JP5950207B2 - Filter press - Google Patents

Description

  The present invention relates to a filter press having a mechanism that does not use oil for operation in consideration of the environment in a filter press that performs solid-liquid separation with a filter cloth suspended between filter plates.

Conventionally, a filter press has a plurality of filter plates supported in parallel on a pair of rails bridged between a front frame and a rear frame. The filter plate can be slidably moved on the rail. When the filter plate is closed, a filter chamber is formed, and solid-liquid separation can be performed. A hydraulic cylinder is used to open / close and tighten the filter plate.
Moreover, the filter cloth used for solid-liquid separation discharges dehydrated cake by running up and down. As a mechanism for running this filter cloth, a slide shaft is provided above a plurality of filter plate rows arranged in parallel so as to be openable and closable, and a bevel gear slide disposed at the top of the filter plate is fitted into the slide shaft so as to be movable only in the axial direction. Patent Document 1 discloses a filter press in which a filter cloth placed between filter plates is interlocked and connected to a bevel gear slide, and the filter cloth travels up and down by rotating a slide shaft.

  As the filter cloth suspension device, the upper edge of the pair of filter cloths is connected to one end of the drive chain, and the other end of the drive chain is a filter cloth core provided on one lower edge of the pair of filter cloths, And a filter press that connects a filter cloth core provided at the other lower edge of another adjacent filter cloth, and travels the filter cloth by traveling a drive chain by a drive wheel provided above the filter plate. Is described in Patent Document 2.

The applicant has so far worked on solving this problem, and as in Patent Document 3, supplying water to the filter plate sliding portion of the filter press improves lubrication and reduces the amount of oil used in the operation of the filter press. I have been considering the environment.

JP2011-251230 WO2011 / 048962 JP2012-183493

This filter cloth traveling type filter press has many moving parts and sliding parts as described above, and in order to prevent malfunction, it is necessary to inject lubricating oil etc. into them properly and always keep a smooth state. There is. This is required for all machines equipped with a drive mechanism regardless of the filter press. Especially in the filter press machine, the deposits adhere to the sliding parts due to the on-site atmosphere (treatment liquid, steam, gas, dust, etc.), and there is a risk of serious trouble in the operation of the equipment. Therefore, it was necessary to frequently lubricate.
In addition, oil using oil such as a hydraulic cylinder needs to be replaced regularly, and a large amount of waste oil is generated when the oil is replaced. Hereinafter, lubricating oil and oil are collectively referred to as oil.
Thus, oil is used in various places for the operation of the filter press. Therefore, it is necessary to pay close attention to oil contamination due to oil leakage and handling of oil under the Fire Service Act. Furthermore, a large amount of oil is used for the operation of the filter press, and waste oil is also generated. It was.

  The present invention provides a filter press that reviews all sliding parts that use oil, improves operational convenience, and further reduces environmental burden.

A large number of filter plates are juxtaposed on a pair of guide rails bridged between the front frame and the rear frame, and a pair of filter cloths are suspended between the filter plates. In a filter press equipped with an electric cylinder that is moved to an oil-free bearing, lubrication and other maintenance are not required by using oil-free bearings for all sliding parts.
The oil-free bearing sleeve is made of resin or oil-impregnated metal so that it slides smoothly. Further, the same effect can be obtained by coating the shaft sliding on the oil-free bearing with a fluororesin.

The sliding surface is kept smooth by supplying lubricating water to the sliding surface of the guide rail.
A slide shaft is provided above the filter plate row. A bevel gear slide arranged at the top of the filter plate is slidably fitted in the slide shaft only in the axial direction, and the filter cloth provided between the filter plates is linked to the bevel gear slide. By connecting and rotating the slide shaft so that the filter cloth travels up and down, the bevel gear slide can be moved smoothly together with the filter plate by making the bevel gear slide an oil-free bearing.
The filter cloth is suspended by a sprocket that rotates in conjunction with a bevel gear slide, and a drive chain that is wound around the sprocket and travels by the rotation of the sprocket, and the sliding part of the connecting pin of the drive chain is an oil-free bearing. The drive chain can be used without lubrication.

Moreover, you may provide the filter cloth washing | cleaning apparatus which moves up and down with an air cylinder above the said filter plate.
By connecting the movable head to an endless transfer chain wound around the driving sprocket and driven sprocket of the front frame and rear frame, connecting the movable head and the filter plate with a connecting link, and driving the transfer chain with a driving machine. The filter plate can be opened and closed faster than the electric cylinder by opening and closing the filter plate and externally fitting the sliding portion of the connecting pin with an oil-free bearing.
The lubricating water supplied on the guide rail connects the guide rail and the lubricating water tank, maintains the level of the lubricating water stored in the lubricating water tank above the sliding surface of the guide rail, and depends on the water pressure of the lubricating water tank. Supply lubricating water to the sliding surface of the guide rail.
The traction chain is hung on the chain guide standing on the guide rail, the carrier holding the filter plate with the opening claw and the push claw is connected to the traction chain, and the traction chain is driven by interlocking connection with the driving machine, The traction chain can be used without oil by fitting the sliding portion of the connecting pin with an oil-free bearing.
The lubricating water supplied on the guide rail may be supplied by being jetted from a nozzle provided on the carrier.

The filter press according to the present invention is configured by a mechanism that does not require oil everywhere in the drive unit and the sliding unit, and can be operated without using oil. No oil pouring work is required at the drive and sliding parts, and daily maintenance work is greatly reduced. Since the work time at the site is shortened, even if the filter press is operated in an on-site atmosphere that adversely affects the operator, such as a sludge treatment plant containing radioactive substances, the operator is not burdened. Furthermore, it is not necessary for the operator to be resident on the site, and if the filter press is operated remotely, a completely unmanned operation can be performed.

In addition, since the filter press according to the present invention uses an electric cylinder for opening and closing the filter plate, it is necessary to consider oil contamination due to oil leakage and regulations in the Fire Service Act that had to be taken into consideration when using a hydraulic cylinder. Absent. Moreover, since no oil change is required, a large amount of waste oil that has been generated up to now can be eliminated, and the environmental load can be reduced. Since no hydraulic pump is used, noise can be reduced.

It is a side view of the filter press concerning this invention. Similarly, it is a principal part side view of the electric cylinder of a filter press. Similarly, it is a front view of a filter plate of a filter press. Similarly, it is a perspective view of a pair of filter cloths suspended between filter plates of a filter press. Similarly, it is a principal part side view of the filter cloth hanging apparatus of a filter press. Similarly, it is a principal part side view of a drive chain lower end. Similarly, it is the schematic of the filter cloth drive device hung between filter plates. Similarly, it is the top view which notched a part of drive chain. Similarly, it is a principal part perspective sectional view of the guide rail of a filter press. Similarly, it is sectional drawing of the slide plate arrange | positioned at the guide rail. Similarly, it is the schematic of the lubrication apparatus of a filter press. Similarly, it is a side view of a filter press having a filter plate opening and closing plate device. It is a side view of the filter press concerning other examples. Similarly, it is a top view of the filter press which concerns on another Example. Similarly, it is a side view of the plate opening apparatus which concerns on another Example. Similarly, it is a top view of the plate opening apparatus which concerns on another Example. Similarly, it is a principal part front view of the lubricating device which concerns on another Example. Similarly, it is a front view of the filter cloth washing | cleaning apparatus which concerns on another Example.

The filter press according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of the filter press according to the present invention. The filter press 1 is mounted on a guide rail 4 bridged by a front frame 2 and a rear frame 3. A plurality of filter plates 5 that can move in the front-rear direction while being slidably mounted, and filter cloths 6 suspended so as to cover the filtration floor surfaces of these filter plates 5 A filtration chamber is formed.
A slide shaft 7 is provided above the filter plate row 5... Along the filter plate row 5..., And a bevel gear slide 8 on which the filter cloth 6 is suspended is axially attached to the slide shaft 7. It is slidably inserted in. On the rear frame 3, a drive unit 9 for rotating the slide shaft 7 is placed.
An electric cylinder 10 is supported on the rear frame 3, and the filter plate 5 is closed by extending the electric cylinder 10 and pressing the movable head 11 in the direction of the front frame 2. If the stock solution is supplied to the filtration chamber between the closed filter plates 5, the filtrate passes through the filter cloth 6 and is discharged to the outside. The solid matter captured by the filter cloth 6 is dehydrated while forming a cake layer.
After dehydration is completed, the electric cylinder 10 is contracted to open the filter plate 5. The filter plates 5 can be simultaneously opened at a predetermined interval determined by the connecting link 12. And the drive machine 9 is operated and dewatering cake is discharged | emitted while making the filter cloth 6 descend | fall.

FIG. 2 is a side view of the main part of the electric cylinder of the filter press. The electric cylinder 10 moves the movable head 11. A movable head 11 is slidably arranged in parallel at the end of the filter plate row 5. And the filter plate row 5 ... and the movable head 11 are loosely connected by the connecting link 12, and when the movable head 11 at the end is moved in the plate opening direction, the filter plate row 5 ... is opened sequentially. Thus, a predetermined interval is provided between the filter plates 5. On the back surface of the movable head 11, a base end portion of a screw screw 13 with a screw engraved on the distal end side is rotatably attached to the shaft, and the screw screw 13 is extended and screwed so as to penetrate the rear frame 3. It is. An electric motor 14 that rotates a screwed screw 13 is placed on the rear frame 3.

When the electric motor 14 is operated, the screw screw 13 rotates to change the distance between the front frame 2 and the movable head 11. When the electric motor 14 mounted on the rear frame 3 is driven, the rotation is transmitted to the screw screw 13, and the rear frame 3 to which the screw screw 13 is screwed prevents the movable head 11 from moving backward. The movable head 11 is moved to the filter plate row 5... By the rotation of the screw screw 13, and the filter plate row 5.

FIG. 3 is a front view of the filter plate of the filter press, and filter plate arms 15 and 15 are projected from the side surface of the filter plate 5, and each filter plate arm 15 is slidably mounted on the guide rail 4. ing. A liner 16 and a slide plate 17 are disposed on the sliding portions of the filter plate arm 15 and the guide rail 4, respectively.
A pair of filter plate brackets 18, 18 are provided upright on both shoulders of the filter plate 5, and a filter cloth drive shaft 19 bridged by this is provided. One end of the filter cloth drive shaft 19 is connected to an input bevel gear 20 that rotates in mesh with the bevel gear slide 8 fitted in the slide shaft 7. A pair of sprockets 22, 22 that hangs a drive chain 21 for suspending the filter cloth 6 are fitted to both ends of the filter cloth drive shaft 19. The sprocket 22 rotates simultaneously with the rotation of the filter cloth drive shaft 19.

FIG. 4 is a perspective view of a pair of filter cloths suspended between the filter plates of the filter press. The pair of filter cloths 6 and 6 are suspended between the filter plates 5. The upper edge portions of the pair of filter cloths 6 and 6 are bonded together to form a bag portion. Bag section, top of filter cloth metal core 23 is inserted. A bag portion is formed at each of the lower edge portions of the pair of filter cloths 6 and 6 to which the upper edge portions are joined. A lower filter cloth core 24 is inserted through the bag portion. Further, a mud supply hole 25 is opened at the upper part of the filter cloth 6, and a liquid supply plate 26 having an opening communicating with the mud supply hole 25 is provided at the upper part of the pair of filter cloths 6, 6. It has been. The stock solution is supplied between the filter cloth 6 suspended between the filter plates 5 through the mud supply holes 25 of the filter cloth 6 and the openings of the liquid supply plate 26.

FIG. 5 is a side view of the main part of the filter cloth hanging device of the filter press. A pair of drive chains 21 and 21 are connected to both ends of the upper filter cloth mandrel 23 inserted through the upper edge of the filter cloth 6. A pair of filter plate brackets 18 and 18 are erected on the shoulder portion of the filter plate 5, and a filter cloth drive shaft 19 is bridged on the filter plate bracket 18, and sprockets 22 and 22 are provided at both ends of the filter cloth drive shaft 19. It is fitted. The drive chain 21 is wound around the sprocket 22, and can be rotated forward and backward in accordance with the rotation of the filter cloth drive shaft 19. The drive chain 21 with the filter cloth 6 suspended can be driven. An input bevel gear 20 is fitted into one end of the filter cloth drive shaft 19 and meshes with the bevel gear slide 8 fitted into the slide shaft 7.

  FIG. 6 is a side view of the main part of the lower end of the drive chain. A suspension device for the filter cloth 6 for locking the lower filter cloth cored bar 24 of the filter cloth 6 is provided at the lower end of the drive chain 21. A turnbuckle 27 is connected to the lower end of the drive chain 21, and one of a pair of Tightener bolts 29, 29 provided with a joint link 28 is screwed into the turnbuckle 27. A hanging metal fitting 30 for hanging the lower filter cloth mandrel 24 of the filter cloth 6 is fixed to the Tightener bolt 29 by a pair of nuts 31 and 31 which are screwed apart from the Tightener bolt 29 and coupled to the drive chain 21. ing.

  As shown in FIG. 5, lower end portions of the filter cloth 6 before and after the filter plate 5 are respectively wound around rollers 32 below the filter plate 5, and lower filter cloth cores 24 provided at the lower end portions of the front and rear filter cloths 6 are attached. The pair of filter cloths 6 and 6 are suspended between the filter plates 5 so as to be movable up and down by being connected to a hanging metal fitting 30 connected to the lower end of the drive chain 21.

  FIG. 7 is a schematic view of a filter cloth driving device suspended between filter plates. A slide shaft 7 is rotatably supported from the front frame 2 to the rear frame 3 on a frame bracket 33 erected on both shoulders of the front frame 2 and the rear frame 3. A bevel gear slide 8 is fitted in the slide shaft 7, and the bevel gear slide 8 is connected to a filter cloth drive shaft 19 that is bridged by a filter plate bracket 18 that is erected on both shoulders of the filter plate 5. Move on the slide shaft 7 together with the movement of. The bevel gear slide 8 meshes with and is connected to an input bevel gear 20 fitted on the filter cloth drive shaft 19.

  When the slide shaft 7 is rotated by the drive unit 9 placed on the rear frame 3, the bevel gear slide 8 rotates in conjunction with the input bevel gear 20 meshed with the bevel gear slide 8. At the same time, the filter cloth drive shaft 19 rotates, and the sprocket 22 fitted in the filter cloth drive shaft 19 rotates. When the drive chain 21 wound around the sprocket 22 moves in accordance with the rotation of the sprocket 22, the filter cloth 6 can run up and down.

  The bevel gear slide 8 moves slidably on the slide shaft 7 as the filter plate 5 opens and closes. The slide shaft 7 is coated with a fluororesin, and the bevel gear slide 8 is made of a resin or a resin-impregnated metal on the sliding surface with the slide shaft 7, so that the oil can be slid even when no oil is applied. Sliding on the moving surface is good, and problems such as seizure and galling do not occur. Therefore, the filter cloth driving device 34 can be operated without using oil, and maintenance such as refueling is unnecessary.

FIG. 8 is a plan view in which a part of the drive chain is cut away. The inner plate 35 of the drive chain 21 is formed in a gourd shape with stainless steel or the like, and bush holes 36 are formed at both ends. Then, both ends of a bush 37, which is also formed of stainless steel or the like, are press-fitted into the bush holes 36 of the pair of opposed inner plates 35, 35 and fixed. Further, a connecting pin 38 made of stainless steel or the like is inserted into the inner hole of the bush 37, and both ends of the connecting pin 38 are press-fitted into the pin hole 40 of the outer plate 39 positioned outside the inner plate 35. Is fixed. That is, a large number of inner links constituted by a pair of inner plates 35, 35 and two bushes 37, 37 are connected endlessly by the outer plate 39 via the connecting pins 38.

In the conventional chain, the clearance between the pin and the bush is very small, and the pin slides with the bush during operation. However, in the drive chain 21 used in the present invention, there is a gap between the connecting pin 38 and the bush 37. There is a cylindrical sleeve 42 formed of resin or oil-impregnated metal in the gap. Therefore, the connecting pin 38 does not slide with the bush 37 but slides with the sleeve 42. This sleeve 42 is extremely excellent in wear resistance and has a small coefficient of friction, so that it is used without lubrication. Even when used for a long time, the amount of wear between the connecting pin 38 and the sleeve 42 is very small. It is natural that oil fine particles do not scatter, and wear powder fine particles hardly scatter.

FIG. 9 is a perspective cross-sectional view of the main part of the guide rail of the filter press, in which the slide plate 17 is fitted in the concave groove 43 formed in the upper end surface of the guide rail 4. A groove 44 is formed at the lower edge of the slide plate 17 and communicates with the sliding surface of the upper edge of the slide plate 17 through a plurality of lubricating holes 45. Further, the groove portion 44 communicates with the lubricating water channel 46, and the lubricating water supplied from the lubricating water channel 46 stays in the groove portion 44 and is supplied to the sliding surface all at once through the lubricating holes 45 as the water level rises. It has become.

FIG. 10 is a cross-sectional view of the slide plate disposed on the guide rail. The slide plate 17 is fitted in the groove 43 of the guide rail 4 with the surface of the slide plate 17 forming the groove 44 facing down. The groove 44 of the slide plate 17 communicates with the lubricating water channel 46. The sliding surface of the upper edge of the slide plate 17 slides with the liner 16 disposed on the filter plate 5 when the filter plate 5 moves as the opening / closing plate. In order to supply lubricating water as a frictional resistance reducing agent to the sliding surface, a plurality of lubricating holes 45 are provided. The number or the diameter of the lubrication holes 45 can be appropriately selected depending on conditions such as the number of filter plates 5 and the opening plate pitch.

FIG. 11 is a schematic view of a lubrication device for a filter press. Lubricating water is supplied to a lubricating water tank 49 through a supply pipe 48 from a water supply device 47 connected to a water source (not shown) such as a water pipe. The lubricating water tank 49 is attached to the guide rail 4 and includes a water level detection device 50 for measuring the water level in the tank. The set value of the water level detection device 50 is set above the height of the sliding surface of the slide plate 17. In conjunction with a detection device that detects the start and end of the opening / closing plate of the filter plate 5, the control device 51 controls the water level in the lubricating water tank 49 so that it is always maintained above the sliding surface when the filter plate 5 is moved. Yes.

A lubricating water channel 46 is connected to the lubricating water tank 49, and the lubricating water in the lubricating water tank 49 is supplied to the sliding surface of the slide plate 17 by the water pressure of the stored water via the groove 44 and the lubricating hole 45 of the slide plate 17. . Further, a discharge pipe 52 is connected to the lubricating water tank 49. By opening a valve discharged to the discharge pipe 52, the lubricating water stored in the lubricating water tank 49 can be discharged and the water level can be lowered. . Further, valves are provided in the supply pipe 48 and the lubricating water channel 46, respectively, and the amount of lubricating water supplied to the sliding surface of the slide plate 17 can be adjusted.

The supply amount of lubricating water supplied from the lubricating hole 45 is dependent on the level of the lubricating water tank 4 9, the set value of the water level sensing apparatus 50 by slightly with above the sliding surface, all coming leaking Lubricating water can be supplied to the sliding surface. When the water level of the lubricating water tank 49 is high, the lubricating water is ejected from the lubricating holes 45 due to the high water pressure and scattered around.

The lubrication device 53 of the filter press 1 of the present invention is configured as described above and does not use oil for lubrication. Since the lubricating water is supplied to the sliding surface only when the filter plate 5 is in operation, the minimum amount of lubricating water is sufficient. Moreover, since the lubricant is water, the oil and fat is not scattered to the outside, and the environmental load can be reduced. Easy handling during disassembly and maintenance.

FIG. 12 is a side view of a filter press having a filter plate opening / closing plate device. The filter press of the present invention may connect the drive unit 9 and the movable head 11 with a transfer chain 54, and the transfer chain is rotated by the rotation of the drive unit 9. If the filter press 1 is configured to transfer the movable head 11 at 54, the opening / closing plate of the filter plate 5 can be made faster than the movable head 11 is moved by the electric cylinder 10. At this time, the electric cylinder 10 is used for fastening after the filter plate 5 is closed. Since the transfer chain 54 used at this time is the same as the drive chain 21 used in the traveling of the filter cloth 6 , it is not necessary to supply oil and maintenance is not required.

FIG. 13 is a side view of a filter press according to another embodiment. The filter plates 5 are opened one by one by the opening device 61, and the filter cloth 6 is fixed. A driving sprocket 55 and a driven sprocket 56 are pivotally supported on the front and rear portions of the guide rail 4, and an endless traction chain 57 is hung around. A chain guide 58 is disposed on the guide rail 4, and a carrier 59 connected to both ends of the traction chain 57 is slidably supported. The drive sprocket 55 is interlocked with the drive machine 9.

FIG. 14 is a plan view of a filter press according to another embodiment, in which a reversible motor 60 with a brake is supported on the front frame 2 and interlocked with a drive sprocket 55 around which a traction chain 57 is wound. The reversible motor 60 with a brake applies a brake while opening the filter plate 5 to fix the carrier 59, and after the final filter plate 5 has been opened, releases the brake and returns the carrier 59 to its original position. The carrier 59 connected to the traction chain 57 is disposed below the filter plate arm 15 of the filter plate 5 supported on the guide rail 4.

15 and 16 are a side view and a plan view of a plate-opening device according to another embodiment, in which a carrier 59 provided with a wheel is movably disposed on a chain guide 58. FIG. A mounting base 63 constituting the plate opening device 61 is detachably disposed on the carrier 59. A support rod 65 is horizontally mounted on a pair of mounts 64, 64 erected on the mounting base 63, and an open plate claw 66 is rotatably supported. A spring 69 is suspended from a pin 67 provided on the front frame 2 side of the open plate claw 66 and a pin 68 provided on the front frame 2 side of the mount 64, and the front end of the open plate claw 66 stands up normally. The filter plate is raised and brought into contact with the filter plate arm 15 of the filter plate 5.

On the other hand, a push claw 70 provided on the open plate claw 66 is rotatably supported on a support rod 72 horizontally mounted on a pair of mounts 71, 71. A spring 75 is suspended from a pin 73 provided at the rear end portion of the push claw 70 on the rear frame 3 side and a pin 74 provided on the front frame 2 side of the gantry 71. The filter plate 5 is raised and prevented from falling over. That is, the filter plate arm 15 of the filter plate 5 is sandwiched between the plate claw 66 and the push claw 70 of the plate opening device 61 so that it can be transferred to the rear frame 3 side.
Since the traction chain 57 connected to the carrier 59 is the same chain as the drive chain 21 that drives the filter cloth 6, it is not necessary to supply oil and maintenance is not required.

FIG. 17 is a front view of an essential part of a lubrication apparatus according to another embodiment. The carrier 59 is placed on a chain guide 58 disposed on the guide rail 4, and a cover 77 is erected outside the carrier 59. Above the cover 77, a nozzle 78 for supplying lubricating water to the slide plate 17 of the guide rail 4 is disposed, and is connected to the lubricating water pipe 79 through the cover 77. The lubricating water pipe 79 is flexible and can follow the movement of the carrier 59. Further, the cover 77 and the nozzle 78 are disposed at positions where they do not come into contact with the filter plate arm 15 or the like even when the carrier 59 moves.

The lubricating water pipe 79 communicates with a water source such as a water pipe via a pressure generator, and a valve is disposed between the pressure generator and the nozzle 78. The sliding portion lubricated with water may be made of a material that is unlikely to generate rust, and the peripheral parts may be formed with a film such as a rust inhibitor.

Further, in the filter press 1 that does not run the filter cloth 6 according to another embodiment, the filter plate 5 is opened to peel the cake, and the washing water is ejected from the filter cloth cleaning device 80 disposed on the upper part of the filter plate 5. Wash the filter cloth. The filter cloth 6 is suspended from both sides of the filter plate 5 from above, and when the filter plate 5 is opened, the front and back filter cloths 6 covering the cake are separated by moving together with the filter plate 5. Washing by the filter cloth washing device 80 is performed between the separated filter cloths 6.

FIG. 18 is a front view of a filter cloth cleaning apparatus according to another embodiment.
The filter cloth cleaning device 80 is disposed on a gate-type girder 81 spanned between a pair of guide rails 4, 4. The pantograph 82 is extendable downward, and an air cylinder is used to drive the pantograph 82 to extend and contract. 83, a nozzle pipe 84 supported horizontally by the lower part of the pantograph 82, and a supply pipe (not shown) for supplying cleaning water to the nozzle pipe 84.

The gate-type girder 81 can move freely along the guide rail 4 and moves between the filter plates 5 opened in the cake discharging process. After discharging the cake, the filter cloth cleaning device 80 ejects cleaning water from the nozzle tube 84 and contracts the air cylinder 83 to extend the pantograph 82 and lower the nozzle tube 84. The nozzle tube 84 is lowered while the washing water is jetted toward the filter cloth 6 to remove the cake that has failed to peel off from the surface of the filter cloth 6 and the filter cloth is washed. After completion of the cleaning, the air cylinder 83 is extended, the nozzle tube 84 is raised by the pantograph 82, and the process proceeds to the opening process of the filter plate 5.

The cylinder used for expansion and contraction of the pantograph 82 uses the air cylinder 83, so that the filter cloth can be washed without using oil. Incidentally, if a configuration that can swing up and down, lifting the nozzle tube 84 is not limited to pantograph 82.

In addition, sliding parts such as various bearings are made of a resin such as a thermosetting resin or a thermoplastic resin, or an oil impregnated metal. These bearings can be used without lubrication and do not require maintenance such as regular oil injection. Moreover, the drive machine 9 used for moving the transfer chain 54, the traction chain 57, the filter cloth cleaning device 80, and the slide shaft 7 can be driven without using oil if an electric motor or the like is used.

The filter press is provided with an operation panel for controlling the drive system of the filter press 1. The operation panel controls the forward / reverse drive of the filter cloth drive device 34 and an electric motor for moving the movable head 11 backward or backward. Devices for controlling the cylinder 10, controlling the lubrication device 53 of the sliding portion of the filter plate 5, controlling the filter cloth cleaning device 80, and the like are provided. Further, the operation panel is provided with a receiver for receiving a command signal from the outside so that remote control is possible. The operator can operate from a place away from the filter press 1 by using a transmitter that transmits a command signal. This remote operation of the filter press 1 is possible for the first time because no oil is used for each operation because no oil is used in the configuration of the filter press 1 as described above. That is.

In the filter press of the present invention, all sliding portions that move during operation are provided with lubrication measures, and maintenance such as lubrication that was originally required for each operation of the filter press is no longer necessary. Since the work time at the site is shortened, the operator's risk can be greatly reduced in an on-site atmosphere that places a burden on the operator, such as a sludge treatment plant containing radioactive substances. Therefore, solid-liquid separation in the filter press is possible even in places where it has been difficult to operate the filter press until now.

DESCRIPTION OF SYMBOLS 1 Filter press 2 Front frame 3 Rear frame 4 Guide rail 5 Filter board 6 Filter cloth 7 Slide shaft 8 Bevel gear slide 9 Drive machine 10 Electric cylinder 11 Movable head 12 Connection link 14 Motor 21 Drive chain 22 Sprocket 38 Connection pin 49 Lubricating water tank 54 transfer chain 55 drive sprocket 56 driven sprocket 57 traction chain 58 chain guide 59 carrier 66 open plate claw 70 push claw 78 nozzle 79 lubricating water pipe 80 filter cloth cleaning device 83 air cylinder

Claims (2)

A large number of filter plates (5...) Are arranged in parallel on a pair of guide rails (4, 4) bridged between the front frame (2) and the rear frame (3), and a pair of filter cloths ( 6, 6) A filter press provided with an electric cylinder (10) that suspends the movable head (11) provided at one end of the filter plate row (5 ...) and moves it in the opening and closing direction of the filter plate (5). In (1),
A slide shaft (7) provided above the filter plate row (5 ...);
A bevel gear slide (8) using an oil-free bearing which is arranged on the upper part of the filter plate (5), is fitted in the slide shaft (7) and is movable only in the axial direction;
A filter cloth (6) provided between the filter plates (5) which is moved up and down by rotating the slide shaft (7);
Sprockets (22, 22) rotating in conjunction with the bevel gear slide (8);
A drive chain (21) that hangs the filter cloth (6) and wraps around the sprocket (22) and travels by rotation of the sprocket (22);
A sleeve (42) using an oil-free bearing fitted on the connecting pin (38) of the drive chain (21);
An endless transfer chain (54) hung around the drive sprocket (55) and the driven sprocket (56) of the front frame (2) and the rear frame (3) and connected to the movable head (11);
A connecting link (12) for connecting the movable head (11) and the filter plate (5 ...);
A drive (9) for driving the transfer chain (54) to open and close the filter plate (5);
A sleeve (42) using an oil-free bearing that fits around the connecting pin (38) of the transfer chain (54);
A lubricating water tank (49) provided with lubricating water maintaining the water level above the sliding surface of the guide rail (4) and connected to the guide rail (4);
An operation panel for controlling the drive system of the filter press (1);
A receiver for receiving an external command signal provided on the operation panel;
A transmitter for transmitting a command signal from a remote location to a receiver; and a filter press. A large number of filter plates (5...) Are arranged in parallel on a pair of guide rails (4, 4) bridged between the front frame (2) and the rear frame (3), and a pair of filter cloths ( 6, 6) A filter press provided with an electric cylinder (10) that suspends the movable head (11) provided at one end of the filter plate row (5 ...) and moves it in the opening and closing direction of the filter plate (5). In (1),
A filter cloth cleaning device (80) that moves up and down by an air cylinder (83) above the filter plate (5...),
A traction chain (57) that hangs around a chain guide (58) erected on the guide rail (4) and externally fits the sliding portion of the connecting pin (38) with an oil-free bearing;
A carrier (59) having an open claw (66) and a push claw (70) for holding the filter plate (5), and connected to the traction chain (57);
A drive (9) interlockingly connected to the traction chain (57);
A nozzle (78) provided on the carrier (59) and for injecting lubricating water onto the guide rail (4);
An operation panel for controlling the drive system of the filter press (1);
A receiver for receiving an external command signal provided on the operation panel;
A transmitter for transmitting a command signal from a remote location to a receiver; and a filter press.

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