JP2007090237A - Solid-liquid separator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid-liquid separator comprising a plurality of fixing rings disposed while being spaced apart from each other by a plurality of spacers, a movable ring disposed between adjacent fixing rings, a screw extending through the inside of the fixing rings and the movable ring, and a motor for rotating and driving the screw, and preventing the movable ring from slipping out from a space between the adjacent fixing rings by the plurality of spacers, the solid-liquid separator decreasing resistance applied to the movable ring to reduce abrasive wear on the inner peripheral surface of the movable ring. <P>SOLUTION: The solid-liquid separator is configured so that an outer diameter D<SB>2</SB>of the fixing ring 28 is made smaller than a diameter D<SB>1</SB>of a circle CC being in contact with a center side portion of the fixing ring of the plurality of spacers 38. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention includes a plurality of fixed rings spaced from each other, a movable ring disposed between adjacent fixed rings, and a screw extending inside the fixed ring and the movable ring. The present invention relates to a solid-liquid separation device in which an inner diameter is set smaller than an outer diameter of a screw.

  Processing objects containing liquids, for example, waste tofu, food processing wastewater, organic sewage such as wastewater treated or wastewater discharged from pig farms, cutting oil containing cutting waste, plating waste liquid, ink waste liquid, pigment waste liquid, paint In order to separate liquid from inorganic sludge such as waste liquid, or processing objects such as vegetable scraps and fruit peels, food residues, okara, etc., it has been conventionally known to use a solid-liquid separation device of the above type ( For example, see Patent Document 1). According to this type of solid-liquid separation device, the object to be processed that has flowed from the inlet opening on one end side in the axial direction of the cylindrical body formed by the plurality of fixed rings and the plurality of movable rings is formed into a cylindrical shape by a rotating screw. Move toward the outlet opening at the other end in the axial direction of the body, and discharge the liquid separated from the processing object moving in the cylindrical body out of the cylindrical body through a micro gap between the fixed ring and the movable ring, The object to be processed with the reduced liquid content can be discharged from the outlet opening on the other axial end side of the cylindrical body.

  At that time, since the inner diameter of the movable ring is set to be smaller than the outer diameter of the screw, the screw pushes the movable ring in the radial direction by its rotation, and positively moves the movable ring with respect to the fixed ring. Can exercise. For this reason, it is possible to efficiently discharge the solid matter that has entered the minute gap between the fixed ring and the movable ring without providing a dedicated driving device for driving the movable ring, and to prevent clogging of the minute gap. Can do. Thus, this type of solid-liquid separation device has a self-cleaning function that automatically discharges solid matter that has entered between the fixed ring and the movable ring.

  However, depending on the type of the object to be processed, the movement of the movable ring becomes dull and there is a possibility that a sufficient self-cleaning function cannot be obtained. Further, since the movable ring is a member that is pushed and moved by the rotating screw, it is inevitable that the inner peripheral surface of the movable ring is worn. Therefore, depending on the object to be processed, there is an unavoidable risk that the movable ring will have an early life and the maintenance cost of the solid-liquid separator will be high.

JP-A-5-228695

  An object of the present invention is to provide a solid-liquid separation device capable of effectively suppressing the above-described conventional drawbacks.

In order to achieve the above object, the present invention provides a plurality of fixed rings arranged at intervals, a movable ring disposed between adjacent fixed rings, and the movable ring between adjacent fixed rings. A plurality of disengagement preventing means for preventing the disengagement; a screw extending inside the fixed ring and the movable ring; and a drive means for rotationally driving the screw; The diameter of the circle in contact with the part is D ₁ , the outer diameter of the fixed ring is D ₂ , the inner diameter of the fixed ring is D ₃ , the outer diameter of the movable ring is D ₄ , the inner diameter of the movable ring is D ₅ , and the screw when the outer diameter is _{D 6, D 1> D 2} , D 1> D 4, D 3> D 6, D 4> D 3, D 6> D 5 the size of the diameter so as to satisfy each Set solid-liquid content Suggest apparatus (claim 1).

  Further, in the solid-liquid separation device according to claim 1, it is advantageous that the separation preventing means comprises a spacer disposed between adjacent fixing rings (claim 2).

  Furthermore, in the solid-liquid separator according to claim 2, at least one spacer among a plurality of spacers arranged between adjacent fixing rings is formed integrally with one of the adjacent fixing rings. (Claim 3).

  Further, in the solid-liquid separation device according to claim 1, it is advantageous that the separation preventing means comprises a connecting member for fixing a plurality of fixing rings (claim 4).

  According to the present invention, the outer diameter of the fixing ring is set to be smaller than the diameter of the circle in contact with the fixing ring center side portion of the plurality of separation preventing means, so that the adjacent fixing ring and the movable ring overlap each other. The area becomes smaller than before, and this reduces the resistance acting on the movable ring. For this reason, the movable ring can be efficiently moved by the rotating screw, and the self-cleaning function can be enhanced. In addition, since the movable ring becomes easy to move, the force that the inner peripheral surface of the movable ring receives from the screw can be reduced, thereby suppressing the wear of the inner peripheral surface of the movable ring and extending its life. The maintenance cost of the apparatus can be reduced. Furthermore, since the area of the portion where the adjacent fixed ring and the movable ring overlap with each other is reduced, the filtrate can easily escape from between the fixed ring and the movable ring, thereby improving the liquid removal efficiency for the object to be processed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, and the conventional drawbacks described above will be clarified more specifically with reference to the drawings.

  FIG. 1 is a partial cross-sectional front view showing an example of a solid-liquid separator. Various processing objects can be solid-liquid separated by this solid-liquid separator, but here, a case where a sludge containing a large amount of moisture is dehydrated will be described.

  The solid-liquid separation device shown here has an inlet member 1, an outlet member 2, and a cylindrical body 3 disposed between them, and the inlet member 1 is formed in a rectangular box shape with an open top. The inflow port 4 into which sludge flows is formed by the upper opening formed. Reference numeral 7 denotes a bottom wall of the inlet member 1. An opening 6 is formed in the side wall 5 of the inlet member 1 on the side facing the cylindrical body 3, and a cross section is formed in a rectangular shape on the other side wall 8 facing the side wall 5 of the inlet member 1. One side wall 10 of the motor support member 9 is fixed by bolts and nuts, and a motor 12 with a speed reducer is fixed to the other side wall 11 of the motor support member 9.

  Both side walls 5 and 8 of the inlet member 1 extend downward, and lower ends thereof are detachably fixed to the stays 13 and 14 of the support frame by bolts and nuts (not shown). 11 also extends downward, and its lower end is detachably fixed to the stay 14 of the support frame by bolts and nuts (not shown).

  The outlet member 2 has an opening at the top and bottom and a rectangular horizontal cross section. The side wall 19 of the outlet member 2 facing the cylindrical body 3 and the side wall of the outlet member 2 facing the outlet member 2 are disposed. 20 is formed with openings 22 and 23, respectively. The side walls 19 and 20 extend downward, and their lower ends are detachably fixed to the stays 52 and 53 of the support frame by bolts and nuts (not shown). A bearing plate 18 is disposed in the opening 23 formed in the side wall 20, and the bearing plate 18 is detachably fixed to the side wall 20 by bolts 24 and nuts 25. The lower opening of the outlet member 2 constitutes a discharge port 26 through which the dewatered sludge is discharged.

  On the other hand, the cylindrical body 3 is movable between a plurality of fixed rings 28 spaced apart from each other in the axial direction by a plurality of small ring-shaped spacers 38 and a fixed ring 28 adjacent in the axial direction. The ring 29 is constituted. FIG. 2 is an exploded perspective view showing the appearance of two adjacent fixed rings 28, a movable ring 29 disposed between the fixed rings 28, and a spacer 38. FIG. FIG. The plurality of fixing rings 28 are arranged concentrically as shown in FIGS. 1 to 3, and four spacers 38 are arranged between the fixing rings 28 adjacent in the axial direction. As shown in FIG. 1, the cylindrical body 3 is disposed so as to be inclined so that the outlet member 2 side becomes higher.

  In the illustrated solid-liquid separation device, as shown in FIGS. 2 and 3, each fixing ring 28 is formed with four ears 39 protruding in the radial direction and arranged in the circumferential direction thereof. A mounting hole 32 is formed in each ear 39. A stay bolt 34, which is an example of a connecting member, passes through each mounting hole 32 formed in each ear 39 and the center hole of each spacer 38 disposed between the fixing rings 28 adjacent in the axial direction. Further, as shown in FIG. 1, each stay bolt 34 passes through the side wall 5 of the inlet member 1 and the side wall 19 of the outlet member 2, and is fitted with nuts 36, 36 </ b> A on male threads formed at respective end portions thereof. Are respectively screwed and tightened. In FIG. 1, illustration of some of the stay bolts and spacers is omitted for easy understanding of the drawing.

  As described above, the plurality of fixing rings 28 are integrally fixedly connected to each other by the plurality of stay bolts 34 and the nuts 36 and 36 </ b> A, and are fixed to the inlet member 1 and the outlet member 2. The stay bolt 34, which is an example of a connecting member, extends through the plurality of fixing rings 28, and serves to connect the plurality of fixing rings 28. An elongated member other than the stay bolt, for example, a connecting member made of a connecting rod or the like can also be used. A plurality of such connecting members are provided. It is also possible to assemble the fixing rings, which are spaced from each other by spacers, so that they can be slightly moved.

  As shown in FIG. 3, the thickness T of each movable ring 29 arranged between each fixed ring 28 is set to be smaller than the gap width G between each fixed ring. A minute gap g of, for example, about 0.1 mm to 1 mm is formed between the end faces of the movable ring 29 facing the surface. As will be described later, the minute gap g allows moisture separated from the sludge, that is, the filtrate to pass therethrough. The thickness T of the movable ring 29 is set to about 1.0 mm to 2 mm, for example, and the gap width G is set to about 2 mm to 3 mm, for example. The thickness t of the fixing ring 28 is set to about 1.5 mm to 3 mm, for example. The sizes of the gap g, the thicknesses T and t, and the gap width G are appropriately set in consideration of the type of processing object.

FIG. 4 is an explanatory view showing an arrangement state of the fixed ring 28, the movable ring 29, the spacer 38 arranged between the adjacent fixed rings 28, and the stay bolt 34. In this figure, the movable ring 29 is shown by a broken line. It is shown by. Here, when the interval between two spacers 38 adjacent to each other in the circumferential direction of the fixed ring 28 is L, this interval L is larger than the outer diameter D ₄ of the movable ring 29 as is apparent from FIG. It has become smaller (L <D ₄ ). For this reason, the movable ring 29 is prevented from coming out between the adjacent fixed rings 28. As described above, each spacer 38 constitutes an example of a separation preventing unit that prevents the movable ring 29 from separating from between the fixed rings. The solid-liquid separator has a plurality of detachment preventing means for preventing the movable ring 29 from coming out between the adjacent fixed rings 28.

Further, as shown in FIG. 2, when considering the circle CC in contact with the fixing ring center side portion of the plurality of the detachment preventing means consisting of spacer 38, the outer diameter D ₄ of the movable ring 29, the circle CC diameter D less than _1, yet the outer diameter _{D 4} of the movable ring 29 is set larger than the inner diameter _{D 3} of the fixed ring _{28 (D 1> D 4,} D 4> D 3). Thus, each movable ring 29 is held between the adjacent fixed rings 28 that are movable in the radial direction of the movable ring 29 and are rotatable without coming out of the center hole of each fixed ring 28.

  A screw 21 extending in the axial direction of the rings 28 and 29 is disposed inside the plurality of fixed rings 28 and the plurality of movable rings 29. The screw 21 has a shaft portion 41 and a spiral integral therewith. The blade portion 42 has a shape. As shown in FIG. 1, the screw 21 extends through the openings 6, 22, and 23 formed in the side wall 5 of the inlet member 1 and the side walls 19 and 20 of the outlet member 2.

  As shown in FIG. 1, the bearing plate 18 has a bearing cup 44 in which the bearing 43 is accommodated, and one end of the shaft portion 41 of the screw 21 is inserted into the bearing cup 44. The bearing plate 18 is rotatably supported via the bearing 43.

  On the other hand, the output shaft 45 of the motor 12 shown in FIG. 1 extends through the side walls 11 and 10 of the motor support member 9 and the side wall 8 of the inlet member 1 and is rotatably supported by the side wall 10 via a bearing. ing. As shown in FIG. 5, the distal end portion of the output shaft 45 is hollow inside, and the engagement piece 50 is fixedly disposed at the center of the hollow portion 49. Further, an engagement groove 51 is formed at the other end of the shaft portion 41 of the screw 21, and the end portion of the shaft portion 41 is inserted into the hollow portion 49 of the output shaft 45 as shown in FIG. An engagement groove 51 formed in 41 is engaged with an engagement piece 50 provided on the output shaft 45.

  When the motor 12 operates and the output shaft 45 rotates, the rotation is transmitted to the screw 21 via the engaging piece 50 and the engaging groove 51 engaged with each other, and the screw 21 rotates around its central axis. To do. As described above, in the solid-liquid separation device of this example, the motor 12 with the speed reducer and the output shaft 45 constitute drive means for rotationally driving the screw 21, but other appropriate forms of drive. Means can also be employed.

  Next, the operation of the solid-liquid separator of this example will be described.

  Sludge in a service tank (not shown) located below the cylindrical body 3 is supplied to a flocking device (not shown), and the flocculant is mixed and stirred with sludge containing a large amount of water. As a result, the sludge is flocked. Flocked sludge (not shown in the figure) flows into the inlet member 1 of the solid-liquid separator as indicated by an arrow A in FIG. The moisture content of such sludge is, for example, about 99% by weight. At this time, since the screw 21 is rotationally driven by the motor 12, the sludge that has flowed into the inlet member 1 passes through the opening 6 formed in the side wall 5 of the inlet member 1, as indicated by the arrow B, and the fixing ring. 28 and the movable ring 29, that is, the inner space of the cylindrical body 3 flows from the inlet opening 3 </ b> A on one end side in the axial direction.

  The sludge that has flowed into the cylindrical body 3 as described above is conveyed toward the outlet opening 3 </ b> B on the other axial end side of the cylindrical body 3 by the screw 21 that is rotationally driven by the motor 12. At this time, the water separated from the sludge, that is, the filtrate is discharged out of the cylindrical body through the minute gap g (FIG. 3) between each fixed ring 28 and the movable ring 29. The discharged filtrate is received by the filtrate receiving member 40 fixed to the stays 13 and 52, and then flows down through the filtrate discharge pipe 46. Since this filtrate still contains some solids, the filtrate is treated again with other sludge and then supplied to a solid-liquid separator for dehydration.

Here, as shown in FIGS. 3 and 4, the outer diameter D ₆ of the screw 21 is set slightly smaller becomes the size than the rotation so is not inhibited, the inner diameter D ₃ of the fixed ring 28 ( D ₃ > D ₆ ), the outer diameter D ₆ of the screw 21 is set larger than the inner diameter D ₅ of the movable ring 29. Is the inner diameter _{D 5} of the movable ring 29 is set smaller than the outer diameter _{D 6} of the screw _{21 (D 6> D 5)} . For this reason, by the rotation of the screw 21, each movable ring 29 receives an external force from the screw 21 and is pushed in the radial direction to positively move with respect to the fixed ring 28. In this manner, the solid matter that has entered the minute gap g can be positively discharged without providing a dedicated driving means for driving the movable ring 29, and the cleaning efficiency for the gap g can be enhanced. This is the self-cleaning function.

  As described above, the moisture content of the sludge in the cylindrical body 3 is lowered, and the sludge having a reduced water content is discharged from the outlet opening 3B on the other axial end side of the cylindrical body 3. As shown by an arrow D in FIG. 1, the sludge discharged from the cylindrical body 3 moves into the outlet member 2 through the opening 22 of the outlet member 2, and falls downward through the outlet 26 below.

  The water content of the sludge after the dehydration treatment as described above is, for example, about 80 to 85% by weight. As shown in FIG. 1, a back pressure plate 47 is fixed to the shaft portion 41 so as to face the opening 22 formed on one side wall of the outlet member 2, and is thereby added to the sludge in the cylindrical body 3. The pressure can be increased.

FIG. 9 is an explanatory view similar to FIG. 4 showing the positional relationship among the fixed ring 28, the movable ring 29, the spacer 38, and the stay bolt 34 in the conventional solid-liquid separator. As seen from this figure, in the conventional solid-liquid separator has an outside diameter D ₂ of the fixing ring 28 is set larger. More specifically, the outside diameter D ₂ of the fixed ring 28, is had been set equal to the diameter D ₁ of the circle CC in contact with the fixing ring center side portion of the plurality of spacers 38. However, in this way a large outer diameter D ₂ of the fixed ring 28, the area of a portion fixing ring 28 and the movable ring 29 adjacent overlap each other inevitably large. That is, in FIG. 9, when the adjacent fixed ring 28 and movable ring 29 are viewed in the axial direction, the portions where these rings 28 and 29 overlap each other are hatched. The area of the part is considerably large. During the operation of the solid-liquid separator, there is filtrate and solid content in the minute gap between the fixed ring 28 and the movable ring 29. Therefore, if the area of the overlapping part of the fixed ring 28 and the movable ring 29 is large, the solid ring is rotated. When the movable ring 29 is pushed and moved by the screw, a large resistance acts on the movable ring 29, and the movement becomes slow. For this reason, as described above, the self-cleaning function of the solid-liquid separation device is lowered, the contact pressure between the screw 21 and the inner peripheral surface of the movable ring 29 is increased, and the wear of the movable ring 29 is promoted. I can't escape fear.

Therefore, in the solid-liquid separation device of this example, as shown in FIG. 4, the outer diameter D ₂ of the fixing ring 28 is set smaller than the diameter D ₁ of the aforementioned circle CC (D ₁ > D ₂ ). . Also in FIG. 4, when the adjacent fixed ring 28 and movable ring 29 are viewed in the axial direction, hatched portions are attached to portions where these rings 28, 29 overlap each other. by setting the D ₂ as described above, the area of the hatched portions (hereinafter, overlap of area) becomes small as the much than the overlap area shown in FIG. In the conventional solid-liquid separator shown in FIG. 9, the widths X1 and X2 of the overlapping portion of the fixed ring 28 and the movable ring 29 are, for example, 12 mm and 5 mm, respectively, whereas FIG. In the solid-liquid separator, the widths X1 and X2 of the overlapping portions of the rings 28 and 29 are each 4 mm, for example.

As described above, by reducing the overlap area between the fixed ring 28 and the movable ring 29, it is possible to reduce the resistance acting on the movable ring 29 during the operation of the solid-liquid separator. For this reason, the movable ring 29 can be efficiently pushed and moved by the screw 21, and the self-cleaning function can be enhanced. Moreover, since the movable ring 29 is easy to move, the contact pressure between the inner peripheral surface of the movable ring and the screw 21 is reduced, and the force received by the inner peripheral surface of the movable ring from the screw 21 is reduced. Thereby, abrasion of the inner peripheral surface of the movable ring 29 can be suppressed, its life can be extended, and the maintenance cost of the solid-liquid separator can be reduced. Further, since the overlap area between the adjacent fixed ring 28 and the movable ring 29 is small, the filtrate can easily escape from between the fixed ring 28 and the movable ring 29, and the efficiency of dewatering sludge can be increased. Further, since the outer diameter D ₂ is smaller retainer ring 28, it is possible to reduce the size of the fixing ring. Thus, the fixing ring 28 can be reduced in weight, and the manufacturing cost can be reduced.

As described above, the solid-liquid separation device of this example is provided with a plurality of detachment prevention means, and the diameter of the circle CC in contact with the fixed ring center side portion of the plurality of detachment prevention means is fixed to D ₁ . When the outer diameter of the ring 28 is D ₂ , the inner diameter of the fixed ring is D ₃ , the outer diameter of the movable ring 29 is D ₄ , the inner diameter of the movable ring is D ₅ , and the outer diameter of the screw 21 is D _{6. 1> D 2, D 1>} D 4, D 3> D 6, D 4> D 3, D 6> D 5 the size of the diameter so as to satisfy each of which is set. Thereby, the resistance which acts on the movable ring 29 at the time of operation | movement of a solid-liquid separator is suppressed, and an efficient self-cleaning function can be achieved.

The fixed ring 28 of the present embodiment, although a plurality of ears 39, in the case of such a fixed ring 28, the outer diameter of the outer diameter D ₂ is annular portions other than these ears 39 It is.

  In the specific example described above, the detachment preventing means is composed of the spacer 38 disposed between the adjacent fixing rings 28, but at least one of the plurality of spacers 38 disposed between the adjacent fixing rings 28. The two spacers 38 may be formed integrally with any one of the adjacent fixing rings 28. FIG. 6 shows an example in which all the spacers 38 are formed integrally with the fixing ring 28, and the fixing ring 28 and the spacer 38 are configured as one component.

  In order to integrally form the fixing ring and the spacer, for example, when the fixing ring 28 and the spacer are both made of metal, they can be integrated by welding or can be integrally formed by casting. Alternatively, the fixing ring 28 and the spacer integrated with each other can be manufactured by cutting the material. Further, when both the fixing ring 28 and the spacer are made of resin, they can be manufactured as an integral molded product by a molding die. It is also possible to bond the fixing ring and the spacer with an adhesive.

In the solid-liquid separator shown in FIGS. 7 and 8, the spacer 38 is not fitted to each stay bolt 34 fitted to the mounting hole 32 formed in the ear 39 of each fixing ring 28. Moreover, the interval L1 between the circumferentially adjacent two stays bolts 34 of the fixing ring 28 is set smaller than the outer diameter D ₂ of the fixing ring 28, whereby the fixing ring 28 that the movable ring 29 is adjacent It is prevented from leaving. As described above, in the solid-liquid separator shown in FIGS. 7 and 8, the disengagement preventing means for preventing the movable ring 29 from slipping out between the adjacent fixing rings 28 is a stay for fixing the plurality of fixing rings 28. The connecting member is formed of a bolt 34. Moreover the outer diameter D ₂ of the fixing ring 28 is set smaller than the diameter D ₁ of the circle CC in contact with the fixing ring center side portion of the plurality of stay bolts _{34 (D 1> D 2)} .

  Further, in the solid-liquid separation device shown in FIGS. 7 and 8, each fixing ring 28 is provided with a plurality of ears 39 </ b> A in addition to the above-mentioned ears 39, and each of the ears of adjacent fixing rings 28. The spacers 38 are respectively arranged between the portions 39A, the adjacent fixing rings 28 are spaced apart from each other in the axial direction by the spacers 38, and the movable ring 29 is arranged between the fixing rings 28. ing. At that time, each spacer 38 is located outward from a circle CC in contact with a portion of the plurality of stay bolts 34 on the center side of the fixing ring. As a result, the movable ring 29 does not contact the spacers 38. Thus, the spacer 38 of this example does not function as a separation preventing means for preventing the movable ring 29 from separating from between the adjacent fixed rings 28. It is preferable that the spacers 38 are integrally formed on either one of the adjacent fixing rings 28 in the manner described above so that the spacers 38 do not leave between the adjacent fixing rings 28. Further, the fixed ring center side portion of the spacer 38 is arranged so as to contact the circle CC, and the stay ring 34 and the spacer 38 prevent the movable ring 29 from being separated from between the adjacent fixed rings 28. It is also possible to constitute a detachment preventing means.

  The other configuration of the solid-liquid separation device shown in FIGS. 7 and 8 is the same as that of the solid-liquid separation device shown in FIGS. 1 to 6, and the operation thereof is not substantially different. Therefore, in FIGS. 7 and 8, the same or corresponding parts as those of the solid-liquid separation apparatus described above are denoted by the same reference numerals as those shown in FIGS. 3 and 4, and the same parts are described. Omitted.

  In the solid-liquid separation device having each configuration described above, one movable ring 29 is arranged between the fixing rings 28 adjacent in the axial direction. Of course, the movable ring 29 may be arranged. At least one movable ring is disposed between two adjacent fixed rings. Similarly, the screw 21 of the illustrated solid-liquid separation device has one blade portion 42 extending in a spiral shape, but it is also possible to use a screw having a plurality of blade portions extending in a spiral shape. is there. The screw has at least one blade. Furthermore, the fixed ring 28, the movable ring 29, and the screw 21 can be made of metal such as stainless steel. However, if at least a part of them is made of resin, the cost can be reduced and each of the components can be reduced. The weight of the element can be reduced.

It is a partial cross section front view of a solid-liquid separator. It is a disassembled perspective view of the solid-liquid separator which shows an adjacent fixed ring and the movable ring etc. which were arrange | positioned between the both fixed rings. It is a longitudinal cross-sectional view of a cylindrical body. It is explanatory drawing which shows the arrangement | positioning state of a fixed ring, a movable ring, a spacer, and a stay bolt. It is a perspective view which shows the structure regarding the connection of the output shaft and the axial part of a screw. It is a figure which shows the fixing ring and the spacer integrated with the fixing ring. FIG. 4 is a cross-sectional view similar to FIG. 3, showing an example in which the detachment prevention means is constituted by a stay bolt. It is explanatory drawing which shows the arrangement | positioning state of the fixed ring of the solid-liquid separator shown in FIG. 7, a movable ring, a spacer, and a stay bolt. It is explanatory drawing which shows the arrangement | positioning state of the fixed ring of the conventional solid-liquid separator, a movable ring, a spacer, and a stay bolt.

Explanation of symbols

21 Screw 28 Fixed ring 29 Movable ring 38 Spacer CC circle

Claims (4)

A plurality of fixed rings spaced apart from each other, a movable ring disposed between adjacent fixed rings, and a plurality of detachment preventing means for preventing the movable ring from coming out between adjacent fixed rings; A screw extending through the fixed ring and the movable ring, and a driving means for rotationally driving the screw, and a diameter of a circle in contact with a fixed ring central side portion of the plurality of detachment preventing means is D ₁ , the outer diameter of the fixing ring D _2, inner diameter D ₃ of the fixed _ring, the outer diameter D ₄ of the movable _ring, D ₅ and the inner diameter of the movable _ring, when the outer diameter of the screw was set to D _6, D _{1> D 2, D 1>} D 4, D 3> D 6, D 4> D 3, D 6> D 5 size is set and solid-liquid separator of the diameter to satisfy respectively. The solid-liquid separator according to claim 1, wherein the detachment preventing unit includes a spacer disposed between adjacent fixing rings. The solid-liquid separator according to claim 2, wherein at least one of a plurality of spacers arranged between adjacent fixing rings is integrally formed with any one of the adjacent fixing rings. The solid-liquid separation device according to claim 1, wherein the detachment prevention unit includes a connecting member that fixes a plurality of fixing rings.

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