Thermal insulation cotton hot pressing thickness detection device

Abstract

The application discloses a kind of heat insulation cotton hot-pressing thickness detection device, including detection platform, further including the conveying belt for conveying heat insulation cotton, and the conveying belt is from detection platform top plane and is adhered to pass, further include: thickness detection component, for detecting the thickness of heat insulation cotton when the conveying belt stops;Surface detection component includes laser scanning part and image acquisition part, laser scanning part is inclined to the surface of heat insulation cotton and emits laser horizontal line, and moves along its surface, image acquisition part is located directly above heat insulation cotton and carries out image acquisition to the track of laser horizontal line.The present application can detect the thickness of heat insulation cotton by thickness detection component, and also can carry out image acquisition to the track of laser horizontal line by image acquisition part, according to the change of laser horizontal line in image, the surface quality of heat insulation cotton can be detected, and the measurement of heat insulation cotton thickness can make the detection range of heat insulation cotton wider, and the detection result is more objective.

Description

Technical Field

[0001] This invention relates to the field of thermal insulation cotton testing technology, specifically a thermal insulation cotton hot-pressing thickness testing device. Background Technology

[0002] The thermal insulation cotton for power batteries is a material used to prevent thermal runaway of battery cells and improve the ride comfort of new energy vehicles. It is composed of PET film, silicone frame, aerogel and other composites. After being processed by a vacuum hot press, it provides excellent protection against thermal runaway, short circuits and insulation. It can ensure that even if the battery overheats, it will not produce sparks or smoke and burn.

[0003] After the thermal insulation cotton is hot-pressed, it is usually necessary to test it to check its quality. For example, Chinese Patent Publication No. CN219723744U discloses a thermal insulation cotton thickness testing machine. This testing machine can conveniently and quickly measure the thickness of the thermal insulation cotton after it is glued, and it can be operated continuously without stopping the machine, which greatly reduces manpower consumption, improves the efficiency of thermal insulation cotton production, is suitable for mass production, and has strong practicality.

[0004] However, this equipment cannot test the surface quality of the heat insulation cotton after hot pressing. The surface quality of the PET film of the heat insulation cotton after hot pressing will also affect the performance of the heat insulation cotton, because the surface quality of the PET film is related to the change of internal stress of the heat insulation cotton. Poor surface quality will also affect the overall quality of the heat insulation cotton. Therefore, only testing the thickness of the heat insulation cotton will lead to certain limitations in the test results. Summary of the Invention

[0005] The purpose of this invention is to provide a heat insulation cotton hot-pressing thickness detection device to solve at least one technical problem existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a heat insulation cotton hot-pressing thickness detection device, comprising a detection platform, and a conveyor belt for conveying the heat insulation cotton, wherein the conveyor belt passes over the top plane of the detection platform, and further comprising:

[0007] The thickness detection component is used to detect the thickness of the insulation cotton when the conveyor belt stops.

[0008] The surface detection component includes a laser scanning unit and an image acquisition unit. The laser scanning unit emits a laser line at an angle toward the surface of the insulation cotton and moves along its surface. The image acquisition unit is located directly above the insulation cotton and acquires an image of the trajectory of the laser line.

[0009] Preferably, the thickness detection component includes three sets of cylinders mounted on the top of the detection platform via a bracket, with the three sets of cylinders corresponding to the two sides and the middle position of the insulation cotton, respectively. A pressure strip is fixed to the bottom end of the output shaft of the cylinder, and a trigger probe is installed on the side of the pressure strip.

[0010] Preferably, the surface inspection assembly includes a gantry frame fixed to the top of the inspection platform, and the gantry frame spans across the conveyor belt. The image acquisition unit includes a fixed rod fixed to the bottom center of the gantry frame, and an image acquisition device is installed at the bottom of the fixed rod. The laser scanning unit has two sets, which are symmetrically arranged about the fixed rod. The laser scanning unit includes a vertical rod fixed to the bottom of one side of the gantry frame. A fixed shaft is fixed to the bottom outer wall of the vertical rod. A reciprocating gear is installed on the outer wall of the fixed shaft. A laser head is fixed to the outer wall of the gear, and the laser direction of the laser head is along the diameter direction of the gear.

[0011] Preferably, a telescopic cylinder is installed on the top of the gantry frame. The output shaft of the telescopic cylinder passes through the bottom of the gantry frame and is fixed with a housing. The top of the housing has a through hole for the vertical rod and the fixed rod to pass through and slide. The bottom of the housing has a sliding cavity. A sliding frame is vertically slidably installed on the inner wall of the sliding cavity. A spring is connected to the top of the sliding frame and the inner top of the sliding cavity. A rack is installed on the inner wall of the housing. When the sliding frame contacts the conveyor belt, the rack meshes with the gear.

[0012] Preferably, a pressure plate is fixed to the bottom inner side of the housing, and a pressure sensor is installed on the bottom surface of the pressure plate. A trigger point is installed on the outer wall of the fixed shaft, and a trigger switch is installed on the inner ring of the gear. The trigger switch controls the laser emitted by the laser head to switch between horizontal lines and rays. Laser receivers are installed on both sides of the image acquisition device. When the pressure sensor detects a pressure signal, it controls the telescopic cylinder to stop telescopicating.

[0013] Preferably, the laser receiver includes a detection block installed on the side of the image acquisition unit. The outer wall of the detection block has a groove, and a receiver is installed in the groove. The receiver has multiple laser receiving points arranged vertically.

[0014] Preferably, the outer wall of the sliding frame is provided with a ventilation hole, and the outer wall of the housing is provided with an upper through hole and a lower through hole, and the upper through hole and the lower through hole are both located within the sliding range of the sliding frame. When the sliding frame slides inside the housing, the ventilation hole communicates with the upper through hole or the lower through hole.

[0015] Preferably, a dimming glass is installed at the slot of the detection block, and when the pressure sensor does not detect a pressure signal, the dimming glass is in a de-energized state, and when the pressure sensor detects a pressure signal, the dimming glass is energized.

[0016] Preferably, the outer surface of the dimming glass is a concave transparent surface.

[0017] Preferably, the top surfaces of the detection platforms on both sides of the conveyor belt are equipped with limiting hooks, and the limiting hooks ensure that the conveyor belt and the detection platform always slide and fit together.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention uses a laser scanning unit to emit a horizontal laser line at an angle towards the surface of the insulation cotton. When the laser line illuminates bubbles, depressions, or wrinkles in the insulation cotton, the line will locally exhibit a wavy arc. The laser line is then moved along the surface of the insulation cotton, and an image acquisition unit located above the insulation cotton will capture an image of the trajectory of the laser line. The surface quality of the insulation cotton can be detected based on the changes in the laser line in the image. At the same time, the size of the wave can be used to judge the quality of the surface. Combined with the measurement of the insulation cotton thickness, the detection range of the insulation cotton can be widened, and the detection results can be more objective. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the thickness detection component in Embodiment 1 of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the surface detection component in Embodiment 2 of the present invention;

[0022] Figure 3 This is a sectional perspective view and a partial enlarged view of the shell and sliding frame in Embodiment 2 of the present invention;

[0023] Figure 4 This is a cross-sectional view of the casing and sliding frame in Embodiment 2 of the present invention;

[0024] Figure 5 For the present invention Figure 4 A magnified view of a portion of the gear;

[0025] Figure 6 For the present invention Figure 4 Enlarged cross-sectional view of the detection block;

[0026] Figure 7 This is a simplified view of the laser horizontal line illuminating the heat insulation cotton according to the present invention.

[0027] In the diagram: 1. Detection platform; 2. Conveyor belt; 3. Insulation cotton; 4. Gripping robot; 5. Gantry frame; 6. Housing; 7. Sliding frame; 8. Telescopic cylinder; 9. Fixed rod; 10. Image acquisition device; 11. Vertical rod; 12. Fixed shaft; 13. Gear; 14. Laser head; 15. Rack; 16. Sliding cavity; 17. Pressure plate; 18. Pressure sensor; 19. Ventilation port; 20. Upper through hole; 21. Lower through hole; 22. Trigger point; 23. Trigger switch; 24. Spring; 25. Detection block; 26. Receiver; 27. Laser receiving point; 28. Dimming glass; 29. ​​Cylinder; 30. Pressure strip; 31. Trigger probe; 32. Limit hook. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 1 The present invention provides a technical solution: a heat insulation cotton hot-pressing thickness detection device, including a detection platform 1, and a conveyor belt 2 for conveying heat insulation cotton 3, wherein the conveyor belt 2 passes over the top plane of the detection platform 1, and further includes:

[0030] The thickness detection component is used to detect the thickness of the insulation cotton 3 when the conveyor belt 2 stops;

[0031] The surface detection component includes a laser scanning unit and an image acquisition unit. The laser scanning unit emits a laser line at an angle toward the surface of the insulation cotton 3 and moves along its surface. The image acquisition unit is located directly above the insulation cotton 3 and acquires an image of the trajectory of the laser line.

[0032] When in use, the detection device conveys the heat insulation cotton 3 after hot pressing to the bottom of the thickness detection component via the conveyor belt 2 and then stops conveying. The thickness detection component detects the thickness of the heat insulation cotton 3 to detect its quality. At the same time, the thickness of the heat insulation cotton 3 can also reflect the forming quality of the hot pressing machine.

[0033] After thickness measurement, a laser scanning unit is tilted to emit horizontal laser lines onto the surface of the insulation cotton 3. Due to the tilted laser beam, when the laser lines illuminate air bubbles, depressions, or wrinkles in the insulation cotton 3, the horizontal lines will locally exhibit wavy arcs. See [link / reference needed] for details. Figure 7As shown in L, the laser horizontal line is then moved along the surface of the heat insulation cotton 3. The image acquisition unit located above the heat insulation cotton 3 will then acquire an image of the trajectory of the laser horizontal line. The surface quality of the heat insulation cotton 3 can be detected based on the changes in the laser horizontal line in the image. At the same time, the quality of the surface can be judged based on the size of the wave. Combined with the measurement of the thickness of the heat insulation cotton 3, the detection range of the heat insulation cotton 3 can be wider and the detection results can be more objective.

[0034] It is worth mentioning that, due to the tilted illumination of the laser, the ripples produced by the laser lines will amplify the minute defects on the surface of the insulation cotton 3, thus making the test results more precise.

[0035] A gripping robot 4 can also be installed at the unloading section of conveyor belt 2, such as... Figure 1 As shown, this is to facilitate the differentiation and placement of insulation cotton 3 of different qualities and thicknesses.

[0036] Example 1 provides an implementation method for detecting the thickness of thermal insulation cotton;

[0037] The thickness detection component includes three sets of cylinders 29 mounted on the top of the detection platform 1 via a bracket. The three sets of cylinders 29 correspond to the two sides and the middle position of the heat insulation cotton 3, respectively. A pressure strip 30 is fixed at the bottom of the output shaft of the cylinder 29, and a trigger probe 31 is installed on the side of the pressure strip 30.

[0038] See Figure 1 After the insulation cotton 3 is conveyed to the bottom of the pressure strip 30, the three sets of cylinders 29 are activated to press down the three pressure strips 30 and measure the thickness of the insulation cotton 3 in three areas respectively. At the same time, the probe 31 is triggered to read the value by touch, so as to perform multi-point thickness measurement of the insulation cotton 3 and make the measurement result more accurate. The probe 31 can be a height sensor or a distance sensor, that is, the height of the insulation cotton 3 is measured by measuring the distance between the pressure strip 30 and the conveyor belt 2.

[0039] Example 2 provides an implementation method for detecting the surface quality of thermal insulation cotton, and also provides a second implementation method for detecting the thickness of thermal insulation cotton. See details below. Figure 2-7 ;

[0040] The surface inspection assembly includes a gantry 5 fixed to the top of the inspection platform 1, and the gantry 5 spans across the conveyor belt 2. The image acquisition unit includes a fixed rod 9 fixed to the bottom center of the gantry 5. An image acquisition device 10 is installed at the bottom of the fixed rod 9. There are two sets of laser scanning units, which are symmetrically arranged about the fixed rod 9. The laser scanning unit includes a vertical rod 11 fixed to the bottom of one side of the gantry 5. A fixed shaft 12 is fixed to the bottom outer wall of the vertical rod 11. A reciprocating gear 13 is installed on the outer wall of the fixed shaft 12. A laser head 14 is fixed to the outer wall of the gear 13, and the laser direction of the laser head 14 is along the diameter direction of the gear 13.

[0041] See details Figure 4 The external structure drives the gear 13 to rotate, causing the laser head 14 on it to swing, so that the laser line emitted by the laser head 14 moves and scans the surface of the heat insulation cotton 3, and then the image acquisition device 10 captures the image of the laser line.

[0042] The system is equipped with two sets of laser scanning sections. This allows the scanning ranges of the two laser heads 14 to overlap, providing dual detection of the heat insulation cotton 3 and preventing blind spots in the scanning process. Figure 4 As shown, on the other hand, since the laser head 14 irradiates along with the rotation of the gear 13, the irradiation angle is different for different irradiation positions of the heat insulation cotton 3. The larger the irradiation angle, that is, the closer the irradiation position is to the gear 13, the smaller the fluctuation change of the laser horizontal line. Conversely, the farther the irradiation position is from the gear 13, the smaller the irradiation angle, and the greater the fluctuation change of the laser horizontal line. The setting of two sets of laser heads 14 can compensate for each other. The double irradiation at the same position, and the different irradiation directions and angles, means that the defect at one position will have two different display states. In this way, by comparing the images of the two laser heads 14, the surface defect detection of the heat insulation cotton 3 can be more objective and accurate, and the detection quality is also higher.

[0043] Similarly, when gear 13 rotates in the reverse direction, it can also perform a secondary scan of the heat insulation cotton 3.

[0044] In one preferred embodiment, a reciprocating rotation drive for gear 13 is provided;

[0045] A telescopic cylinder 8 is installed on the top of the gantry frame 5. The output shaft of the telescopic cylinder 8 passes through the bottom of the gantry frame 5 and is fixed with a housing 6. The top of the housing 6 has a through hole for the vertical rod 11 and the fixed rod 9 to pass through and slide. The bottom of the housing 6 has a sliding cavity 16. A sliding frame 7 is vertically slidably installed on the inner wall of the sliding cavity 16. A spring 24 is connected to the top of the sliding frame 7 and the inner top of the sliding cavity 16. A rack 15 is installed on the inner wall of the housing 6. When the sliding frame 7 contacts the conveyor belt 2, the rack 15 meshes with the gear 13.

[0046] See Figure 3 and Figure 4 When the heat insulation cotton 3 is conveyed to the lower part of the sliding frame 7 by the conveyor belt 2, the output rod of the telescopic cylinder 8 extends and drives the housing 6 to move down until the sliding frame 7 contacts the conveyor belt 2, so that the heat insulation cotton 3 is in a dark environment. Since the PET film has a certain light transmission and refraction, the dark environment can reduce the interference of external light sources on the laser, and at the same time, it is easier for the image acquisition device 10 to capture the fine laser horizontal line, further improving the detection results.

[0047] When the sliding frame 7 comes into contact with the conveyor belt 2, the continued downward movement of the housing 6 will cause the rack 15 to mesh with the gear 13, thereby driving the gear 13 to rotate to complete the scanning process described above.

[0048] Similarly, when the housing 6 is reset, the rack 15 will also drive the gear 13 to rotate in the opposite direction to reset.

[0049] In one preferred embodiment, a second method for detecting the thickness of the insulation cotton 3 is provided based on the above-described embodiment two;

[0050] A pressure plate 17 is fixed to the bottom inner side of the casing 6, and a pressure sensor 18 is installed on the bottom surface of the pressure plate 17. A trigger point 22 is installed on the outer wall of the fixed shaft 12. A trigger switch 23 is installed on the inner ring of the gear 13. The trigger switch 23 controls the laser emitted by the laser head 14 to switch between horizontal lines and rays. Laser receivers are installed on both sides of the image acquisition unit 10. When the pressure sensor 18 detects a pressure signal, it controls the telescopic cylinder 8 to stop telescopic.

[0051] For details, please refer to [link / reference]. Figure 3 and Figure 5 As we know from the previous content, when the gear 13 rotates, it will emit a laser line and scan along the surface of the heat insulation cotton 3. As the gear 13 rotates, when the laser head 14 continues to rotate after scanning the heat insulation cotton 3, the trigger switch 23 on the inner ring of the gear 13 will touch the trigger point 22, so that the laser head 14 will convert the emitted laser line into a ray until it irradiates the laser receiver. Then, as the housing 6 continues to move down, the pressure plate 17 will contact the heat insulation cotton 3. At this time, the pressure sensor 18 detects the pressure signal, thereby controlling the telescopic cylinder 8 to stop telescopic, the housing 6 to stop moving down, and the gear 13 to stop rotating. In this way, the thickness of the heat insulation cotton 3 can be detected by the position of the ray emitted by the laser head 14 received by the laser receiver.

[0052] For example, when the laser beam emitted by the laser head 14 is horizontal, that is, the point of impact is at the center of the laser receiver, the thickness of the heat insulation cotton 3 is qualified. If the thickness of the heat insulation cotton 3 is thicker, the laser point of impact is located at the lower center of the laser receiver. Conversely, if the thickness of the heat insulation cotton 3 is thinner, the laser point of impact is located at the upper center of the laser receiver. This detection method is more suitable for detecting whether the thickness of the heat insulation cotton 3 is within the qualified range, and it is also more suitable for batch detection.

[0053] In one preferred embodiment, the laser receiver includes a detection block 25 mounted on the side of the image acquisition unit 10. The outer wall of the detection block 25 has a groove, and a receiver 26 is installed in the groove. The receiver 26 has a plurality of vertically arranged laser receiving points 27.

[0054] For details, please refer to [link / reference]. Figure 6 By setting multiple laser receiving points 27 on the receiver 26, different points of laser impact can be received. The laser receiving points 27 can be linear array photodiodes, which can receive the laser irradiation point on a vertical line and determine its position.

[0055] In one preferred embodiment, the outer wall of the sliding frame 7 is provided with a ventilation hole 19, and the outer wall of the housing 6 is provided with an upper through hole 20 and a lower through hole 21, and both the upper through hole 20 and the lower through hole 21 are located within the sliding range of the sliding frame 7. When the sliding frame 7 slides inside the housing 6, the ventilation hole 19 communicates with the upper through hole 20 or the lower through hole 21.

[0056] After the heat insulation cotton 3 is heated, although the air inside can be squeezed out, air or moisture may still remain inside the heat insulation cotton 3. The residual air is the reason for bubbles or wrinkles in the PET film. The upper and lower through holes and the ventilation holes 19 are used to create different air pressure environments. The specific operation is as follows.

[0057] As we know from the previous content, after the shell 6 moves down and the sliding frame 7 comes into contact with the conveyor belt 2, the continued downward movement of the shell 6 will cause the ventilation hole 19 and the lower through hole 21 to be misaligned, thus forming a sealed space inside the shell 6. As the shell 6 continues to move down, the compression of the space inside the shell 6 will cause the air pressure to gradually increase, thus forming a high-pressure environment. Under high pressure, the gas inside the heat insulation cotton will contract, thus the air bubbles in the PET film will shrink, and the protrusions may also appear wrinkled due to the compression of air, thus making the waveform of the laser horizontal line more obvious when the laser is scanning.

[0058] Then, when the pressure plate 17 comes into contact with the insulation cotton 3, the ventilation hole 19 is connected to the upper through hole 20, so that the casing 6 is connected to the outside and the internal high pressure environment is relieved.

[0059] When the housing 6 moves back to its original position, due to the setting of the spring 24, the sliding frame 7 will first press on the conveyor belt 2. As the housing 6 moves upward, the spring 24 will gradually return to its original position. The upward movement of the housing 6 will again cause the ventilation hole 19 to be misaligned with the upper through hole 20. As the housing 6 moves upward, its interior will change to a negative pressure state. Under the negative pressure state, the air inside the heat insulation cotton 3 will expand, thereby causing the air under the PET film of the heat insulation cotton 3 to expand, making the protruding parts more prominent. With the reset rotation of the gear 13, the laser head 14 will scan the surface of the heat insulation cotton 3 again, and the image acquisition device 10 will acquire the image again. In this way, the two image acquisitions are under different pressure environments, and the defects at the same location will change. By comparing the two images, the degree of residual air inside the heat insulation cotton 3 can also be detected, thereby detecting the performance quality of the heat insulation cotton 3.

[0060] It is worth mentioning that, in order to prevent the sliding frame 7 from easily detaching from the conveyor belt 2, a magnetic frame can be installed at the bottom of the sliding frame 7 and a magnetic strip can be installed inside the conveyor belt 2.

[0061] In one preferred embodiment, a dimming glass 28 is installed at the slot of the detection block 25, and the dimming glass 28 is in a de-energized state when the pressure sensor 18 does not detect a pressure signal, and the dimming glass 28 is energized when the pressure sensor 18 detects a pressure signal.

[0062] By setting up the dimming glass 28, the laser beam can be prevented from directly irradiating the laser receiving point 27. Only when the pressure sensor 18 detects the pressure signal, that is, when the housing 6 stops moving down, the gear 13 and the laser head 14 stop rotating, and the dimming glass 28 is energized and becomes transparent, can the laser beam penetrate and fall on the laser receiving point 27 for reception, so as to avoid the phenomenon of misreception or unclear receiving point.

[0063] Moreover, it is worth mentioning that, due to the setting of the dimming glass 28, if there is an uneven height on both sides of the formed heat insulation cotton 3, when the casing 6 moves down, only the pressure sensor 18 on one side of the pressure plate 17 may be triggered. In this case, only one side of the dimming glass 28 will become transparent, and the corresponding laser receiving point 27 can receive the laser signal. Thus, by checking whether the laser receiving points 27 in the two detection blocks 25 can receive the signal, it is possible to detect whether the thickness on both sides of the heat insulation cotton 3 is uniform, further improving the detection accuracy.

[0064] In one preferred embodiment, the outer plane of the dimming glass 28 is designed as a concave transparent surface.

[0065] See details Figure 6By using the concave surface to refract the laser beam outwards, the distance between the laser beam points can be increased, thereby detecting finer differences and making the detection results more precise.

[0066] In one preferred embodiment, limiting hooks 32 are installed on the top surfaces of the detection platforms 1 located on both sides of the conveyor belt 2, and the limiting hooks 32 ensure that the conveyor belt 2 and the detection platform 1 always slide and fit together.

[0067] See details Figure 2 The limit hook 32 can limit the conveyor belt 2 to prevent the housing 6 and sliding frame 7 from lifting the conveyor belt 2 when they move upward.

[0068] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the thickness of thermal insulation cotton under hot pressing, comprising a detection platform (1) and a conveyor belt (2) for conveying thermal insulation cotton (3), wherein the conveyor belt (2) passes over the top plane of the detection platform (1), characterized in that, Also includes: The thickness detection component is used to detect the thickness of the insulation cotton (3) when the conveyor belt (2) stops; The surface detection component includes a laser scanning unit and an image acquisition unit. The laser scanning unit is tilted toward the surface of the heat insulation cotton (3) and emits a laser line and moves along its surface. The image acquisition unit is located directly above the heat insulation cotton (3) and acquires an image of the trajectory of the laser line. The surface detection assembly includes a gantry (5) fixed to the top of the detection platform (1), and the gantry (5) spans across the conveyor belt (2). The image acquisition unit includes a fixed rod (9) fixed to the bottom center of the gantry (5). An image acquisition device (10) is installed at the bottom of the fixed rod (9). The laser scanning unit has two sets and is symmetrically arranged about the fixed rod (9). The laser scanning unit includes a vertical rod (11) fixed to the bottom of one side of the gantry (5). A fixed shaft (12) is fixed to the bottom outer wall of the vertical rod (11). A reciprocating gear (13) is installed on the outer wall of the fixed shaft (12). A laser head (14) is fixed to the outer wall of the gear (13), and the laser direction of the laser head (14) is along the diameter direction of the gear (13). A telescopic cylinder (8) is installed on the top of the gantry (5). The output shaft of the telescopic cylinder (8) passes through the bottom of the gantry (5) and is fixed with a housing (6). A through hole is opened on the top of the housing (6) for the vertical rod (11) and the fixed rod (9) to pass through and slide. A sliding cavity (16) is opened on the bottom of the housing (6). A sliding frame (7) is vertically slidably installed on the inner wall of the sliding cavity (16). A spring (24) is connected to the top of the sliding frame (7) and the inner top of the sliding cavity (16). A rack (15) is installed on the inner wall of the housing (6). When the sliding frame (7) contacts the conveyor belt (2), the rack (15) meshes with the gear (13). The outer wall of the sliding frame (7) is provided with a ventilation hole (19), and the outer wall of the casing (6) is provided with an upper through hole (20) and a lower through hole (21). The upper through hole (20) and the lower through hole (21) are both located within the sliding range of the sliding frame (7). When the sliding frame (7) slides inside the casing (6), the ventilation hole (19) communicates with the upper through hole (20) or the lower through hole (21).

2. The heat insulation cotton hot-press thickness detection device according to claim 1, characterized in that: The thickness detection component includes three sets of cylinders (29) mounted on the top of the detection platform (1) by a bracket, and the three sets of cylinders (29) correspond to the two sides and the middle position of the heat insulation cotton (3) respectively. The bottom end of the output shaft of the cylinder (29) is fixed with a pressure strip (30), and the side of the pressure strip (30) is equipped with a trigger probe (31).

3. The heat insulation cotton hot-pressing thickness detection device according to claim 1, characterized in that: A pressure plate (17) is fixed to the bottom of the inner side of the casing (6), and a pressure sensor (18) is installed on the bottom surface of the pressure plate (17). A trigger point (22) is installed on the outer wall of the fixed shaft (12). A trigger switch (23) is installed on the inner ring of the gear (13). The trigger switch (23) controls the laser emitted by the laser head (14) to switch between horizontal lines and rays. Laser receivers are installed on both sides of the image acquisition device (10). When the pressure sensor (18) detects a pressure signal, it controls the telescopic cylinder (8) to stop telescopic.

4. The heat insulation cotton hot-press thickness detection device according to claim 3, characterized in that: The laser receiver includes a detection block (25) installed on the side of the image acquisition unit (10). The outer wall of the detection block (25) is provided with a groove, and a receiver (26) is installed in the groove. The receiver (26) has multiple laser receiving points (27) arranged vertically.

5. The heat insulation cotton hot-press thickness detection device according to claim 4, characterized in that: A dimming glass (28) is installed at the slot of the detection block (25). When the pressure sensor (18) does not detect a pressure signal, the dimming glass (28) is in a de-energized state. When the pressure sensor (18) detects a pressure signal, the dimming glass (28) is energized.

6. The heat insulation cotton hot-press thickness detection device according to claim 5, characterized in that: The outer plane of the dimming glass (28) is designed as a concave transparent surface.

7. The heat insulation cotton hot-press thickness detection device according to any one of claims 1-6, characterized in that: Limiting hooks (32) are installed on the top surface of the detection platform (1) located on both sides of the conveyor belt (2), and the limiting hooks (32) make the conveyor belt (2) and the detection platform (1) always slide and fit together.

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