JP3260702B2 - Automatic tuning device for filter plate conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic tuning device for a filter plate transport device that synchronizes the left and right filter plate transport devices when the filter plates are moved by transporting left and right handles of the filter plate.

[0002]

2. Description of the Related Art In the filter plate feeding method, at present, the filter plate is fed by left and right transport devices when the filter plates are moved by conveying the left and right handles of the filter plate. Speed controllers are provided at the outlets of the air cylinders that compose the right and left transfer units, respectively, and the filter plates are fed while synchronizing the speeds of the left and right cylinders.

[0003]

However, in the above-mentioned structure, when the device is used for a long period of time, if there is a load fluctuation, for example, if there is a problem such as contact with the guide or cylinder, the speed controller is sometimes manually operated. Had to be adjusted. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide an automatic tuning device for a filter plate transport device that does not require manual adjustment.

[0004]

In order to achieve the above object, the present invention is configured as follows. According to the first aspect of the present invention, the two air cylinders are constituted by two air cylinders, and the piston rods fixed to the pistons of the respective air cylinders are respectively engaged with handles protruding to the left and right of each filter plate. Equipped with a left and right filter plate transport device that moves the filter plate with the movement of the piston of the cylinder, a plurality of filter plates are clamped by the movable plate to the fixed plate side, and the slurry to be filtered by the filter cloth between adjacent filter plates While filtering
In a filter device in which the filter plate clamped by the movable plate is opened by the filter plate transport device to remove cake from between adjacent filter plates, the filter plates are arranged in the air outlet lines of the left and right air cylinders, respectively, to supply current. The left and right flow control valves that control and change the flow rate of air passing therethrough, a measuring device that measures the travel time of each piston of the left and right air cylinders between the same predetermined distance, and a measuring device that is measured by the measuring device. The difference between the movement times of the pistons of the left and right air cylinders is determined, and whether the difference is within the allowable range is determined.If the difference is outside the allowable range, the flow rate on the right side when the time is measured by the measuring instrument is determined. The difference between the current flow setting current value of the control valve and the set center current value of the right flow control valve, and the current flow of the left flow control valve when measuring time with the measuring instrument In whichever is greater of the difference between the set central current value of the set current value and the left side of the flow control valve,
When the set center current value is smaller than the current flow set current value, the correction current is subtracted from the current flow set current value. When the set center current value is larger than the current flow set current value, The present invention provides an automatic tuning device for a filter plate transport device, comprising a control device for controlling the left and right flow control valves with a new set current obtained by adding a correction current to a current flow setting current value. I do. According to the second aspect of the present invention, each of the left and right flow control valves increases the flow rate of the passing air when the current is increased, and decreases the flow rate of the passing air when the current is reduced. An automatic tuning device for a filter plate transport device according to the first aspect is provided.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3
1 schematically shows a filter press as an example of a filtration device to which a filter plate feeding device according to an embodiment of the present invention is attached. Side bars 4 and 4 are fixed on the left and right sides between the front stand 1 and the rear stand 2, and a number of filter plates 6,..., 6 are arranged on the pair of side bars 4 and 4. On each running rail 7 fixed to the side surface of the bar 4, a filter plate feeding device 10 is provided so as to be movable as described later. Each of the above-mentioned filter plate feeding devices 10 is provided with right and left filter plate handle feed portions MR and ML which engage with or separate from the filter plate 6 to feed the filter plate 6 (wherein, in the following alphabetical symbols, “R” stands for “R”). (L means a member or a device on the left side, and "L" means a member or a device on the left side.) And a filter that reciprocates the right and left filter plate handle feed portions MR and ML by the distance between the filter plate openings and drives the filter forward and backward. The filter plate moving devices 12 and 12 as an example of the plate transport device are roughly classified into drive devices 13 and 13 for moving the filter plate movers 12 and 12 forward or backward together with the filter plate handle feed units MR and ML.

Each of the left and right filter plate moving devices 12, 12 has a moving table 14, and the moving tables 14, 14 are connected to each other by a gate-shaped moving device frame 15. The movable table 1 is provided on the inner protruding portion of the base of the pillar portions 15a, 15a of the mobile device frame 15.
The latter half of 4,14 is fixed. Left and right pillar 1
The upper portions of 5a and 15a are connected by an upper connecting portion 15b. Further, the piston devices PR1, PL1 for driving the filter plate handle feed unit to advance and retreat are provided at positions protruding inward of the mobile unit frame 15 at the upper rear part of the movable tables 14, 14. Further, four front and rear running rollers 16,..., 16 are provided below the pillar portions 15a, 15a to which the movable bases 14, 14 are fixed, and the running rollers 16,. On top. The sprockets 17, 1 are mounted on the shafts of the front and rear running rollers 16,..., 16 of each pillar 15a.
8 are provided, and a sprocket 17 on the rear shaft and a sprocket 20 on the upper part of the pillar 15a are connected by a chain 21. The rear shaft sprocket 17 and the front shaft sprocket 1
8 are connected by a chain 19. The upper sprocket 20 and sprockets 22 at both ends of the front portion of the upper connecting portion 15b are further connected by a chain 23. A sprocket 25 is provided in the middle of a shaft 24 that supports the sprocket 22 at each end, and the sprocket 25 and the connecting portion 15b
Is rotatably connected to the drive motor 26 with brake. , 16, sprockets 17, 18, 20, 22, 25, chains 19, 21,
The drive system such as the drive device 23 and the drive motor 26
3 and 13. By the driving of the driving devices 13, 13, the filter plate feeding devices 10, 10 run on the running rails 7, 7.

[0007] Rollers attached to the right and left filter plate grip feeders MR and ML are placed on the front halves of the left and right moving tables 14 and 14, respectively. The filter plate grip feeders MR and ML are connected to the distal ends of the piston rods 27 and 27 of the piston devices PR1 and PL1, and move forward and backward on the front half of the movable bases 14 and 14. 2 is provided in each frame 11 of the filter plate grip feed portions MR and ML.
Three claws 30 and 31 are vertically movable. In order to send the filter plate 6 backward, that is, to the movable plate side (the right side in FIGS. 1 and 4), the front claw 30 is raised, and is sent to the front surface of each handle 6f of the filter plate 6, and the filter plate 6 is moved forward. That is, the fixed plate 3 side (FIG. 1,
4 (left side in FIG. 4), the rear claw 31 is raised, and is sent to the rear surface of each handle 6 f of the filter plate 6. At this time, the rear claw 31 with respect to the front claw 30 and the front claw 30 with respect to the rear claw 31 are respectively provided with the filter plate grip feed portions MR and ML.
Used as a stop claw (stopper).

As shown in FIGS. 3 and 4, the filter plate handle feed portions MR and ML are air cylinders PR for raising and lowering the two claws 30 and 31 respectively on a bottom plate 11a in each frame 11.
2, PL2, PR3, and PL3 are fixed. Frame 11
Inside, the two claws 30 and 31 are guided from both front and rear sides along a pair of guide plates 32 and 32 to move up and down. The lower part of the guide plates 32, 32 is the bottom plate 11 in the frame.
a. Each frame 1 of filter plate handle feeder MR, ML
The surface exposed from 1 is covered with a cover 33. Each cover 33 has a hole 3 in which the two claws 30, 31 appear and disappear.
3a and 33a are opened. Filter plate handle feeder MR,
As shown in FIGS. 1 and 5, the first sensors SR1 and SL1 and the second sensors SR2 and S
L2 and third sensors SR3 and SL3 are provided. The first sensor SR1, SL1 and the second sensor SR2, SL2 are used when the filter plate 6 is sent to one side, for example, the rear movable plate side, and the second sensor SR2, SL2 and the third sensor SR are used.
3, SL3 is used when sending the filter plate 6 to the other side, for example, the fixed plate side.

A sixth sensor SR6, SL6 is provided on a lower surface of a front portion of a moving table 14 of each filter plate moving device 12, and a seventh sensor SR7, SL7 is provided on a lower surface of a rear part of the moving table 14. I have. The sixth sensors SR6 and SL6 are used to return the filter plate moving devices 12 and 12 that have moved near the fixed plate 3 to the movable plate direction, and the seventh sensors SR7 and SL7 control the filter plate moving devices 12 and 12 to move. Used to stop at the standby position behind the movable plate. Fourth sensors SR4, SL are provided in front of the piston devices PR1, PL1 for moving the filter plate handle forward / backward.
4 and a fifth sensor S
R5 and SL5 are provided. Fourth sensor SR4, S
L4 is the piston 28 of the piston device PR1, PL1,
28, and the fifth sensor SR5, SL
Numeral 5 is used to detect the backward position of the pistons 28, 28.

The upper connecting portion 15b of the gate-shaped mobile device frame 15 is provided with eighth sensors SR8 and SL8. The eighth sensors SR8 and SL8 are used to stop the traveling of the filter plate moving devices 12 and 12 at a predetermined position during opening.
In the drawing, when the connecting top 41 of the known filter cloth hanging pantograph 40 is positioned at the center of the opening distance by the opening of the filter plate, the mobile unit frame 15 is run by a signal from the control device CT, and the eighth sensor in the mobile unit frame 15 is moved. SR8 and SL8 detect the connection top 41 of the pantograph 40, and the traveling of the mobile unit frame 15 stops. Each of the above sensors SR1 to SR8, SL1
To SL8 are connected to the control device CT as shown in FIG. The eighth sensor SR8, SL8 is a pantograph 4
It is easy to design to detect other parts of the filter plate 6 instead of detecting the connection top 41 of 0.

The supply ports of the air cylinders PR2, PL2, PR3, and PL3 for raising and lowering the two claws 30 and 31 in the frames 11 of the filter plate handle feed sections MR and ML are respectively connected to the driving air control valve Vx. Conduit FR1, FR2, FL
1 and FL2. Filter plate handle feeder M
The switching valves VR1 and V1 are provided near the supply ports of the air cylinders PR2 and PL2 for raising and lowering the claws 30 and 30 at the front of R and ML.
L1 and a switching valve VR near the supply ports of the air cylinders PR3 and PL3 for raising and lowering the rear claws 31 and 31.
2, VL2. The air supply / discharge ports at the front of the piston devices PR1 and PL1 that move the filter plate handle feed portions MR and ML on the front half of the movable bases 14 and 14 and move forward and backward, respectively, are located on one side of the switching valves VR3 and VL3. Certain ports and conduits FR3, F
Connected through L3. The flow valves VR4 and VL4 are provided in the middle of the conduits FR3 and FL3. An air supply / discharge port at the rear of the piston devices PR1, PL1 is connected to another port on one side of the switching valves VR3, VL3 and a conduit FR4.
It is linked through FL4. Electropneumatic proportional valves VRA and VLA, which are flow control valves, are connected in the middle of the conduits FR4 and FL4. The other supply port side of the switching valves VR3 and VL3 is connected to the driving air control valve Vx and the conduit FR.
5, FL5. After each of the above valves is placed in the pillar 15a of the mobile device frame 15 as shown in FIG.
Connected to an external air control device ACT.

The first of the filter plate handle feed portions MR on one side (right side)
Sensor SR1, second sensor SR2, and third sensor SR3
Are electrically connected to the control device CT through conductors ER1, ER2, and ER3, respectively. Also, the other side (left side)
The first sensor SL1, the second sensor SL2, and the third sensor SL3 of the filter plate handle feeder ML of the first embodiment are connected to the conductors EL1, E, respectively.
It is electrically connected to the control device CT through L2 and EL3. Fourth sensor SR located in front of piston devices PR1 and PL1 that move back and forth through filter plate grip feeders MR and ML
4 and SL4 are electrically connected to the control device CT through conductors ER4 and EL4. Further, fifth sensors SR5 and S5 located at the rear of the piston devices PR1 and PL1.
L5 is electrically connected to the control device CT through conductors ER5 and EL5. The sixth sensors SR6 and SL6 on the lower surface of the front portions of the movable bases 14 and 14 are connected to conductors ER9 and EL9
And is electrically connected to the control device CT. Mobile platform 14,
Seventh sensors SR7 and SL7 on the rear lower surface of 14 are electrically connected to the control device CT by wires ER10 and EL10. The eighth sensors SR8 and SL8 in the upper connection portion 15b of the mobile device frame 15 are electrically connected to the control device CT through the conductors ER11 and EL11.

Both ends of the switching valves VR3 and VL3 are
The controller CT and the conductors ER6, EL6 and ER, respectively.
7, EL7 electrically connected. The input sides of the flow control valves VRA, VLA are electrically connected to the control device CT through conductors ER8, EL8, respectively. Conductor E
Power amplifiers PAR and PAL are electrically connected near control valves VRA and VLA of R8 and EL8. Also,
As shown in FIG. 1, reaction plates H1, H1 are provided at the rear of the running rails 7, 7, and the reaction plates H1, H1 are connected to a seventh sensor S.
Reacts with R7 and SL7. As shown in FIG. 4, reaction plates H2 and H2 are provided at the front of the running rails 7 and 7,
2 and H2 react with the sixth sensors SR6 and SL6. In addition, the first sensor SR provided in the filter plate grip feed units MR and ML
1, SL1, second sensor SR2, SL2, third sensor S
R3 and SL3 are the handles 6 of the respective filter plates 6 during the feeding of the filter plates.
The handles 6f, 6f are detected by reacting with the lower surfaces of the handles f, 6f.
The second sensors SR2 and SL2 also detect the protrusions 5f and 5f by reacting with the lower surfaces of the protrusions 5f and 5f on the movable plate 5. The third sensors SR3 and SL3 also detect the protrusions 3f, 3f by reacting with the lower surfaces of the protrusions 3f, 3f on the fixed plate 3.

Next, the operation of the filter plate feeding device 10 will be described. A filter plate feed start signal is issued from an operation panel (not shown), and the movable plate 5 is retracted by an opening distance by driving a known filter plate opening device. The connecting top 41 of each filter cloth hanging pantograph 40 connecting the movable plate 5 and the filter plate to be fed, for example, the filter plate 6A of FIG. 1, is located at the center of the open plate distance L. Next, it is driven by input of a drive signal from the control device CT to the motor 26 with brake, so that the filter plate moving device 12,
When the vehicle 12 starts traveling forward, the seventh sensor SR7,
SL7 separates from reaction plates H1, H1 on running rails 7, 7. Further, the filter plate moving devices 12 and 12 travel forward, and the eighth sensor SR provided at the upper connecting portion 15b of the moving device frame 15 is moved.
8, SL8 is the connection top 4 of the pantographs 40, 40
1 by detecting and reacting with
From T, a drive stop signal is input to the motor with brake 26,
The filter plate movers 12, 12 stop running.

Next, air is supplied from outside through the air control valve Vx to the piston devices PR1 and PL1 located at the inside protruding portions of the pillar bases of the mobile unit frame 15. Air enters the switching valves VR3 and VL3 from the conduits FR5 and FL5, and flows from the switching valves VR3 and VL3 to the rear of the piston devices PR1 and PL1 through the conduits FR4 and FL4 and the flow control valves VRA and VLA interposed therebetween. Enter each air supply and exhaust port. As a result, the piston devices PR1, PL
The pistons 28 move forward, and the filter plate grip feed portions MR, ML fixed to the tip of the piston rod are moved to the rollers 2
, 29 are advanced under the handles 6f, 6f of the filter plate 6A while rolling on the movable bases 14, 14. At this time, the pistons 28,
The air on the front side of the piston devices PR1 and P2
Air is supplied from the air supply / discharge port at the front of L1 to the conduit FR.
3, switching valve VR through flow valves VR4 and VL4 of FL3
3, VL3 is discharged from the discharge port. Filter plate handle feeder M
R and ML advance below the handles 6f and 6f of the filter plate 6A, and stop claws 31 and 31 (when the filter plate 6 is sent to the movable plate side,
The rear pawls 31, 31 serve as stop pawls for the filter plate handle feed sections MR, ML. ) Hits the rear surface of the handles 6f, 6f of the filter plate 6A, the first sensors SR1, SL1 cause the first sensor SR1, SL1 to handle the handle 6f of the filter plate 6A.
The handles 6f, 6f are detected by reacting with the lower surfaces of the pistons PR, PL1, and the air supply to the air supply / discharge ports at the rear of the piston devices PR1, PL1 is stopped by the control of the control device CT. , ML stop.

Before the filter plate grip feed portions MR and ML approach the filter plate 6A, the feed claws 30, 30 (when the filter plate 6 is fed to the movable plate side, the front claws 30, 30 become feed claws. ) Is lowered so as not to come into contact with the handles 6f, 6f.
1, 31 (when the filter plate 6 is sent to the movable plate side, the rear claw 3
Reference numerals 1 and 31 serve as stop claws of the filter plate handle feed sections MR and ML. ) Is raised so as to contact the handles 6f, 6f. Here, in order to raise the front claws 30, 30, the front air cylinder P in the filter plate handle feed portions MR, ML is used.
In order to supply air to R2 and PL2 via the air control valve Vx, the switching valves VR1 and V1
In order to open L1 and supply air to the rear air cylinders PR3, PL3 of the filter plate grip feed units MR, ML to raise the rear claws 31, 31, conduits FR2, F
The switching valves VR2 and VL2 in L2 are opened. Front nail 3
In order to lower the 0, 30 and rear claw 31, 31, respectively, the supplied air may be discharged from each air cylinder.

The first sensors S of the filter plate grip feed units MR and ML
When R1 and SL1 react with and detect the lower surfaces of the handles 6f and 6f of the filter plate 6A, a signal is sent to the control device CT through the conductors ER2 and EL2, and the front air cylinders in the filter plate handle feed units MR and ML are sent. Air is supplied to PR2, PL2 via an air control valve Vx to raise the feed claws 30, 30, and air is supplied to the supply / discharge ports at the front of the piston devices PR1, PL1 in reverse to the previous time, and the pistons Air flows through conduit FR from the supply / discharge port at the rear of devices PR1 and PL1.
Switching valve V through flow control valves VRA and VLA of FL4 and FL4
R3 and VL3 are discharged from the discharge ports, and the piston device P
The pistons 28, 28 of R1, PL1 are switched to reverse. At this time, the movement time of each piston 28, 28 of the piston devices PR1, PL1 is measured by the measuring device 100 (see FIG. 7). Further, the amount of air flowing out of the flow control valves VRA and VLA is electrically controlled. Piston device PR on both sides
1, the feed error of PL1 is determined by the controller CT as described later.
Is easily corrected by the tuning operation of the tuning control unit.

When the pistons 28, 28 are switched to the backward movement, the filter plate handle feed portions MR, ML are moved to the movable base 1
Rollers 29,..., 29 are supported by the rollers 29,. At this time, the feed claws 30, 30 are attached to the filter plate 6A.
The filter plate 6A is sent to the movable plate 5 while being engaged with the front surfaces of the handles 6f, 6f. As a result, the connection top 41 between the pantograph 40 of the filter plate 6B located in front of the filter plate 6A and the pantograph 40 of the filter plate 6A is located at the center of the new opening distance. When the feed claws 30, 30 start feeding the filter plate 6A, the filter plate handle feeder M is controlled by the control device CT.
By discharging the air supplied to the rear air cylinders PR3 and PL3 of R and ML, the stop claws 31 and 31 are discharged.
Is lowered. When the filter plate grip feeders MR and ML move to the movable plate side, and the second sensors SR2 and SL2 react with and detect the lower surfaces of the protrusions 5f and 5f on the movable plate side, they are controlled by the control device CT. , Piston device PR1, PL1
Is stopped, and the piston devices PR1 and PL1 stop the retreating movement of the filter plate grip feed portions MR and ML. While the filter plate 6A is being fed and while the filter plate movers 12, 12 are stopped, the pantograph 40,
The cake is discharged from the filter cloths 8 suspended from the filter 40, and a filter cloth vibrating device and a filter cloth cleaning device (not shown) are operated.

Next, the filter plate 6 arranged in front of the filter plate 6A
Send B. In the same manner as described above, a drive signal is input from the control device CT to the motor with brake 26, and the filter plate movers 12, 12 travel forward. The eighth sensors SR8, SL8 of the advancing filter plate movers 12, 12 react with and detect the connection top 41 of the pantographs 40, 40 straddling between the filter plate 6A and the filter plate 6B, and detect and move the filter plate. The machines 12, 12 stop. Air is supplied to the piston devices PR1 and PL1, and the filter plate handle feed portions MR and ML are advanced on the movable bases 14 and 14 below the handles 6f and 6f of the filter plate 6B. Filter plate handle feeder M
When R and ML separate from the filter plate 6A, the feed claws 30, 30
Are disengaged and lowered from the front surfaces of the handles 6f, 6f of the filter plate 6A, and the stop claws 31, 31 are connected to the projections 5 of the movable plate 5.
f, 5f and after passing through the handles 6f, 6f of the filter plate 6A,
To rise. When the filter plate handle feeders MR and ML advance to the filter plate 6B, the stop claws 31 and 31 are pulled by the handles 6f and 6f of the filter plate 6.
Hit the back.

At this time, the first sensors SR1 and SL1 of the filter plate handle feed portions MR and ML react with and detect the lower surfaces of the handles 6f and 6f of the filter plate 6B, and when the feed claws 30 and 30 rise, Piston 28 of piston device PR1, PL1,
28 switches to reverse. As in the case of sending the filter plate 6A, the movement time of the pistons 28, 28 of the piston devices PR1, PL1 is measured by the measuring device 100, and the air outflow amounts of the flow control valves VRA, VLA are electrically controlled. You. The filter plate grip feed portions MR and ML retreat on the movable bases 14 and 14, and the feed claws 30 and 30 are engaged with the front surfaces of the grips 6f and 6f of the filter plate 6 and the filter plate 6A which previously sent the filter plate 6B. To send to. As a result, the filter plate 6 located in front of the filter plate 6B
The connection top 41 between the pantograph 40 of C and the pantograph 40 of the filter plate 6B is also located at the center of the new opening distance. Thereafter, similarly, by feeding the filter plate 6 to the last filter plate 6, the filter plate feeding for sending the filter plates 6,.

Next, when returning the filter plate feeder 10 to the standby position behind the movable plate, the filter plate movers 12, 12 are advanced by a signal from the control device CT. The feed claws 30, 30 are disengaged from the front faces of the handles 6f, 6f of the filter plate 6 and are kept lowered, and the stop claws 31, 31 are not raised even if they pass under the handle. When the filter plate movers 12, 12 advance, the eighth sensor SR of the filter plate movers 12, 12,
8, SL8 reacts with and detects the connection tops 41, 41 of the pantographs 40, 40 straddling between the fixed plate 3 and the filter plate 6, and the filter plate movers 12, 12 are stopped. Also, the sixth sensors SR6, SL on the lower surface of the front portions of the movable bases 14,
6 reacts with reaction plates H2, H2 at the front of the running rails 7, 7 to detect this. The filter plate feeding device 10 is set to the backward position toward the rear of the movable plate, and the piston device P
In a state where air is supplied to R1 and PL1, the pistons 28 and 28 are located at the rear end position and the filter plate grip feed units MR and ML are retracted, the drive motor 26 with a brake is driven by the filter plate moving device 12 and 12 is moved backward on the running rails 7,7. When the seventh sensors SR7, SL7 on the lower surfaces of the moving tables 14, 14 of the filter plate moving devices 12, 12, detect the rear reaction plates H1, H1 on the traveling rails 7, 7, the drive of the drive motor 26 with brake is performed. Stop. As a result, the filter plate feeding device 10 returns to the standby position behind the movable plate.

Next, a case where the filter plate 6 located on the movable plate side is sent to the fixed plate side will be described. As a result of sending all the filter plates 6 to the movable plate side, the filter plate 6 (the filter plate indicated by reference numeral 6Z in FIG. 4) positioned adjacent to the fixed plate 3 is separated from the fixed plate 3 by a predetermined opening distance. It is assumed that only the movable plate 5 is separated. In this state, the pantograph 4 of the fixing plate 3
The filter plate movers 12, 12 are advanced from the standby position so that the eighth sensors SR8, SL8 of the filter plate movers 12, 12 react to and detect the connection top 41 of the pantograph 40 of the filter plate 6Z with 0. When the connection top 41 is detected by the eighth sensors SR8 and SL8, the filter plate moving devices 12 and 12 are stopped. In this case, the rear claws 31, 31 of the filter plate grip feed portions MR, ML become filter plate feed claws, and the front claws 30, 30 become stop claws of the filter plate grip feed portions MR, ML. The piston devices PR1, P in the stopped filter plate moving machines 12, 12,
When air is supplied to L1 and the filter plate handle feed portions MR and ML are retracted to the filter plate 6Z, the first sensors SR1 and SL1 react to and detect the handles 6f and 6f of the filter plate 6Z. The feed claws 31, 31 are raised at the rear side of the handles 6f, 6f. At this time, the stop claws 30, 30 hit the front surfaces of the handles 6f, 6f. With the feed claws 31, 31 engaged with the rear surfaces of the handles 6f, 6f of the filter plate 6Z, the piston devices PR1, PL1 are driven to drive the filter plate grip feed portions MR, M.
L is advanced, and the filter plate 6Z is sent to the fixed plate 3. At this time, the stop claws 30, 30 are descending. When the filter plate 6Z is sent to the fixed plate 3, the third sensors SR3 and SL3 of the filter plate grip feed portions MR and ML react to and detect the protrusions 3f and 3f of the fixed plate 3, and as a result, the piston device PR
1, the pistons 28 of PL1 are switched to reverse.
As a result, the feed claws 31, 31 are attached to the handle 6 of the filter plate 6Z.
f, 6f are disengaged and separated from the rear surface and descend. The filter plate grip feeders MR and ML move backward to the next filter plate 6Y to be fed. First sensors SR1 and S of filter plate handle feed sections MR and ML
When L1 reacts with and detects the lower surfaces of the handles 6f, 6f of the filter plate 6Y, the feed claws 31, 31 move up behind the handles 6f, 6f of the filter plate 6Y. When the stop claws 30, 30 hit the front surfaces of the handles 6f, 6f of the filter plate 6Y, the filter plate movers 12, 12 stop the reverse drive. At this time, the filter plate 6Y
And a predetermined opening distance between the filter plate 6Z and
While the filter plate movers 12 and 12 are stopped, cake discharge and the like are performed as described above.

Next, the filter plate movers 12, 12 are advanced toward the fixed plate 3, and the eighth sensors SR8, SL8 are connected to the top 41 of the pantograph 40 of the filter plate 6Y and the pantograph 40 of the filter plate 6Z in the same manner as described above. When this is detected in response to, the filter plate movers 12, 12 stop running. In this state, the piston devices PR1 and PL1 are driven while the feed claws 31 and 31 are kept in contact with the rear surfaces of the handles 6f and 6f of the filter plate 6Y to advance the filter plate handle feed portions MR and ML on the movable bases 14 and 14. Then, the filter plate 6Y is sent to the filter plate 6Z. As a result, the pantograph 40 of the filter plate 6Y and the rear filter plate 6X next to the filter plate 6Y
The top 41 connected to the pantograph 40 is located at the center of the new opening distance.

Thereafter, the filter plate 6X is similarly sent to the fixed plate side. FIG. 4 shows a state in which the filter plate feeding device 10 sends the filter plate 6X. By sending the filter plate 6 to the last filter plate 6, the filter plate feeding for sending the filter plates 6,..., 6 to the other fixed plate side is completed. Then, the feed claws 31, 31 and the stop claws 30, 30 are lowered to return the filter plate movers 12, 12 to the standby position behind the movable plate as described above. Here, when a difference in the feed speed occurs between the two piston devices PR1 and PL1 for feeding the filter plate 6 during the filter plate feed, the difference in the feed speed is determined by the following method shown in FIG. , That is, the speed is adjusted to synchronize the two piston devices PR1 and PL1. This tuning operation is performed by the tuning control unit of the control device CT of FIG.

(Step S1) First, the piston 28 of the right piston device PR1 moves from the position AR detected by the fourth sensor SR4 to the position B detected by the fifth sensor SR5.
The time T1 of the movement to the distance R is measured by the measuring device 100, and the piston 2 of the piston device PL1 on the left side is measured.
8 from the position AL detected by the fourth sensor SL4 to the fifth
The measuring device 100 measures the time T2 of moving the distance to the position BL detected by the sensor SL5. (Step S2) First comparator 101 of control device CT
, The respective times T1 and T2 measured by the measuring instrument 100
Is determined, and it is determined whether the difference T1-T2 is larger or smaller than an absolute value | ΔT | of a preset difference setting value ΔT. (Step S3) In step S2, the first comparator 101 of the control device CT determines the difference T between the times T1 and T2.
When it is determined that 1-T2 is larger than the time | ΔT | (Yes), the flow rate control valves (electro-pneumatic proportional valves) VRA and VLA are electrically controlled by the control device CT in steps S3 to S9, and The flow rate of air passing through the electropneumatic proportional valves VRA and VLA is changed. The flow rate of air is designed to increase as the current increases and decrease as the current decreases. When the flow rate of the air increases, the measurement time T
1 or T2 becomes shorter, and as the flow rate of air decreases, the same time T1 or T2 becomes longer. This flow control valve VRA,
The method of electrically controlling the VLA will be described in detail. In step S3, the second comparator 10 of the controller CT is used.
Reference numeral 2 denotes a current flow setting current value FD of the flow control valve VRA in the right piston device PR1 when the time is measured by the measuring device, and a set center current value (setting reference) set in advance as a reference for tuning control. Current value) Difference from FDS |
FD-FDS | and a current value FD indicating the current flow rate setting current value of the flow rate control valve VLA in the left piston device PL1 when the time is measured by the measuring device, and is previously set as a reference for the tuning control. The differences | FD−FDS | from the set center current value (set reference current value) FDS are obtained, and these two differences are compared in the control device CT.

(Step S4) In step S3,
By the second comparator 102 of the control device CT, the current difference | F on the flow control valve VRA side of the right piston device PR1 is | F.
When it is determined that D-FDS | is larger than the difference | FD-FDS | of the current on the flow control valve VLA side of the left piston device PL1 (Yes), in step S4,
By the third comparator 103 of the control device CT, the difference FD between the current flow set current value FD and the set center current value FDS on the flow control valve VRA side of the right piston device PR1.
-Take FDS. (Step S5) On the other hand, in step S3, the difference | FD-FDS | of the current on the right flow control valve VRA is changed by the second comparator 102 of the control device CT to the current on the left flow control valve VLA. When it is determined that the difference is not larger than the difference | FD−FDS | (No), in step S5, the fourth comparator 104 of the control device CT determines the current state on the flow control valve VLA side of the left piston device PL1. FD-FDS between the flow set current value FD and the set center current value FDS. (Step S6) In step S4, the third comparator 103 of the control device CT outputs the right piston device P.
Current flow setting current value F on the flow control valve VRA side of R1
If it is determined that D is greater than or equal to the set center current value FDS (Yes), in step S6, the arithmetic unit 105 of the control device CT causes the right piston device PR1 to be operated.
The constant current value a ₁ is subtracted from the current flow setting current value FD on the side of the flow control valve VRA.

(Step S7) In step S4,
When the third comparator 103 of the control device CT determines that the current flow setting current value FD on the flow control valve VRA side of the right piston device PR1 is not equal to or greater than the setting center current value FDS (No). in step S7, the arithmetic unit 105 of the controller CT, applying a constant current value a ₁ to the flow rate set current value FD of the current flow rate control valve VRA side of the right piston device PR1. (Step S8) In step S5, the fourth comparator 104 of the control device CT makes the left piston device P
Current flow setting current value F on the flow control valve VLA side of L1
When it is determined that D is greater than or equal to the set center current value FDS (Yes), in step S8, the arithmetic unit 106 of the control device CT causes the left piston device PL1 to operate.
The constant current value a ₁ is subtracted from the current flow setting current value FD on the flow control valve VLA side. (Step S9) In step S5, the fourth comparator 104 of the control device CT makes the left piston device P
Current flow setting current value F on the flow control valve VLA side of L1
If it is determined that D is not equal to or larger than the set center current value FDS (No), in step S9, the controller C
The T of the calculation unit 106, the flow rate set current value FD of the current flow rate control valve VLA side of the left piston device PL1 applying a constant current value a _1.

As described above, in steps S6 to S9, the constant current value a _{1 with} respect to the current flow setting current value FD.
The current flow setting current value FD is made as close as possible to the set center current value FDS by adding or subtracting. The constant current value a ₁ is set as a plurality of current values as candidates for the constant current value in a stepwise and selectable manner and stored in a memory. From among them, a current value close to the difference between the current flow setting current value FD and the set center current value FDS may be automatically selected and used as a constant current value. However, in some cases, the current can be adjusted manually. When performing the current adjustment manually, the operator adjusts the current value as appropriate, and adds or subtracts the above constant current value as the correction current value to the current flow rate setting current value FD. Also in this case, as the correction current, a plurality of selectable current values are displayed on the device in a stepwise manner, and the operator mechanically presses the button from among the displayed plurality of current values. For example, the current value may be selected and adjusted.

In step S2, the difference T1-T2 is calculated by the first comparator 101 of the control device CT.
Is not greater than the set time | ΔT | (No), it is determined that adjustment for tuning is unnecessary, and the flow rate control valves VRA and VLA are not controlled. Continue or terminate the operation. Alternatively, re-measurement of the times T1 and T2 in step S1 may be performed by the measuring instrument 100 as shown in FIG. Also, after step S7, the control may be terminated as described above, or the measurement may be performed again. Thus, the control device CT
By controlling the flow control valves VRA and VLA on the left and right with the new set current obtained by the above,
The left and right flow control valves (electro-pneumatic proportional valves) VRA, VLA are electrically controlled to change the flow rate of the air passing through the electro-pneumatic proportional valves VRA, VLA, so that the right and left piston devices PR1, PL1 are changed. Of the fourth sensor S
From the position detected by R4 and SL4, the fifth sensor SR5
The speed can be adjusted so that the difference (T1-T2) between the respective times T1 and T2 during which the distance to the position to be detected by SL5 is moved does not become larger than the set difference set value ΔT. Therefore, the left and right filter plate movers 12, 12
Can automatically synchronize the moving speed of the handle 6f of the filter plate 6 within a predetermined allowable range.

According to the above embodiment, the pistons 28, 28 of the left and right filter plate moving units 12, 12 are connected to the fourth sensor SR.
From the position detected by the fourth and SL4 to the fifth sensor SR5 and S
Each time T1 and T2 at which the distance to the position to be detected at L5 is moved is obtained by the measuring device 100, and the difference between the two times (T
1-T2) is within the allowable range, and if it is within the allowable range, no particular tuning control is performed. If it is outside the allowable range, the current flow setting current value FD of the right and left flow control valves VRA and VLA is determined. Changes the current flow setting current value FD of the flow control valve farther away from the set center current value FDS by a constant current value, that is, a fixed correction current a ₁ so as to approach the set center current value FDS. By changing the amount of air passing through the flow control valve by changing the current value, the pistons 28, 28 of the left and right filter plate moving devices 12, 12 are changed.
The control device CT automatically adjusts the moving speed of the motor. Therefore, use in the long term, load fluctuation,
Even if there is a problem of hitting the guide or hitting the cylinder, tuning control can be performed automatically, and the pistons 28, 28 of the left and right filter plate moving machines 12, 12 are manually operated.
There is no need to tune the moving speed of the camera.

[0031]

According to the present invention, the respective times when the pistons of the left and right filter plate moving machines have moved the same predetermined distance are obtained by a measuring instrument, and it is determined whether or not the difference between the two times is within an allowable range. If it is out of the allowable range, the measured current of the right and left flow control valves is set to a constant current by setting the current flow set current value of the flow control valve whose current flow set current value is farther from the set center current value to a constant current. Value, that is, the correction current, so as to approach the set center current value, and by changing the amount of air passing through the flow rate control valve according to the change in the current value, the movement speed of the pistons of the left and right filter plate moving devices is synchronized. Is automatically performed by the control device. Therefore, even in the case of long-term use, even if there is a load fluctuation, such as a problem of contact with the guide or cylinder, etc., the tuning control can be performed automatically. It is not necessary to adjust the moving speed of the piston synchronously.

[Brief description of the drawings]

FIG. 1 is a side view showing a rear portion of a filtration device having an automatic tuning device of a filtration plate transport device according to an embodiment of the present invention.

FIG. 2 is a partial front view of the filtration device.

FIG. 3 is an exploded perspective view of a filter plate handle feeding section of the filter plate transport device of the filter device.

FIG. 4 is a side view showing a front portion of the filtration device.

FIG. 5 is a diagram showing an air supply drive circuit and an electric circuit of the automatic tuning device.

FIG. 6 is a flowchart showing a tuning operation of the automatic tuning device.

FIG. 7 is a block diagram of a tuning control unit of a control device that performs a tuning operation of the automatic tuning device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Front stand, 2 ... Rear stand, 3 ... Fixing plate, 3f ...
Handle, 4 ... Sidebar, 5 ... Movable plate, 5f ... Handle, 6 ...
Filter plate, 6f ... handle, 7 ... running rail, 8 ... filter cloth, 10 ...
Filter plate feeding device, 11: frame, 12: filter plate moving device, 13: driving device, 14: moving table, 15: moving device frame, 15a: pillar portion, 15b: upper connecting portion, 16: running roller, 17 , 1
8, 20, 22, 25 ... sprockets, 19, 21,
3 ... Chain, 24 ... Shaft, 26 ... Drive motor with brake, 27 ... Piston rod, 28 ... Piston, 29 ... Roller, 30, 31 ... Claw, 32 ... Guide plate, 100 ... Measuring instrument, 101 ... First comparator , 102... Second comparator, 103
... Third comparator, 104... Fourth comparator, 105, 106.
Arithmetic unit. ACT: air control device, CT: control device, E
R1, ER2, ER3, ER4, ER5, ER6, ER
7, ER8, ER9, ER10, ER11, EL1, E
L2, EL3, EL4, EL5, EL6, EL7, EL
8, EL9, EL10, EL11 ... conductor, FR1, FL
1, FR2, FL2, FR3, FL3, FR4, FL
4, FR5, FL5: conduit, H1, H2: reaction plate, M
R, ML: filter plate handle feed portion, PAR, PAL: power amplifier, PR1, PL1: filter device handle feed portion advance / retreat driving piston device, PR2, PL2, PR3, PL3: air cylinder, SR1, SL1 ... first Sensor, SR2, SL
2: Second sensor, SR3, SL3: Third sensor, SR
4, SL4: fourth sensor, SR5, SL5: fifth sensor, SR6, SL6: sixth sensor, SR7, SL7: seventh sensor, SR8, SL8: eighth sensor, VR1, VL
1, VR2, VL2, VR3, VL3 ... switching valve, VR
4, VL4: a flow valve, VRA, VLA: a flow control valve (electro-pneumatic proportional valve), Vx: a driving air control valve.

Claims (3)

(57) [Claims] 1. Two air cylinders (PR1, PL)
1) and the piston (2
The piston rods (27) fixed to 8) are respectively engaged with the handles (6f) protruding to the left and right of each filter plate (6), and the filter plates are moved with the movement of the pistons of the two air cylinders. The left and right filter plate conveyors (1
2), the plurality of filter plates are clamped to the fixed plate side by the movable plate (5), and the slurry to be filtered is filtered by the filter cloth (8) between the adjacent filter plates, while being clamped by the movable plate. The filter plate is opened by the filter plate transport device to remove the cake from between the adjacent filter plates, the filter is disposed in the air outlet line of the left and right air cylinder, respectively, the air passing through controlling the current The left and right flow control valves (VRA, VLA) for changing the flow rate of the air and the movement time of each piston of the left and right air cylinders between the same predetermined distances are measured to control the left and right flow control valves. An automatic tuning device for a filter plate transport device, comprising a control device (CT). 2. Two air cylinders (PR1, PL)
1) and the piston (2
The piston rods (27) fixed to 8) are respectively engaged with the handles (6f) protruding to the left and right of each filter plate (6), and the filter plates are moved with the movement of the pistons of the two air cylinders. The left and right filter plate conveyors (1
2), the plurality of filter plates are clamped to the fixed plate side by the movable plate (5), and the slurry to be filtered is filtered by the filter cloth (8) between the adjacent filter plates, while being clamped by the movable plate. The filter plate is opened by the filter plate transport device to remove the cake from between the adjacent filter plates, the filter is disposed in the air outlet line of the left and right air cylinder, respectively, the air passing through controlling the current Left and right flow control valves (VRA, VLA) for changing the flow rate of the air, and a measuring device (10) for measuring the moving time of each piston of the left and right air cylinders over the same predetermined distance.
0) and the difference (T1-T2) between the movement times of the respective pistons of the left and right air cylinders measured by the measuring instrument is determined, and it is determined whether or not the difference is within an allowable range (ΔT). Outside, the current flow setting current value (F) of the right flow control valve (VRA) when the time is measured by the measuring instrument
D) and the difference (| FD-FDS |) between the set center current value (FDS) of the right flow control valve (VRA) and the left flow control valve (VL) when time is measured by the measuring instrument.
A) The difference between the current flow setting current value (FD) of the present flow setting (FD) and the setting center current value (FDS) of the flow control valve (VLA) on the left side (| FD-FDS |) When the current value (FDS) is smaller than the current flow rate setting current value (FD), the correction current (a1) is subtracted from the current flow rate setting current value (FD), and the set center current value (FDS) is reduced. Current flow setting current value (FD)
If larger, the current flow setting current value (FD)
And a controller (CT) for controlling the left and right flow control valves with a new set current obtained by adding a correction current (a1) to the filter plate transport device. 3. The flow control valve (VRA, VL)
A) The automatic filter plate transport device according to claim 2, wherein, when the current is increased, the flow rate of the passing air increases, and when the current decreases, the flow rate of the passing air decreases. Tuning device.