mounting box of the present invention.

[0033] In the diagram: 1. Testing box; 11. Controller; 2. Vertical unit; 21. Bracket; 211. Fixing plate; 22. Height clamping component; 221. Height clamping assembly; 222. Adjusting rod; 223. Product clamping assembly; 3. Horizontal unit; 31. Support component; 311. Electric telescopic rod; 312. Support plate; 313. Rotating plate; 314. Column; 4. Air regulating unit; 41. Testing component; 411. Lamp tube; 412. 413 Gas pipe; 414 Inlet pipe; 415 Lamp tube; 416 Igniter; 42 Adjusting component; 421 Pressure-sensing diaphragm; 422 Straight rod; 423 Pull rope; 424 Adjusting pipe; 425 Horizontal rod; 426 Double-headed elastic telescopic rod; 5. Gas shut-off unit; 51 Detection component; 511 Memory bimetallic strip; 512 Push plate; 513 Upper slider; 514 Return spring; 515 Lower slider; 516 Mounting box. Detailed Implementation

[0034] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0035] like Figures 1-6 As shown in Embodiment 1 of the present invention, a technical solution for a sheet-like product quality testing device is provided.

[0036] The specific content of Embodiment 1 is as follows: A sheet product quality testing device includes a testing box 1, a controller 11 is provided inside the testing box 1, a vertical unit 2 is provided inside the testing box 1, a horizontal unit 3 is provided on one side of the vertical unit 2, an air regulating unit 4 is provided on the horizontal unit 3, and an air cut-off unit 5 is provided on the air regulating unit 4.

[0037] The vertical unit 2 includes a vertical support 21 and a height clamping member 22;

[0038] Horizontal unit 3 includes support member 31;

[0039] The air conditioning unit 4 includes a detection element 41 and an adjustment element 42. The detection element 41 detects air pressure fluctuations and the adjustment element 42 adjusts the air intake volume.

[0040] Gas cut-off unit 5 includes a determination element 51;

[0041] The detection box 1 is fixedly connected to the vertical support 21, the detection box 1 is fixedly connected to the support 31, the detection component 41 is fixedly connected to the adjustment component 42, and the judgment component 51 is fixedly connected to the detection component 41.

[0042] The staff clamps the test piece in the height clamp 22 and adjusts the height clamp 22, the support 31 and the angle adjustment piece 42 to make the test piece in a designated space and at a specific angle. The detection piece 41 detects air pressure fluctuations, the adjustment piece 42 adjusts the air intake, and the judgment piece 51 determines that the gas supply will be stopped after an accidental extinguishing.

[0043] The testing component 41 includes a lamp tube 411, a gas pipe 412, an air inlet pipe 413, a lamp tube 414, and an igniter 415. The lamp tube 411 is equipped with a gas pipe 412 and a solenoid valve. The lamp tube 411 is equipped with an air inlet pipe 413 and a lamp tube 414. A mounting platform is mounted on the lamp tube 414. The igniter 415 is connected to the lamp tube 414 through the mounting platform. The gas pipe 412 is connected to an external gas source through a pipe.

[0044] The adjusting component 42 includes a pressure-sensitive diaphragm 421, a straight rod 422, a pull rope 423, an adjusting tube 424, a crossbar 425, and a double-headed elastic telescopic rod 426. The pressure-sensitive diaphragm 421 is fixedly installed inside the lamp tube 411. The straight rod 422 is fixedly connected to the pressure-sensitive diaphragm 421. The straight rod 422 is connected to the adjusting tube 424 through the pull rope 423. The adjusting tube 424 is a tapered tube. The smaller diameter end of the adjusting tube 424 is slidably installed inside the air inlet pipe 413. There are two adjusting tubes 424, which are connected by the double-headed elastic telescopic rod 426. The adjusting tube 424 is slidably connected to the crossbar 425, and the crossbar 425 is fixedly installed inside the lamp tube 411.

[0045] After ignition, an external gas source supplies gas to the lamp tube 411 through the gas pipe 412. The gas flows into the lamp tube 414 and is ignited by the igniter 415, forming a stable test flame. During combustion, if the gas supply pressure increases due to factors such as gas cylinder volume reduction, pipeline airflow disturbance, or ambient temperature changes, the gas pressure inside the lamp tube 411 will rise synchronously. The pressure acts on the pressure-sensing diaphragm 421 (a fabric-reinforced HNBR corrugated diaphragm model can be selected), causing it to bend downwards. This causes the straight rod 422, which is fixed to the pressure-sensing diaphragm 421, to move downwards synchronously. The straight rod 422 pulls the adjusting tubes 424 on both sides along the crossbar 425 to slide closer to each other via the pull rope 423. At the same time, it compresses the double-headed elastic telescopic rod 426 between the two adjusting tubes 424, causing it to contract. Since the adjusting tube 424 has a conical structure, the smaller diameter end is inserted into the air inlet pipe 413. When the two adjusting tubes 424 approach each other, the thinner section of the conical tube flows from the air inlet. As the inside of pipe 413 moves outward, the ventilation gap between the inner wall of the intake pipe 413 and the outer wall of the regulating pipe 424 increases accordingly. The intake opening of external air increases synchronously, and the amount of air mixed in increases accordingly to match the increased gas flow. Conversely, when the gas supply pressure decreases, the gas pressure inside the lamp tube 411 decreases, the pressure-sensing diaphragm 421 deforms and resets in the opposite direction, and the traction force of the pull rope 423 decreases synchronously. At this time, the double-headed elastic telescopic rod 426 extends by its own elastic restoring force, pushing the two regulating pipes 424 away from each other along the crossbar 425. The thicker section of the conical tube moves towards the intake pipe 413 opening, and the ventilation gap decreases accordingly. The intake opening of external air decreases, and the amount of air mixed in decreases accordingly to match the reduced gas flow. This effectively offsets the air-fuel ratio imbalance caused by fluctuations in gas source pressure, avoids flame drift, incomplete combustion, uneven firepower, and other phenomena, ensures consistent combustion conditions for different test batches, and improves the accuracy and repeatability of flame retardant rating determination.

[0046] like Figure 7 , Figure 8 As shown, in Embodiment 2 of the present invention, the gas shut-off unit 5 in Embodiment 1 is optimized. The judgment element 51 monitors the accidental extinguishing of the flame to avoid the continuous leakage of gas after accidental flameout, which may cause safety hazards such as gas poisoning, deflagration, and explosion.

[0047] The specific content of Embodiment 2 is as follows: The judgment component 51 includes a memory bimetallic strip 511, a push plate 512, an upper slider 513, a reset spring 514, a lower slider 515, and a mounting box 516. The memory bimetallic strip 511 is fixedly installed on the fixed platform. The push plate 512 is inclinedly arranged on the side of the memory bimetallic strip 511 near the lamp tube 414. The upper slider 513 is provided with a groove. One end of the push plate 512 abuts against the groove of the upper slider 513. The upper slider 513 is connected to the lower slider 515 through the reset spring 514. The upper slider 513 is slidably installed in the mounting box 516. The lower slider 515 is fixedly installed in the mounting box 516. The mounting box 516 is fixedly connected to the lamp tube 414.

[0048] The coefficient of thermal expansion of the bimetallic strip 511 at the end closer to the lamp tube 414 is greater than that at the end farther away from the lamp tube 414.

[0049] An elastic block is provided at the end of the upper slider 513 near the lower slider 515, and a rectangular groove is provided at the end of the lower slider 515 near the upper slider 513, and a control switch is provided in the rectangular groove.

[0050] During normal combustion, the flame at the outlet of lamp tube 414 continuously radiates heat energy, and the memory bimetallic strip 511, which is installed close to the fixed platform, is continuously heated. Since the metal expansion coefficient of the memory bimetallic strip 511 on the side closer to lamp tube 414 is greater than that on the side farther away from lamp tube 414, the memory bimetallic strip 511 will bend and deform towards the flame side after being heated, pushing the inclined push plate 512 to move synchronously, thereby driving the upper slider 513 to slide down along the inner wall of the mounting box 516. At the same time, it compresses the reset spring 514 between the upper slider 513 and the lower slider 515. When the upper slider 513 moves down to the set stroke, the elastic block at its bottom just presses into the rectangular groove at the end of the lower slider 515, triggering the control switch in the groove. The control switch transmits a continuous conduction signal to the controller 11. Based on this, the controller 11 determines that the flame is in a normal combustion state and controls the solenoid valve on the gas pipe 412 to remain open, continuously supplying gas.

[0051] If the flame is accidentally extinguished due to external impact, momentary interruption of gas supply, or abnormal airflow disturbance, the flame heat source will disappear instantly. The memory bimetallic strip 511 will cool down quickly and return to its initial flat state. The pushing force of the push plate 512 on the upper slider 513 will be eliminated simultaneously. At this time, the compressed reset spring 514 will release its elastic potential energy and push the upper slider 513 to slide upward along the mounting box 516 to reset. The elastic block will then disengage from the rectangular groove of the lower slider 515. The control switch will then disconnect and transmit a flameout signal to the controller 11. After receiving the signal, the controller 11 will immediately control the solenoid valve on the gas pipe 412 to close, completely cutting off the gas supply path and preventing the gas from continuously leaking and accumulating inside the detection box 1 after flameout. This will eliminate the safety hazards of gas poisoning, deflagration, and explosion from the source.

[0052] like Figure 3 , Figure 4 As shown, in Embodiment 3 of the present invention, the vertical unit 2 and the horizontal unit 3 in Embodiment 1 are optimized. The vertical height and extension distance of the sample are positioned by the height clamp 22, and the horizontal position and combustion angle of the sample are calibrated by the support 31 to ensure that the heating conditions of the sample meet the requirements of the testing standard.

[0053] The specific content of Embodiment 3 is as follows: The support component 31 includes an electric telescopic rod 311, a support plate 312, a rotating plate 313, and a column 314. The lamp tube 411 is fixedly installed on the rotating plate 313. The fixed end of the electric telescopic rod 311 is fixedly installed inside the test box 1. The telescopic end of the electric telescopic rod 311 is fixedly connected to the support plate 312. There are two support plates 312, which are connected by a connecting rod. The rotating plate 313 is rotatably installed on the support plate 312. The column 314 is fixedly installed inside the test box 1. The support plate 312 near the end of the column 314 is connected to the column 314 through the telescopic rod.

[0054] After vertical positioning is completed, the electric telescopic rod 311 is extended and retracted by the controller 11, which drives the two support plates 312, which are synchronously linked by the connecting rod, to move horizontally as a whole. The support plate 312 on the side closer to the column 314 is connected to the column 314 through the telescopic rod, and plays a guiding and supporting role during the horizontal movement, ensuring that the entire combustion mechanism moves smoothly to the preset working area. Then, the deflection angle of the rotating plate 313 is adjusted so that the flame emitted by the lamp tube 414 is accurately aligned with the designated test surface of the sample, completing the calibration of the horizontal position and combustion angle, and ensuring that the sample heating conditions meet the requirements of the testing standard.

[0055] The bracket 21 is fixedly installed inside the test box 1, and multiple sets of fixing plates 211 are evenly arranged on the bracket 21.

[0056] The height clamping component 22 includes a height clamping assembly 221, an adjusting rod 222, and a product clamping assembly 223. The height clamping assembly 221 and the fixing plate 211 are tightly fitted at both ends. The adjusting rod 222 is installed inside the height clamping assembly 221, and the product clamping assembly 223 is provided at the end of the adjusting rod 222.

[0057] After completing the pre-start inspection of the equipment, the staff first performs sample clamping and test position adjustment. The sheet molding compound sample to be tested is clamped and fixed on the product clamping assembly 223 (the product clamping assembly 223 consists of a tightening screw and a push plate; the staff rotates the tightening screw to drive the push plate closer to the adjusting rod 222 to press the sample). The extension length of the adjusting rod 222 is adjusted according to the test requirements. After the sample position is confirmed, the height clamping assembly 221 (the height clamping assembly 221 consists of upper and lower clamping plates, a tightening screw and a fixing block; the staff rotates the tightening screw to drive the clamping plate closer to the fixing block, pressing the adjusting rod 222 at one end and the fixing plate at the other end) is clamped onto the corresponding fixing plate 211 of the vertical bracket 21. The adjusting rod 222 is fixed synchronously by the locking force of the height clamping assembly 221, thus completing the positioning of the sample's vertical height and extension distance.

[0058] Working principle of the invention:

[0059] After ignition, the gas source is sent to the lamp tube 411 through the gas pipe 412. The gas enters the lamp tube 414 and is ignited by the igniter 415 to form a test flame. When the gas supply pressure increases, the gas pressure compresses the pressure-sensing diaphragm 421 to deform downwards. This deformation is caused by the straight rod 422 and the pull rope 423, which drive the two regulating tubes 424 to slide towards each other along the crossbar 425, compressing the double-headed elastic telescopic rod 426. The thin end of the conical regulating tube 424 extends into the air intake pipe 413, widening the air intake gap to match the increased gas volume. When the pressure decreases, the pressure-sensing diaphragm 421 rebounds, and the double-headed elastic telescopic rod 426 opens the regulating tube 424, narrowing the air intake gap, reducing air mixing, stabilizing the air-fuel ratio, preventing flame deviation and incomplete combustion, and ensuring stable and accurate test data.

[0060] During normal combustion, the flame heats the memory bimetallic strip 511. Due to the difference in the expansion coefficients of the metals on both sides, the memory bimetallic strip 511 bends and pushes the push plate 512, causing the upper slider 513 to move down along the mounting box 516 and compress the reset spring 514. The bottom elastic block touches the control switch inside the lower slider 515, transmitting a normal combustion signal to the controller 11. The solenoid valve of the gas pipe 412 continues to supply gas. After the flame is accidentally extinguished, the heat source disappears, the memory bimetallic strip 511 cools and returns to its original state, and the reset spring 514 pushes up the upper slider 513 to disconnect the control switch. After receiving the flameout signal, the controller 11 immediately closes the solenoid valve to cut off the gas supply, preventing the gas from accumulating in the detection box 1 and avoiding the safety risks of poisoning and deflagration.

[0061] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quality inspection device for sheet-like products, characterized in that: The sheet product quality testing device includes a testing box (1), a controller (11) is provided inside the testing box (1), a vertical unit (2) is provided inside the testing box (1), a horizontal unit (3) is provided on one side of the vertical unit (2), an air regulating unit (4) is provided on the horizontal unit (3), and an air cut-off unit (5) is provided on the air regulating unit (4). The vertical unit (2) includes a vertical support (21) and a height clamping member (22); The horizontal unit (3) includes a support member (31); The air conditioning unit (4) includes a detection element (41) and an adjustment element (42). The detection element (41) detects air pressure fluctuations and the adjustment element (42) adjusts the air intake volume. The gas cut-off unit (5) includes a determination element (51); The detection box (1) is fixedly connected to the vertical support (21), the detection box (1) is fixedly connected to the support (31), the detection component (41) is fixedly connected to the adjustment component (42), and the judgment component (51) is fixedly connected to the detection component (41). The detection component (41) includes a lamp tube (411), a gas pipe (412), an air inlet pipe (413), a lamp tube (414), and an igniter (415). The lamp tube (411) is provided with a gas pipe (412), and the gas pipe (412) is provided with a solenoid valve. The lamp tube (411) is provided with two opposing air inlet pipes (413). The lamp tube (414) is provided with a lamp tube (414), and the lamp tube (414) is provided with a fixed platform. The igniter (415) is set on one side of the lamp tube (414) through the fixed platform. The gas pipe (412) is connected to an external gas source through a pipe. The adjusting component (42) includes a pressure-sensitive diaphragm (421), a straight rod (422), a pull rope (423), an adjusting tube (424), a crossbar (425), and a double-headed elastic telescopic rod (426). The pressure-sensitive diaphragm (421) is fixedly installed inside the lamp tube (411) and located below the gas pipe (412). The straight rod (422) is fixedly connected to the upper surface of the pressure-sensitive diaphragm (421). The straight rod (422) is connected to the gas pipe (412) by the pull rope (423). Connected to the regulating pipe (424), the regulating pipe (424) is a tapered pipe, the smaller diameter end of the regulating pipe (424) is slidably installed inside the air intake pipe (413), there are two regulating pipes (424), the larger diameter ends of the two regulating pipes (424) are connected by a double-headed elastic telescopic rod (426), the regulating pipe (424) is slidably connected to the crossbar (425), and the crossbar (425) is fixedly installed inside the lamp tube (411); The determining component (51) includes a memory bimetallic strip (511), a push plate (512), an upper slider (513), a reset spring (514), a lower slider (515), and a mounting box (516). The memory bimetallic strip (511) is fixedly mounted on a fixed platform. The push plate (512) is inclinedly arranged on the side of the memory bimetallic strip (511) near the lamp tube (414). The upper slider (513) is provided with a groove. One end of the push plate (512) abuts against the groove of the upper slider (513). The upper slider (513) is connected to the lower slider (515) through the reset spring (514). The upper slider (513) is slidably mounted in the mounting box (516). The lower slider (515) is fixedly mounted in the mounting box (516). The mounting box (516) is fixedly connected to the lamp tube (414). The coefficient of thermal expansion of the bimetallic strip (511) at the end closer to the lamp tube (414) is smaller than that at the end farther from the lamp tube (414). An elastic block is provided at one end of the upper slider (513) near the lower slider (515), and a rectangular groove is provided at one end of the lower slider (515) near the upper slider (513). A control switch is provided in the rectangular groove, and the control switch is electrically connected to the solenoid valve at the gas pipe (412).

2. The sheet product quality testing device according to claim 1, characterized in that: The support component (31) includes an electric telescopic rod (311), a support plate (312), a rotating plate (313), and a column (314). The lamp tube (411) is fixedly installed on the rotating plate (313). The fixed end of the electric telescopic rod (311) is fixedly installed inside the test box (1). The telescopic end of the electric telescopic rod (311) is fixedly connected to the support plate (312). There are two support plates (312), which are connected by a connecting rod. The rotating plate (313) is rotatably installed on the support plate (312). The column (314) is fixedly installed inside the test box (1). The support plate (312) near the end of the column (314) is connected to the column (314) by a telescopic rod.

3. The sheet product quality testing device according to claim 2, characterized in that: The bracket (21) is fixedly installed inside the test box (1), and multiple sets of fixing plates (211) are evenly arranged on the bracket (21).

4. The sheet product quality testing device according to claim 3, characterized in that: The height clamping component (22) includes a height clamping assembly (221), an adjusting rod (222), and a product clamping assembly (223). The height clamping assembly (221) is tightly fitted to both ends of the fixing piece (211). The adjusting rod (222) is installed inside the height clamping assembly (221), and the product clamping assembly (223) is provided at the end of the adjusting rod (222).

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