Filter cloth walking type filter press and filter cloth control method

Abstract

The invention belongs to the technical field of mechanical control, and discloses a filter cloth walking type filter press and a filter cloth control method.The filter cloth walking type filter press comprises the steps that a rotary encoder is adopted for feeding back displacement data of a filter cloth driving shaft in real time, the rotating speed of a motor is accurately controlled after PLC operation, a closed-loop adjusting system is formed, and it is ensured that the filter pressing process is stable and reliable; multiple filter cloth driving shafts are arranged in parallel and are matched with a chain linkage mechanism, and synchronous operation of multiple sections of filter cloth is realized under the synergistic effect of a supporting rod and a guide roller, so that the bearing stability of the system is enhanced, the single-shaft load is reduced through distributed driving, and the service life of equipment is prolonged; according to the filter cloth walking type filter press, a unique double-layer filter cloth unfolding-combining circulating mode is adopted, and an alternate guide path is formed by utilizing the first cloth roller and the third cloth roller, so that the filter cloth automatically finishes opening and closing actions in the lifting process, and efficient and accurate automatic operation of the filter cloth walking type filter press is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical control, and relates to a filter cloth walking type filter press and a filter cloth control method. Background Art

[0002] As a widely used traditional filtering device, the filter press has the characteristics of simple process, large filtration pressure difference, stable operation, etc., and is widely used in industries such as chemical industry, pharmaceutical industry, metallurgy, dye, food, brewing, ceramics, and environmental protection. For the currently applied filter cloth walking type filter press, when discharging, a driving motor drives multiple filter cloths through a driving shaft, gears and chains. The filter cloth moves up and down between filter plates to separate the mud cake from the filter cloth. Each time mud is discharged, the filter cloth has to move down to the lower limit position and then move up to the upper limit position. Due to the large number of transmission mechanisms between the driving motor and the filter cloth, it is extremely easy to cause operation obstacles of a single filter cloth, resulting in damage to the chain and the filter cloth. When directly starting the driving motor, the starting torque is large, the impact at the connection of each transmission is large, the action is too intense, and the vibration is large. The traditional method of controlling the driving motor to stop through a mechanical limit switch will cause the inertia of the driving motor to change when the service life of the filter cloth is different and the weight of the mud cake is different, resulting in a deviation in the stop position of the filter cloth, forming an obvious height difference between the feeder of the filter cloth and the feed port of the filter plate. The inaccurate position of the filter cloth will cause damage to the feeder, filter plate and diaphragm after the plates are closed. At this time, only by adjusting the mechanical limit switch can the position of the filter cloth be adjusted, which requires frequent adjustment and is difficult to adjust. When cleaning the filter cloth, the same problems as discharging mud are also faced. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems in the prior art that the motor has a large starting impact, the action is too intense and the vibration is large, and the accurate positioning of the filter cloth cannot be achieved, and to provide a filter cloth walking type filter press and a filter cloth control method.

[0004] To achieve the above object, the present invention adopts the following technical solutions: A filter cloth walking type filter press, comprising: a control device, a motor, a filter cloth, a support rod, a filter cloth drive shaft, a filter cloth drive chain, a frame and an encoder; the control device is connected to the motor, and the encoder is connected to the control device; the encoder is arranged on the filter cloth drive shaft for monitoring the movement of the filter cloth drive shaft; one end of the filter cloth drive shaft is externally connected to the motor; the other end of the filter cloth drive shaft is connected to the filter cloth drive chain through a gear; the control device issues an instruction to the motor according to the data monitored by the encoder to control the movement state of the filter cloth drive shaft; the filter cloth drive shaft is arranged on the support rod, and both ends of the support rod are respectively arranged on the frame; the filter cloth is double-layered, and one end of the filter cloth is connected to one end of the filter cloth drive chain; the other end of the filter cloth is connected to the other end of the filter cloth drive chain, and the traveling direction of the filter cloth is changed through a first cloth winding roller; the third end of the filter cloth is connected to one end of the next filter cloth drive chain; at this time, the filter cloth changes the traveling direction through a third cloth winding roller; the second cloth winding roller is arranged on one side of the filter cloth drive shaft for changing the traveling route of the filter cloth drive chain; the first cloth winding roller, the second cloth winding roller and the third cloth winding roller are arranged on a plane connected to the frame.

[0005] A further improvement of the present invention lies in: Further, there are several filter cloth drive shafts; the head of the filter cloth drive chain is connected to the tail of the current filter cloth drive chain and the tail of another filter cloth drive chain respectively through the filter cloth; the control device includes a PLC and a frequency converter; the frequency converter is connected to the PLC, and the PLC is connected to the motor; the frequency converter controls the output torque of the motor through the PLC.

[0006] Further, the control device issues an instruction to the motor according to the data monitored by the encoder to control the movement state of the filter cloth drive shaft. Specifically, the PLC receives the monitoring data of the encoder and calculates to obtain the actual height value of the filter cloth, and judges the height of the filter cloth. When the distance between the filter cloth position and the upper limit setting value or the lower limit setting value is less than or equal to the deceleration start distance setting value, deceleration starts. When the filter cloth is in other positions, the motor drives the filter cloth drive shaft to run at full frequency; the upper limit setting value, the lower limit setting value and the deceleration start distance are preset.

[0007] Further, the PLC receives the monitoring data of the encoder and calculates to obtain the actual height value of the filter cloth. Specifically, the encoder is a rotary encoder with a resolution of pulses / revolution; the top circumference of the filter cloth drive shaft is meters; the moving distance of the filter cloth represented by each pulse is meters / pulse; if the encoder generates pulses, then the actual moving distance of the filter cloth is meters; then the rising distance of the filter cloth is In meters, the actual height value of the filter cloth is the sum of the height change value of the filter cloth and the original height value.

[0008] Furthermore, when the distance between the position of the filter cloth and the upper limit setting value or the lower limit setting value is less than or equal to the deceleration start distance setting value, deceleration begins. The actual output frequency of the motor is the actual height value of the filter cloth * the deceleration ratio, and the deceleration ratio is the rated frequency of the motor / the deceleration start distance setting value.

[0009] Furthermore, the control device issues commands to the motor to control the motion state of the filter cloth drive shaft based on the data monitored by the encoder, and also includes: when the filter cloth runs to the upper limit setting value or the lower limit setting value, stop the operation of the frequency converter, and at the same time turn off the motor to stop the rotation of the filter cloth drive shaft.

[0010] Furthermore, the control device issues commands to the motor to control the motion state of the filter cloth drive shaft based on the data monitored by the encoder, and also includes: when the output torque of the motor exceeds the maximum torque set by the frequency converter, the frequency converter will send a fault signal to the PLC. When the PLC stops after reaching the upper limit setting value or the lower limit setting value, if it detects that the distance between the position of the filter cloth and the setting value is too large, a fault prompt is issued; the maximum output torque of the frequency converter is 80% of the rated torque of the motor, and the ramp-up time of the frequency converter is 3 seconds to prevent the sudden start of the filter cloth of the filter press.

[0011] A method for controlling the filter cloth of a filter cloth walking type filter press, including: starting the frequency converter, the motor, the PLC, and the encoder. The frequency converter controls the output torque of the motor through the PLC. The motor drives the filter cloth drive shaft to move under the control of the PLC. At the same time, the PLC issues commands to the motor to control the motion state of the filter cloth drive shaft based on the data monitored by the encoder, and at the same time determines whether the difference between the position of the filter cloth and the set upper limit setting value or the lower limit setting value is greater than the deceleration start distance setting value; if not, then control the PLC to issue a command to the motor to control the filter cloth drive shaft to decelerate; when the filter cloth runs to the upper limit setting value or the lower limit setting value, stop the operation of the frequency converter, and at the same time turn off the motor to stop the rotation of the filter cloth drive shaft; when the filter cloth drive shaft drives the filter cloth drive chain to move, the filter cloth moves under the drive of the head of the filter cloth drive chain. As the filter cloth descends, the filter cloth begins to separate. One side of the filter cloth rises around the first cloth roller under the drive of the tail of the other filter cloth drive chain, and the other side of the filter cloth rises around the third cloth roller under the drive of the tail of the current filter cloth drive chain; as the filter cloth rises, the filter cloth begins to merge. One side of the filter cloth rises around the first cloth roller under the drive of the current filter cloth drive chain, and the other side of the filter cloth rises around the third cloth roller under the drive of the current filter cloth drive chain.

[0012] Further, the PLC issues commands to the motor according to the data monitored by the encoder to control the motion state of the filter cloth driving shaft, including: converting the monitored data received by the PLC from the encoder to obtain the actual height value of the filter cloth, and judging the height of the filter cloth. Specifically, the encoder is a rotary encoder with a resolution of pulses per revolution; the circumference of the filter cloth driving shaft meters; the moving distance of the filter cloth represented by each pulse is meters per pulse; if the encoder generates pulses, then the actual moving distance of the filter cloth is meters; when the position of the filter cloth is less than or equal to the deceleration start distance setting value from the upper limit setting value or the lower limit setting value, deceleration starts, and the actual output frequency of the motor is the actual height value of the filter cloth * deceleration ratio, and the deceleration ratio is the rated frequency of the motor / deceleration start distance setting value.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a rotary encoder to real-time feedback the displacement data of the filter cloth driving shaft, and after being calculated by the PLC, accurately controls the motor speed to form a closed-loop regulation system, ensuring the stable and reliable operation of the pressure filtration process; the parallel layout of multiple filter cloth driving shafts is combined with a chain linkage mechanism, and under the synergistic action of the support rod and the guide roller, the synchronous operation of multiple sections of filter cloth is realized, which not only enhances the load-bearing stability of the system, but also reduces the single-axis load through distributed drive and prolongs the service life of the equipment; the unique double-layer filter cloth "unfolding-merging" cycle mode uses the first cloth roller and the third cloth roller to form an alternating guiding path, enabling the filter cloth to automatically complete the opening and closing actions during the lifting process, realizing the efficient and accurate automatic operation of the filter cloth walking type pressure filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic structural diagram of the filter cloth walking type pressure filter of the present invention.

[0016] Among them, 1 - the first cloth roller, 2 - the support rod, 3 - the filter cloth drive chain, 4 - the third cloth roller, 5 - the frame, 6 - the filter cloth, 7 - the filter cloth drive shaft, 8 - the second cloth roller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the detailed description of the embodiments of the present invention provided in the drawings below is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0020] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is usually placed during use, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0021] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0022] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings: See Figure 1, the present invention discloses a filter cloth walking type filter press, comprising: a control device, a motor, a filter cloth 6, a support rod 2, a filter cloth drive shaft 7, a filter cloth drive chain 3, a frame 5 and an encoder; the control device is connected to the motor, and the encoder is connected to the control device; the encoder is arranged on the filter cloth drive shaft 7 for monitoring the movement of the filter cloth drive shaft; one end of the filter cloth drive shaft 7 is externally connected to the motor; the other end of the filter cloth drive shaft 7 is connected to the filter cloth drive chain 3 through a gear; the control device issues an instruction to the motor according to the data monitored by the encoder to control the movement state of the filter cloth drive shaft 7; the filter cloth drive shaft 7 is arranged on the support rod 2, and both ends of the support rod 2 are respectively arranged on the frame 5; the filter cloth 6 is double-layered, one end of the filter cloth 6 is connected to one end of the filter cloth drive chain 3; the other end of the filter cloth 6 is connected to the other end of the filter cloth drive chain 3, and the traveling direction of the filter cloth 6 is changed through a first cloth winding roller 1; the third end of the filter cloth 6 is connected to one end of the next filter cloth drive chain 3; at this time, the traveling direction of the filter cloth 6 is changed through a third cloth winding roller 4; the second cloth winding roller 8 is arranged on one side of the filter cloth drive shaft 7 for changing the traveling route of the filter cloth drive chain 3; the first cloth winding roller 1, the second cloth winding roller 8 and the third cloth winding roller 4 are arranged on a plane connected to the frame 5.

[0024] There are several filter cloth drive shafts 7; the head of the filter cloth drive chain 3 is respectively connected to the tail of the current filter cloth drive chain 3 and the tail of another filter cloth drive chain 3 through the filter cloth 6; the control device includes a PLC and a frequency converter; the frequency converter is connected to the PLC, and the PLC is connected to the motor; the frequency converter controls the output torque of the motor through the PLC.

[0025] The control device issues an instruction to the motor according to the data monitored by the encoder to control the movement state of the filter cloth drive shaft 7, specifically: the PLC receives the monitoring data of the encoder and calculates to obtain the actual height value of the filter cloth, and judges the height of the filter cloth. When the distance between the filter cloth position and the upper limit setting value or the lower limit setting value is less than or equal to the deceleration start distance setting value, deceleration starts. When the filter cloth is in other positions, the motor drives the filter cloth drive shaft 7 to run at full frequency; the upper limit setting value, the lower limit setting value and the deceleration start distance are preset.

[0026] The PLC receives the monitoring data of the encoder and calculates to obtain the actual height value of the filter cloth. Specifically: the encoder is a rotary encoder, and its resolution is pulses per revolution; the top circumference of the filter cloth drive shaft 7 is meters; the moving distance of the filter cloth represented by each pulse is meters per pulse; if the encoder generates pulses, then the actual moving distance of the filter cloth is meters; then the rising distance of the filter cloth is meters.

[0027] When the position of the filter cloth is less than or equal to the deceleration start distance setting value from the upper limit setting value or the lower limit setting value, deceleration starts. The actual output frequency of the motor is the actual height value of the filter cloth * the deceleration ratio, and the deceleration ratio is the rated frequency of the motor / the deceleration start distance setting value.

[0028] The control device issues commands to the motor to control the motion state of the filter cloth driving shaft 7 based on the data monitored by the encoder. It also includes: when the filter cloth runs to the upper limit setting value or the lower limit setting value, stop the operation of the frequency converter and at the same time turn off the motor to make the filter cloth driving shaft stop rotating.

[0029] The control device issues commands to the motor to control the motion state of the filter cloth driving shaft 7 based on the data monitored by the encoder. It also includes: when the output torque of the motor exceeds the maximum torque set by the frequency converter, the frequency converter will send a fault signal to the PLC. When the PLC stops after reaching the upper limit setting value or the lower limit setting value, if it detects that the position of the filter cloth is too far from the setting value, a fault prompt will be issued; the maximum output torque of the frequency converter is 80% of the rated torque of the motor, and the ramp-up time of the frequency converter is 3 seconds to prevent the sudden start of the filter cloth of the filter press.

[0030] A method for controlling the filter cloth of a filter cloth walking type filter press, specifically: start the frequency converter, the motor, the PLC and the encoder. The frequency converter controls the output torque of the motor through the PLC. The motor drives the filter cloth driving shaft to move under the control of the PLC. At the same time, the PLC issues commands to the motor to control the motion state of the filter cloth driving shaft 7 based on the data monitored by the encoder, and at the same time determines whether the difference between the position of the filter cloth and the set upper limit setting value or lower limit setting value is greater than the deceleration start distance setting value; if not, then control the PLC to issue a command to the motor to control the filter cloth driving shaft 7 to decelerate; when the filter cloth runs to the upper limit setting value or the lower limit setting value, stop the operation of the frequency converter and at the same time turn off the motor to make the filter cloth driving shaft stop rotating; when the filter cloth driving shaft 7 drives the filter cloth driving chain 3 to move, the filter cloth 6 moves under the drive of the head of the filter cloth driving chain 3. As the filter cloth 6 descends, the filter cloth 6 begins to separate. One side of the filter cloth 6 rises around the first cloth winding roller 1 under the drive of the tail of the other filter cloth driving chain 3, and the other side of the filter cloth 6 rises around the third cloth winding roller 4 under the drive of the tail of the current filter cloth driving chain 3; as the filter cloth 6 rises, the filter cloth 6 begins to merge. One side of the filter cloth 6 rises around the first cloth winding roller 1 under the drive of the current filter cloth driving chain 3, and the other side of the filter cloth 6 rises around the third cloth winding roller 4 under the drive of the current filter cloth driving chain 3.

[0031] The PLC issues commands to the motor based on the data monitored by the encoder to control the movement state of the filter cloth drive shaft, including: converting the monitored data received by the PLC from the encoder to obtain the actual height value of the filter cloth, and judging the height of the filter cloth. Specifically: The encoder is a rotary encoder with a resolution of pulses per revolution; the circumference of the filter cloth drive shaft meters; the moving distance of the filter cloth represented by each pulse is meters per pulse; if the encoder generates pulses, then the actual moving distance of the filter cloth is meters; when the position of the filter cloth is less than or equal to the deceleration start distance setting value from the upper limit setting value or the lower limit setting value, deceleration starts. The actual output frequency of the motor is the actual height value of the filter cloth * the deceleration ratio, and the deceleration ratio is the rated frequency of the motor / the deceleration start distance setting value.

[0032] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A filter cloth walking filter press, characterized in that: include: A control device, a motor, a filter cloth (6), a support rod (2), a filter cloth drive shaft (7), a filter cloth drive chain (3), a frame (5) and an encoder; the control device is connected to the motor, and the encoder is connected to the control device; the encoder is arranged on the filter cloth drive shaft (7) and is used to monitor the movement of the filter cloth drive shaft; one end of the filter cloth drive shaft (7) is externally connected to the motor; the other end of the filter cloth drive shaft (7) is connected to the filter cloth drive chain (3) via a gear; the control device sends instructions to the motor to control the movement state of the filter cloth drive shaft (7) according to data monitored by the encoder; the filter cloth drive shaft (7) is arranged on the support rod (2), and both ends of the support rod (2) are respectively arranged on the frame (5). The filter cloth (6) is double-layered, one end of the filter cloth (6) is connected to one end of the filter cloth drive chain (3); the other end of the filter cloth (6) is connected to the other end of the filter cloth drive chain (3), and the travel direction of the filter cloth (6) is changed by a first cloth winding roller (1); the third end of the filter cloth (6) is connected to one end of the next filter cloth drive chain (3); at this time, the travel direction of the filter cloth (6) is changed by a third cloth winding roller (4); the second cloth winding roller (8) is arranged on one side of the filter cloth drive shaft (7) and is used to change the travel route of the filter cloth drive chain (3); the first cloth winding roller (1), the second cloth winding roller (8) and the third cloth winding roller (4) are arranged on a plane connected to the frame (5).

2. The filter cloth walking filter press according to claim 1, characterized in that: There are a plurality of filter cloth drive shafts (7); the head of the filter cloth drive chain (3) is connected to the tail of the current filter cloth drive chain (3) and the tail of another filter cloth drive chain (3) through the filter cloth (6); the control device comprises a PLC and a frequency converter; the frequency converter is connected to the PLC, and the PLC is connected to the motor; the frequency converter controls the output torque of the motor through the PLC.

3. The filter cloth walking filter press according to claim 2, characterized in that: The control device sends instructions to the motor to control the motion state of the filter cloth drive shaft (7) based on the data monitored by the encoder, specifically: the monitoring data received by the PLC encoder is converted to obtain the actual height value of the filter cloth, and the height of the filter cloth is determined. When the filter cloth position is less than or equal to the deceleration start distance setting value from the upper limit setting value or the lower limit setting value, deceleration begins. When the filter cloth is at other positions, the motor drives the filter cloth drive shaft (7) to run at full frequency; the upper limit setting value, the lower limit setting value and the deceleration start distance are preset.

4. The filter cloth walking filter press according to claim 3, characterized in that: The monitoring data of the encoder received by the PLC is converted to obtain the actual height value of the filter cloth, specifically: the encoder is a rotary encoder with a resolution of Pulse / rev; Top circumference of filter cloth drive shaft (7) Meters; each pulse represents the filter cloth moving distance meter / pulse; if the encoder generates pulses, then the actual moving distance of the filter cloth is Meters; the distance the filter cloth rises is The actual height of the filter cloth is the sum of the height change and the original height.

5. The filter cloth walking filter press according to claim 4, characterized in that: When the filter cloth position is less than or equal to the upper limit setting value or the lower limit setting value, deceleration begins. The actual output frequency of the motor is the actual height of the filter cloth * deceleration ratio, and the deceleration ratio is the motor rated frequency / deceleration start distance setting value.

6. The filter cloth walking filter press according to claim 5, characterized in that: The control device sends instructions to the motor based on the data monitored by the encoder to control the movement state of the filter cloth drive shaft (7), and also includes: when the filter cloth runs to the upper limit setting value or the lower limit setting value, stopping the operation of the inverter and turning off the motor at the same time, so that the filter cloth drive shaft stops rotating.

7. The filter cloth walking filter press according to claim 6, characterized in that: The control device sends instructions to the motor based on the data monitored by the encoder to control the movement state of the filter cloth drive shaft, and also includes: when the output torque of the motor exceeds the maximum torque set by the inverter, the inverter will send a fault signal to the PLC. When the PLC reaches the upper limit setting value or the lower limit setting value and stops, it detects that the position of the filter cloth is too far from the setting value and issues a fault prompt; the maximum output torque of the inverter is 80% of the rated torque of the motor, and the ramp-up time of the inverter is 3 seconds to prevent the sudden start of the filter cloth of the filter press.

8. A filter cloth control method for a filter cloth walking filter press, characterized in that: Acting on the filter cloth walking type filter press described in claim 7, the method is: starting the frequency converter, motor, PLC and encoder, the frequency converter controls the output torque of the motor through the PLC, the motor drives the filter cloth drive shaft to move under the control of the PLC, and at the same time the PLC sends instructions to the motor to control the movement state of the filter cloth drive shaft (7) according to the data monitored by the encoder, and at the same time judges whether the difference between the filter cloth position and the set upper limit setting value or lower limit setting value is greater than the deceleration start distance setting value; if not, control the PLC to send instructions to the motor to control the filter cloth drive shaft (7) to decelerate; when the filter cloth runs to the upper limit setting value or the lower limit setting value, stop the operation of the frequency converter, and at the same time turn off the motor to stop the filter cloth drive shaft from rotating; when the filter cloth When the drive shaft (7) drives the filter cloth drive chain (3) to move, the filter cloth (6) moves under the drive of the head of the filter cloth drive chain (3); as the filter cloth (6) descends, the filter cloth (6) begins to separate, the filter cloth (6) on one side winds around the first cloth roll (1) and is driven by the tail of the other filter cloth drive chain (3) to rise, and the filter cloth (6) on the other side winds around the third cloth roll (4) and is driven by the tail of the current filter cloth drive chain (3) to rise; as the filter cloth (6) rises, the filter cloth (6) begins to merge, the filter cloth (6) on one side winds around the first cloth roll (1) and is driven by the current filter cloth drive chain (3) to rise, and the filter cloth (6) on the other side winds around the third cloth roll (4) and is driven by the current filter cloth drive chain (3) to rise.

9. The filter cloth control method of the filter cloth walking filter press according to claim 8, characterized in that: The PLC sends instructions to the motor to control the motion state of the filter cloth drive shaft according to the data monitored by the encoder, including: converting the monitoring data received by the PLC encoder to obtain the actual height value of the filter cloth, and judging the height of the filter cloth, specifically: the encoder is a rotary encoder with a resolution of Pulse / rev; Circumference of filter cloth drive shaft Meters; each pulse represents the filter cloth moving distance meter / pulse; if the encoder generates pulses, then the actual moving distance of the filter cloth is Meters; when the filter cloth position is less than or equal to the upper limit setting value or the lower limit setting value, deceleration begins. The actual output frequency of the motor is the actual height of the filter cloth * deceleration ratio, and the deceleration ratio is the motor rated frequency / deceleration start distance setting value.

Images