A papermaking basis weight detection system

Abstract

The application relates to a paper quantitative detection system, in particular to the field of paper detection equipment, which comprises a detection table, a conveying mechanism and a transfer mechanism arranged on the detection table, and a weighing mechanism arranged on one side of the transfer mechanism, the conveying mechanism is used for conveying paper, the conveying direction of the conveying mechanism is parallel to the surface of the detection table; the transfer mechanism comprises a transfer assembly and a punching assembly, the transfer assembly is used for moving the to-be-detected paper piece cut from the paper to a detection station from a punching station, the punching assembly comprises a linear driving piece arranged on the detection table and a punching piece arranged on the transfer assembly, the movable end of the linear driving piece faces the detection table, and the movable end moving direction is perpendicular to the surface of the detection table, and the punching piece is slidably arranged on the transfer assembly in a direction perpendicular to the surface of the detection table; the weighing mechanism is located at the detection station and is used for weighing the mass of the to-be-detected paper piece, and the application makes the quantitative detection process of the paper more convenient.

Description

Technical Field

[0001] This application relates to the field of paper testing equipment, and in particular to a paper basis weight testing system. Background Technology

[0002] Basis weight is one of the most basic performance indicators of paper and is often regarded as a characteristic parameter of paper. Basis weight refers to the weight of paper or paperboard per square meter, measured in g / m². The basis weight affects the technical performance of paper. When the basis weight is significantly lower than the standard specifications, not only is bleed-through more likely to occur, but paper breaks may also occur due to insufficient mechanical strength. Therefore, the basis weight affects paper production, determines whether the final product quality is up to standard, and is directly related to the product's cost and economic benefits.

[0003] The quantitative measurement method is as follows: ten 100cm² paper pieces are cut from the paper to be tested using a punch-type circular quantitative sampler. The ten paper pieces are then weighed on an analytical balance. The weight is multiplied by ten to obtain the grammage per square meter, i.e., the paper's basis weight. To ensure measurement accuracy and minimize damage to the instrument, the ten paper pieces need to be punched ten times.

[0004] The basis weight is affected by various parameters in the production process. During actual paper production, paper mills test the basis weight of freshly produced paper. Production can only continue after the basis weight meets the requirements. Therefore, operators need to cut the paper and sequentially use a circular basis weight sampler to cut ten sheets from each sheet. The sheets are then weighed and the basis weight calculated. If the basis weight does not meet the requirements, the process parameters need to be adjusted based on the results, and production is restarted. This process is repeated until the basis weight meets the requirements. Therefore, the basis weight testing process is quite cumbersome and requires a significant amount of the operator's time. Summary of the Invention

[0005] To simplify the quantitative detection process, this application provides a quantitative detection system for papermaking.

[0006] The papermaking basis weight detection system provided in this application adopts the following technical solution:

[0007] A paper basis weight detection system includes a detection table, a conveying mechanism and a transfer mechanism disposed on the detection table, and a weighing mechanism disposed on one side of the transfer mechanism. The conveying mechanism is used to convey paper, and the conveying direction of the conveying mechanism is parallel to the surface of the detection table. The transfer mechanism includes a transfer component and a cutting component. The transfer component is used to move the paper pieces to be tested cut from the paper from the cutting station to the detection station. The cutting component includes a linear drive component disposed on the detection table and a cutting component disposed on the transfer component. The movable end of the linear drive component faces the detection table and the moving direction of the movable end is perpendicular to the surface of the detection table. The cutting component is slidably disposed on the transfer component in a direction perpendicular to the surface of the detection table. The weighing mechanism is located at the detection station and is used to weigh the mass of the paper pieces to be tested.

[0008] By adopting the above technical solution, when testing the basis weight of paper, the operator only needs to place the paper strip to be tested on the testing table. The conveying mechanism drives the paper strip to move. After one end of the paper strip moves to the punching station, the paper strip stops moving. The punching component cuts off a piece of paper to be tested from the paper strip. Then, the transfer component moves the piece of paper to be tested to the weighing mechanism at the testing station. Then, the conveying mechanism continues to drive the paper strip to move a certain distance and then stops. The punching component and the transfer component repeat the above actions, and the cycle continues until ten pieces of paper to be tested are cut off and all of them are transferred to the weighing mechanism. Finally, the operator only needs to read the reading and multiply it by ten to get the basis weight of the paper. Therefore, the testing process is simpler and reduces the workload of the operator. The operator can use this time to carry out other adjustments, resulting in high time utilization.

[0009] Optionally, the conveying mechanism includes two conveyor belts disposed on the testing platform, the conveyor belts being arranged in parallel and spaced apart, the belt surface of the conveyor belts being parallel to the surface of the testing platform, and the belt surface of the conveyor belts on the side closer to the testing platform abutting against the surface of the testing platform.

[0010] By adopting the above technical solution, during testing, the paper strip is located between two conveyor belts, with the bottoms of the two conveyor belts pressed against both sides of the paper strip. The synchronous operation of the two conveyor belts can drive the paper strip to move, thereby cutting 10 test pieces from the paper strip. When the punching component is working, the conveyor belt remains stationary, and the conveyor belt pressed against the paper strip can fix the paper strip, thereby reducing the possibility of the paper strip moving during punching, making the area of ​​the cut test pieces stable, which helps to improve the accuracy of the test results.

[0011] Optionally, the conveyor belt has anti-slip patterns on its surface, and the anti-slip patterns on the side of the conveyor belt closest to the testing platform abut against the surface of the testing platform.

[0012] By adopting the above technical solution, the anti-slip texture can reduce the possibility of relative slippage between the conveyor belt and the paper, thereby avoiding changes in the area of ​​the cut paper piece due to paper wrinkles caused by relative slippage, which would reduce the accuracy of the measurement results.

[0013] Optionally, the transfer assembly includes a rotating power component mounted on the inspection table, a turntable mounted on the output end of the rotating power component, and a suction cup mounted on one side of the turntable. The rotating power component is mounted on the side of the inspection table near the punching station. The rotation axis of the output end of the rotating power component is perpendicular to the surface of the inspection table. The turntable is coaxially connected to the output end of the rotating power component. Multiple punching parts are provided and arranged in a circumferential array around the turntable. The number of suction cups is the same as the number of punching parts. Each suction cup is mounted on one of the punching parts, and the opening of the suction cup faces the inspection table.

[0014] By adopting the above technical solution, the extended movable end of the linear drive can push the punching component downward to punch the paper strip. After punching, the suction cup holds the cut paper piece to be tested. Then, the rotation of the turntable drives the punching component to move, thereby moving the paper piece to be tested on the suction cup to the weighing mechanism. After the movement is completed, the next punching component on the turntable is located directly below the movable end of the linear drive. Therefore, the unloading process of the paper piece to be tested and the next punching process can be carried out simultaneously, making the interval between the two punching processes shorter, which helps to improve the detection efficiency.

[0015] Optionally, the punching component includes a cutter and a spring. The cutter is arranged in a ring shape, the suction cup is fixedly connected to the inside of the cutter, the cutter is slidably connected to the turntable in a direction perpendicular to the surface of the inspection table, and the spring is connected between the cutter and the turntable.

[0016] By adopting the above technical solution, the downward movement of the cutter can cut out a test paper piece with the same shape as the cutter. After the punching is completed, the movable end of the linear drive moves upward, and the spring setting allows the cutter to move upward to reset. When the cutter enters the punching station again, it can move downward again to punch the paper strip, ensuring the punching effect. In addition, the spring setting can also prevent the cutter from moving when the turntable rotates, and the cutter from moving the paper strip, which would cause the area of ​​the subsequently punched test paper pieces to change, affecting the accuracy of the test results.

[0017] Optionally, a wire mesh is provided at the opening of the suction cup.

[0018] By adopting the above technical solution, since the paper is relatively soft, the screen can intercept the paper to be tested, avoiding the paper to be tested being directly sucked into the suction cup when the suction cup is vacuumed, which would affect the normal operation of the suction cup and would also cause the final measured quality to be smaller and the error to increase.

[0019] Optionally, a cutting groove is provided on the testing table at the punching station. The shape of the cutting groove is adapted to the cutting blade. When the blade of the cutting blade abuts against the bottom wall of the cutting groove, the suction cup abuts against the surface of the testing table.

[0020] By adopting the above technical solution, the cutter and the groove work together to enhance the punching effect, reduce damage to the cutter, and help extend the service life of the cutter. At the same time, it can keep the cut edge of the paper to be tested flat, which helps to ensure the accuracy of the test results.

[0021] Optionally, the linear drive is a telescopic cylinder, and a push rod is connected to the piston rod of the linear drive. The push rod and the piston rod of the linear drive are arranged parallel to each other at intervals. The distance between the push rod and the piston rod of the linear drive is equal to the distance between the two punching parts. The turntable is provided with a clearance hole for the push rod to pass through.

[0022] By adopting the above technical solution, when the piston rod of the linear drive moves down, it drives the push rod to move down. Therefore, while the linear drive drives the cutter to punch the paper strip, the push rod can push the paper piece to be tested stuck in the cutter onto the weighing mechanism, thus avoiding the test result being too small due to the paper piece being stuck in the cutter.

[0023] Optionally, a guide plate is provided on the testing platform at the starting end of the conveying mechanism. There are two guide plates, which are spaced apart, and the distance between the two guide plates is not less than the distance between the two conveyor belts.

[0024] By adopting the above technical solution, the paper strip is placed between two guide plates. When the conveying mechanism moves the paper strip, the guide plates can guide the paper strip so that it can move towards the punching station, reducing the possibility of deviation and helping the inspection process to proceed smoothly.

[0025] Optionally, a sensor is installed on the detection table at the punching station. The sensor is used to sense whether there is paper on the detection table. A controller electrically connected to the sensor is installed on the detection table. The controller is electrically connected to the control system of the conveyor belt.

[0026] By adopting the above technical solution, in the initial state, the sensor detects that there is no paper on the detection table; during detection, the device is started, the conveyor belt runs continuously, and the conveyor belt drives the paper strip to move. When one end of the paper strip moves to the punching station, the sensor detects the paper and then transmits the signal to the controller. The controller makes the conveyor belt run intermittently, so that the subsequent punching and transfer process can proceed smoothly. Therefore, the setting of the sensor and controller makes the operation of the device more intelligent, reduces manual intervention, and is more convenient to use.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When testing the basis weight of paper, the operator only needs to place the freshly produced paper strip at the starting end of the testing table. The conveying mechanism then moves the paper strip to the punching station. The punching component cuts the paper sheet to be tested from the paper strip. Then, the transfer component moves the paper sheet to be tested to the weighing mechanism. The punching and transfer processes are repeated until all ten paper sheets to be tested have been moved to the weighing mechanism. The operator then multiplies the mass measured by the weighing mechanism by ten to obtain the basis weight of the paper. Therefore, the testing process is simple and reduces the time spent by the operator during the testing process, allowing the operator to use this time for other debugging work, which is more convenient.

[0029] 2. The conveyor belt not only moves the paper strip but also fixes it during punching, thus ensuring the punching effect and helping to ensure the accuracy of the test results.

[0030] 3. The turntable design allows the punching process and the feeding process of the paper to be tested to be carried out simultaneously, thus reducing the interval between the two punching processes, thereby reducing the time required for testing and helping to improve testing efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the overall structure from another perspective of an embodiment of this application;

[0033] Figure 3 This is a cross-sectional view of the cutting edge in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the punching part in the embodiments of this application;

[0035] Figure 5 This is a schematic diagram of the structure when the cutter and the bottom wall of the groove abut against each other according to an embodiment of this application;

[0036] Figure 6 This is a schematic diagram of the structure of the connecting rod and push rod in the embodiment of this application.

[0037] Reference numerals: 1. Testing table; 11. Groove; 12. Support; 13. Sensor; 14. Controller; 15. Alarm; 2. Conveyor belt; 21. Anti-slip texture; 3. Transfer assembly; 31. Rotary power component; 32. Turntable; 321. Guide hole; 322. Clearance hole; 33. Suction cup; 331. Wire mesh; 4. Punching assembly; 41. Linear drive component; 411. Pressure plate; 42. Punching part; 421. Cutter; 4211. Guide rod; 4212. Ring; 4213. Connecting column; 4214. Support rod; 422. Spring; 5. Weighing mechanism; 6. Connecting rod; 61. Horizontal bar; 62. Vertical bar; 63. Connecting rod; 7. Push rod; 71. Push block; 711. Clearance groove; 8. Guide plate; 81. Arc plate; 9. Paper strip; 10. Paper to be tested. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the accompanying drawings.

[0039] This application discloses a papermaking basis weight detection system. (Refer to...) Figure 1 The system includes a testing platform 1, a conveying mechanism, a transfer mechanism, and a weighing mechanism 5. The testing platform 1 is placed horizontally on the ground. The conveying mechanism is positioned on the testing platform 1, with its conveying direction parallel to the surface of the testing platform 1. The conveying mechanism is used to convey paper strips 9. A cutting station is located at the end of the conveying mechanism on the testing platform 1, and a testing station is located outside the conveying mechanism. The transfer mechanism is positioned on the testing platform 1, between the cutting station and the testing station. The transfer mechanism can cut a 100cm² piece of paper to be tested 10 from the paper strip 9 and move the piece of paper to be tested 10 from the cutting station to the testing station. The weighing mechanism 5 is located at the testing station on the testing platform 1 and is used to receive the piece of paper to be tested 10 and weigh its mass. Therefore, when testing the basis weight of paper, simply place the paper strip 9 on the testing table 1, and the conveying mechanism will move the paper strip 9 to the punching station. Then the paper strip 9 moves intermittently, and the device continuously punches and transfers until ten sheets of paper to be tested 10 are moved to the weighing mechanism 5. The operator can read the value and multiply it by ten to obtain the basis weight of the paper to be tested, making the testing process simpler.

[0040] Reference Figure 2The conveying mechanism includes two conveyor belts 2 mounted on the top surface of the inspection platform 1. The conveyor belts 2 are parallel and spaced apart, with their surfaces horizontal and the bottom surfaces abutting against the top surface of the inspection platform 1. During inspection, a strip of paper 9 is cut from the produced paper, ensuring its width is greater than the distance between the two conveyor belts 2. The strip 9 is then placed on the inspection platform 1 between the two conveyor belts 2 along its length. The conveyor belts 2 are then turned on. Because the bottom surfaces of the two conveyor belts 2 are pressed against the sides of the end of the strip 9, the movement of the conveyor belts 2 moves the strip 9. The conveyor belts 2 have anti-slip textures 21, composed of multiple rubber strips adhered to the surface of the conveyor belts 2 along their width. The rubber strips at the bottom of the conveyor belts 2 abut against the surface of the inspection platform 1. Therefore, the anti-slip textures 21 reduce the possibility of relative slippage between the strip 9 and the conveyor belts 2. In other embodiments, the conveying mechanism may also include a telescopic cylinder and a finger cylinder disposed at the end of the piston rod of the telescopic cylinder. The finger cylinder can clamp the end of the paper strip 9, and then the movement of the piston rod of the telescopic cylinder can drive the paper strip 9 to move.

[0041] To reduce the possibility of paper strip 9 deviating during movement, a guide plate 8 is bolted to the side of the detection table 1 near the starting end of the conveyor belt 2. The guide plate 8 is arranged along the length of the conveyor belt 2, and two guide plates 8 are provided and spaced parallel to each other. The guide plates 8 guide the movement of the paper strip 9. The distance between the two guide plates 8 is greater than the distance between the two conveyor belts 2. Therefore, by adjusting the distance between the two guide plates 8 to be the same as the width of the paper strip 9, the two sides of the paper strip 9 can abut against the two conveyor belts 2 after being placed in, resulting in good conveying effect. To reduce the possibility of the paper strip 9 being scratched during movement, an arc-shaped plate 81 is welded to the end of each guide plate 8 away from the conveyor belt 2. The ends of the two arc-shaped plates 81 away from the conveyor belt 2 are bent towards each other.

[0042] Reference Figure 2 The transfer mechanism includes a punching assembly 4 and a transfer assembly 3. The punching assembly 4 includes a linear drive 41 and a punching component 42. The linear drive 41 is a telescopic cylinder. A bracket 12 is provided on the inspection table 1, and the linear drive 41 is fixedly connected to the bracket 12. The linear drive 41 is located directly above the punching station, and the piston rod of the linear drive 41 is vertically downward. A horizontally arranged pressure plate 411 is connected to the end of the piston rod of the linear drive 41. The punching component 42 is slidably connected to the transfer assembly 3 in the vertical direction. Therefore, when the punching component 42 is located directly below the piston rod of the linear drive 41, the piston rod of the linear drive 41 moves downward, which can push the punching component 42 downward. The punching component 42 can punch the paper strip 9 placed on the inspection station, thereby cutting out the paper piece 10 to be tested.

[0043] Reference Figure 2 and Figure 3The transfer assembly 3 includes a rotating power component 31, a turntable 32, and suction cups 33. The rotating power component 31 is a servo motor, which is fixedly connected to the bracket 12 by bolts, and its output shaft faces vertically downwards. The turntable 32 is coaxially fixedly connected to the output shaft of the rotating power component 31, thus the turntable 32 is horizontally positioned and located above the conveyor belt 2. Six sets of punching components 42 are arranged in a circumferential array on the turntable 32, and the punching components 42 are slidably connected to the circumference of the turntable 32 in the vertical direction. There are also six suction cups 33, and each suction cup 33 is fixedly connected to a punching component 42, with the opening of the suction cup 33 facing vertically downwards. Therefore, the punching component 42 can drive the suction cups 33 to move. After the punching component 42 cuts out the paper piece 10 to be tested, the suction cup 33 can hold the paper piece 10 to be tested, and the paper piece 10 to be tested can be transferred as the turntable 32 rotates.

[0044] Reference Figure 4 The punching component 42 includes a cutter 421 and a spring 422. The cutter 421 is located below the turntable 32 and is ring-shaped 4212. The bottom of the cutter 421 is the blade. Vertical guide rods 4211 are welded to both sides of the top of the cutter 421. Six sets of guide holes 321 are opened on the circumference of the turntable 32. The six sets of guide holes 321 are arranged in a circular array. Each set of guide holes 321 includes two spaced guide holes 321, and the distance between the two guide holes 321 is the same as the distance between the two guide rods 4211. The two guide rods 4211 pass through the two guide holes 321 respectively, thereby slidingly connecting the cutter 421 to the turntable 32. The top of the guide rod 4211 is welded with a ring 4212. When the pressure plate 411 at the end of the piston rod of the linear drive component 41 moves down, the pressure plate 411 abuts against the ring 4212, which can push the cutter 421 down more stably. Vertical connecting posts 4213 are welded to both sides of the top wall of the cutter 421. The connecting posts 4213 are shorter than the guide rod 4211. Two springs 422 are provided, each connected between its corresponding connecting post 4213 and the bottom wall of the turntable 32. Under normal conditions, the springs 422 are in a stretched state, causing the top of the connecting post 4213 to press firmly against the turntable 32. The springs 422 allow the cutter 421 to automatically return to its original position after moving downwards, facilitating the next cutting operation.

[0045] To enhance the punching effect, refer to Figure 2 and Figure 3A cutting groove 11 is provided at the punching station on the testing table 1. The cutting groove 11 is an annular groove, and its diameter is the same as that of the cutter 421. A support rod 4214 is welded to the inner wall of the cutter 421. A suction cup 33 is fixedly connected to the end of the support rod 4214. The opening of the suction cup 33 faces downward, and the bottom of the suction cup 33 is located above the bottom wall of the cutter 421. The distance between the bottom of the suction cup 33 and the bottom wall of the cutter 421 is the same as the depth of the cutting groove 11. Therefore, when the blade of the cutter 421 abuts against the bottom wall of the cutting groove 11, the bottom of the suction cup 33 just abuts against the paper piece 10 to be tested on the testing table 1, so the suction cup 33 can better pick up the paper piece 10 to be tested. A wire mesh 331 is connected to the bottom of the suction cup 33. The wire mesh 331 can intercept the paper piece 10 to be tested and prevent it from being sucked into the suction cup 33.

[0046] Reference Figure 2 Initially, one of the cutters 421 and the cutting groove 11 are coaxial. When one end of the paper strip 9 moves to the punching station under the action of the conveyor belt 2, the conveyor belt 2 stops running. Then, the piston rod of the linear drive 41 moves down, pushing the cutter 421 down until the blade of the cutter 421 abuts against the bottom wall of the cutting groove 11, at which point the punching is completed. Then, the suction cup 33 starts to draw a vacuum, and the suction cup 33 picks up the paper piece 10 to be tested. Then, the piston rod of the linear drive 41 retracts, and under the action of the spring 422, the cutter 421 moves upward, driving the paper piece 10 to be tested to move upward. Then, the rotary power component 31 drives the turntable 32 to rotate 60°, so that the next cutter 421 moves to the punching station, and at the same time, the paper piece 10 to be tested moves to the detection station. Then, the suction cup 33 stops drawing a vacuum, and the paper piece 10 to be tested falls onto the weighing mechanism 5 in the detection station under the action of gravity. Then, the above actions are repeated to complete the detection process.

[0047] Since there are six suction cups 33, and the top of each suction cup 33 is connected to an air source via a conduit, the rotating disk 32 will drive the suction cups 33 to rotate when it rotates, thereby driving the conduits to rotate. As a result, the conduits are prone to entanglement, which affects the normal progress of the detection process. To overcome this problem, during each paper weight measurement, the rotating power component 31 drives the rotating disk 32 to rotate in the same direction, so that the punching and feeding processes can be carried out simultaneously, improving detection efficiency. After ten punching and feeding processes are completed, the detection is completed. At this time, the rotating power component 31 drives the rotating disk 32 to rotate in the opposite direction, so that the rotating disk 32 returns to the state before detection, thereby avoiding the problem of conduit entanglement after multiple detections.

[0048] During the above process, after the suction cup 33 stops working, the paper to be tested 10 may get stuck in the cutter 421, affecting the smooth progress of the testing process. To overcome this problem, refer to Figure 5 and Figure 6A connecting rod 6 is fixedly connected to the end of the piston rod of the linear drive component 41, and a push rod 7 is connected to the end of the connecting rod 6. The connecting rod 6 includes a horizontal rod 61, a vertical rod 62, and a connecting rod 63. The horizontal rod 61 is horizontally arranged, and one end is fixedly connected to the pressure plate 411 at the end of the piston rod of the linear drive component 41. The vertical rod 62 is vertically arranged, and its bottom end is welded to the end of the horizontal rod 61 away from the pressure plate 411. The connecting rod 63 is horizontally arranged, and one end is welded to the top of the vertical rod 62. The connecting rod 63 is located on the side of the vertical rod 62 away from the horizontal rod 61. The push rod 7 is vertically arranged, and its top end is welded to the end of the connecting rod 63 away from the vertical rod 62. The push rod 7 is located directly above the cutter 421 at the inspection station. To avoid interference between the push rod 7 and the turntable 32 when the push rod 7 moves, the turntable 32 is provided with clearance holes 322 for the push rod 7 to pass through. There are six clearance holes 322, and each clearance hole 322 is located between two adjacent guide holes 321.

[0049] Reference Figure 2 Since the vertical rod 62, connecting rod 63, and push rod 7 together form a U-shaped rod, and the length of connecting rod 63 is greater than the difference between the outer and inner radii of the ring 4212, the pressure plate 411 can drive the push rod 7 to move downward when it moves downward. Furthermore, the push rod 7 does not drive the cutter 421 above the detection station to move downward. Therefore, relative sliding can occur between the push rod 7 and the cutter 421 above the detection station, thereby pushing out the stuck paper sheet 10. A pushing block 71 is welded to the bottom of the push rod 7. The pushing block 71 is an annular block coaxially arranged with the push rod 7. The outer diameter of the pushing block 71 is smaller than the diameter of the cutter 421. A clearance groove 711 for avoiding the support rod 4214 is provided at the bottom of the pushing block 71. The setting of the pushing block 71 increases the contact area between the push rod 7 and the paper sheet 10, making it easier to push out the paper sheet 10.

[0050] In other embodiments, the transfer component 3 can also be a telescopic cylinder. The piston rod end of the telescopic cylinder can move between the punching station and the inspection station. When the piston rod end of the telescopic cylinder is at the punching station, the linear drive 41 pushes the cutter 421 downward to punch. Then, the suction cup 33 picks up the paper piece 10 to be tested, the piston rod of the linear drive 41 moves upward, and the spring 422 resets the cutter 421. Then, the piston rod of the telescopic cylinder extends, so that the cutter 421 moves the paper piece 10 to be tested directly above the inspection station. Then, the suction cup 33 stops vacuuming, so that the paper piece 10 to be tested falls onto the weighing mechanism 5, and the inspection can be completed smoothly.

[0051] In order for the device to operate on its own, refer to Figure 5A sensor 13 is installed at the end of the conveyor belt 2 on the detection table 1. The detection end of the sensor 13 faces the detection table 1 between the two conveyor belts 2. The sensor 13 is used to detect whether there is paper on the detection table 1. A controller 14 is also installed on the detection table 1. The sensor 13 and the control system of the conveyor belt 2 are electrically connected to the controller 14. Therefore, after the sensor 13 detects paper on the detection table 1, the sensor 13 transmits a signal to the controller 14. The controller 14 causes the conveyor belt 2 to start running intermittently, which facilitates the subsequent punching and transfer process. In addition, an alarm 15 is installed on the detection table 1. The alarm 15 is electrically connected to the controller 14. After the conveyor belt 2 runs intermittently ten times, the alarm 15 will sound, thus reminding the operator that the detection process has been completed.

[0052] The weighing mechanism 5 is installed on the testing station of the testing table 1. The weighing mechanism 5 is an analytical balance, which is located below the cutter 421. After the paper piece 10 to be tested in the cutter 421 falls onto the tray on the top of the analytical balance, the analytical balance can measure the mass of the paper piece 10 to be tested.

[0053] The implementation principle of a papermaking basis weight detection system according to an embodiment of this application is as follows: one end of a paper strip 9 is placed between two guide plates 8, with the length direction of the paper strip 9 parallel to the length direction of the conveyor belt 2; then the device is turned on, the conveyor belt 2 starts to run, and the bottom of the two conveyor belts 2 respectively press against the two sides of the paper strip 9. The operation of the conveyor belt 2 drives the paper strip 9 to move. When the end of the paper strip 9 moves to the punching station, the sensor 13 detects the paper strip 9, and therefore the controller 14 causes the conveyor belt 2 to start intermittent operation.

[0054] After the paper strip 9 stops moving, the piston rod of the linear drive 41 moves downward. The piston rod drives the cutter 421 directly above the detection station to move downward through the pressure plate 411 until the blade at the bottom of the cutter 421 moves into the cutting groove 11 of the punching station, cutting a circular piece of paper 10 to be tested on the paper strip 9. At this time, the bottom of the suction cup 33 is in contact with the piece of paper 10 to be tested, and the suction cup 33 starts to draw a vacuum, holding the piece of paper 10 to be tested. Then the piston rod of the linear drive 41 moves upward to reset. Under the action of the spring 422, the cutter 421 moves upward to reset, thereby driving the piece of paper 10 to be tested to move upward. Then the rotation The power unit 31 drives the turntable 32 to rotate, causing the lower cutter 421 to move to the punching station. The cutter 421 that has completed the punching process moves to the inspection station. At this time, the suction cup 33 stops vacuuming, and then the piston rod of the linear drive unit 41 extends. The cutter 421 at the punching station moves down to punch the paper strip 9. When the piston rod of the linear drive unit 41 extends, the piston rod drives the push rod 7 to move down. The push rod 7 drives the push block 71 to move down. The push block 71 pushes the paper piece 10 to be tested, which is stuck in the cutter 421, into the tray at the top of the analytical balance. Therefore, the punching and unloading processes can be carried out simultaneously.

[0055] Then the cutting and feeding actions are repeated until all ten test paper pieces 10 are placed on the analytical balance. Then the conveyor belt 2 stops running, and the rotating power component 31 drives the turntable 32 to rotate in the opposite direction to the state before testing. The alarm 15 starts to sound, indicating to the operator that the testing process has been completed. The operator only needs to multiply the reading of the analytical balance by ten to obtain the basis weight of the paper. Therefore, the paper basis weight testing process is more convenient.

[0056] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A papermaking basis weight detection system, characterized in that: It includes a testing table (1), a conveying mechanism and a transfer mechanism set on the testing table (1), and a weighing mechanism (5) set on one side of the transfer mechanism. The conveying mechanism is used to convey paper, and the conveying direction of the conveying mechanism is parallel to the surface of the testing table (1). The transfer mechanism includes a transfer component (3) and a punching component (4). The transfer component (3) is used to move the paper piece (10) cut from the paper from the punching station to the inspection station. The punching component (4) includes a linear drive (41) disposed on the inspection table (1) and a punching component (42) disposed on the transfer component (3). The movable end of the linear drive (41) faces the inspection table (1) and the moving direction of the movable end is perpendicular to the surface of the inspection table (1). The punching component (42) is slidably disposed on the transfer component (3) in a direction perpendicular to the surface of the inspection table (1). The transfer assembly (3) includes a rotating power component (31) disposed on the inspection table (1), a turntable (32) disposed at the output end of the rotating power component (31), and a suction cup (33) disposed on one side of the turntable (32). The rotating power component (31) is disposed on the side of the inspection table (1) near the punching station. The rotation axis of the output end of the rotating power component (31) is perpendicular to the surface of the inspection table (1). The turntable (32) is coaxially connected to the output end of the rotating power component (31). Multiple punching parts (42) are disposed and arranged in a circumferential array on the periphery of the turntable (32). The number of suction cups (33) is the same as the number of punching parts (42). Each suction cup (33) is disposed on one of the punching parts (42). The opening of the suction cup (33) faces the inspection table (1). The weighing mechanism (5) is located at the testing station and is used to weigh the mass of the paper sheet (10) to be tested.

2. The papermaking quantitative detection system according to claim 1, characterized in that: The conveying mechanism includes a conveyor belt (2) disposed on the testing table (1). There are two conveyor belts (2) disposed at intervals and parallel to each other. The belt surface of the conveyor belt (2) is parallel to the surface of the testing table (1). The belt surface of the conveyor belt (2) on the side closer to the testing table (1) abuts against the surface of the testing table (1).

3. The papermaking quantitative detection system according to claim 2, characterized in that: The conveyor belt (2) has anti-slip texture (21) on its surface. The anti-slip texture (21) on the side of the conveyor belt (2) close to the testing table (1) abuts against the surface of the testing table (1).

4. The papermaking quantitative detection system according to claim 1, characterized in that: The punching component (42) includes a cutter (421) and a spring (422). The cutter (421) is arranged in a ring shape. The suction cup (33) is fixedly connected to the inside of the cutter (421). The cutter (421) is slidably connected to the turntable (32) in a direction perpendicular to the surface of the detection table (1). The spring (422) is connected between the cutter (421) and the turntable (32).

5. The papermaking quantitative detection system according to claim 1, characterized in that: The suction cup (33) has a wire mesh (331) at its opening.

6. The papermaking quantitative detection system according to claim 4, characterized in that: The testing table (1) has a cutting groove (11) at the punching station. The shape of the cutting groove (11) is adapted to the cutter (421). When the blade of the cutter (421) abuts against the bottom wall of the cutting groove (11), the suction cup (33) and the surface of the testing table (1) abut against each other.

7. The papermaking quantitative detection system according to claim 1, characterized in that: The linear drive (41) is a telescopic cylinder. A push rod (7) is connected to the piston rod of the linear drive (41). The push rod (7) and the piston rod of the linear drive (41) are arranged parallel to each other at intervals. The distance between the push rod (7) and the piston rod of the linear drive (41) is equal to the distance between the two punching parts (42). The turntable (32) is provided with a clearance hole (322) for the push rod (7) to pass through.

8. A papermaking quantitative detection system according to claim 2, characterized in that: The testing platform (1) is provided with a guide plate (8) at the starting end of the conveying mechanism. There are two guide plates (8) and they are spaced apart. The distance between the two guide plates (8) is not less than the distance between the two conveyor belts (2).

9. A papermaking quantitative detection system according to claim 2, characterized in that: A sensor (13) is installed on the detection table (1) at the punching station. The sensor (13) is used to sense whether there is paper on the detection table (1). A controller (14) is installed on the detection table (1) and is electrically connected to the sensor (13). The controller (14) is electrically connected to the control system of the conveyor belt (2).

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