JP4954182B2 - Screw type filter dehydrator - Google Patents

Description

  In the present invention, for example, a suspension containing suspended fine particles generated in a relatively small-scale sewage treatment operation typified by an oxidation ditch method is suspended from filtrate in a low concentration state without passing through a concentration step. The present invention relates to a screw type filter dehydrator for separating into turbid fine particles.

  The conventional screw-type filter dehydrator comprises a filter cylinder consisting of an alternating superposed arrangement of a large number of annular fixed plates and a large number of annular movable plates, each with a small filtration gap, and penetrates the entire length of the filter cylinder. The screw outer diameter is set smaller than the annular fixed and movable plate inner diameter in a non-contact manner so that the outer periphery of the screw is not in contact with the annular fixed and movable plate inner periphery, and is positioned in the latter half of the filter cylinder. In the first screw mechanism in which a second screw blade is added between the pitches of the screw, the first drive mechanism for rotationally driving the screw and the movable plate are moved at different speeds in the first half and the second half of the filtration cylinder at the first half. The fulcrum bar 21 is loosely fitted in the upper hole 20a drilled in the upper part of each movable plate, and the front half part and the latter half part of the filter cylinder are individually fitted. The cam keys 16 projecting from the rotary shafts 14a and 14b are fitted into the lower holes 20b drilled in the lower portions of the respective movable plates, and the cam keys 16 projecting from the rotary shafts 14a and 14b are fitted. Each movable plate is driven to swing by eccentric rotation, and a second drive mechanism that swings the movable plate in the first half of the filter cylinder and a third drive mechanism that swings the movable plate in the latter half of the filter cylinder are provided individually. A screw type filter dehydrator configured as described above (for example, see Patent Document 1) is known.

  As another known example, as described above, a plurality of fixed rings (corresponding to the annular fixed plate) and a plurality of idle rings (corresponding to the annular movable plate) are alternately overlapped with minute filtration gaps. The screw conveyor which comprises the cylindrical body (corresponding to the said filtration cylinder) which consists of an arrangement | sequence, and is equipped with by a cylindrical body is upstream (equivalent to the said front half part) and downstream (equivalent to the said latter half part) of this cylindrical body. The inner diameter of each idle ring is set smaller than the outer diameter of the screw conveyor so that each idle ring moves relative to the fixed ring by the rotation of the screw conveyor. Also known is a screw-type filter dehydrator configured to rotate the first conveyor on the side at a higher speed than the second conveyor on the downstream side (see, for example, Patent Document 2).

  However, in the movable plate in which the first half and the second half of the filtration cylinder are driven to be eccentrically moved in the same manner, the amount of oscillation eccentricity of the movable plates of the first half and the second half of the filtration cylinder is substantially the same. In the configuration described in Document 1 or 2, in the first half of the filtration cylinder that receives and processes raw water having a high water content and fluidity, a large amount of liquid can be quickly filtered without excessively squeezing the object to be dehydrated. In order to flow out of the filter cylinder from the gap, the swinging eccentric speed of the movable plate must be increased in the first half of the latter half of the filter cylinder to effectively regenerate the filter gap to prevent clogging. Since each movable plate is orbitally moved in the narrow eccentric range of the cam key 16 by the support rod 21 and the rotating shafts 14a and 14b engaged in the upper hole 20a and the lower hole 20b, the filtering gap is substantially the same fixed plate. Japanese Patent Application Laid-Open Publication No. 2003-258867 is constrained by the combination of opposing surface positions of the movable plate, and the fixed plate surface and the movable plate surface of the filtration gap cannot be worn uniformly and are likely to cause local wear. Compared with the configuration of FIG. 4, the idle ring 30 is largely eccentric and rotationally displaced in accordance with the sliding contact positions on the outer peripheral edge of the screw conveyor 31 as shown in FIG. 4 of Patent Document 2, and the inner peripheral edge of each idle ring 30 is fixed. By entering and exiting the inner peripheral hole of the ring 6, the cleaning regeneration function of scraping off the sludge adhering to the plate surface of each fixed ring 6 and each floating ring 30, the fine gap g for draining the filtrate Since clogging is effectively prevented, the configuration of Patent Document 2 is extremely suitable for the first half of the filter cylinder.

  However, in Patent Document 2, a large amount of liquid is discharged from the filtration gap to the outside of the filtration cylinder in the first half of the filtration cylinder, and the latter part of the filtration cylinder to which the dehydration object having a low moisture content and a high viscosity and concentration is conveyed. In this case, since the eccentric displacement of the floating ring 30 is large, the object to be dehydrated transferred by the turning propulsion force of the screw conveyor 31 greatly enters and exits the inner peripheral hole of the fixed ring 6 and is inward from the inner peripheral edge of the fixed ring 6. Prior to the final main dehydrating action by the drag of the regulating member 40 (part corresponding to the discharge pressure adjusting valve) in the vicinity of the outlet opening 35 so as to reduce the width of the bag by being sequentially pressed against the back end surface of each protruding floating ring 30. When the auxiliary dehydrating action is combined with the main dehydrating action due to the drag force of the restricting member 40 that receives the turning propulsion force of the screw conveyor 31, the swinging eccentric amount of the movable plate is small. Compared with the configuration of Patent Document 1 in which the auxiliary dehydrating action does not work, the dehydrating object is strongly squeezed into a compacted dehydrated substance. Since the large eccentric force acts to suppress the rocking eccentric drive, the amount of dewatered material entering into the minute gap g gradually increases as the reproduction function of the minute gap g decreases, and the screw is accompanied accordingly. Inversely proportional to the increase in the driving load of the conveyor 31, the turning thrust of the screw conveyor 31 decreases, the amount of dehydrated material discharged from the outlet opening 35 decreases, and the outer periphery of the screw conveyor 31 and the inside of the idle ring 30 The vicious circle that both sliding parts with the circumference wear and the dewatering function is lowered is repeated. In the worst case, the screw conveyor 31 and the idle ring 30 are damaged, or the Since a failure such as restraint stop of the Liu conveyor 31 is induced, in Patent Document 2, the downstream side of the cylindrical body (the latter half of the filtration cylinder) from the first conveyor on the upstream side (corresponding to the first half of the filtration cylinder) of the cylindrical body The second conveyor is rotated at a low speed, so that the object to be dehydrated is squeezed slowly and slowly, and the idle ring 30 is also driven to swing eccentrically. Trying to reduce.

  Further, in the configuration of Patent Document 1 in which the movable plate can be oscillated eccentrically driven only within a narrow eccentric range of the cam key, the regeneration function of the filtration gap is considerably inferior to the configuration of Patent Document 2 above. In the first half of the filter cylinder that receives the raw water with high flow rate and fluidity, a large amount of liquid cannot be quickly discharged from the filter gap to the outside of the filter cylinder, and the water content is relatively large and the viscosity and concentration are low. Since the dehydrated object in the state is transported to the latter half of the filter cylinder, by adding a second screw blade between the pitches of the screws located in the latter half of the filter body, the rotational propulsion effect of the screw is approximately doubled. However, this complicated multi-screw structure is costly and the turning thrust is doubled. If the amount of dehydrated material discharged from the outlet configured by opening and closing the door is too small, the dewatered object is over-squeezed into the compacted dehydrated material by the amount that the turning thrust of the screw is doubled. In this case, a failure that the screw is restrained and stopped is induced in the same manner as in Patent Document 2 described above. Therefore, in Patent Document 1, the first half of the movable plate is moved at different speeds in the first half and the second half of the filter cylinder. By swinging eccentrically driving at a higher speed than the latter half, the regeneration function of the filtration gap in the first half of the filtration cylinder is improved as much as possible, and the liquid quickly flows out from the filtration gap to the outside of the filtration cylinder. By transporting the dehydrated object with a higher concentration to the latter half of the filter cylinder and driving the movable plate in the latter half of the filter cylinder at a lower speed than the front half, the drainage resistance of the filtration gap is increased, and this high Overcoming drainage resistance With draining only water that is the water squeezing Te, it is trying to reduce the induction of the above-described failure by preventing less suppressing clogging the entry amount of dehydrated product into the filtration gap.

  However, as a result of repeated trial and error by the inventor, as a result of the movable plate in which the first half and the second half of the above-described filter cylinder are driven in the same manner and swinging eccentrically, the first half and the second half of the filter cylinder are movable. Since the rocking eccentricity of the plate is substantially the same, in the configuration described in Patent Document 1 or 2 in which the rocking eccentricity speed of the movable plate is higher in the first half than the latter half of the filter cylinder, how the latter is in the second half of the overcylinder. Even if the speed is changed between the first half and the first half, there is a limit in reducing the failure induction of each of the aforementioned Patent Documents 1 and 2 only by the speed, and in the configuration described in Patent Document 1 or 2 of the conventional device, It was found that stable dehydration efficiency could not be improved including reduction of failure induction.

JP 2000-246495 A (page 2-3, Fig. 1-3) Japanese Patent Laid-Open No. 9-220599 (2nd page, FIG. 1)

  The problem to be solved is based on the knowledge of the inventor described above, the problem described in Patent Document 1 or 2 of the conventional device is eliminated, each of the problems of failure induction is reduced, and the dehydration efficiency is low with few failures. It is an object of the present invention to provide a screw type filtration dewatering device which is compact and excellent in maintainability with low cost.

  In order to achieve the above object, the present invention is configured as follows.

  According to the first aspect of the present invention, a large number of fixed plates are arranged in a stacked form while maintaining a predetermined interval, and a large number of movable plates that can be eccentrically rotated between the respective stacked layers of the fixed plates are arranged in an alternately superposed arrangement. It is loosely fitted to form a cylindrical filter body with a slit between the fixed and movable plates as a drainage drainage groove, and a screw conveyor is installed in the center hole with the start end opening of the filter body as a sludge inlet. In the screw-type filtration and dewatering device having the terminal opening, which is fitted and mounted on the screw shaft so that the pressure regulating valve facing the annular valve seat of the terminal opening of the filter body is wide and narrow, the dewatering cake delivery port, the screw conveyor As a first drive mechanism for driving the filter, the inner diameter of the movable plate in the first half of the filter body is set to be smaller than the outer diameter of the screw conveyor so as to be in contact with the outer diameter of the screw conveyor. The inner peripheral surface of the movable plate is slidably contacted with the outer periphery of the blade of the screw conveyor that is turned by the driving of the first drive mechanism to eccentrically rotate the movable plate of the first half of the filter body, A second drive mechanism for setting the inner diameter of the movable plate to be larger than the outer diameter of the screw conveyor so as not to contact the outer diameter of the screw conveyor and rotating the movable plate of the latter half of the filter body eccentrically with an eccentric shaft; The first drive mechanism is configured to be provided individually.

  According to a second aspect of the present invention, in the screw type filtration dewatering device according to the first aspect, the second drive mechanism that eccentrically rotates the movable plate of the latter half of the filter body by an eccentric shaft is provided from a central hole of the filter body. It is provided outside.

  According to a third aspect of the present invention, in the screw type filtration dewatering device according to the first aspect, the second drive mechanism that eccentrically rotates the movable plate of the latter half of the filter body by an eccentric shaft is provided from a central hole of the filter body. It is provided inward.

  The invention according to claim 4 is the screw type filtration dehydrator according to claim 3, wherein a plurality of pins are arranged in a circular arrangement on the outer end surface of the annular valve seat to form an internal gear, The planetary gear meshing with the internal gear is rotatably mounted on the inner end surface of the pressure regulating valve, and the eccentric shaft is protruded on the inner end surface of the planetary gear with the tip toward the end opening of the filter body. It is characterized by this.

  The invention according to claim 5 is the screw filtration dewatering device according to claim 4, wherein the number of teeth of the planetary gear and the number of teeth of the internal gear is a combination of the number of teeth that is not an integer. Is.

  The invention according to claim 6 is the screw filtration dewatering device according to any one of claims 1 to 5, wherein the second drive mechanism for eccentrically rotating the movable plate of the latter half of the filter body by an eccentric shaft is a cam body. It is comprised by these.

  According to a seventh aspect of the present invention, in the screw type filtration dewatering device according to any one of the first to fifth aspects, the second drive mechanism that eccentrically rotates the movable plate of the latter half of the filter body with an eccentric shaft is a spiral body. It is characterized by being comprised.

  According to the first aspect of the present invention, the first and second drive mechanisms are individually provided so that the inner diameter of the movable plate in the first half of the filter body is smaller than the outer diameter of the screw conveyor. While the inner peripheral surface of the movable plate set to contact is slidably contacted with the outer peripheral edge of the screw conveyor that turns at a high speed by the first drive mechanism, the movable plate in the first half of the filter body is rotated eccentrically and rapidly. Because it is oscillated, the regenerating function of cleaning the filtration gap over a wide range allows the large amount of liquid to be quickly and rapidly squeezed without excessively squeezing the fluid raw material with high water content without clogging the filtration gap. The portion is discharged from the filter gap to the outside of the filter cylinder, and the object to be dehydrated having a low moisture content and a high viscosity and concentration is quickly conveyed to the latter half of the filter cylinder.

  Next, the dehydration object having a low moisture content and a high viscosity and concentration is subjected to the main dehydration filtration that is strongly squeezed by the drag of the pressure regulating valve provided at the end opening of the filter body and the thrust of the screw conveyor. In the latter half of the body, the inner diameter of the movable plate is made larger than the outer diameter of the screw conveyor, and the movable plate of the latter half of the filter body, which is set so as not to contact the outer diameter of the screw conveyor, is reduced by the second drive mechanism. In addition, it is swung while rotating eccentrically at low speed, and the filtration gap regeneration function of the narrow gap narrows the drainage channel resistance, so that only the squeezed water is drained by overcoming this high drainage channel resistance, By suppressing the amount of dehydrated material entering the filtration gap and preventing clogging, the dehydrated product can be efficiently discharged and collected without leaking from the filtration gap. At the same time, since the infiltration of the dehydrated material into the filtration gap is suppressed, not only the second drive mechanism can be driven with small power, but also the second drive that eccentrically rotates the opposed end face of the fixed and movable plate and the movable plate. Since the wear of the sliding portion of the mechanism is extremely small, there is an effect that the running cost with few failures and good dehydration efficiency is not increased.

  And in addition to the effect of the said 1st aspect, since the 2nd drive mechanism is provided in the outward of the center hole of the filter body, the invention of the 2nd aspect eccentrically rotates a movable plate with an eccentric shaft. Since the object to be dehydrated does not come into contact with the sliding portion, there is an effect that the movable plate is slid very smoothly and stably eccentrically rotated.

  In addition to the effect of the first aspect, the third aspect of the invention is characterized in that the second drive mechanism is provided inward of the center hole of the filter body, so that the drive portion of the second drive mechanism is provided in the apparatus. Since it can be configured inward, it has the advantage that it can be configured as a screw type filtration dehydrator that is compact in the outer peripheral direction.

  In addition to the effect of claim 3, the invention of claim 4 is configured such that an internal gear is formed by implanting a plurality of pins in a circular arrangement on the outer end surface of the annular valve seat, and meshes with the internal gear. Since the planetary gear that rotates is axially mounted on the inner end surface of the pressure regulating valve so that the planetary gear is rotatably mounted, the eccentric shaft projects from the end opening portion of the filter body. Scraping out the hard-to-discharge dehydrated material that has been squeezed into a consolidated solid state and discharged from the end opening gap between the opposing surfaces of the valve seat and the pressure regulating valve, and cuts off the fibrous foreign matter contained in the dehydrated material Therefore, it has the effect that drainage can be smoothly discharged and collected while preventing the end opening gap from being blocked. Furthermore, since the eccentric shaft is projected on the inner end face of the planetary gear with the tip thereof being directed into the terminal opening of the filter body, the object to be dehydrated is caused by the thrust of the screw conveyor and the drag of the pressure regulating valve. In the latter half of the filter body of the dehydration that is strongly squeezed, the dehydrated material that is hard to convey is revolved in synchronism with the rotation of the screw conveyor while the eccentric shaft rotates. The dehydrated material that is hard to convey in the latter half of the filter body over the entire circumference is solved by the swirling and stirring action due to the rotation and revolution of the eccentric shaft, so that it is smoothly conveyed to the terminal opening. As a result, the dehydrated product can be discharged and collected more smoothly.

  In addition, since the inner peripheral edge of the movable plate is slid to the outer peripheral edge of the eccentric shaft and is eccentrically rotated, the eccentric drive position of the movable plate is always fixed from the same direction as in the patent document 1, and in a narrow range. The orbitally filtered filtration slit revolves in synchronism with the rotation of the screw conveyor while the eccentric shaft rotates as compared with the conventional product, which is constrained by the combined position of the substantially identical filtration plate and movable plate facing surface positions. Therefore, when the eccentric driving load is applied to the inner edge of each movable plate in the latter half of the filter body in the radial direction of 360 degrees around the entire circumference, the movable plates are sequentially eccentrically rotated with a uniform force over the entire circumference of 360 degrees. Since the combination of the opposing surface positions of the fixed plate and movable plate of the filtration gap is sequentially displaced, both plate surfaces of the filtration gap are evenly worn, so local wear does not occur, Effect has that reproduction function periodically filtration gap is performed smoothly and stably.

  In addition to the effect of claim 4, the invention of claim 5 uses a combination of the number of teeth of the planetary gear and the number of teeth of the internal gear that does not become an integer. For example, the quotient becomes an integer. When the number of planetary gears of the external teeth is 6 and the number of internal gears is 12, the planetary gear rotates twice for one revolution, so the same external teeth and internal teeth must be Since they are meshed in combination, teeth with poor meshing mesh with each other and gradually wear abnormally, and eventually the entire internal gear and external gear will cause wear damage in a short time. On the other hand, when the number of teeth is not an integer, the combination of the teeth of the external teeth and the internal teeth is meshed while sequentially shifting. For example, when the number of external teeth is 5 and the number of internal gears is 12 In proportion to the number of internal teeth, badly meshed teeth are meshed every 12 revolutions. Therefore, in the case where the quotient of the number of teeth is not an integer, the meshing between the teeth with poor meshing is 12 revolutions per revolution with the quotient as an integer, so the gear life However, even if it is a simple calculation, the life is extended 12 times. However, since the wear is hardly concentrated on one tooth, the life of the gear is substantially increased 12 times or more.

  Further, in the eccentric shaft where the quotient of the number of teeth is not an integer, the combination of the external teeth and the internal teeth is meshed while sequentially shifting, so that the rotation posture state of the eccentric shaft is sequentially shifted with respect to revolution. For example, when the number of external teeth is 5 and the number of internal gears is 12 as described above, the initial rotation posture state is returned every 12 revolutions in proportion to the number of internal teeth. In addition, since the inner edge of the movable plate enters and exits uniformly over the entire circumference of the filter body, the function of regenerating the filtration gap by the eccentric rotation of the movable plate is also performed uniformly over the entire circumference of the filter body, and the number of internal teeth Since the movable plate periphery and the eccentric shaft outer edge are in sliding contact with each other only in proportion to the number of revolutions proportionally, the movable plate periphery and the eccentric shaft outer edge are not worn locally, and the movable plate periphery and the eccentric shaft outer edge are uniform. To be worn Since the eccentric rotation drive of the movable plate can be stably maintained over a long period of time, it has the effect of further improving the effect of the above-described long term regeneration function of the filtration gap being performed smoothly and stably. Yes.

  In addition to the effect of any one of the first to fifth aspects, in the invention of claim 6, the second drive mechanism for eccentrically rotating the movable plate of the latter half of the filter body by an eccentric shaft is constituted by a cam body. Therefore, it is easy to manufacture with a simple structure, and is easy to adjust and assemble with the movable plate, and has the advantages of excellent productivity and maintainability without increasing cost.

  In addition to the effect of any one of the first to fifth aspects, the invention according to claim 7 is that the second drive mechanism that eccentrically rotates the movable plate of the latter half of the filter body with an eccentric shaft is formed of a spiral body. Then, the sliding contact edge of each movable plate is subject to the respective sliding sliding contact positions on the outer periphery of the spiral of the spiral body, so that each movable plate is successively subject to the eccentric direction of the previous movable plate. Because there is a movable plate that is eccentrically rotated and there is a movable plate that is eccentrically raised and there is a movable plate that is eccentrically lowered, all the movable plates are not eccentrically rotated in the same eccentric direction at the same time. Each movable plate can be eccentrically rotated with a small driving force.

  In particular, in the configuration in which the second drive mechanism of the third aspect is provided inward from the center hole of the filter body, the propulsion direction by the rotation of the spiral body is directed toward the terminal opening of the filter body as depicted in FIG. Since the dehydration object tries to leak in the forward discharge direction from the notch of the screw conveyor that passes through the spiral body, the opposing thrust action by the spiral body causes the While preventing the leakage of the object to be dehydrated, the inner peripheral edge of each movable plate is subject to the rotational sliding contact position of the outer peripheral edge of the spiral body in turn by the rotation of the spiral body as shown in FIG. Since the filter body revolves, the inner periphery of the movable plate enters and exits into the annular gap between the inner periphery of the fixed plate and the outer periphery of the screw conveyor over the entire periphery of the filter body. Object has the effect that the annular gap I cooperation with the action to be leaked to the discharge direction of the front is suppressed from dehydration object can be sufficiently squeezed and dewatered.

  A large number of fixed plates are arranged in a stacked manner while maintaining a required interval, and a large number of movable plates that can be eccentrically rotated between the respective stacked layers of the fixed plates are loosely fitted in an alternating superposed array to fix and move the above. Is formed in a cylindrical filter body having a slit between each plate as a drainage groove, and a screw conveyor is fitted in the center hole with the opening at the start end of the filter body as a sludge feed port, and the end of the filter body is formed. In a screw-type filtration and dehydration apparatus using a terminal opening having a pressure adjusting valve facing the annular valve seat of the opening that is mounted on the screw shaft so as to be wide and narrow, and a dewatering cake delivery port, a first drive mechanism that drives the screw conveyor As described above, the inner diameter of the movable plate in the first half of the filter body is set to be smaller than the outer diameter of the screw conveyor so as to be in contact with the outer diameter of the screw conveyor. The movable plate in the first half of the filter body is eccentrically rotated by sliding contact with the outer periphery of the blade of the screw conveyor that is turned by the driving of the first drive mechanism, and the inner diameter of the movable plate in the second half of the filter body is A second driving mechanism that is set to have a larger diameter than the outer diameter so as not to come into contact with the outer diameter of the screw conveyor and rotates the movable plate of the latter half of the filter body eccentrically with an eccentric shaft; and the first driving mechanism, Are provided individually.

  1 to 8, reference numeral 1 denotes a cylindrical filter body, which is wider than the thickness of the movable plate 1KA between a large number of fixed plates 1KO and 1KO by a frame 1F of the filter body 1 having a large opening. A plurality of spacers 1S are arranged to keep the required intervals and are arranged in a stack, and a plurality of the movable plates 1KA... 1KA that can be eccentrically rotated between the respective stacks of the fixed plate 1KO are alternately superimposed. It is loosely fitted in the array, and is formed in a cylindrical filter body 1 having a slit between the fixed plate 1KO and the movable plate 1KA as drainage outflow grooves 2... 2, and the starting end opening of the filter body 1 is made of sludge. A screw bolt 5 is fitted in the center hole 4 as the feed port 3, and a set bolt 14 provided on the boss portion of the pressure regulating valve 8 facing the annular valve seat 6 in the terminal opening of the filter body 1 is illustrated. No pressure control valve 8 In a screw-type filtration and dehydration apparatus in which a terminal opening having a pressure adjusting valve 8 attached to a screw shaft 5S in a wide and narrow manner by a pressure adjusting spring or the like that presses the surface is used as a dewatering cake delivery port 12, the screw conveyor 5 is driven by a prime mover 15. As a first drive mechanism for driving the movable plate 1KA, the inner diameter of the movable plate 1KA of the filter first half FF is set to be smaller than the outer diameter of the screw conveyor 5 so as to be in contact with the outer diameter of the screw conveyor 5. The inner peripheral surface is slidably contacted with the outer peripheral edge of the blade 5B of the screw conveyor 5 that is turned by the drive of the first drive mechanism, whereby the movable plate of the filter first half FF is eccentrically rotated by the eccentric shaft 11, and the filtration is performed. Since the inner diameter of the movable plate 1KA of the rear half part RF is larger than the outer diameter of the screw conveyor 5, the screw conveyor 5 The inner diameter of the movable plate 1KA is made larger in the latter half RF than the first half FF of the filter body, or the outer diameter of the screw conveyor 5 is made smaller in the second half RF than the first half FF of the filter body so as not to contact the outer diameter. A second driving mechanism and a first driving mechanism, which are set in a non-contact state and eccentrically rotate the movable plate 1KA of the filter latter half part RF, are individually provided.

  On the premise of the configuration of the first embodiment, as shown in FIGS. 12 to 14, the second drive mechanism that eccentrically rotates the movable plate 1KA of the filter rear half RF with the eccentric shaft 11 is the center hole of the filter body 1. An eccentric drive hole 1KAH having a size that allows the eccentric shaft 11 to be eccentrically rotated is formed in a seat portion of the movable plate 1KA that is stretched outward from the outer periphery of the filter body 1 and above the outer periphery of the filter body 1. The movable plate 1KA is suspended by the eccentric shaft 11 inserted into the 1KAH, or each movable plate 1KA... 1KA of the suspended filter rear half RF is subjected to the eccentric rotation of the eccentric shaft 11 and the pendulum In this way, it is configured to be eccentrically driven to swing in the vertical direction while swinging left and right. In addition, as shown in FIG. 12, the second drive mechanism may be driven by a driven gear 11G that meshes with a transmission gear 5G fitted to the screw shaft 5S.

  Further, as shown in FIG. 15 and FIG. 16, the outer peripheral edge of the annular movable plate 1KA is directly supported by the outer edge of the eccentric shaft 11 without drilling the eccentric drive hole 1KAH, and at least one of them is supported. The second drive mechanism is configured to smoothly drive each movable plate 1KA... 1KA of the filter rear half RF by the eccentric rotation of the eccentric shaft 11, and the remaining for the eccentric drive. You can also.

  Assuming the configuration of the first embodiment, as shown in FIGS. 1 and 9, the second drive mechanism that eccentrically rotates the movable plate 1KA of the filter rear half RF with the eccentric shaft 11 is a central hole of the filter body 1. 4, the outer edge of the eccentric shaft 11 projecting inward from the inner periphery of the movable plate 1KA is in sliding contact with each other, and the movable plate 1KA,. It is configured to drive eccentric rotation.

  Assuming the configuration of the third embodiment, as shown in FIGS. 1 to 11, an internal gear 7 is configured by planting a plurality of pins in a circular arrangement on the outer end surface of the annular valve seat 8, The planetary gear 9 meshing with the internal gear is fitted to the screw shaft 5S and attached to the pressure adjusting valve 8 that rotates synchronously, and the planetary shaft rotatably attached to the inner end surface of the pressure adjusting valve 8 The eccentric shaft 11 having a tip projecting from the inner end surface of the gear 9 toward the terminal opening of the filter body 1 rotates the pressure adjusting valve 8 by the rotation of the screw shaft 5S. Since the meshing planetary gear 9 is revolved while rotating between the opposed surfaces of the annular valve seat and the pressure regulating valve, the eccentric shaft 11 protruding from the inner end surface of the planetary gear 9 is the latter half of the filter body RF. As it is revolved while rotating inside, it is discharged into a consolidated solid state Difficult dehydrated matter is fibrous foreign matter contained in the dehydrated material from between the opposed surfaces of the annular valve seat and the pressure regulating valve by the planetary gear 9 as in the cutting / scraping region 16 of the planetary gear 9 shown in FIG. 5 and the movable plate 1KA, while removing the dehydrated material in the latter half RF portion of the filter body by the eccentric shaft 11, like the stirring region 17 of the eccentric shaft 11 shown in FIG.・ Oscillate 1KA and drive eccentric rotation.

  Assuming the configuration of the fourth embodiment, as shown in FIG. 2, the number of teeth of the planetary gear 9 is 5 and the number of teeth of the internal gear 7 is a combination of 12 teeth whose quotient is not an integer. It is composed.

  Assuming the configuration of any one of the first to fifth embodiments, as shown in FIGS. 9 to 14, the eccentric shaft of the second drive mechanism that eccentrically rotates the movable plate 1KA of the filter rear half RF with the eccentric shaft 11, as shown in FIGS. 11 is formed on the cam body 11K, and a movable plate is formed by extending the outer edge of the cam body 11K outward from the center hole 4 of the filter body 1 and above the outer periphery of the filter body 1 as shown in FIGS. An eccentric drive hole 1KAH having a size that allows the eccentric rotation of the cam body 11K is formed in the 1KA seat, and the movable plate 1KA is suspended by the cam body 11K inserted into the eccentric drive hole 1KAH. That is, each movable plate 1KA... 1KA of the suspended filter rear half RF is subjected to eccentric rotation of the cam body 11K and swings up and down while swinging left and right like a pendulum to drive eccentrically. As shown in FIGS. 9 to 11, the cam body 11K protruding from the center hole 4 of the filter body 1 is inserted into the notch 5H of the screw conveyor 5 and is inserted into the filter body rear half RF. Rotating while revolving, the outer edge of the cam body 11K comes into sliding contact with the inner peripheral edge of the movable plate 1KA, and the movable plates 1KA... 1KA are swung over the entire 360 ° circumference in the filter latter half RF. It is configured to drive eccentric rotation.

  Assuming the configuration of any one of the first to fifth embodiments, as shown in FIGS. 1 to 6 and FIGS. 17 to 19, the second movable plate 1KA of the filter rear half RF is eccentrically rotated by the eccentric shaft 11. The eccentric shaft 11 of the drive mechanism is formed in the spiral body 11R, and the outer edge of the spiral body 11R is stretched outward from the center hole 4 of the filter body 1 and above the outer periphery of the filter body 1 as shown in FIGS. In the seat of the movable plate 1KA thus formed, an inside of the eccentric drive hole 1KAH having a size allowing the rotation of the spiral body 11R is formed, and the movable plate 1KA is suspended by the spiral body 11R inserted into the eccentric drive hole 1KAH. The movable plates 1KA,... 1KA of the suspended filter latter half RF are configured to be sequentially swung and driven eccentrically by the rotation of the spiral body 11R, or as shown in FIGS. In this way, the spiral body 11R protruding in the center hole 4 of the filter body 1 is inserted into the notch 5H of the screw conveyor 5 and rotates while revolving within the filter body rear half portion RF. The movable plate 1KA is slidably contacted with the inner peripheral edge of the movable plate 1KA, and the movable plates 1KA,.

It is the vertical side view which showed schematically the structure of the screw-type filtration dehydration apparatus of Example 1, Example 3, Example 4, Example 7 of this invention. It is a principal part longitudinal cross-sectional view in the AA line of FIG. It is a principal part vertical side view in the BB line of FIG. It is a principal part longitudinal section front view in the CC line of FIG. It is explanatory drawing which showed the range where the dehydrated matter in the filter latter half part of Example 1, Example 3, Example 4, Example 7 of this invention is understood by a planetary gear and an eccentric shaft (helical body). It is explanatory drawing which illustrated the propelling action of this helical body by making the eccentric shaft in the filter latter half part of Example 1, Example 3, Example 4, and Example 7 of this invention into a helical body. The inner peripheral edge of the movable plate is slid on the outer peripheral edge of the screw conveyor in the first half of the filter body of the present invention, and the movable plate is a main part longitudinal side surface illustrating the eccentric drive state. It is a principal part longitudinal section front view in the DD line | wire of FIG. It is the vertical side view which showed schematically the structure of the screw-type filtration dehydration apparatus of Example 1, Example 3, Example 4, Example 6 of this invention. FIG. 10 is a longitudinal enlarged view of a main part showing the discharge part of FIG. 9. It is a principal part longitudinal section front view in the EE line of FIG. It is the vertical side view which showed schematically the structure of the screw type filtration dehydration apparatus of Example 1, Example 2, Example 6 of this invention. It is the principal part longitudinal cross-sectional enlarged view which showed the discharge part of FIG. It is a principal part longitudinal cross-sectional view in the FF line of FIG. In the screw type filtration and dehydration apparatus according to the first, second, and sixth embodiments of the present invention, a vertical side view schematically showing a configuration in which the outer periphery of a movable plate that does not require an eccentric drive hole is directly driven by an eccentric shaft (cam body). FIG. It is a principal part longitudinal cross-sectional view in the GG line of FIG. It is the vertical side view which showed schematically the structure of the screw type filtration dehydration apparatus of Example 1, Example 2, Example 7 of this invention. FIG. 18 is an enlarged view of a main part longitudinally showing the discharge part of FIG. 17. It is a principal part longitudinal cross-sectional view in the HH line | wire of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filter body 1KA Movable plate 1KO Fixed plate 2 Filtrate outflow groove 3 Sludge inflow port 4 Center hole 5 Screw conveyor 5S Screw shaft 6 Annular valve seat 7 Internal gear 8 Pressure adjustment valve 9 Planetary gear 11 Eccentric shaft 11K Cam body 11R Spiral body 12 Dewatered cake delivery port FF Filter body first half RF filter latter half

Claims (7)

  A large number of fixed plates are arranged in a stacked manner while maintaining a required interval, and a large number of movable plates that can be eccentrically rotated between the respective stacked layers of the fixed plates are loosely fitted in an alternating superposed array to fix and move the above. Is formed in a cylindrical filter body having a slit between each plate as a drainage groove, and a screw conveyor is fitted in the center hole with the opening at the start end of the filter body as a sludge feed port, and the end of the filter body is formed. In a screw-type filtration and dehydration apparatus using a terminal opening having a pressure adjusting valve facing the annular valve seat of the opening that is mounted on the screw shaft so as to be wide and narrow, and a dewatering cake delivery port, a first drive mechanism that drives the screw conveyor As described above, the inner diameter of the movable plate in the first half of the filter body is set to be smaller than the outer diameter of the screw conveyor so as to come into contact with the outer diameter of the screw conveyor. The movable plate in the first half of the filter body is eccentrically rotated by sliding contact with the outer periphery of the blade of the screw conveyor that is turned by the driving of the first drive mechanism, and the inner diameter of the movable plate in the second half of the filter body is set to the A second driving mechanism that is set to have a larger diameter than the outer diameter so as not to come into contact with the outer diameter of the screw conveyor and rotates the movable plate of the latter half of the filter body eccentrically with an eccentric shaft; and the first driving mechanism, A screw-type filtration and dehydration device, characterized in that each is individually provided.   2. The screw type according to claim 1, wherein a second drive mechanism that eccentrically rotates the movable plate of the latter half portion of the filter body by an eccentric shaft is provided outward from a center hole of the filter body. Filtration dehydrator.   2. The screw type according to claim 1, wherein a second drive mechanism that eccentrically rotates the movable plate of the latter half of the filter body by an eccentric shaft is provided inward from a center hole of the filter body. Filtration dehydrator.   A plurality of pins are arranged in a circular arrangement on the outer end surface of the annular valve seat to form an internal gear, and a planetary gear meshing with the inner gear is rotatably attached to the inner end surface of the pressure regulating valve. The screw-type filtration and dewatering device according to claim 3, wherein the eccentric shaft is protruded on the inner end face of the planetary gear with the tip end toward the end opening of the filter body.   The screw-type filtration and dewatering device according to claim 4, wherein a combination of the number of teeth of the planetary gear and the number of teeth of the internal gear is not an integer.   The screw-type filtration and dehydration according to any one of claims 1 to 5, wherein the second drive mechanism that eccentrically rotates the movable plate of the latter half of the filter body with an eccentric shaft is constituted by a cam body. apparatus.   The screw-type filtration and dehydration device according to any one of claims 1 to 5, wherein the second drive mechanism that eccentrically rotates the movable plate of the latter half of the filter body with an eccentric shaft is formed of a spiral body. .

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