JP5448206B2 - centrifuge - Google Patents

Description

  The present invention relates to a centrifuge configured to discharge a solid generated in a basket by a solid-liquid separation process downward from a solid discharge hole provided in a bottom wall portion of the basket.

  As shown in Patent Document 1 to Patent Document 3, the solid material generated in the basket by the solid-liquid separation process is discharged downward from the solid material discharge hole provided in the bottom wall portion of the basket. A centrifuge is used.

  This type of centrifuge is a concentric arrangement of a peripheral wall portion arranged with its axis line directed vertically, a bottom wall portion closing the lower end of the peripheral wall portion, and a boss portion and a boss portion fixed to the center portion of the bottom wall portion. A basket having an annular projecting portion formed so as to surround the bottom wall portion and projecting downward from the bottom wall portion, and a solid material discharge hole formed between the annular projecting portion and the boss portion, and a fixed frame. A rotating shaft that is rotatably supported by a bearing device and whose upper end is coupled to the boss portion of the basket, and a clearance formed between the fixed frame and the annular protruding portion of the basket, A cylindrical solid material guide duct that concentrically surrounds a part of the annular protrusion from the outside and a rotation drive device that drives the rotation shaft are provided.

In this type of centrifuge, the stock solution is supplied into a rotating basket and subjected to solid-liquid separation, and the generated solid matter is washed with a washing liquid, and then generated in the basket. The collected solid matter is scraped off by a scraping device and dropped from the solid matter discharge hole inside the annular protruding portion protruding from the bottom wall portion of the basket, and the dropped solid matter is arranged at the lower part of the centrifuge. Collect in a solid collection tank.

  In centrifuges used for the manufacture of pharmaceuticals, etc., the inner and outer surfaces of the basket and the duct for guiding the solid matter every time one lot of the solid-liquid separation process is completed in order to prevent the generated solid matter from being contaminated. It is necessary to carefully clean the inside of the machine. In order to facilitate cleaning of the lower surface of the bottom wall portion of the basket and the solid material guiding duct and to facilitate confirmation of the cleaning result, as shown in Patent Document 1, Patent Document 2 or Patent Document 3, Centrifuges have been used for a long time since the lower surface of the basket is positioned above the upper end surface of the bearing device that supports the rotating shaft of the basket so that a gap is formed between the lower surface of the basket and the bearing device. Are known. As also seen in Patent Document 3, the solid material guide duct is divided into a plurality of duct constituent members that are bolted to the frame of the centrifuge, so that it can be attached and detached. There is also known an object guide duct that is removed from a centrifuge frame.

JP 59-189951 A Japanese Patent Laid-Open No. 1-151959 JP 2009-119334 A

  As described above, in order to facilitate cleaning of the basket and cleaning of the solid material guiding duct, a part of the annular projecting portion protruding from the lower surface of the bottom wall portion of the basket and the space below it are surrounded. When a structure is used in which the solid material guide duct is divided into a plurality of duct constituent members and each duct constituent member is attached to the centrifuge frame using bolts, the bolts are used when the duct constituent members are attached and detached. May fall into the solids collection tank, and if you do the solid-liquid separation process of the next lot without noticing the drop of the bolts, bolts will be mixed into the generated solids, causing a serious product accident There was a fear.

  In addition, when the duct component member is bolted to the fixed frame of the centrifuge, it is necessary to perform an operation of attaching and detaching a number of bolts when attaching and detaching each duct component member. It took a long time to attach and detach, and there was a problem that work efficiency was lowered.

  Further, when the duct component member is bolted to the fixed frame of the centrifuge, it takes a long time to remove the duct component member before cleaning the basket and the solid material guide duct. For this reason, when the solid matter generated by the solid-liquid separation process is a toxic substance, it takes a long time for the worker to be exposed to the toxic gas generated from the harmful substance, which may cause a serious injury.

  Further, when the duct components are removed from the centrifuge frame when cleaning the basket, it is necessary to clean the plurality of removed duct components separately from the centrifuge main body. It was troublesome.

  An object of the present invention is to provide a basket in which an annular protrusion for forming a solid matter discharge hole is formed on the lower surface of the bottom wall, a part of the annular protrusion, and a space below the annular protrusion. In the centrifuge provided with the solid material guiding duct surrounding the basket, the basket and the solid material guiding duct can be easily cleaned without removing the solid material guiding duct from the fixed frame. There is to do.

  The present invention protrudes from a peripheral wall portion whose axis is directed in the vertical direction, a bottom wall portion that closes a lower end of the peripheral wall portion, a boss portion fixed to the center portion of the bottom wall portion, and a lower surface of the bottom wall portion. A basket having an annular projection that is concentrically surrounding the boss and having a solid discharge hole formed between the annular projection and the boss, and a bearing device provided on the fixed frame. A rotating shaft whose upper end is coupled to the boss portion of the basket, and a cylindrical solid material guide duct which is attached to the fixed frame and concentrically surrounds a part of the annular projecting portion of the basket from the outside, The present invention is directed to a centrifuge provided with a rotary drive device that drives a rotary shaft.

  In the present invention, the solid material guiding duct is divided into a plurality of duct constituent members arranged along the circumferential direction of the annular projecting portion projecting from the lower surface of the bottom wall portion of the basket. Each duct constituent member is arranged in a state of being arranged around the annular projecting portion of the basket by the support device, and is in a state where it forms a solid material guiding duct together with other duct constituent members, and the annular projecting portion of the basket The fixed frame is arranged so that it can be displaced between an open position where the annular protrusion of the basket is opened from the state surrounded by the duct for solid matter guide, in a state where it is inclined obliquely in the direction away from the portion. Supported by

  The support device for supporting each duct component member is provided so as to extend in the tangential direction of the circle constituting the contour line of the cross section of the solid material guide duct, and a support shaft fixed to the outer peripheral portion of each duct component member; And a support fitting having a slot in which the support shaft is fitted and fixed to the fixed frame.

  The slot provided in the support metal fitting, a guide portion extending in the vertical direction, a shaft fitting holding portion provided at a position offset to the outside in the radial direction of the solid material guide duct from the upper end of the guide portion, It is formed in a shape having a communication passage that communicates between the upper end of the guide portion and the shaft fitting holding portion.

  The centrifuge according to the present invention is provided with the above-described configuration, so that the guide member of the slot of the support bracket corresponding to the support shaft fixed to each duct component by lifting each duct component arranged in the closed position. Is displaced to the upper end of the guide portion along the direction of the guide portion, and when the respective duct constituent members are displaced in a direction away from the annular projecting portion of the basket, the support shaft corresponds to the shaft fitting holding portion of the slot of the corresponding support fitting. It is configured so that each duct component member can be turned to the open position by fitting. That is, in the present invention, the duct constituting member constituting the solid material guiding duct is not provided detachably with respect to the fixed frame but is supported by the fixed frame in a state in which it can be opened and closed.

  If comprised as mentioned above, by displacing each duct structural member from the closed position to the open position, the plurality of duct structural members constituting the solid material guiding duct are separated (opening the duct structural member) In addition, the annular protrusion of the basket and the space below it can be released from the state surrounded by the solid material guide duct, thereby cleaning the basket and the solid material guide duct and confirming the result of each cleaning. Can be easily performed.

  In addition, the operation of displacing each duct component from the closed position to the open position can be performed by a simple operation of lifting the duct component and pulling it forward. The operation of returning to the simple position is as simple as raising each duct component member placed in the open position and dropping the support shaft fixed to each duct component member into the guide portion of the slot of the corresponding support fitting. Since the operation can be performed by the operation, the operation of opening the annular projecting portion of the basket and the space below it from the state surrounded by the solid material guiding duct, and the solid projecting of the annular projecting portion of the basket and the space below it are performed. The work of returning to the state surrounded by the duct for operation can be performed in a short time.

  In a preferred aspect of the present invention, when the support shaft fixed to each duct component member is fitted in the guide portion of the slot of the corresponding support fitting, each duct component member is in contact with the outer peripheral surface of each duct component member. Positioning portions for positioning the diametrically in the radial direction are provided on the support fittings corresponding to the respective duct constituent members.

  If comprised in this way, each duct structural member can be reliably hold | maintained in the closed position which is a normal position at the time of performing a solid-liquid separation process and collect | recovering solid substances from a basket.

  In another preferred aspect of the present invention, when a plurality of duct constituent members are arranged at the closed position, the adjacent duct constituent members are arranged across the upper portions of the adjacent circumferential ends of the adjacent duct constituent members. A connector for connecting adjacent circumferential end portions of the members is fixed to one upper portion of adjacent circumferential end portions of adjacent duct constituent members. Each connector has a circumferential end portion of another duct component adjacent to the duct component to which each connector is fixed when the duct component to which the connector is fixed is returned from the open position to the closed position. It is comprised so that it may fit from above and the circumferential direction edge part of the duct structural member to which each connection tool was fixed, and the circumferential direction edge part of the other adjacent duct structural member may be connected.

  If comprised as mentioned above, in the state which returned each duct structural member to the closed position and comprised the duct for solid substance guidance, the adjacent circumferential direction edge parts of a series of duct structural members are mutually connected by a connector. Therefore, the mechanical strength of the solid material guiding duct can be increased.

  In a preferred aspect of the present invention, a handle used for lifting each duct component is attached to the outer periphery of each duct component, and the handle contacts the fixed frame when each duct component is rotated to the open position. The duct components are positioned in the open position.

  According to the present invention, the plurality of duct constituent members constituting the solid material guide duct surrounding the annular projecting portion projecting from the lower surface of the bottom wall portion of the basket are displaced to the open position, thereby Since the protrusion and the space below the opening can be opened, the basket can be easily cleaned and the cleaning result can be confirmed. Further, in the state where each duct component member is displaced to the open position, the inner surface of each duct component member can be exposed to the outside, so that each duct component member is supported by the fixed frame of the centrifuge. The inner surface of the duct component can be cleaned, and the basket and the solid material guiding duct can be cleaned efficiently.

  In addition, the operation of displacing each duct component member to the open position can be performed by a simple operation of lifting each duct component member upward and pulling it forward. When the solid matter generated by the solid-liquid separation process is toxic, the time when the worker is exposed to the toxic gas generated from the solid matter can be shortened. It is possible to prevent the washing operation of the basket and the solid material guiding duct from causing a serious injury.

  Further, according to the present invention, the operation of opening and closing the plurality of duct constituent members constituting the solid material guiding duct can be performed without any bolt attaching / detaching operation, so that the bolt falls into the solid material collecting tank. Thus, it is possible to eliminate the possibility of an accident in which the bolt is mixed into the solid material.

It is a longitudinal cross-sectional view which shows the principal part of one Embodiment of the centrifuge concerning this invention. FIG. 2 is a cross-sectional view showing a centrifuge according to the present invention along a line II-II in FIG. 1. (A), (B), and (C) are a top view, a front view, and a left side view of a support fitting used in the present embodiment, respectively. (A) is a front view of the principal part of the duct structural member used by this embodiment, (B) is the BB sectional drawing of (A). It is a top view of the support device used in this embodiment. (A) thru | or (C) is a side view which shows operation | movement of the support apparatus used by this embodiment. In this embodiment, it is the side view which showed an example of the coupling tool used in order to connect the circumferential direction edge part of each duct structural member to the circumferential direction edge part of the other adjacent duct structural member. (A) And (B) is the top view and front view of the principal part which showed the structure of the connector of the circumferential direction edge part of an adjacent duct structural member, respectively, (C) is the adjacent circumferential direction edge parts connected. It is the front view which showed the state which displaced one of the two duct structural members currently located upwards.

Hereinafter, a configuration of an embodiment of the present invention will be described in detail with reference to the drawings.
1 and 2, reference numeral 1 denotes a centrifuge having a cylindrical peripheral wall portion 1a disposed with its central axis oriented in the vertical direction (vertical direction) and a base portion (not shown) that supports the lower portion of the peripheral wall portion 1a. In the fixed frame of the separator, on the outer periphery of the portion near the upper end of the peripheral wall portion 1a, an overhang portion 1b comprising an annular bottom plate portion 1b1 and a cylindrical upright wall portion 1b2 rising upward from the outer peripheral portion of the bottom plate portion 1b1. Are integrally formed. Between the portion near the upper end of the peripheral wall portion 1a and the overhang portion 1b, a liquid portion collecting groove portion 1c for collecting the liquid portion generated when the solid-liquid separation process is performed is formed.

  The fixed frame 1 also has a cylindrical rotating shaft holding portion 1d disposed inside the peripheral wall portion 1a so as to share the axis with the peripheral wall portion. The illustrated rotating shaft holding portion 1d is formed in a shape having an outer peripheral surface that is tapered such that its outer diameter gradually decreases from the lower side toward the upper side. The rotating shaft holding portion 1d is provided in a state where the lower end thereof is integrated with a base portion (not shown) of the fixed frame 1, and the upper end surface of the rotating shaft holding portion 1d is at the same height as the upper end surface of the peripheral wall portion 1a. It is terminated.

  Inside the rotating shaft holding portion 1d, a rotating shaft 2 extending vertically is arranged in a state of sharing the axis with the rotating shaft holding portion 1d. The rotating shaft 2 is provided in a state in which a portion of a certain length near the upper end protrudes upward from the upper end of the rotating shaft holding portion 1d, and the portion near the upper end and the lower end of the rotating shaft holding portion 1d. The bearing 3 is supported rotatably on the fixed frame 1 by bearings 3 each holding an outer ring on the inner periphery of the portion. FIG. 1 shows only the bearing 3 held in the portion near the upper end of the rotating shaft holding portion 1d among the bearings supporting the rotating shaft 2.

  At the upper end of the rotating shaft holding portion 1d, the upper end opening of the gap formed between the peripheral wall portion of the rotating shaft holding portion and the rotating shaft 2 is closed and held at a portion near the upper end of the rotating shaft holding portion 1d. A cover plate 4 that holds the outer ring of the bearing 3 is attached with screws 5. The cover plate 4 has a peripheral wall portion 4 a erected upward from a portion near the inner periphery thereof, and an oil seal 6 is disposed between the peripheral wall portion 4 a and the outer periphery of the rotary shaft 2. In the present embodiment, the rotating shaft 2 is rotatably supported with respect to the fixed frame 1 by the rotating shaft holding portion 1 d provided on the fixed frame 1, the bearing 3, the lid plate 4, and the oil seal 6. A bearing device 7 is configured.

  A male screw portion 2a is formed at the upper end of the rotating shaft 2 protruding upward from the bearing device 7, and a tapered portion 2b is formed at a portion located below the male screw 2a. A basket 10 described later is attached to the tapered portion 2 b of the rotating shaft 2. The lower end of the rotating shaft 2 is mechanically coupled to an output shaft of a rotary drive device (not shown) such as an electric motor supported by the fixed frame 1 via an appropriate power transmission mechanism. The power transmission mechanism that couples the rotary shaft 2 to the output shaft of the rotary drive device includes, for example, a pulley attached to the lower end of the rotary shaft 2, a pulley attached to the output shaft of the rotary drive device, and both pulleys. The belt is made up of.

  The basket 10 includes a peripheral wall portion 10a arranged with its axis line directed in the vertical direction, a bottom wall portion 10b that closes a lower end of the peripheral wall portion 10a, a boss portion 10c that is fixed to a central portion of the bottom wall portion 10b, and a bottom wall A plurality of solid matter discharge holes 10e formed between the annular projecting portion 10d and the boss portion 10c, the annular projecting portion 10d projecting from the lower surface of the portion 10b and concentrically surrounding the boss portion 10c. It is well known. The annular projecting portion 10d and the boss portion 10c are mechanically coupled by a plurality of radially provided ribs 10f, and solid matter discharge holes 10e are formed between the plurality of ribs 10f. Although not shown in the drawing, an inner flange portion is formed at the inner peripheral portion at the upper end of the peripheral wall portion 10a of the basket 10, and an opening portion of the basket is formed inside the inner flange portion. A number of transmission holes are formed in the peripheral wall portion 10a of the basket 10, and a filter is disposed on the inner periphery of the peripheral wall portion 10a.

  A tapered hole 10g is formed in the axial center portion of the boss portion 10c, and the tapered portion 2b of the rotating shaft 2 is fitted into the tapered hole 10g. Then, the cap nut 11 is screwed into the male screw portion 2a of the rotating shaft 2 protruding upward from the upper end of the boss portion 10c, and the nut 11 is tightened to attach the basket 10 to the rotating shaft 2. .

A cylindrical basket cover 20 having a peripheral wall portion 20a and a ceiling portion (not shown) for closing the upper end of the peripheral wall portion 20a is disposed at the upper end of the standing wall portion 1b2 of the overhang portion 1b of the fixed frame 1. Yes. The basket cover 20 is rotatably supported on the overhang portion 1b of the fixed frame 1 via a hinge (not shown). The basket cover 20 is operated by a driving source such as a hydraulic cylinder, and is between a closed position where the basket 10 is housed inside as shown in FIG. 1 and an open position where the basket 10 is exposed. Is rotated and displaced. On the ceiling wall of the basket cover 20, a liquid supply pipe for supplying the stock solution into the basket 10 and a solid material scraping device for scraping the solid material generated in the basket 10 are attached. When placed in the closed position shown in FIG. 1, a liquid supply pipe and a solid material scraping device (both not shown) are inserted into the basket 10 through the upper end opening of the basket 10. .

  The illustrated basket 10 is configured such that a lower end 10d1 of an annular projecting portion 10d projecting from the lower surface of the bottom wall portion 10b and a lower end 10c1 of a boss portion 10c are arranged on the same plane, The lower end 10d1 of the portion 10d and the lower end 10c1 of the boss portion 10c are attached to the rotary shaft 2 in a state where they are positioned above the upper end of the peripheral wall portion 1a of the fixed frame 1. Therefore, a gap G is formed between the lower end of the annular projecting portion 10 d of the basket 10 and the upper end of the fixed frame 1. A cup provided with a peripheral wall portion 21a concentrically surrounding a peripheral wall portion 4a provided on the cover plate 4 that closes the upper end opening of the rotary shaft support portion 1c at a portion near the rotary shaft 2 on the lower surface of the boss portion 10c of the basket 10 An oil seal holding member 21 is attached, and an oil seal 22 is provided between the peripheral wall portion 21 a of the oil seal holding member 21 and the peripheral wall portion 4 a of the lid plate 4. In order to enable cleaning between the boss portion 10 c of the basket and the upper end of the bearing device 7, the peripheral wall portion 21 a of the oil seal holding member 21 is a gap formed between the boss portion 10 c and the upper end of the bearing device 7. Is provided (at a position close to the peripheral wall portion 4a of the cover plate 4).

  At the upper end of the peripheral wall portion 1 a of the fixed frame 1, a gap G formed between the lower end of the annular projecting portion 10 d of the basket 10 and the upper end of the peripheral wall portion 1 a of the fixed frame 1, and the annular projecting portion 10 d of the basket 10. A cylindrical solid material guiding duct 30 that concentrically surrounds a part (a portion closer to the lower end) from the outside is attached. The solid material guiding duct 30 is divided into a plurality of duct constituent members arranged along the circumferential direction of the annular projecting portion 10 d of the basket 10. In this embodiment, the solid material guiding duct 30 is divided into four duct components 30A to 30D having the same circumferential length, and these duct components are aligned around the annular protrusion 10d of the basket. The cylindrical solid material guiding duct 30 concentrically surrounds a part of the basket annular protrusion 10d (a part near the lower end) and the gap G below the annular protrusion 10d from the outside. Is configured.

  The duct constituent members 30A to 30D are attached to the upper part of the peripheral wall portion 1a of the fixed frame 1 by support devices 31A to 31D provided for the respective duct constituent members 30A to 30D. The supporting devices 31A to 31D that respectively support the duct constituent members 30A to 30D are disposed at the lower portions of the respective central portions in the circumferential direction of the duct constituent members 30A to 30D, and the duct constituent members 30A to 30D are illustrated in FIG. It is configured to be displaced to a closed position indicated by a solid line and an open position indicated by a chain line in FIG.

  Here, the closed position of each duct constituent member means that each duct constituent member is arranged in a state of being aligned around the annular protrusion of the basket 10 together with the other duct constituent members. It is the position of each duct constituent member when it is in a state in which a cylindrical solid material guiding duct 30 that concentrically surrounds the annular projecting portion 10d of the basket together with the member.

  Further, the open position of each duct component member means that each duct component member is disposed in a state where the duct component member is inclined obliquely in a direction away from the annular projecting portion 10d of the basket 10, and the annular projecting portion 10d of the basket 10 and the annular projecting portion are arranged. This is the position of each duct component when the space below is opened from the state surrounded by the solid material guiding duct 30.

  Hereinafter, the configuration of the support device 31A that supports the duct component 30A will be described in detail. As shown in FIG. 4, the support device 31A for supporting the duct component member 30A has a first attachment plate 32 and a second attachment plate on the outer periphery of the lower portion of the center portion in the circumferential direction of the duct component member 30A. 3 and a support shaft 34 attached to the upper peripheral portion of the peripheral wall portion 1a of the fixed frame 1 as shown in FIG.

  The support shaft 34 attached to the duct constituent member 30A is provided so as to extend in the tangential direction of the circle constituting the outline of the cross section of the cylindrical solid material guiding duct 30, and the circumference of the duct constituent member 30A is The first and second mounting plates 32 and 33 are fixed to the outer peripheral portion at the lower portion of the central portion in the direction.

  The first mounting plate 32 is made of a metal plate having a cylindrical inner peripheral surface 32a along the outer peripheral surface of the duct constituent member 30A and a flat outer surface 32b extending in a tangential direction of the outer peripheral surface of the duct constituent member 30A. The inner peripheral surface 32a is aligned with the outer peripheral surface of the duct component member 30A, and the lower end position thereof is aligned with the lower end position of the duct component member 30A. It is fixed to the surface by welding or screwing.

  The second mounting plate 33 is a rectangular flat plate made of metal. The second mounting plate 33 is disposed along the outer surface 32b of the first mounting plate 32 with its lower end protruding below the lower end of the duct component 30A by a certain protruding dimension d, and welded. Etc., and is fixed to the first mounting plate 32. The support shaft 34 has a length sufficiently longer than the width dimension of the second mounting plate 33 (the length measured in the circumferential direction of the duct constituent member 30A), and the longitudinal direction thereof is defined as a solid material guiding duct. The second mounting plate 33 is arranged in a state in which both ends in the longitudinal direction thereof are projected from both ends in the width direction of the second mounting plate 33 in the tangential direction of the circle constituting the outline of the cross section 30. It is welded to the lower end. Projection dimensions L from the width direction ends of the second mounting plate 33 at both ends of the support shaft 34 are set to be equal.

  The support fitting 36 that constitutes the support device 31 </ b> A together with the support shaft 34 is attached to the peripheral wall portion 1 a of the fixed frame 1 via the attachment plate 35. The mounting plate 35 includes a cylindrical inner peripheral surface 35a along the outer peripheral surface of the peripheral wall portion 1a of the fixed frame, and a flat outer surface 35b extending in a tangential direction of a circle constituting the cross-sectional contour of the solid material guiding duct 30. Are fixed to the outer peripheral surface of the upper portion of the peripheral wall portion 1a by welding or screwing in a state where the inner peripheral surface 35a is attached to the outer peripheral surface of the peripheral wall portion 1a of the fixed frame. Yes.

  As shown in FIG. 3, the support metal fitting 36 is disposed in a state of being attached to the outer surface 35a of the attachment plate 35 and fixed to the attachment plate 35 by welding or the like and fixed to the attachment plate 35. A pair of upright portions 36b and 36b are provided that rise upward from both ends in the longitudinal direction of the substrate portion 36a along the circumferential direction of the peripheral wall portion 1a of the frame. Each of the standing portions 36b shown in the drawing is formed by bending a strip-like portion provided integrally with the substrate portion 36a, and the support shaft 34 is slidably fitted inside each standing portion 36b. A slot S having a dimension that can be formed is formed.

  The slot S provided in the support bracket 36 includes a guide portion S1 extending in the vertical direction, a position adjacent to the upper end of the guide portion S1, and the radial direction (fixed) of the solid material guiding duct 30 from the upper end of the guide portion S1. The shaft fitting holding part (recessed part) S2 provided at a position deviated to the outside of the peripheral wall part 1a of the frame) and a short communication connecting the upper end of the guide part S1 and the shaft fitting holding part S2. It is formed in a substantially inverted L shape having a passage S3.

  The space W ′ between the pair of upright portions 36b, 36b of the support fitting 36 is set to be slightly larger than the width dimension W of the second mounting plate 33 that attaches the support shaft 34 to the duct component 30A. As shown in FIG. 5, both ends of the support shaft 34 are fitted in the slots S, S inside the pair of upright portions 36 b, 36 b, and the second mounting plate 33 that supports the support shaft 34. However, it is arranged between the pair of upright portions 36b, 36b of the support metal fitting 36 so as to be slidable up and down.

  In the present embodiment, the pair of upright portions 36b and 36b of the support metal fitting 36 constitute a positioning portion that positions and holds the duct constituent member 30A in the closed position. The illustrated upright portions 36b and 36b have vertical surfaces 36b1 and 36b1 facing inward in the radial direction of the peripheral wall portion 1a of the fixed frame 1, and a support shaft 34 fixed to the duct component 30A is supported by a support fitting 31A. The vertical surfaces 36b1 and 36b1 are in contact with the outer peripheral surface of the duct component member 30A to position the duct component member 30A in the radial direction when the guide member S1 of the slot S is fitted.

  In the present embodiment, when the duct component 30A is in the closed position and the lower end thereof is in contact with the upper end of the peripheral wall 1a of the fixed frame 1, the support shaft 34 is as shown in FIG. The lower end of the first mounting plate 32 is in contact with the upper end of the mounting plate 35 that attaches the supporting bracket 31A to the peripheral wall portion 1a of the fixed frame. The overhang dimension d of the second mounting plate 33 from the duct constituent member 30A is set so as to be in a state.

  The length of the guide portion S1 of the slot S provided in the support metal 36 is such that when the duct component 30A is in the closed position and the solid material guide duct 30 is configured with other duct components. When the duct constituent member 30A is set to be shorter than the gap formed between the upper end of the duct constituent member 30A and the bottom wall portion 10b of the basket 10 and the duct constituent member 30A in the closed position is displaced upward, the duct Before the upper end of the component member 30A hits the bottom wall portion 10b of the basket 10, the support shaft 34 reaches the upper end of the guide portion S1 of the slot S to restrict the upward displacement of the duct component member 30A. Yes.

  The configuration of the support device 31A supporting the duct component member 30A on the peripheral wall portion 1a of the fixed frame 1 has been described above, but the other duct component members 30B to 30D are supported on the peripheral wall portion 1a of the fixed frame 1 respectively. The supporting devices 31B to 31D are configured in exactly the same way as the supporting device 31A.

  In order to facilitate the operation of displacing (lifting) the duct constituent members 30A to 30D upward, the duct constituent members 30A to 31D are respectively positioned at the positions where the supporting devices 31A to 31D are provided to support the duct constituent members 30A to 30D. U-shaped handles 38A to 38D are attached to the upper part of the outer peripheries of 30A to 30D. The handles 38A to 38D also function as positioning members that contact the outer periphery of the peripheral wall 1a of the fixed frame 1 when the duct components 30A to 30D are in the open position and position the duct components 30A to 30D in the open position. .

  In the present embodiment, the peripheral wall 1a of the fixed frame 1 that aligns with the annular protrusion 10d protruding from the lower surface of the bottom wall of the basket 10 constitutes a solid discharge duct, and the annular protrusion of the basket 10 The solid matter discharged from the solid matter discharge hole inside the portion 10d falls through the inside of the peripheral wall portion 1a into the solid matter collection tank disposed at the lower portion of the fixed frame 1.

  In the present embodiment, when supplying the stock solution into the basket 10 to perform the solid-liquid separation process and when collecting the solid matter generated in the basket 10, the duct components 30A to 30D are shown in FIGS. The solid material guiding duct 30 is configured by the duct constituent members 30A to 30D at the closed position indicated by the solid line in FIG. Further, when the basket 10 and the solid discharge duct 30 are cleaned, the duct constituent members 30A to 30D are moved from the closed position to the open position to open the duct constituent members 30A to 30D, and the cleaning of each part is completed. After that, the duct components 30A to 30D are returned from the open position to the closed position.

  Here, an operation for displacing the duct constituent members 30A to 30D in the closed position to the open position and an operation for returning the duct constituent members in the open position to the closed position will be described taking the duct constituent member 30A as an example. . FIG. 6A shows the state of the support device 31A when the duct component 30A is in the closed position. When the duct component member 30A is in the closed position, the support shaft 34 fixed to the duct component member 30A is in contact with the lower end of the guide portion S1 of the slot S, and the duct component member 30A is a peripheral wall portion of the fixed frame 1 It arrange | positions in the state which stood up at the upper end of 1a. In a state where the support shaft 34 is fitted in the guide portion S1 of the slot S, the vertical surfaces 36b1 and 36b1 of the upright portions 36b and 36b of the support fitting 36 are in contact with the outer peripheral surface of the duct component 30A, and the duct component 30A. Is positioned in the radial direction.

  When the duct component 30A is displaced from this state to the open position, the duct component 30A is lifted by holding the handle 38A, and the support shaft 34 fixed to the duct component 30A is guided to the slot S of the support fitting 31A. It is displaced upward along the part S1. As shown in FIG. 6 (B), when the support shaft 34 is displaced to the upper end of the guide portion S1 of the slot S, the duct component member 30A is pulled forward, and the support shaft 34 is supported as shown in FIG. 6 (C). The shaft 34 is fitted into the recess that forms the shaft fitting holding portion S2, and in this state, the duct component 30A is tilted forward and rotated to the open position.

  When the duct component 30A is in the open position (the duct component 30A is opened), the inner surface of the duct component 30A is exposed to the outside, so that the inner surface of the duct component 30A is cleaned. And confirmation of the cleaning result can be easily performed. Also, since the space below the annular protrusion 10d of the basket 10 and the space below the annular protrusion 10d is opened, the basket is washed (especially, the outside near the bottom wall of the basket) and the result of the washing is confirmed. Can be easily performed. The operation of displacing the duct constituent member 30A to the open position can be performed by a simple operation of lifting the duct constituent member 30A and pulling it forward, so that the basket annular protrusion 10d and the space below it are opened. Therefore, it is possible to shorten the time during which the worker is exposed to the gas generated from the solid matter adhering to the basket or the solid matter guide duct.

  When the duct component member 30A is returned to the closed position after the cleaning operation is finished, the duct component member 30A in the state of being collapsed to the open position as shown in FIG. Then, the lower part of the duct component 30A is pushed toward the annular projecting portion 10d of the basket to move the support shaft 34 to the guide portion S1 through the communication passage S3 of the slot S, and the duct component 30A is moved downward together with the support shaft 34. Displace to. The operation | movement which returns 30 A of duct structural members to a closed position can also be performed in a short time.

  The operation of displacing the other duct constituent members 30B to 30D to the open position and the closed position can be performed in the same manner as described above.

  In the present embodiment, when the duct component members 30A to 30D are in the closed position to form the solid material guide duct 30, in order to increase the mechanical strength of the solid material guide duct, FIG. As shown, a connector 40 that connects adjacent end portions of adjacent duct constituent members is provided. FIG. 7 shows the configuration of the connector 40 used in the present embodiment, and FIGS. 8A to 8C show the configuration of the portion A of FIG. 2 where the connector 40 is provided.

  Each of the connecting fittings 40 is disposed over the adjacent circumferential end portions of the two adjacent duct constituent members when the duct constituent members 30A to 30D are disposed at the closed position, and The adjacent circumferential ends of the duct constituent members are connected.

  As shown in FIG. 7, the connector 40 used in the present embodiment has a reverse U-shaped cross section, and is composed of a metal fitting curved along the circumferential direction of the duct component member. It is comprised so that it can fit from the upper part to the upper part of the circumferential direction edge part which the duct structural members 30A thru | or 30D adjoin. The connection tool 40 is provided in a state of being fixed to one of adjacent circumferential end portions of two duct constituent members to be connected by welding or the like. Tapered surfaces 40a and 40a are formed in the opening of the connector 40 to facilitate fitting of the duct constituent members.

  In order not to prevent the displacement from the closed position to the open position and the displacement from the open position to the closed position of the duct components 30 </ b> A to 30 </ b> D, each connector 40 is a series of ducts constituting the solid material guiding duct 30. The duct constituent member fixed by welding or the like to the upper portion of the circumferential end of a specific duct constituent member selected from among the constituent members 30A to 30D is changed from the open position to the closed position. When returned, the fittings 40 are fitted from above into the upper part of the circumferential end of the duct component member that is already placed in the closed position, out of the two duct component members to be connected. Yes.

  The duct component member that fixes the connecting fitting 40 is selected so as not to prevent the displacement of each duct component member to the closed position and the open position. For example, in the case where the solid material guiding duct 30 is divided into four duct constituent members 30A to 30D as in the present embodiment, a pair of duct structures arranged at every other position (in opposite positions). The connection tool 40 is fixed to the upper portions of both ends in the circumferential direction of the members 30B and 30D, and the connection portion 40 is not fixed to both ends of the other duct constituent members 30A and 30C. In this case, when the series of duct constituent members are returned to the closed position to form the solid material guiding duct 30, the duct constituent members 30A and 30C to which the connector 40 is not fixed are first displaced to the closed position. Keep it. The duct components 30A and 30C to which the connector 40 is not fixed are displaced to the closed position, and then the duct component 30B to which the connector 40 is fixed at both ends are displaced to the closed position. In the process of displacing the member 30B downward toward the closed position, as shown in FIG. 8C, the ducts 40 that are fixed at both ends of the duct component 30B are already placed in the closed position. It is made to fit in the upper part of one circumferential direction edge part of 30 A and 30C of structural members. Similarly, in the process of performing an operation of displacing another duct component 30D having the connector 40 fixed at both ends to the closed position and displacing the duct component 30D downward toward the closed position, The connector 40 fixed to both ends of the member 30D is fitted to the upper part of the other circumferential end of the duct constituent members 30A and 30C that are already arranged at the closed position.

  The dimension a (see FIG. 8A) of each connector 40 measured in the circumferential direction of the solid material guiding duct 30 is fixed to the specific duct constituent members 30B and 30D when the duct constituent members 30A to 30D are in the open position. Each connecting tool 40 is set to a size necessary for connecting adjacent duct constituent members within a range in which they do not interfere with the circumferential ends of the other duct constituent members 30A and 30C. Also, during the period from when the specific duct constituent members 30B and 30D are lifted and the support shaft 34 fixed to these duct constituent members is displaced to the upper end of the guide portion S1 of the slot S of the support fitting of the support devices 31B and 31D. The connecting fittings 40 measured in the axial direction of the solid material guiding duct 30 so that the connecting members 40 fixed to the duct constituent members 30B and 30D are detached from the circumferential ends of the other duct constituent members 30A and 30C. The dimensions are set.

  As described above, when the duct constituent members 30A to 30D constituting the solid matter discharge duct 30 are in the closed position, the duct constituent members 30A to 30D are arranged so as to straddle over the adjacent circumferential end portions of the adjacent duct constituent members. If the coupling tool 40 which connects between the circumferential direction edge parts which adjoin a duct structural member is provided, the mechanical strength of the duct 30 for solid-object guides can be raised. Since the connector 40 is fixed to any one of the duct constituent members, there is no possibility that the connector 40 falls into the solid material collection tank through the inside of the peripheral wall portion 1a of the fixed frame 1.

  When performing the solid-liquid separation process using the centrifuge of this embodiment, the duct-forming member 30A to 30D is positioned in the closed position, and the solid material guiding duct 30 surrounding the annular protrusion 10d of the basket 10 is configured. In this state, the stock solution is supplied into the basket 10 rotating at a high speed, and the solid solution is separated from the solid portion by the centrifugal force generated by the rotation of the basket 10. After the liquid component is discharged to the space between the basket 10 and the basket cover 20 through the filter disposed on the inner periphery of the peripheral wall portion 10a of the basket 10 and the numerous permeation holes provided in the peripheral wall portion 10a, The liquid drops in a liquid collecting groove portion 1c formed between the upper portion of the peripheral wall portion 1a of the fixed frame 1 and the overhang portion 1b. The liquid component dropped into the liquid component collecting groove 1c is discharged to the outside through a drain port (not shown). The solid matter accumulates on the inner periphery of the filter disposed on the inner periphery of the basket 10. When a predetermined amount of solid matter is generated in the basket, the supply of the stock solution into the basket 10 is stopped, and the basket is rotated at a high speed for a certain period of time so as to drain the solid matter.

After the liquid removal from the solid material is completed, a cleaning process is performed in which the cleaning liquid is supplied into the basket 10 and the solid material is cleaned. After washing of the solid matter is completed and the cleaning liquid contained in the solid matter is released by rotation of the basket, the basket 10 is decelerated and the solid matter generated on the inner periphery of the basket 10 is scraped off by the solid matter scraping device. The solid matter scraped off is dropped downward from the solid matter discharge hole inside the annular projecting portion 10 d provided on the bottom wall portion of the basket 10, and is placed in the solid matter collecting tank disposed at the lower portion of the fixed frame 1. to recover.

  After the solid-liquid separation process for one lot is completed and the solid matter generated in the basket 10 is collected, the basket 10 is cleaned by supplying a cleaning liquid into the basket 10 while rotating the basket 10. After washing the basket in this way, the basket 10 is stopped, the basket cover 20 is opened, and the liquid content recovery provided on the outer surface of the basket 10, the inner surface of the basket cover 20, and the upper portion of the fixed frame 1 is performed. The inside of the groove 1c is cleaned. Further, by displacing the duct constituent members 30A to 30D to the open position, the annular projecting portion 10d of the basket 10 and the space below it are opened, and the inner surfaces of the duct constituent members 30A to 30D can be visually observed from the outside. To do. In this state, the cleaning liquid is sprayed on the lower surface of the basket 10, the inner surfaces of the duct constituent members 30A to 30d, the inner surface of the peripheral wall portion 1a of the fixed frame 1, and the like. After the cleaning of each part is completed and the cleaning result is confirmed, the duct constituent members 30A to 30D are returned to the closed position to form the solid material guiding duct 30, and the basket cover 20 is returned to the closed position to return to the next fixed member. Prepare for liquid separation.

  In the above embodiment, the solid material guiding duct 30 is divided into four parts, but the number of divided solid material guiding ducts 30 is not limited to four. For example, the solid material guiding duct 30 may be divided into three duct constituent members. When the solid material guiding duct 30 is divided into three duct constituent members, the coupling tool 40 is fixed to both ends in the circumferential direction of one of the three duct constituent members, and the other two The connecting tool 40 that connects the adjacent circumferential end portions of the duct constituent members is fixed to one of the other two duct constituent members.

  In the above embodiment, one support shaft and one support metal fitting are provided for each duct component member, but a plurality of support shafts and support metal fittings may be provided for each duct component member.

  In said embodiment, although the handle 38A-38D is provided in the center part of each circumferential direction of the duct structural member 30A-30D, the handle 38A-38D is provided in the position which is easy to handle the duct structural member 30A-30D. The handle attachment position is not limited to the position shown in the above embodiment.

DESCRIPTION OF SYMBOLS 1 Fixed frame 1a Peripheral wall part 1c Liquid part collection | recovery groove part 1d Rotating shaft holding part 2 Rotating shaft 3 Bearing 4 Cover plate 7 Bearing device 10 Basket 10a Peripheral wall part 10b Bottom wall part 10c Boss part 10d Annular protrusion part 10e Solid matter discharge hole 20 Basket cover 30 Solid material guide ducts 30A to 30D Duct components 31A to 31D Support device 32 First mounting plate 33 Second mounting plate 34 Support shaft 35 Mounting plate 36 Support metal fitting 36a Substrate portion 36b Standing portion (positioning holding portion) )
38A to 38D Handle 40 Connecting tool S Slot S1 Guide part S2 Shaft fitting holding part S3 Connection passage

Claims (4)

A peripheral wall portion arranged with the axis line directed in the vertical direction, a bottom wall portion closing the lower end of the peripheral wall portion, a boss portion fixed to the center portion of the bottom wall portion, and a lower surface of the bottom wall portion. A basket having an annular protrusion that concentrically surrounds the boss and having a solid material discharge hole formed between the annular protrusion and the boss, and a bearing device provided on the fixed frame, is rotatably supported. A rotating shaft whose upper end is coupled to the boss portion of the basket, and a cylindrical solid material guiding duct that is attached to the fixed frame and concentrically surrounds a part of the annular protrusion of the basket from the outside, In a centrifuge provided with a rotation drive device for driving the rotation shaft,
The solid material guiding duct is divided into a plurality of duct components arranged along the circumferential direction of the annular protrusion of the basket,
Each of the duct constituent members is arranged in a state of being arranged around the annular projecting portion of the basket by the support device, and the annular position where the solid material guiding duct is configured together with the other duct constituent members, and the annular The fixing is performed so that it can be displaced between the open position where the annular protrusion is opened from the state surrounded by the solid material guiding duct, being arranged in a state of being inclined obliquely in a direction away from the protrusion. Supported by the frame,
A support device for supporting each duct component member is provided so as to extend in a tangential direction of a circle constituting a contour line of a cross section of the solid material guide duct, and is supported on an outer peripheral portion of each duct component member. And a support fitting fixed to the fixed frame having a slot into which the support shaft is fitted,
The slot provided in the support metal fitting includes a guide portion extending in the vertical direction, a shaft fitting holding portion provided at a position offset outward in the radial direction of the duct from the upper end of the guide portion, and the guide portion. Formed in a shape having a communication passage communicating between the upper end of the shaft and the shaft fitting holding portion,
Each duct constituent member arranged in the closed position is lifted and the support shaft fixed to each duct constituent member is displaced along the guide portion of the slot of the corresponding support fitting to the upper end of the guide portion, and then each duct When the component member is displaced in a direction away from the annular projecting portion of the basket, the support shaft is fitted into the shaft fitting holding portion of the slot of the corresponding support fitting, and each duct component member is directed to the open position. A centrifuge characterized by being configured to be able to rotate. Positioning in which each duct component member is positioned radially in contact with the outer peripheral surface of each duct component member when the support shaft fixed to each duct component member is fitted in the guide portion of the slot of the corresponding support fitting Part is provided on each support bracket,
The centrifuge according to claim 1. When the plurality of duct constituent members are arranged at the closed position, the adjacent duct constituent members are arranged to straddle the adjacent circumferential end portions of the adjacent duct constituent members. A connecting tool for connecting the two is fixed to one upper part of adjacent circumferential end portions of adjacent duct constituent members,
Each connector has a circumferential end portion of another duct component adjacent to the duct component to which each connector is fixed when the duct component to which the connector is fixed is returned from the open position to the closed position. It is configured to be connected to the upper end of the duct from above and to connect the circumferential end of the duct component to which each connector is fixed and the circumferential end of another adjacent duct component. The centrifuge according to claim 1 or 2, characterized by the above.   A handle used when lifting each duct component is attached to the outer periphery of each duct component, and when each duct component is rotated to the open position, the handle comes into contact with the fixed frame and each duct component is The centrifuge according to claim 1, 2, or 3, wherein the centrifugal separator is configured to be positioned at an open position.

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