Paper machine felt cloth deviation correction device and deviation correction method

Abstract

The present invention relates to the field of papermaking equipment, and specifically provides a paper machine mesh cloth correction device and correction method, comprising: a bracket; a swing arm rotatably connected to the bracket, the swing arm is in a vertical state in a free state; an angular displacement sensor fixedly connected to the bracket, the detection shaft of the angular displacement sensor is fixedly connected to the swing arm to detect the deflection angle of the swing arm; a correction part fixedly connected to the bracket, used for driving the swing arm to rotate to correct the deflection of the mesh cloth; the paper machine mesh cloth correction device disclosed in the embodiment of the present invention obtains the angle of the swing arm through the angular displacement sensor to obtain the degree of deviation of the mesh cloth, and the deviation state can be obtained at the moment when the mesh cloth deviates, thereby improving the timeliness and detection accuracy of the correction device, and at the same time, the mesh cloth is corrected by the swing arm when it deviates, thereby improving the timeliness of the correction device.

Description

Technical Field

[0001] The invention relates to the field of papermaking equipment, and in particular to a deviation correction device and a deviation correction method for a paper machine blanket felt. Background Art

[0002] With the continuous development of the papermaking industry, the running speed of paper machines is increasing, and the stable operation of the blanket cloth that carries the paper becomes very important. However, in the papermaking process, the blanket cloth may deviate from the predetermined route and run off the track. In order to ensure that the blanket cloth can run correctly on the predetermined route, the prior art adds a deviation correction device on both sides of the blanket cloth.

[0003] The deviation correction devices that are currently widely used use deviation sensors in combination with pneumatic actuators. It is understandable that when deviation occurs, the swing arm of the deviation sensor will send two signals to the PLC controller according to the deviation distance: deviation and no longer possible deviation. The corresponding PLC controller will make two responses: the pneumatic actuator will be activated and the whole machine will be stopped.

[0004] The deviation correction device in the prior art uses a switch signal. Only when the felt fabric deviates to a preset position, the deviation sensor will generate a deviation signal to the PLC controller. At this time, the PLC controller will control the pneumatic actuator to correct the deviation. However, when the felt fabric deviates and does not reach the preset position, the deviation sensor will not send a signal, which causes the problem of low detection accuracy of the deviation sensor and the problem of delayed correction of the pneumatic actuator. Based on the above problems, the present application proposes a paper machine felt fabric deviation correction device and a deviation correction method. Summary of the invention

[0005] The object of the present invention is to provide a paper machine felt cloth deviation correction device and a deviation correction method to solve the problem of deviation correction lag in the current deviation correction device.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A paper machine felt cloth deviation correction device, comprising:

[0008] Bracket;

[0009] Rotating a swing arm connected to the bracket, wherein the swing arm is in a vertical state in a free state;

[0010] An angular displacement sensor fixedly connected to the bracket, wherein a detection axis of the angular displacement sensor is fixedly connected to the swing arm to detect the deflection angle of the swing arm;

[0011] The deviation correcting part fixedly connected to the bracket is used for driving the swing arm to rotate so as to correct the deviation of the blanket felt.

[0012] Furthermore, the swing arm is a flat plate.

[0013] Furthermore, the deviation correcting part is a rotary cylinder.

[0014] Furthermore, the correction device also includes:

[0015] a cylinder control valve, the cylinder control valve being in communication with the rotary cylinder to control the pressure of the rotary cylinder;

[0016] A PLC controller electrically connected to the cylinder control valve, wherein the PLC controller is electrically connected to the angular displacement sensor to control the cylinder control valve according to the detection result of the angular displacement sensor.

[0017] A paper machine felt correction method comprises the following steps:

[0018] Acquiring detection signals of the angular displacement sensors on both sides of the blanket felt;

[0019] It is determined whether the blanket felt is deviated based on the detection signal of the angular displacement sensor, and when it is detected that the blanket felt is deviated, the swing arm is controlled by the execution unit to correct the deviation of the blanket felt.

[0020] Furthermore, the specific steps of controlling the swing arm to correct the deviation of the felt fabric by the execution unit include:

[0021] The swing arm located at the first side is controlled by the execution unit to rotate in the opposite direction to the initial state to correct the deviation of the blanket felt;

[0022] The swing arm at the second side is controlled by the execution unit to rotate to a position in contact with the blanket felt, wherein the first side is the side where the blanket felt runs in a deviation direction, and the second side is the side opposite to the deviation direction;

[0023] The detection signal of the angular displacement sensor on the second side is obtained until the swing arm on the second side is restored to the initial state, and the control of the execution part is stopped so that the swing arms on both sides of the blanket felt cloth are in the initial state.

[0024] Furthermore, the specific steps of controlling the swing arm located at the second side to rotate to a position that fits the blanket felt through the execution unit include:

[0025] Acquiring the detection result of the angular displacement sensor in real time;

[0026] The control parameters of the actuator are gradually increased, and the increase of the control parameters of the actuator is stopped when the angular displacement sensor detects that the swing arm stops rotating.

[0027] In summary, the present invention has the following beneficial effects compared with the prior art:

[0028] 1. The paper machine blanket felt correction device disclosed in the embodiment of the present invention obtains the angle of the swing arm through an angular displacement sensor to obtain the degree of deviation of the blanket felt, and the deviation state can be obtained at the moment when the blanket felt deviates, thereby improving the timeliness and detection accuracy of the correction device. At the same time, when the blanket felt deviates, the blanket felt is corrected by the swing arm, thereby improving the timeliness of the correction device.

[0029] 2. The paper machine mesh felt correction device method disclosed in the embodiment of the present invention detects the state of the mesh disk felt in real time when correcting the mesh felt by controlling the swing arm, thereby improving the accuracy of the correction action. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The present invention is a schematic structural diagram of a paper machine blanket felt correction device disclosed in the present invention.

[0031] Figure 2 It is a schematic diagram of the application of the paper machine blanket felt correction device disclosed in the present invention.

[0032] Figure 3 The invention discloses a control logic diagram of a paper machine mesh felt correction method.

[0033] Figure 4 The present invention is a flowchart of one embodiment of the method for correcting deviation of a paper machine clothing felt disclosed in the present invention.

[0034] Figure 5 The present invention is a flowchart of a subroutine of the method for correcting deviation of a paper machine blanket felt cloth disclosed in the present invention.

[0035] Figure numerals: 1. bracket; 11. support rod; 12. swing arm frame; 2. swing arm; 3. angular displacement sensor; 4. rotary cylinder; 5. host computer; 6. PLC controller; 7. network; 8. cylinder control valve; 9. mesh blanket cloth. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] Figure 1 and Figure 2 As shown, a paper machine wire cloth correction device provided by an embodiment of the present invention is used for correcting the wire cloth 9 of the wire cloth, and the correction device comprises:

[0039] Bracket 1;

[0040] Rotate the swing arm 2 connected to the bracket 1, wherein the swing arm 2 is in a vertical state in a free state;

[0041] An angular displacement sensor 3 fixedly connected to the bracket 1, wherein a detection axis of the angular displacement sensor 3 is fixedly connected to the swing arm 2 to detect the deflection angle of the swing arm 2;

[0042] A deviation-correcting part fixedly connected to the bracket 1, used for driving the swing arm 2 to rotate so as to correct the deviation of the blanket felt 9;

[0043] like Figure 2 As shown, in this embodiment, the deviation correction device of the present invention is arranged on both sides of the mesh carpet felt cloth 9. At this time, the swing arm 2 is in contact with the edge of the mesh carpet felt cloth 9. When the mesh carpet felt cloth 9 deviates, the mesh carpet felt cloth 9 drives the swing arm 2 on the deviated side to rotate. At this time, the angular displacement sensor 3 detects the rotation of the swing arm 2. The angular displacement sensor 3 sends a detection signal to the control device. After obtaining the detection signal sent by the angular displacement sensor 3, the control device starts by controlling the deviation correction parts on both sides of the mesh carpet felt cloth 9, wherein the deviation correction part on the deflected side of the mesh carpet felt cloth 9 drives the swing arm 2 on the deflected side of the mesh carpet felt cloth 9. The mesh carpet cloth 9 is moved to make the mesh carpet cloth 9 return to the correct position. The swing arm 2 on the opposite side of the deflection direction of the mesh carpet cloth 9 is driven by the deviation correction part to rotate onto the mesh carpet cloth 9. When the pressure of the deviation correction part is controlled at a preset pressure, the swing arm 2 on the opposite side of the deflection direction of the mesh carpet cloth 9 is just in contact with the mesh carpet cloth 9. Based on the detection angle of the angular displacement sensor 3 on the opposite side of the deflection direction of the mesh carpet cloth 9, the air supply pressure of the deviation correction part on the same side is controlled to make the swing arm 2 on the opposite side of the deflection direction of the mesh carpet cloth 9 move with the mesh carpet cloth 9, so that the degree of return of the mesh carpet cloth 9 can be measured.

[0044] In this embodiment, the bracket 1 includes a support rod 11 and a swing arm frame 12, the support rod 11 is L-shaped, the swing arm frame 12 is U-shaped, the support rod 11 and the swing arm frame 12 are fixedly connected by screws, and the bracket 1 is used to install the swing arm 2 on both sides of the mesh blanket felt cloth 9. In some examples, the angular displacement sensor 3 and the rotary cylinder 4 are fixedly connected to the bracket 1 by screws, and the angular displacement sensor 3 and the rotary cylinder 4 are respectively arranged on both sides of the swing arm 2;

[0045] As a preferred implementation in this embodiment, the swing arm 2 is a flat plate. Since the blanket felt 9 is relatively soft, when the swing arm 2 is a flat plate, the contact area between the swing arm 2 and the blanket felt 9 becomes larger, which can prevent the blanket felt 9 from being deformed.

[0046] As a preferred implementation in this embodiment, the deviation correcting part is a rotary cylinder 4, the rotary cylinder 4 is fixedly connected to the bracket 1, and the output shaft of the rotary cylinder 4 is fixedly connected to the swing arm 2 through a spline connection;

[0047] As a preferred implementation in this embodiment, the correction device further includes:

[0048] a cylinder control valve 8, wherein the cylinder control valve 8 is connected to the rotary cylinder 4 to control the pressure of the rotary cylinder 4;

[0049] A PLC controller 6 electrically connected to the cylinder control valve 8, wherein the PLC controller 6 is electrically connected to the angular displacement sensor 3 to control the cylinder control valve 8 according to the detection result of the angular displacement sensor 3;

[0050] In this embodiment, the cylinder control valve 8 is a three-position four-way solenoid valve and a pressure regulating valve, so that the cylinder control valve 8 can control the rotation direction of the rotary cylinder 4 and the gas pressure entering the rotary cylinder 4. The cylinder control valve 8 and the angular displacement sensor 3 are electrically connected to the PLC controller 6 through the network 7;

[0051] It should be noted that the deflection correcting unit may also be other structures. For example, the deflection correcting unit 4 is a motor, and the rotation angle of the 2 is controlled by controlling the voltage of the motor.

[0052] Example 2

[0053] The embodiment of the present invention also discloses a method for correcting deviation of a paper machine felt cloth, such as Figure 3 As shown, the control logic diagram of the method for correcting the deviation of the blanket felt cloth is shown; the control program of the method for correcting the deviation runs on the PLC controller 6, the PLC controller 6 is connected to the cylinder control valve 8 through the network 7 to control the rotating cylinder 4 through the cylinder control valve 8, and at the same time, the angular displacement sensor 3 sends the detection signal to the PLC controller 6 through the network 7, and the PLC controller 6 controls the cylinder control valve 8 according to the detection signal of the angular displacement sensor 3, so that the pressure entering the rotating cylinder 4 just controls the swing arm 2 to stick to the blanket felt cloth 9;

[0054] The network 7 may include various connection types, such as a wireless Wi Fi network, a GPRS network, a wired network, etc.;

[0055] In this embodiment, the network 7 is also connected to a host computer 5, which is used to monitor the detection signal of the angular displacement sensor 3, and to intuitively display the offset state of the blanket felt 9 on the host computer 5. At the same time, the host computer 5 is also connected to the PLC controller 6, and is used to set the control parameters of the PLC controller 6;

[0056] A paper machine felt cloth correction method, such as Figure 4 As shown, the following steps are included:

[0057] Step S100, acquiring detection signals of the angular displacement sensors 3 on both sides of the blanket felt;

[0058] Step S200, judging whether the blanket felt 9 is deviated based on the detection signal of the angular displacement sensor 3, and controlling the swing arm to correct the deviation of the blanket felt through the execution unit when the deviation of the blanket felt 9 is detected;

[0059] Specifically, in this embodiment, the displacement sensor 3 detects the angle of the swing arm 2, and transmits it to the host computer 5 and the PLC controller 6 through the network 7. The host computer 5 determines whether the blanket felt 9 is deviated through the detection signal. When it is determined that the blanket felt 9 is deviated, the PLC controller 6 performs a deviation correction action;

[0060] Preferably, Figure 5 As shown, the following steps are included:

[0061] Step S210, controlling the swing arm 2 located at the first side to rotate in the opposite direction to the initial state through the execution unit to correct the deviation of the blanket felt 9;

[0062] Step S220, controlling the swing arm 2 located at the second side to rotate to a position in contact with the blanket felt 9 through the execution unit, wherein the first side is the side where the blanket felt 9 is running in a deviation direction, and the second side is the side opposite to the deviation direction;

[0063] Step S230, obtaining the detection signal of the angular displacement sensor 3 on the second side until the swing arm 2 on the second side returns to the initial state, and stopping the control of the execution unit so that the swing arms on both sides of the blanket felt 9 are in the initial state;

[0064] Specifically, based on the detection signal of the angular displacement sensor 3, it is determined whether the mesh blanket cloth 9 is deviated. When it is detected that the mesh blanket cloth 9 is deviated, the swing arm 2 on the first side is controlled by the rotary cylinder 4 on the first side to rotate in the opposite direction to the initial state, and the swing arm 2 on the second side is controlled by the rotary cylinder 4 on the second side to rotate and fit the position of the mesh blanket cloth 9, wherein the first side is the side where the mesh blanket cloth 9 is deviated, and the second side is the side opposite to the deviated direction.

[0065] Acquire the detection signal of the angular displacement sensor 3 on the second side until the swing arm 2 on the second side returns to the initial state, and stop controlling the rotating cylinders 4 on both sides of the blanket felt 9 so that the swing arms 2 on both sides of the blanket felt 9 remain in the initial state;

[0066] In this embodiment, the air pressure required for the swing arm 2 to rotate to a preset angle is calculated through experiments. When the rotary cylinder 4 controls the swing arm 2 to rotate, if the swing arm 2 does not fit the carpet felt cloth 9, there is a corresponding relationship between the pressure controlling the rotary cylinder 4 and the detection result of the angular displacement sensor 3. When the swing arm 2 fits the carpet felt cloth 9, a greater pressure is required to change the angle of the swing arm 2. Therefore, by detecting the relationship between the control pressure of the rotary cylinder 4 and the angle of the swing arm 2 detected by the angular displacement sensor 3, the swing arm 2 can be made to fit exactly on the carpet felt cloth 9, and at the same time, the swing arm 2 does not apply pressure to the carpet felt cloth 9.

[0067] Exemplarily, when controlling the rotation of the swing arm 2, the air pressure of the rotating cylinder 4 is controlled to gradually increase. At this time, the swing arm 2 rotates slowly under the control of the rotating cylinder 4, and the angular displacement sensor 3 detects the rotation of the swing arm 2. When the angular displacement sensor 3 detects that the swing arm 2 does not rotate, the pressure increase of the rotating cylinder 4 is stopped. At this time, the swing arm 2 just fits the blanket felt 9.

[0068] During deviation correction, when the mesh felt 9 is in the process of restoring its initial state, the mesh felt 9 pushes the swing arm 2 on the second side to rotate. At this time, the air supply pressure of the rotary cylinder 4 on the second side is controlled to gradually decrease according to the detection result of the angular displacement sensor 3 on the second side, so that the swing arm 2 is always attached to the mesh felt 9, so that the swing arm 2 on the second side can detect the deviation degree of the mesh felt 9 in real time;

[0069] When the mesh blanket cloth 9 is corrected by the swing arm 2 on the first side, the rotary cylinder 4 on the first side is pressurized according to the detection result of the angular displacement sensor 3 on the first side, so that the rotary cylinder 4 pushes the mesh blanket cloth 9 through the swing arm 2. Since the mesh blanket cloth 9 is relatively soft, the mesh blanket cloth 9 will be deformed during the process of the swing arm 2 pushing the swing arm 2 to correct the deviation. Therefore, the angular displacement sensor 3 on the first side cannot accurately check the deviation state of the mesh blanket cloth 9. Therefore, the present invention sets a correction device on the second side.

[0070] In this embodiment, when the deviation correction device corrects the mesh felt cloth 9, the host computer 5 displays the detection result of the angular displacement sensor 3 in real time.

[0071] Example 3

[0072] The present invention also discloses a method storing a computer program, wherein when the computer program is executed by a processor, the processor executes the paper machine mesh felt cloth correction method described in Example 2.

[0073] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0074] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0075] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0076] Computer readable media include permanent and non-permanent, removable and non-removable media and can store information by any method or technology. The information can be computer readable instructions, data structures, program modules or other data.

[0077] Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include non-transitory-medium such as modulated data signals and carrier waves.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A paper machine felt correction device, characterized in that: include: Bracket; Rotating a swing arm connected to the bracket, wherein the swing arm is in a vertical state in a free state; An angular displacement sensor fixedly connected to the bracket, wherein a detection axis of the angular displacement sensor is fixedly connected to the swing arm to detect the deflection angle of the swing arm; A deviation-correcting part fixedly connected to the bracket is used to drive the swing arm to rotate to correct the deviation of the blanket felt; The swing arm is a flat plate; the deviation correcting part is a rotary cylinder; the rotary cylinder is fixedly connected to the bracket, and the output shaft of the rotary cylinder is fixedly connected to the swing arm through a spline connection; The correction device also includes: a cylinder control valve, the cylinder control valve being in communication with the rotary cylinder to control the pressure of the rotary cylinder; A PLC controller electrically connected to the cylinder control valve, wherein the PLC controller is electrically connected to the angular displacement sensor to control the cylinder control valve according to the detection result of the angular displacement sensor; The bracket includes a support rod and a swing arm frame, the support rod is L-shaped, the swing arm frame is U-shaped, the support rod and the swing arm frame are fixedly connected by screws, and the bracket is used to install the swing arm on both sides of the blanket felt cloth; The angular displacement sensor and the rotary cylinder are fixedly connected to the bracket by screws, and the angular displacement sensor and the rotary cylinder are respectively arranged on both sides of the swing arm; When the mesh blanket fabric deviates, the mesh blanket fabric drives the swing arm on the side of the deviated fabric to rotate. At this time, the angular displacement sensor detects the rotation of the swing arm, and the angular displacement sensor sends a detection signal to the control device. After obtaining the detection signal sent by the angular displacement sensor, the control device starts by controlling the deviation correction parts on both sides of the mesh blanket fabric, wherein the deviation correction part on the deflected side of the mesh blanket fabric drives the swing arm on the deflected side of the mesh blanket fabric to move the mesh blanket fabric so that the mesh blanket fabric returns to the correct position; the mesh blanket fabric The swing arm on the side opposite to the deflection direction rotates onto the mesh blanket cloth driven by the deviation correcting part. When the pressure of the deviation correcting part is controlled at a preset pressure, the swing arm on the side opposite to the deflection direction of the mesh blanket cloth is just in contact with the mesh blanket cloth. Based on the detection angle of the angular displacement sensor on the side opposite to the deflection direction of the mesh blanket cloth, the air supply pressure of the deviation correcting part on the same side is controlled so that the swing arm on the side opposite to the deflection direction of the mesh blanket cloth moves with the mesh blanket cloth, thereby measuring the degree of self-alignment of the mesh blanket cloth.

2. A method for correcting the deviation of a paper machine clothing felt, used in the paper machine clothing felt correcting device according to claim 1, characterized in that: The following steps are involved: Acquire detection signals of angular displacement sensors on both sides of the blanket felt; It is determined whether the blanket felt is deviated based on the detection signal of the angular displacement sensor, and when it is detected that the blanket felt is deviated, the swing arm is controlled by the execution unit to correct the deviation of the blanket felt.

3. The method for correcting deviation of a paper machine clothing felt according to claim 2, characterized in that: The specific steps of controlling the swing arm to correct the felt fabric through the actuator include: The swing arm located at the first side is controlled by the execution unit to rotate in the opposite direction to the initial state to correct the deviation of the blanket felt; The swing arm at the second side is controlled by the execution unit to rotate to a position in contact with the blanket felt, wherein the first side is the side where the blanket felt runs in a deviation direction, and the second side is the side opposite to the deviation direction; The detection signal of the angular displacement sensor on the second side is obtained until the swing arm on the second side is restored to the initial state, and the control of the execution part is stopped so that the swing arms on both sides of the blanket felt cloth are in the initial state.

4. The method for correcting deviation of a paper machine clothing felt according to claim 3, characterized in that: The specific steps of controlling the swing arm located at the second side to rotate to a position of fitting the blanket felt by the execution unit include: Acquiring the detection result of the angular displacement sensor in real time; The control parameter of the actuator is gradually increased, and the increase of the control parameter of the actuator is stopped when the angular displacement sensor detects that the swing arm stops rotating.

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