JP4513687B2 - Method and apparatus for opening filter plate in filter press - Google Patents

Description

  The present invention relates to an improvement in a plate opening method and a plate opening apparatus in which a large number of parallel filter plates are sequentially opened by a reciprocating shifter.

  2. Description of the Related Art Conventionally, a sequential open plate type filter press is known in which a large number of parallel filter plates are opened one by one, or a plurality of filter plates are opened to peel cakes. A filter plate opening device for connecting a locking claw tool to two pairs of chains provided with electric motors capable of rotating in the forward and reverse directions and alternately opening the filter plate is also disclosed in Patent Document 1, for example. Well known. In addition, for example, Patent Document 2 discloses an apparatus in which two claw devices are incorporated in one carriage so that the filter plate can be fed in any direction before and after, and the filter plate is moved at the time of cake peeling and filter cloth washing. Known as described. Further, a filter plate multiple frame automatic frame opening device that incorporates a plurality of filter plate tension levers and interval adjustment stop levers into one carrier and opens a plurality of filter plates at a time is also described in, for example, Patent Document 3 As is known.

Japanese Utility Model Publication No. 57-42489 (claims for utility model registration, FIGS. 2 and 3) Utility Model Registration No. 2513779 (paragraph number 0016 and paragraph number 0018, FIGS. 2 and 3) Japanese Examined Patent Publication No. 7-87882 (Example, FIGS. 2 and 3)

  The conventional plate-opening type filter plate opening device that opens the plates one by one requires a long time for stripping the cake in a filter press having a large number of filter plates. As a countermeasure, the filter plate opening device that opens the filter plate alternately with two pairs of locking claws can shorten the plate opening time, but it requires two pairs of chains and an electric motor that can be rotated forward and backward. In addition, the cost of the plate-opening device increases, and a large installation space is also required. In addition, the conventional device that moves the filter plate at the time of cake peeling and filter cloth washing can separate the cake peeling and filter cloth washing to separate the residue and regenerate the filter cloth. There is a disadvantage that the miscellaneous time is further increased. The conventional filter press in which a frame opening device for a plurality of filter plates is installed in a single carrier shortens the plate opening time, but the cake is adhered between the front and rear filter plates. There is a risk that the filter plate will be accompanied or fallen, and the rear filter plate cannot be transferred successfully. In order to open a plurality of filter plates, the structure becomes complicated. The invention of this application is a sequential open plate type in which sliding cylinders are arranged in parallel double shifters, and the double shifters are operated by one reversible motor with a brake and a pair of traction chains to shorten the opening time. A method and apparatus for opening a filter plate for a filter press are provided.

The gist of the filter plate opening method according to the present invention is that a carrier disposed in a traction chain is provided with a pair of slidable shifters and a cylinder connected to the shifter in parallel to reduce the stroke of the cylinder operating rod. Set the length of the open plate interval plus the thickness of one filter plate, lock the brake of the reversible motor with brake linked to the traction chain, and attach one shifter to the closed top filter plate. Engage and retract the cylinder operating rod to transfer it to the open plate side, extend the other cylinder operating rod to transfer the shifter to the closing plate side, and complete the opening of the filter plate that is transferred by one shifter the detects release the reversible motor brake with brake, it is moved by the closing plate side one filter plate thickness of the carrier while contracting the operating rod of the inner cylinder further, the other cylinders Extends the Do杆engaging the shifter to the head filter plate which had been closing plate, to lock the reversible motor brake with brake again when the internal pressure of the inner cylinder is increased, the expansion and contraction of the actuating rod of the pair of cylinders This is a method of opening the filter plate by switching and sequentially opening the filter plate.

The plate opening device for carrying out the filter plate opening method according to the present invention is such that a traction chain is stretched between a pair of side rails in which a large number of filter plates are arranged in parallel, and the filter plates are sequentially moved by a carrier shifter disposed on the traction chain. In a plate opening device for a filter plate to be opened, a pair of slidable shifters and a cylinder connected to the shifter are arranged in parallel with the carrier, and the stroke of the cylinder's operating rod is added to the opening interval of the filter plates to add one filter plate thickness. The length of the pair of cylinders is alternately extended and retracted, and the reversible motor with brake linked to the traction chain and the reversible motor with brake are released by detecting the end of the filter plate opening. and limit switch means for, by detecting the increase inner pressure of the cylinder was also provided a pressure switch means for locking the reversible motor brake with brake It is.

  The arrangement of the cylinders of the filter plate opening device and the detection device are arranged such that the inner shifter and the outer shifter are arranged in parallel with the carrier on the closed plate side of the filter plate, and a pair of inner cylinder and outer cylinder are arranged on the open plate side. A limit switch or pressure switch that detects the end of the plate opening, and a pressure switch that detects the pressure when the internal pressure of the cylinder pipe rises due to contraction of the operating rods of the inner and outer cylinders. It is. The specific means of the filter plate opening device locks the brake of the reversible motor with brake, opens the filter plate with the inner shifter or the outer shifter, detects the completion of the filter plate opening, After releasing the brake and moving the carrier toward the front frame by the thickness of the filter plate, when the internal pressure of the inner cylinder or outer cylinder rises, the brake of the reversible motor with brake is locked and the inner cylinder and outer cylinder operate. The filter plate is opened by switching the expansion and contraction of the ridge.

The filter press opening method and the opening device of the filter press according to the present invention are configured as described above, and a sliding cylinder is arranged in a parallel double shifter, and one reversible motor with a brake and a pair of Since the double shifter is operated in the traction chain to shorten the plate opening time, the effect based on the method and configuration is
A. Since the double shifter of the inner shifter and the outer shifter is configured, the plate can be opened by one-way traveling of one shifter, and the traveling time of the filter plate can be shortened.
B. Since two sets of shifters placed on the carrier are driven by a cylinder disposed on the carrier, one set of chain linked to one reversible motor with a brake is sufficient, and the filter plate opening device is compact.
C. When the filter plate is opened, the chain does not reciprocate, so there is less chain consumption and less dust.
D. The force applied to the filter plate arm of the filter plate can be set to the minimum because the force of pushing and pulling the cylinder operating rod can be adjusted individually.
E. Since the cylinder acts as a cushion, the impact when contacting the filter plate can be reduced.
F. Cylinder speed can be easily changed by adjusting the flow rate of the medium to the cylinder.
There are effects such as.

  A filter plate opening method and filter plate opening device according to the present invention will be described in detail with reference to the drawings. First, FIG. 1 is a side view of a filter press according to the present invention, and includes front and rear front frames. A pair of side rails 3 and 3 are bridged between 1 and the rear frame 2, and a large number of filter plates 4 are supported on the side rails 3 and 3 so as to be freely opened and closed. A movable head 5 is disposed between the rear frame 2 and the filter plate 4, and the movable head 5 is connected to a tightening cylinder 6 disposed on the rear frame 2. A number of filter plates 4 that have been sequentially opened and the cake has been peeled off are actuated by operating the tightening cylinder 6 to move the movable head 5 toward the front frame 1 to close the filter plates 4. The filter plates 4 in parallel may be ones in which filter plates and diaphragm plates are alternately arranged in parallel. A driving sprocket 7 and a driven sprocket 8 are pivotally supported on the front and rear portions of the side rail 3, and an endless traction chain 9 is hung around. A chain guide 10 is disposed on the side rail 3, and a carrier 11 connected to both ends of the traction chain 9 is slidably supported.

FIG. 2 is a plan view of the filter press, in which a reversible motor 12 with a brake is supported on the front frame 1 and linked to a drive sprocket 7 around which a traction chain 9 is wound. The reversible motor 12 with a brake applies a brake while the filter plate 4 is opened to fix the carrier 11, and after the final filter plate 4 has been opened, releases the brake and returns the carrier 11 to its original position. The carrier 11 connected to the traction chain 9 is disposed below the filter plate arm 13 of the filter plate 4 supported on the side rail 3. 3 and 4 are side views of the inner shifter 14 or the outer shifter 15. The inner shifter 14 and the outer shifter 15 arranged in parallel with the carrier 11 have the same shape, and the inner shifter 14 and the outer shifter 15 are installed. A mounting base 17 provided with rolling wheels 16 is movably disposed on the carrier 11. A support rod 19 is horizontally mounted on a pair of mounts 18, 18 erected on the mount 17, and an open plate claw 20 is rotatably supported. A spring 23 is suspended from a pin 21 provided at the tip of the open plate claw 20 on the rear frame 2 side and a pin 22 provided on the front frame 1 side of the gantry 18, and the tip of the plate claw 20 is normally raised. The filter plate 4 is raised and brought into contact with the filter plate arm 13 of the filter plate 4.

  As shown in FIGS. 3 and 4, a push claw 24 provided to the open plate claw 20 is rotatably supported on a support rod 26 horizontally mounted on a pair of mounts 25, 25. A spring 29 is suspended from a pin 28 provided at the rear end portion of the push claw 24 on the rear frame 2 side and a pin 27 provided on the front frame 1 side of the mount 25, and the tip end portion of the push claw 24 is normally attached to the pin 27. The filter plate 4 is raised and prevented from falling down. Reference numerals 30, 31, and 32 are support pins that restrict the rotation of the opening claw 20 and the push claw 24.

FIG. 6 is a plan view of a filter plate opening device, in which an inner shifter 14 and an outer shifter 15 are arranged in parallel on the front frame 1 side of the carrier 11, and a pair of hydraulic or air cylinders are arranged on the rear frame 2 side of the carrier 11. The inner cylinder 33 and the outer cylinder 34 are arranged in parallel. FIG. 7 is a side view of the filter plate opening device, and the front ends of the operating rods 35 and 36 of the inner cylinder 33 and the outer cylinder 34 are located on the front frame 1 side of the mounting bases 17 and 17 of the inner shifter 14 and the outer shifter 15. It is connected. Since the cylinders 33 and 34 can individually adjust the pushing / pulling force of the operating rod, the force applied to the filter plate arm 13 of the filter plate 4 can be set to a minimum. Since the cylinder acts as a cushion, the impact when contacting the filter plate can be reduced. As shown in FIG. 1 and FIG. 2, the stroke of the operating rods 35 and 36 of the inner cylinder 33 and the outer cylinder 34 is added to the gap L between the front and rear filter plates 4 and 4 and the thickness B of one filter plate 4 is added. The length (L + B) is set, and the operating rods 35 and 36 of the pair of inner cylinder 33 and outer cylinder 34 are simultaneously expanded and contracted in opposite directions. The operating rods 35 and 36 of the inner cylinder 33 and the outer cylinder 34 are expanded and contracted to roll the rolling wheels 16 of the mounting bases 17 and 17 to the upper surface of the carrier 11, and the inner shifter 14 and the outer shifter 15 are moved to the filter plate 4. The distance of the length obtained by adding the thickness B of one filter plate 4 to the open plate interval L of 4 is moved back and forth. The cylinders 33 and 34 can easily change the cylinder speed by adjusting the flow rate of the medium to be supplied.

FIG. 8 is a front view of a filter plate on which odd-numbered plate-opening devices are arranged, and a notch 13a through which the inner shifter 14 can pass is provided in the odd-numbered filter plate arms 13 of the parallel filter plates 4. When moving to the front frame 1 side, Ru Citea to allow retraction while the back of the tip portion of Kaihan pawl 20 launched by a spring 23 of the inner shifter 14 is in sliding contact with the odd-numbered filter plate arm 13. Filtration plates were provided with even-numbered Kaihan apparatus, as shown in FIG. 2, to shorten the even-numbered filter plate arm 13, are as outer shifter 15 can pass. The operating rods 35 and 36 of the inner cylinder 33 and the outer cylinder 34 are alternately expanded and contracted, and the filter plate 4 is sandwiched between the open claw 20 and the push claw 24 of the inner shifter 14 and the outer shifter 15, so that the odd and even filter The plates 4 can be alternately transferred to the rear frame 2 side. The operating rods 35 and 36 of the pair of inner cylinder 33 and outer cylinder 34 are alternately extended to engage the open claw 20 and the push claw 24 of the inner shifter 14 and the outer shifter 15 with the filter plate arm 13 of the filter plate 4. The filter plates 4 are moved by alternately contracting the operating rods 35 and 36 of the inner cylinder 14 and the outer cylinder 15. Since the double shifter of the inner shifter and the outer shifter is configured, the plate can be opened by one-way traveling of one shifter, and the traveling time of the filter plate can be shortened. When the elongated operating rods 35 and 36 are contracted and the filter plate 4 is transferred to the rear frame 2 side, the wheels 16 of the mounting base 17 are rolled to the side of the inner cylinder 33 and the outer cylinder 34.

As shown in FIG. 6 , the limit switches are connected to the carrier 11 at the end of the trajectory in which the operating rods 35 and 36 of the inner cylinder 33 and the outer cylinder 34 are contracted to move the inner shifter 14 and the outer shifter 15 to the rear frame 2 side. LS is provided. When the filter plate 4 to be opened rearward comes into contact with the filter plate 4 opened in front, the end point of the plate opening is detected. The limit switch LS detects the end of the opening of the filter plate 4 and transmits an operation signal to the brake reversible motor 12 to release the brake. When the opening of the filter plate 4 is completed, the inner shifter 14 and the outer shifter 15 are regulated by the open plate filter plate, and the operating rods 35 and 36 of the inner cylinder 33 and the outer cylinder 34 are further contracted to move the carrier 11 by the thickness B of the filter plate 4. Move to the front frame 1 side. As shown in FIG. 6 , a pressure switch PS is disposed in the cylinder piping 37 of the inner cylinder 33 and the outer cylinder 34, and the contraction of the operating rods 35, 36 of the inner cylinder 33 and the outer cylinder 34 is completed, that is, a filter plate. A point in time when the carrier 11 is moved to the front frame 1 side by a thickness B of 4 is detected. When the inner cylinder 33 and the outer cylinder 34 stop moving, the pressure switch PS detects the increased internal pressure of the cylinder, and sends an operation signal to the reversible motor 12 with brake to lock the brake 11 and fix the carrier 11. It is.

  As shown in FIG. 1, a guide plate 38 is disposed on the side rail 3 in the vicinity of the front frame 1, and when it reaches the final filter plate 4, it is detected by a limit switch (not shown), and the inner cylinder 33 With the operating rods 35 and 36 of the outer cylinder 34 in the extended state, the pin 21 of the open plate claws 20 and 20 with the spring 23 suspended is slid on the guide plate 38 so that the tips of the open plate claws 20 and 20 are laid down. Then, the carrier 11 is moved to the opening start position of the filter plate by the reversible motor 12 with brake. A guide plate 39 is also provided on the side rail 3 near the rear frame 2, and the operating rods 35 and 36 of the inner cylinder 33 and the outer cylinder 34 are contracted, and the pin 21 of the opening claw 20 is attached to the guide plate 39. The tip of the plate claw 20 is erected by sliding. Since the two sets of shifters 14 and 15 mounted on the carrier 11 are driven by the cylinders 33 and 34 disposed on the carrier 11, the chain 9 linked to the one reversible motor 12 with a brake can be used as one set. The plate opening device 4 becomes compact. Further, since the chain 9 does not reciprocate when the filter plate 4 is opened, the chain 9 is less consumed and less dust is generated.

9a to 9h in FIG. 9 are explanatory views of the operation state of the inner shifter and the outer shifter, and the operation state will be described together with the flowchart of FIG. First, the traction chain 9 linked to the reversible motor 12 with brake is rotated, the carrier 11 is moved, and the inner shifter 14 and the outer shifter 15 are arranged at the opening start position of the filter plate 4. The opening of the filter plate 4 for discharging the cake of the filter press starts from the pulling operation of the tightening cylinder 6. As illustrated in FIGS. 9a to 9h,
1. (9a) The fastening cylinder 6 pulls the first filter plate 4 on the rear frame 2 side together with the movable head 5 to open the first chamber.
2. (9b) With the carrier 11 moving to the opening position of the plate, the operating rod 35 of the inner cylinder 33 is extended to put the inner shifter 14 in the pushed state. The opening claw 20 of the inner shifter 14 is passed under the second filter plate arm 13 while resisting the spring 23, and the push claw 24 is brought into contact with the filter plate arm 13 of the filter plate 4 to bring the inner shifter 14 into 2 The first filter plate arm 13 is locked. The outer cylinder 34 maintains the pulled state.
3. (9c) The inner cylinder 33 starts to travel at the same speed in the opposite directions to each other, while the inner cylinder 33 contracts the operating rod 35 and pulls it, and the outer cylinder 34 extends the operating rod 36 to the pushing side. The inner cylinder 33 moves the second filter plate 4 to the rear frame 2 side, while the outer cylinder 34 passes the outer side of the second filter plate arm 13 with the outer shifter 15 in a free state to the front frame. Move to 1 side.
4). (9d) The limit switch LS disposed on the inner shifter 14 or the pressure switch PS disposed on the cylinder pipe 37 brings the second filter plate 4 into contact with the opened first filter plate 4. At this point, the reversible motor 12 with brake releases the brake and becomes movable.
5). (9e), because the strokes of the operating rods 35 and 36 of the inner cylinder 33 and the outer cylinder 34 are set to a length (L + B) obtained by adding the thickness B of one filter plate 4 to the opening interval L of the filter plates. The operating rod 35 of the inner cylinder 33 continues to shrink by the thickness B of one filter plate 4. The inner cylinder 33 cannot move because the second filter plate is in contact with the first filter plate, and pushes the carrier 11 toward the front frame 1 side.
The outer shifter 15 that moves toward the front frame 1 resists the opening claw 20 against the spring 23 and passes below the third filter plate arm 13, and pushes the push claw 24 against the filter plate arm 13 of the filter plate 4. Then, the outer shifter 15 is locked to the third filter plate arm 13.
6). (9f) When the operating rods 35 and 36 of the inner cylinder 33 and the outer cylinder 34 stop moving, the cylinder internal pressure rises, and the pressure switch PS disposed in the cylinder pipe 37 is activated, and the reversible motor 12 with brake is detected by the detection. The brake works and fixes the carrier 11. The opening of the second chamber is completed, and the opening operation of the third chamber is started.
7). (9f), the outer cylinder 34 is pulled, and the inner cylinder 33 starts to push. The outer cylinder 34 contracts the operating rod 36 to move the third filter plate 4 to the rear frame 2 side. The inner cylinder 33 extends the operating rod 35, and the inner shifter 14 moves in a free state. The inner shifter 14 passes through the notch 13a of the third filter plate arm 13 and moves to the front frame 1 side.
8). (9g) The limit switch LS or the pressure switch PS is activated when the third filter plate 4 comes into contact with the second filter plate 4 being opened, and the reversible motor 12 with brake detects the brake by detecting this. It is released and becomes movable.
9. (9g) The operating rod 36 of the outer cylinder 34 continues to shrink by the thickness B of one filter plate 4, but the third filter plate 4 contacts the second filter plate 4 in the outer cylinder 34. Therefore, it cannot move and pushes the carrier 11 toward the front frame 1 side.
10. (9h) When the inner cylinder 33 and the outer cylinder 34 stop moving, the cylinder internal pressure increases. The pressure switch PS detects the increase in the internal pressure, ends the opening of the third chamber, and starts the opening operation of the fourth chamber. The reversible motor 12 with a brake works to fix the carrier 11.
11. The above operation is repeated until the final filter plate 4 is opened by the limit switch LS disposed in the carrier 11.
12 When the final filter plate 4 is reached, the operating rods 35 and 36 of the inner cylinder 33 and the outer cylinder 34 are extended, and the opening claw 20 is slid on the guide plate 38 on the front frame 1 side, and the tip of the opening claw 20 is reached. The carrier 11 is moved to the opening start position of the filter plate 4 by the reversible motor 12 with brake.
13. The operating rods 35 and 36 of the inner cylinder 33 and the outer cylinder 34 are contracted and slid on the guide plate 39 disposed on the rear frame 2 side so that the tip of the opening claw 20 is restored to the original state. End the plate opening process.

  The filter press plate opening method and plate opening apparatus of the filter press according to the present invention allows two sets of shifters arranged in parallel to the carrier to travel by a pair of cylinders, so that the filter plate can be opened by one-way travel of one shifter. Time can be shortened. One set of traction chains linked to one reversible motor with a brake is sufficient, and the filter plate opening device is compact. Accordingly, it becomes a sequential open plate type filter press suitable for production processes such as water and industrial sludge, chemical industry, and various industrial wastewater treatment.

It is a side view of the filter press concerning this invention. Similarly, it is a top view of a filter press. Similarly, it is a side view of an inner shifter and an outer shifter. Similarly, it is a top view of an inner shifter and an outer shifter. Similarly, it is a top view of the plate-opening apparatus of a filter plate. Similarly, it is a side view of a plate opening device for the filter plate. Similarly, it is a front view of an odd-numbered filter plate provided with a plate-opening device. Similarly, it is a front view of an even-numbered filter plate provided with an opening device. Similarly, 9a to 9h are explanatory diagrams of the operating states of the inner shifter and the outer shifter. Similarly, it is a flowchart of the operating condition of the plate opening device.

Explanation of symbols

1 Front frame 3 Side rail 4 Filter plate 9 Traction chain 11 Carrier 12 Reversible motor with brake 14 Inner shifter 15 Outer shifter 33 Inner cylinder 34 Outer cylinder 35 Actuator 36 Actuator 37 Cylinder piping B Filter plate thickness L Open plate interval L + B Stroke LS Limit switch PS Pressure switch

Claims (4)

A pair of slidable shifters (14, 15) and a cylinder (33, 34) connected to the shifters (14, 15) are arranged side by side on a carrier (11) disposed on the traction chain (9). , 34) is set to a length (L + B) obtained by adding the thickness of one filter plate (B) to the opening interval (L) of the filter plates, and to the traction chain (9). The brake of the interlocked reversible motor with brake (12) is locked, and one shifter (14) is engaged with the closed top filter plate (4), and the operating rod (35) of the inner cylinder (33) is engaged. ) Is contracted and transferred to the open plate side, and the operating rod (36) of the other cylinder (34) is extended to transfer the shifter (15) to the closed plate side, and also transferred by one shifter (14). Reversible with brake by detecting end of plate (4) Releasing the brake of Ta (12), it is moved by the closing plate side while contracting the operating rod of the inner cylinder (33) (35) further carrier (11) a single filter plate thickness (B), the other The operating rod (36) of the cylinder (34) is extended to engage the shifter (15) with the closed top filter plate (4), and when the internal pressure of the inner cylinder (33) rises, it is reversible with a brake. A filter press characterized by locking the brake of the motor (12), switching the expansion and contraction of the operating rods (35, 36) of the pair of cylinders (33, 34), and sequentially opening the filter plates (4 ...). Method of opening the filter plate in A traction chain (9) is stretched between a pair of side rails (3, 3) in which a large number of filter plates (4 ...) are arranged in parallel, and a shifter (14, 15) of a carrier (11) disposed on the traction chain (9). ) In order to open the filter plates (4...) Sequentially, a pair of slidable shifters (14, 15) and cylinders (33, 34) connected to the shifters (14, 15) are connected to the carrier (11). ), And the stroke (35, 36) of the cylinder (33, 34) is set to a length (L + B) obtained by adding one filter plate thickness (B) to the opening interval (L) of the filter plates. The reversing motor (12) with brake and the filter plate (4), which are set, and the operating rods (35, 36) of the pair of cylinders (33, 34) are alternately expanded and contracted and linked to the traction chain (9). Reversing motor with brake by detecting end of plate opening ( Wherein the limit switch means to release the brake 2) (LS), that it has provided a pressure switch (PS) of the means for locking the brake by detecting the rising internal pressure of the cylinder reversible motor with brake (12) A filter plate opening device in a filter press.   An inner shifter (14) and an outer shifter (15) are juxtaposed to the carrier (11) on the closed plate side of the filter plate, and a pair of inner cylinder (33) and outer cylinder (34) are arranged on the open plate side. A limit switch (LS) or pressure switch (PS) that detects the end of the opening of the filter plate (4) is provided, and the operating rods (35, 36) of the inner cylinder (33) and the outer cylinder (34) are contracted. 3. A filter plate opening device for a filter press according to claim 2, further comprising a pressure switch (PS) for detecting the pressure when the internal pressure of the cylinder pipe (37) rises. The brake of the reversible motor with brake (12) is locked, the filter plate (4) is opened with the inner shifter (14) or the outer shifter (15), and the completion of the filter plate (4) opening is detected and the brake is reversible. After releasing the brake of the motor (12) and moving the carrier (11) to the front frame (1) side by the filter plate thickness (B), the internal pressure of the inner cylinder (33) or the outer cylinder (34) increased. Occasionally, the brake of the reversible motor with brake (12) is locked, and the expansion and contraction of the operating rods (35, 36) of the inner cylinder (33) and the outer cylinder (34) is switched to open the filter plate (4 ...). The filter plate opening device in the filter press according to claim 3.