A layered dispensing positioning system and method for transporting paper-faced gypsum board

Abstract

The application discloses a layered and distributed positioning and conveying system for paper-faced gypsum board, which comprises a control device, a speed sensor installed on a distribution bridge, a variable frequency motor and a lift, and an encoder installed on the lift, wherein the encoder outputs one pulse signal per rotation, and the control device is pre-stored with the number of pulse signals corresponding to the height of the dryer. The control device receives the number of pulse signals of the encoder and judges the lifting direction and distance of the lift according to the comparison result of the number of pulse signals and the number of pulse signals corresponding to the preset height, and controls the variable frequency motor to change the conveying speed of the distribution bridge according to the lifting distance and the speed detection value of the speed sensor. The gypsum board layer changing and conveying are linked and locked, and the layer changing and the board conveying are simultaneously completed at the same time. When the distribution bridge is connected to the target drying layer inlet, the board is directly sent into the dryer without waiting, thereby saving time and improving production efficiency.

Description

Technical Field

[0001] This invention relates to the field of gypsum board production line technology, specifically to a positioning and conveying system and method for layered distribution of paper-faced gypsum board. Background Technology

[0002] During the production process of gypsum board production line, after the gypsum board is laid and formed, it is usually conveyed one board at a time during the conveying process. In order to improve the drying efficiency, the dryer is set to multiple layers to dry multiple gypsum boards at the same time. The gypsum boards are usually redistributed by the distribution bridge, and they are usually divided into two groups of two boards in parallel to enter the drying chamber of the dryer for drying.

[0003] Since the dryer has multiple layers, the height of the distribution bridge output end needs to be constantly adjusted to connect with drying chambers of different heights. The height difference between the distribution bridge and the inlet of the drying layer can easily cause the wet gypsum board to deform and scratch, thus affecting the quality of the board. Therefore, it is very important for the distribution bridge to accurately switch to the next target drying layer.

[0004] Furthermore, in the existing technology, each time the distribution bridge switches to a new target layer, it requires a certain amount of time before the gypsum board can be transferred to the drying layer inlet. This waiting time is required for each layer of board delivery, resulting in wasted time and affecting the production line efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning and conveying system and method for layered distribution of gypsum board, so as to solve the technical problems in the prior art where inaccurate docking of the distribution bridge affects the quality of the board and waiting for feeding after layering affects the board feeding efficiency.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0007] A positioning and conveying system for layered distribution of paper-faced gypsum board includes:

[0008] A speed sensor, mounted on the distribution bridge, is used to detect the conveying speed of the distribution bridge;

[0009] A variable frequency motor is installed on the distribution bridge for driving the distribution bridge to operate at variable speeds;

[0010] An elevator, installed on the distribution bridge, is used to drive the distribution bridge to move up and down.

[0011] An encoder is installed on the motor output shaft of the elevator and rotates with the motor output shaft. The encoder outputs a pulse signal for each revolution of the encoder.

[0012] The control device includes the speed sensor, the variable frequency motor, the elevator, and the encoder, all of which are electrically connected to the control device. The control device stores the encoder pulse signal values ​​corresponding to the height of each drying layer of the dryer.

[0013] The control device receives and statistically analyzes the pulse signal values ​​of the encoder and determines the lifting direction and lifting distance of the elevator based on the comparison result between the pulse signal values ​​of the encoder and the pulse values ​​corresponding to the preset layer height. Based on the lifting distance and the speed detection value of the speed sensor, the control device adjusts the variable frequency motor to change the conveying speed of the distribution bridge so that when the discharge end of the distribution bridge is connected to the corresponding drying layer height, the distribution bridge directly delivers the plate to the inlet of the corresponding drying layer.

[0014] In a preferred embodiment of the present invention, the control device includes a data processing module and a control module. The data processing module is electrically connected to the encoder. The data processing module receives and accumulates the number of pulse signals from the encoder. When the elevator moves upward, the data processing module accumulates the number of real-time pulses received. When the elevator moves downward, the data processing module subtracts the number of real-time pulses received.

[0015] The data processing module temporarily stores the number of pulse signals output by the encoder corresponding to the target height of the drying layer of the dryer when the elevator drives the distribution bridge to reach the target height. The data processing module compares the preset number of pulse signals with the calculated number of pulses. The control module adjusts the lifting and lowering of the distribution bridge and the transmission speed of the distribution bridge according to the comparison result of the data processing module.

[0016] In a preferred embodiment of the present invention, when the real-time pulse count of the encoder obtained by the data processing module is less than the preset pulse signal count, the control module regulates the elevator to drive the distribution bridge to move upward and shift to connect with the target drying layer at a higher position. When the real-time pulse count of the encoder is greater than the preset pulse signal count, the control module regulates the elevator to drive the distribution bridge to move downward and shift to connect with the target drying layer at a lower position. When the pulse signal count obtained by the data processing module is equal to the preset pulse signal count, the elevator is stopped so that the distribution bridge connects with the inlet of the target drying layer to deliver the plate.

[0017] As a preferred embodiment of the present invention, a laser ranging sensor is installed below the discharge end of the distribution bridge. The laser ranging sensor is used to detect the height of the discharge end of the distribution bridge. An electrically controlled blocking block is provided on the discharge end of the distribution bridge. The electrically controlled blocking block is electrically connected to the control module and is used to block gypsum board.

[0018] The control device also includes an alarm module. The laser rangefinder is electrically connected to the data processing module. The data processing module compares the floor height corresponding to the laser rangefinder's detection height with the counted encoder pulse signals. The control module determines whether the encoder or the elevator is malfunctioning based on the comparison result. When the detection height of the laser rangefinder is equal to the floor height corresponding to the encoder pulse signals, the electrically controlled barrier block does not work. When the detection height of the laser rangefinder is not equal to the floor height corresponding to the encoder pulse signals, the control module determines that the encoder or the elevator is malfunctioning. The control module then controls the barrier block to work to block the plasterboard and simultaneously activates the alarm module.

[0019] As a preferred embodiment of the present invention, a photoelectric detection switch electrically connected to the control module is installed on the top of the distribution bridge. The photoelectric detection switch is used to detect gypsum board. The control device also includes a timing module, the timing time of which is used to count the empty board time of the distribution bridge.

[0020] When the photoelectric detection switch detects an empty board on the distribution bridge, the photoelectric detection switch sends an empty board signal to the control module. The control module receives the empty board signal and starts the timing module to count the empty board time. When the empty board time reaches the time limit, the control module regulates the elevator to start working so that the distribution bridge returns to zero and returns to the horizontal state.

[0021] In a preferred embodiment of the present invention, the time it takes for the distribution bridge to transport the gypsum board to the discharge end of the distribution bridge is equal to the time it takes for the elevator to move the discharge end of the distribution bridge to the target floor height, and the board feeding speed of the distribution bridge is not less than the conveying speed when the empty board is waiting.

[0022] This invention provides a conveying method for a positioning and conveying system for layered distribution of paper-faced gypsum board, comprising the following steps:

[0023] Step 100: Monitor the feeding speed and feeding height of the distribution bridge in real time;

[0024] Step 200: The control device adjusts the connection of the distribution bridge to the target drying layer based on the comparison result between the detected height and the target height, and simultaneously adjusts the variable frequency motor to adjust the conveying speed of the distribution bridge;

[0025] Step 300: When the set empty plate timer is reached, the control device adjusts the operation of the elevator to reset the distribution bridge to zero;

[0026] Step 400: Repeat the above steps 100 to 300 to perform positioning and layering of the board.

[0027] As a preferred embodiment of the present invention, the distribution bridge segmented conveying of gypsum board includes an accelerating tracking roller group and an accelerating conveying roller group, as well as a smooth transition roller group disposed between the accelerating tracking roller group and the accelerating conveying roller group. The accelerating tracking roller group, the smooth transition roller group and the accelerating conveying roller group are connected end to end in sequence. The accelerating tracking roller group is used to accelerate the adjustment of the gypsum board spacing. The photoelectric detection switch is installed at the tail of the smooth transition roller group, and the detection end of the photoelectric detection switch faces the conveying surface of the roller group.

[0028] In a preferred embodiment of the present invention, a fault buffer line is provided on the accelerating conveying roller group, and the photoelectric detection switch outputs a conveying signal when it detects the head of the gypsum board. The time taken by the accelerating conveying roller group to transport the gypsum board from the location of the photoelectric detection switch to the fault buffer line is equal to the time taken by the elevator to transfer the distribution bridge to the target board.

[0029] In a preferred embodiment of the present invention, in step 300, when the photoelectric detection switch detects a gypsum board before the empty board timing time is reached, the control device receives the board delivery signal and controls the timing module to return to zero and reset, and the control device regulates the distribution bridge to continue delivering boards.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] This invention uses encoders and speed sensors to detect the height of the distribution bridge and the board feeding speed in real time. A control device adjusts the moving speed of the elevator and the distribution bridge within the same time frame. This linkage locks the gypsum board layer changing and conveying, allowing both to be completed simultaneously. As the distribution bridge switches to the target layer height, the gypsum board is also conveyed to the discharge end of the distribution bridge. When the distribution bridge connects to the target drying layer inlet, the board is directly fed into the dryer without waiting, saving time and improving production efficiency. Attached Figure Description

[0032] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the control of a conveying system provided in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of fault detection and control provided in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the distribution bridge empty board reset control provided in an embodiment of the present invention;

[0036] Figure 4 A schematic flowchart of the conveying method provided in an embodiment of the present invention;

[0037] The labels in the diagram represent the following:

[0038] 1-Speed ​​sensor; 2-Variable frequency motor; 3-Elevator; 4-Encoder; 5-Control device; 6-Laser rangefinder sensor; 7-Electrically controlled barrier block; 8-Photoelectric detection switch; 9-Distribution bridge;

[0039] 51-Data processing module; 52-Control module; 53-Alarm module; 54-Timing module. Detailed Implementation

[0040] 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] This invention relates to the field of gypsum board production line technology, mainly focusing on the feeding and conveying process of gypsum board dryers. In the prior art, in order to improve efficiency, dryers are usually set up with many layers. The gypsum boards are distributed and grouped by a distribution bridge and then fed into the dryer. The distribution bridge can only feed one drying layer at a time, and it is necessary to change layers continuously. The height difference between the distribution bridge and the entrance of the drying layer can easily cause deformation and scratches of the wet gypsum board, thereby affecting the quality of the board. Therefore, it is very important for the distribution bridge to accurately switch to the next target drying layer.

[0042] In existing technologies, after the gypsum board is replaced by a layer, a certain amount of time needs to be waited before it is transferred to the drying layer inlet. This waiting time is wasteful and affects production efficiency. However, this invention locks the gypsum board replacement and gypsum board conveying together, completing the replacement and board conveying simultaneously. As the distribution bridge is positioned and switched to the target layer height, the gypsum board is also conveyed to the discharge end of the distribution bridge. When the distribution bridge connects to the target drying layer inlet, the board is directly fed into the dryer without waiting, saving time and improving production efficiency.

[0043] like Figure 1As shown, the present invention provides a positioning and conveying system for layered distribution of gypsum board, including a control device, a speed sensor 1 installed on the distribution bridge for detecting the conveying speed of the distribution bridge 9, a variable frequency motor 2 installed on the distribution bridge 9 for variable speed drive of the distribution bridge 9, a lift 3 installed on the distribution bridge 9 for driving the distribution bridge 9 to move up and down, and an encoder 4 installed on the motor output shaft of the lift 3 and rotating with the motor output shaft, wherein the encoder 4 outputs a pulse signal for each revolution of the encoder 4; the speed sensor 1, the variable frequency motor 2, the lift 3 and the encoder 4 are all electrically connected to the control device 5, and the control device 5 pre-stores the encoder 4 pulse signal values ​​corresponding to the height value of each drying layer of the dryer.

[0044] The implementation method of the control device 5 for regulating the conveying speed of the distribution bridge and positioning the layer change is summarized as follows: The control device 5 receives the pulse signal value of the statistical encoder 4 and determines the lifting direction and lifting distance of the elevator 3 based on the comparison result of the pulse signal value of the encoder 4 with the preset layer height corresponding to the pulse value. Based on the lifting distance and the speed detection value of the speed sensor 1, the control device 5 regulates the variable frequency motor 2 to change the conveying speed of the distribution bridge 9 so that when the discharge end of the distribution bridge 9 is connected to the corresponding drying layer height, the distribution bridge 9 directly sends the plate to the inlet of the corresponding drying layer.

[0045] The control device 5 includes a data processing module 51 and a control module 52. The data processing module 51 is electrically connected to the encoder 4. The data processing module 51 receives and accumulates the number of pulse signals from the encoder 4. When the elevator 3 moves upward, the data processing module 51 accumulates the number of real-time pulses received. When the elevator 3 moves downward, the data processing module 51 subtracts the number of real-time pulses received.

[0046] The data processing module 51 temporarily stores the number of pulse signals output by the encoder 4 corresponding to the target height of the drying layer of the dryer, which is driven by the lifting platform 3 and the distribution bridge 9. The data processing module 51 compares the preset number of pulse signals with the calculated number of pulses. The control module 52 adjusts the lifting and lowering of the distribution bridge 9 and the transmission speed of the distribution bridge 9 according to the comparison result of the data processing module 51.

[0047] In detail, when the real-time pulse count of encoder 4 obtained by data processing module 51 is less than the preset pulse signal count, control module 52 adjusts elevator 3 to drive distribution bridge 9 to move upward and shift to connect with the target drying layer at the higher position. When the real-time pulse count of encoder 4 is greater than the preset pulse signal count, control module 52 adjusts elevator 3 to drive distribution bridge 9 to move downward and shift to connect with the target drying layer at the lower position. When the pulse signal count obtained by data processing module 51 is equal to the preset pulse signal count, elevator 3 is adjusted to stop so that distribution bridge 9 connects with the entrance of the target drying layer to deliver the plate.

[0048] In this embodiment, the method of counting the number of encoder pulses is related to the moving direction of the elevator. It can be understood that when the elevator 3 moves upward, the output shaft of the elevator 3's motor rotates forward, and the encoder 4 rotates synchronously forward with the motor output shaft. The data processing module 51 then accumulates and counts the pulse signals generated during the upward movement of the encoder 4 based on its stored encoder pulse count. Therefore, the counted pulse signal value of the encoder 4 gradually increases. Conversely, when the elevator 3 moves downward, the output shaft of the elevator 3's motor rotates in reverse, and the encoder 4 rotates synchronously in reverse with the motor output shaft. The data processing module 51 then subtracts the counted pulse signals generated during the downward movement of the encoder 4 based on its stored encoder pulse count. Therefore, the pulse signal value of the encoder 4 gradually decreases. To better explain the positioning implementation method, this invention provides a detailed implementation example as follows:

[0049] Assuming the dryer (oven) is set to 12 layers, the distribution bridge 9 feeds the plasterboard to each layer, and the position values ​​of each layer (the number of encoder pulses corresponding to the target layer height) are specified as follows from the first layer: 0, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, 11000. The lifting sequence of the distribution bridge 9 is: 1-3-5-7-9-11-12-10-8-6-4-2-1. The distribution bridge 9 feeds the plasterboard into the dryer (oven) in a cyclical manner according to this lifting sequence.

[0050] First, the control device 5 initializes the entire conveying system. The initialization includes starting each section of the distribution bridge's conveying roller group, resetting the distribution bridge 9 to zero, and waiting for layer switching. The distribution bridge waiting for layer switching is automatically positioned to the first layer. The entire control is divided into two modes: automatic layer switching and manual layer switching. This embodiment details the automatic layer switching. Manual layer switching is the manual control of the distribution bridge to switch layers. Since manual layer switching is not the core content of this embodiment, and those skilled in the art can easily understand the advantages of the manual layer switching implementation based on the automatic control layer switching mode, including whether there is board detection and whether the photoelectric detection switch 8 detects the board and sends a board release signal, it will not be described in detail here.

[0051] When the distribution bridge 9 needs to change layers, the data processing module 51 compares the pulse count of the encoder 4 with the corresponding encoded pulse count of the target layer. If the counted pulse count is less than the layer position value of the target layer, the control module 52 controls the elevator 3 to adjust the distribution bridge 9 for upward positioning; otherwise, it performs downward positioning.

[0052] If the distribution bridge 9 is in the process of rising and positioning, the data processing module 51 determines in real time whether the encoder pulse count is greater than or equal to the target layer position value. If the encoder pulse count is greater than or equal to the target layer position value, the control module 52 controls the elevator 3 to stop the distribution bridge 9 from rotating and stop at the corresponding layer, thus completing one rising, positioning and layer-changing docking of the distribution bridge 9.

[0053] If the distribution bridge 9 is in the process of descent and positioning, when the data processing module 51 determines in real time that the number of statistical pulses is less than or equal to the layer position value of the target layer, the distribution bridge 9 stops rotating and stops at the corresponding layer, completing one descent and positioning of the distribution bridge 9 to change the layer and dock.

[0054] After completing the feeding of 12 drying layers using the above-mentioned rising and falling positioning methods, the distribution bridge 9 is reset to the first layer, and the plates are fed to the dryer again according to the set lifting sequence, and so on.

[0055] The automatic control process for resetting the empty board of distribution bridge 9 is as follows: Figure 3 As shown, specifically, a photoelectric detection switch 8 electrically connected to the control module 52 is installed on the top of the distribution bridge 9. The photoelectric detection switch 8 is used to detect gypsum board. The control device 5 also includes a timing module 54. The timing time of the timing module 54 is to count the empty board time of the distribution bridge 9. When the photoelectric detection switch 8 detects an empty board on the distribution bridge 9, the photoelectric detection switch 8 sends an empty board signal to the control module 52. The control module 52 receives the empty board signal and starts the timing module 54 to count the empty board time. When the empty board time reaches the timing time, the control module 52 regulates the elevator 3 to start working so that the distribution bridge 9 returns to zero and resets, returning to the horizontal state and connecting to the first floor.

[0056] The photoelectric detection switch 8 detects whether there is a board on the distribution bridge 9. If no board is fed for a long time (timed period), it indicates that the distribution bridge is empty, and one board feeding cycle is completed. It needs to be reset to zero and wait for the next board feeding cycle.

[0057] In the cyclic lifting positioning and layer changing process, the encoder and the lifting machine play a crucial role. Faults in the encoder and the lifting machine may not be detected in time, leading to inaccurate positioning. In order to detect problems with the encoder or the lifting machine in a timely manner, this invention also installs a laser range sensor 6 on the distribution bridge to compare and detect whether the encoder or the lifting machine is faulty in real time.

[0058] Specifically, a laser rangefinder 6 is installed below the discharge end of the distribution bridge 9. The laser rangefinder 6 is used to detect the height of the discharge end of the distribution bridge 9. An electrically controlled baffle block 7 is installed on the discharge end of the distribution bridge 9. The electrically controlled baffle block 7 is electrically connected to the control module 52 and is used to block the gypsum board.

[0059] Control device 5 also includes alarm module 53. Laser rangefinder 6 is electrically connected to data processing module 51. Data processing module 51 compares the floor height corresponding to the number of pulse signals from laser rangefinder 6 and encoder 4. Control module 52 determines whether encoder 4 or elevator 3 is faulty based on the comparison result. When the detection height of laser rangefinder 6 is equal to the floor height corresponding to the number of pulse signals from encoder 4, the electrically controlled barrier block 7 does not work. When the detection height of laser rangefinder 6 is not equal to the floor height corresponding to the number of pulse signals from encoder 4, control module 52 determines that encoder 4 or elevator 3 is faulty. Control module 52 controls the barrier block to work to block the plasterboard and simultaneously activates alarm module 53. Fault detection control is as follows: Figure 2 As shown in the image.

[0060] The electric control barrier block 7 retracts or releases like a spring-loaded retractable blade. However, in this embodiment, the driving force of the barrier block comes from a micro motor and telescopic rod integrated in the electric control barrier block 7. The micro motor is electrically connected to the control module 52. The control module 52 adjusts the electric control barrier block 7 according to the detection result of the photoelectric detection switch 8 to either release the barrier block to limit the plasterboard and prevent passage, or retract the barrier block to release and deliver the plasterboard (i.e., the electric control barrier block does not work).

[0061] The lifting height is determined by the difference between the number of pulse signals from the statistical encoder and the number of pulse signals corresponding to the target drying layer height, denoted as H. The distance between the photoelectric detection switch and the end of the distribution bridge 9 is X. The time it takes for the distribution bridge 9 to transport the gypsum board to its discharge end is equal to the time it takes for the elevator 3 to move the discharge end of the distribution bridge 9 to the target layer height. Furthermore, the board feeding speed of the distribution bridge 9 is not less than the conveying speed when the board is waiting for empty boards. In other words, while the lifting and positioning movement is occurring, the distribution bridge adjusts its speed to transport the gypsum board. The formula is: X / distribution bridge feeding speed = H / distribution bridge lifting and positioning movement speed = board feeding time = height adjustment time. The speed of the distribution bridge 9 is greater than its initial waiting speed to ensure efficient simultaneous height and speed adjustment, thereby increasing the board feeding rate. The adjustable conveying speed and height adjustment speed of the distribution bridge can be determined by the control device 5 through linear analysis based on the aforementioned proportional relationships, yielding a more optimal solution.

[0062] In addition to the above-described positioning and conveying system for layered distribution of gypsum board, this invention further provides a conveying method for the positioning and conveying system for layered distribution of gypsum board, such as... Figure 4 The steps shown are as follows:

[0063] Step 100: Monitor the feeding speed and feeding height of the distribution bridge 9 in real time;

[0064] Step 200: The control device 5 adjusts the distribution bridge 9 to connect with the target drying layer based on the comparison result between the detection height and the target height, and at the same time adjusts the variable frequency motor to adjust the conveying speed of the distribution bridge 9;

[0065] Step 300: When the set empty plate timer is reached, the control device 5 adjusts the operation of the elevator to reset the distribution bridge 9 to zero.

[0066] Step 400: Repeat the above steps 100 to 300 to perform positioning and layering of the board.

[0067] In step 300, the photoelectric detection switch 8 detects the plasterboard before the empty board timing time is reached. The control device 5 receives the board delivery signal and adjusts the timing module 54 to return to zero and reset. The control device 5 then adjusts the distribution bridge to continue delivering the board.

[0068] The distribution bridge 9 transports gypsum boards in sections, including an accelerating tracking roller group and an accelerating delivery roller group, as well as a smooth transition roller group located between the accelerating tracking roller group and the accelerating delivery roller group. The accelerating tracking roller group, the smooth transition roller group, and the accelerating delivery roller group are connected sequentially end to end. The accelerating tracking roller group is used to accelerate the adjustment of the gypsum board spacing. A photoelectric detection switch 8 is installed at the tail of the smooth transition roller group, and the detection end of the photoelectric detection switch 8 faces the conveying surface of the roller group. The above three conveying roller groups are controlled and driven by three variable frequency motors, while the variable frequency motor 2 is installed on the accelerating delivery roller group.

[0069] In step 200, when the distribution bridge 9 moves to the target height, if the number of pulse signals from the encoder 4, the floor position value, and the value from the laser rangefinder 6 are not the same, the control device 5 determines that either the encoder 4 or the elevator 3 is faulty.

[0070] Considering that the gypsum board has a certain conveying speed when it reaches the discharge end of the distribution bridge (the tail end of the conveying of the accelerating feed roller group), if a fault is detected and the machine suddenly stops, the gypsum board may directly rush into the dryer or hit the electrically controlled baffle block 7 at a high speed, which is an undesirable situation.

[0071] Therefore, in this embodiment, a fault buffer line is provided on the accelerating feed roller group, and when the photoelectric detection switch 8 detects the head of the gypsum board, it outputs a feeding signal. The time taken for the accelerating feed roller group to transport the gypsum board from the position of the photoelectric detection switch 8 to the fault buffer line is equal to the time taken for the elevator 3 to change the layer of the distribution bridge 9 to the target board. This is equivalent to using the fault buffer line as the feeding end of the distribution bridge to calculate the speed.

[0072] The fault buffer line is still a distance away from the end of the actual distribution bridge, and this distance is no more than one-third of the length of the gypsum board. The buffer distance here corresponds to the buffer delay time. After the fault alarm stops, the electric control block 7 opens before the gypsum board reaches the end to prevent the gypsum board from hitting the baffle at too high a speed and causing damage to the board.

[0073] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A positioning and conveying system for layered distribution of paper-faced gypsum board, characterized in that, include: A speed sensor (1) is installed on the distribution bridge (9) to detect the conveying speed of the distribution bridge (9); A variable frequency motor (2) is installed on the distribution bridge (9) for variable speed drive of the distribution bridge (9); An elevator (3) is installed on the distribution bridge (9) to drive the distribution bridge (9) to move up and down; The encoder (4) is installed on the motor output shaft of the elevator (3) and rotates with the motor output shaft. The encoder (4) outputs a pulse signal for each revolution. The speed sensor (1), the variable frequency motor (2), the elevator (3) and the encoder (4) are all electrically connected to the control device (5). The control device (5) stores the pulse signal values ​​of the encoder (4) corresponding to the height value of each drying layer of the dryer. The control device (5) receives and statistically analyzes the pulse signal values ​​of the encoder (4) and determines the lifting direction and lifting distance of the elevator (3) based on the comparison result between the pulse signal value of the encoder (4) and the pulse value corresponding to the preset layer height. Based on the lifting distance and the speed detection value of the speed sensor (1), the variable frequency motor (2) is adjusted to change the conveying speed of the distribution bridge (9) so that when the discharge end of the distribution bridge (9) is connected to the corresponding drying layer height, the distribution bridge (9) directly sends the plate to the corresponding drying layer inlet. The time it takes for the distribution bridge (9) to transport the gypsum board to the discharge end of the distribution bridge (9) is equal to the time it takes for the elevator (3) to move the discharge end of the distribution bridge (9) to the target floor height, and the board feeding speed of the distribution bridge (9) is not less than the conveying speed when the empty board is waiting.

2. The positioning and conveying system for layered distribution of paper-faced gypsum board according to claim 1, characterized in that, The control device (5) includes a data processing module (51) and a control module (52). The data processing module (51) is electrically connected to the encoder (4). The data processing module (51) receives and accumulates the number of pulse signals from the encoder (4). When the elevator (3) moves upward, the data processing module (51) accumulates the number of real-time pulses received. When the elevator (3) moves downward, the data processing module (51) subtracts the number of real-time pulses received. The data processing module (51) temporarily stores the number of pulse signals output by the encoder (4) corresponding to the drying layer height of the dryer, which is driven by the elevator (3) to drive the distribution bridge (9) to reach the target layer height. The data processing module (51) compares the preset number of pulse signals with the calculated number of pulses. The control module (52) adjusts the lifting and lowering of the distribution bridge (9) and the transmission speed of the distribution bridge (9) according to the comparison result of the data processing module (51).

3. The positioning and conveying system for layered distribution of paper-faced gypsum board according to claim 2, characterized in that, When the real-time pulse count of the encoder (4) obtained by the data processing module (51) is less than the preset pulse signal count, the control module (52) regulates the elevator (3) to drive the distribution bridge (9) to move upward and shift to connect with the target drying layer at the higher position. When the real-time pulse count of the encoder (4) is greater than the preset pulse signal count, the control module (52) regulates the elevator (3) to drive the distribution bridge (9) to move downward and shift to connect with the target drying layer at the lower position. When the pulse signal count obtained by the data processing module (51) is equal to the preset pulse signal count, the elevator (3) is regulated to stop so that the distribution bridge (9) connects with the entrance of the target drying layer to deliver the plate.

4. The positioning and conveying system for layered distribution of paper-faced gypsum board according to claim 3, characterized in that, A laser ranging sensor (6) is installed below the discharge end of the distribution bridge (9). The laser ranging sensor (6) is used to detect the height of the discharge end of the distribution bridge (9). An electrically controlled barrier block (7) is provided on the discharge end of the distribution bridge (9). The electrically controlled barrier block (7) is electrically connected to the control module (52). The electrically controlled barrier block (7) is used to block gypsum board. The control device (5) further includes an alarm module (53). The laser rangefinder (6) is electrically connected to the data processing module (51). The data processing module (51) compares the laser rangefinder (6) with the counted number of pulse signals of the encoder (4) corresponding to the floor height. The control module (52) determines whether the encoder (4) or the elevator (3) is faulty based on the comparison result. When the detection height of the laser rangefinder (6) is equal to the floor height corresponding to the number of pulse signals of the encoder (4), the electrically controlled barrier block does not work. When the detection height of the laser rangefinder (6) is not equal to the floor height corresponding to the number of pulse signals of the encoder (4), the control module (52) determines that the encoder (4) or the elevator (3) is faulty. The control module (52) controls the electrically controlled barrier block (7) to work to block the plasterboard and simultaneously activates the alarm module (53) to sound an alarm.

5. A positioning and conveying system for layered distribution of paper-faced gypsum board according to claim 3, characterized in that, A photoelectric detection switch (8) electrically connected to the control module (52) is installed on the top of the distribution bridge (9). The photoelectric detection switch (8) is used to detect gypsum board. The control device (5) also includes a timing module (54). The timing time of the timing module (54) is to count the empty board time of the distribution bridge (9). When the photoelectric detection switch (8) detects an empty board on the distribution bridge (9), the photoelectric detection switch (8) sends an empty board signal to the control module (52). The control module (52) receives the empty board signal and starts the timing module (54) to time the empty board time. When the empty board time reaches the timing time, the control module (52) regulates the elevator (3) to start working so that the distribution bridge (9) returns to zero and resets to the horizontal state.

6. A positioning and conveying method for layered distribution of gypsum board, used in the positioning and conveying system for layered distribution of gypsum board as described in any one of claims 1-5, characterized in that, Includes the following steps: Step 100: Monitor the feeding speed and feeding height of the distribution bridge (9) in real time; Step 200: The control device (5) adjusts the distribution bridge (9) to connect to the target drying layer according to the comparison result between the detection height and the target height, and at the same time adjusts the variable frequency motor to adjust the conveying speed of the distribution bridge (9); Step 300: When the set empty plate time is reached, the control device (5) adjusts the operation of the elevator so that the distribution bridge (9) is reset to zero; Step 400: Repeat the above steps 100-300 to perform positioning, layering, and board delivery.

7. The positioning and conveying method for layered distribution of paper-faced gypsum board according to claim 6, characterized in that, The distribution bridge (9) transports gypsum board in sections, including an accelerating tracking roller group and an accelerating conveying roller group, as well as a smooth transition roller group set between the accelerating tracking roller group and the accelerating conveying roller group. The accelerating tracking roller group, the smooth transition roller group and the accelerating conveying roller group are connected end to end in sequence. The accelerating tracking roller group is used to accelerate the adjustment of the gypsum board spacing. A photoelectric detection switch (8) is installed on the top of the distribution bridge (9). The photoelectric detection switch (8) is installed at the tail of the smooth transition roller group, and the detection end of the photoelectric detection switch (8) faces the conveying surface of the roller group.

8. The positioning and conveying method for layered distribution of paper-faced gypsum board according to claim 7, characterized in that, A fault buffer line is provided on the accelerating conveying roller group, and the photoelectric detection switch (8) outputs a conveying signal when it detects the head of the gypsum board. The time taken for the accelerating conveying roller group to convey the gypsum board from the location of the photoelectric detection switch (8) to the fault buffer line is equal to the time taken for the elevator (3) to move the discharge end of the distribution bridge (9) to the target layer height.

9. A positioning and conveying method for layered distribution of paper-faced gypsum board according to claim 8, characterized in that, In step 300, the photoelectric detection switch (8) detects the gypsum board before the empty board timing time is reached. The control device (5) receives the board delivery signal and controls the timing module (54) configured within it to return to zero and reset. The control device (5) regulates the distribution bridge to continue delivering the board.

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