JP5842275B2 - Solid-liquid centrifuge and screw transfer device - Google Patents

Description

  The present invention relates to a solid-liquid centrifuge and a screw conveyance device, and more specifically, the clearance generated between the tip of a screw blade and the surface facing the screw blade is zero, thereby reliably preventing clogging of an object to be conveyed. In addition, the present invention relates to a solid-liquid centrifuge and a screw conveying device that can be used for a long time.

  Conventionally, a solid-liquid centrifuge or a screw for separating a solid and a liquid from a liquid mixture of a predetermined solid (for example, an aggregate of granular materials) and a predetermined liquid by using a screw for conveyance is used. There is a screw conveying device that uses and conveys the solid, the liquid or the mixed liquid.

  For example, a soymilk squeezing machine that produces soymilk from a soymilk material that is one type of food material is also composed of the screw conveying device. A predetermined screw is arranged along the axial direction of the cylinder in a cylinder having a soymilk raw material inlet and an outlet formed on the opposite side of the inlet. The screw is connected to a rotation driving unit that transmits a predetermined rotation speed, and the discharge port of the cylindrical body is pressed by a closing lid having a compression cylinder. Further, a screen having a plurality of holes is provided in a portion of the cylindrical body that is close to the outer periphery of the screw, and a screen having a plurality of holes is provided around the screw. A hopper is provided, and the discharge port is provided on the most downstream side.

  Here, when the soymilk raw material is introduced into the cylindrical body from the inlet and the rotational drive unit is operated, the screw connected to the rotational drive unit rotates at a predetermined rotational speed, so that the soymilk raw material is The screw is sequentially squeezed as it moves in the gap between the blades of the screw and proceeds to the tip side. And by the said pressing, the soymilk raw material is pressed against the said screen, and is isolate | separated into a pressing separation liquid and a dewatering cake.

  The separated compressed separation liquid is collected in a hopper for receiving soy milk and discharged from a discharge port. On the other hand, the cake-shaped dewatering basket is pushed out from the discharge port between the cylinder and the closing lid.

  However, the screw conveying device as described above has problems such as enlargement of the device, clogging of the dewatering debris on the screen, and reduction in work efficiency.

  As an invention that solves such a problem, Japanese Patent Application Laid-Open No. 9-84545 (Patent Document 1) describes a squeeze that squeezes a food raw material put into a machine and separates it into a liquid squeezed separated liquid and a dehydrated koji. A vertical cylinder that is installed along the vertical direction, and has a vertical cylinder in the cylinder. There is disclosed a squeezing machine that is housed and includes a screw that is formed so as to reduce the volume between adjacent blades from the upper side of the input side toward the lower side of the discharge side. In the squeezing machine, the screw rotation mechanism, a sliding contact member disposed between the vertical cylinder and the screw and joined to the blade tip of the screw, and a screen on which the sliding contact member slides. It has. Thereby, it is said that effects such as space saving, prevention of clogging, improvement of work efficiency, prevention of pressure loss due to the sliding contact member can be obtained. The same applies to Japanese Patent Laid-Open No. 10-258395 (Patent Document 2).

  Japanese Patent Laid-Open No. 10-128156 (Patent Document 3) contains a screw conveyor provided with a spiral blade in a rotating cylinder so as to be rotatable, and a spiral between the inner wall surface of the rotating cylinder and the screw conveyor. A centrifuge provided with solid-liquid separation regions partitioned in a shape is disclosed. In the centrifugal separator, wear resistance means for improving wear resistance is provided at the peripheral edge of the spiral blade of the screw conveyor. As a result, the durability, in particular, the abrasion resistance of the spiral blade is improved, and the object to be treated has a very high solid content such as a wire saw slurry, and the abrasive grains themselves that are the solid component are machinable (or polished). Even if it is a material of the property, it is said that it is possible to prevent the spiral blades from wearing and to enable long-term use.

  Japanese Patent Application Laid-Open No. 2001-190985 (Patent Document 4) forms a locking groove that is fixed along the outer peripheral tip of a screw blade formed in a spiral shape on the outer peripheral surface of a screw for a decanter type continuous centrifugal separator. There is disclosed a screw for a decanter type continuous centrifuge provided with a base metal and a wear-resistant material which is fitted into a locking groove of the base metal and is fixed by a base metal bolt and an adhesive. In the screw for the decanter type continuous centrifuge, further, by tightening the base metal bolt, it is screwed to the base metal bolt that presses and fixes the locking surface of the wear-resistant material against the inclined surface of the locking groove formed in the base metal. An eccentric seat is provided. As a result, the wear resistance of the screw blades is improved, the durability of the device is improved, and there is deterioration due to corrosion due to slurry, aging of the adhesive itself, etc. in addition to external force received when conveying solids However, it is possible to prevent an accident in which the wear-resistant material is peeled off from the screw blades.

JP-A-9-84545 JP 10-258395 A Japanese Patent Laid-Open No. 10-128156 JP 2001-190985 A

  Here, in the above-described solid-liquid centrifuge or screw conveyance device, if there is no clearance between the tip of the screw blade and the screen surface or cylinder surface facing the tip, the conveyance efficiency, separation efficiency, etc. are improved. It is known to do.

  In any of the inventions described in Patent Documents 1-3 described above, a predetermined slidable contact member (abrasion-resistant means) is fixed to the tip of the blade of the screw by bonding or the like, so that the clearance is zero. For this reason, there is a problem that the sliding contact member is surely worn. That is, although the clearance between the sliding contact member and the inner peripheral surface of the screen (cylinder inner wall surface) was close to zero during use, the sliding contact member was worn out by long-term use, and as a result, the clearance Will occur. When the clearance occurs, an object to be processed, for example, in the case of solid-liquid separation, the solid enters the clearance (between the sliding contact member and the screen), clogging, rattling of the screw, blades, etc. Cause problems such as degradation of

  Further, in the invention described in Patent Document 4, since the wear-resistant material of the screw blade does not come into contact with the inner surface of the ball (corresponding to the screen), naturally, there is a problem that the above-described clearance cannot be made zero. .

  Therefore, the present invention has been made to solve the above-mentioned problems, and has been made based on a groundbreaking idea as a result of intensive studies by the inventor. That is, the present invention provides a solid-liquid centrifuge that can prevent clogging of an object to be conveyed and can be used for a long period of time by setting the clearance between the tip of the screw blade and the surface facing the screw to zero. An object is to provide a separation device and a screw conveying device.

  In order to solve the above-described problems and achieve the object, a solid-liquid centrifuge according to the present invention includes a cylindrical screen filter having a plurality of holes and supplied with a mixture of solid and liquid, and the screen. A solid-liquid centrifuge equipped with a screw having spiral screw blades housed inside a filter, and a rotating unit that conveys the mixed liquid by rotating the screen filter or screw at a predetermined rotational speed. The following configuration is adopted.

  That is, the solid-liquid centrifuge is provided at the radial tip of the screw blade, is slidable in the front-rear direction toward the central axis of the screw blade within a predetermined range, and has an outer peripheral surface thereof. And an elastic body configured to project from the tip, and the screw blades are housed in the screen filter in a state where the outer peripheral surface of the elastic body is inscribed in the inner peripheral surface of the screen filter. Thus, the outer peripheral surface is pressed against the inner peripheral surface.

  Thus, due to the restoring force caused by the elastic body, the outer peripheral surface of the elastic body always presses the inner peripheral surface of the screen filter, and the radial tip of the screw blade and the inner peripheral surface of the screen filter It is possible to make the first clearance between zeros zero. Further, the elastic body slides within a predetermined range, so that the pressure from the inner peripheral surface of the screen filter against the outer bottom surface of the elastic body is appropriately relieved, and the elastic body is excessively pressed against the outer peripheral surface. Abrasion can be prevented and the elastic body can be used for a long time.

  In the solid-liquid centrifuge according to the present invention, the elastic body has a substantially straight line provided with a recess along the longitudinal direction that can be loosely fitted to the protrusion with the radial tip of the screw blade as a protrusion. It is a flexible sliding contact member. Further, the solid-liquid centrifuge device bends the sliding contact member and loosely fits the concave portion of the sliding contact member to the tip so as to be slidable in the front-rear direction toward the central axis of the screw blade, By inserting the sliding contact member between the tip and the inner peripheral surface of the screen filter, a predetermined clearance (second clearance) is provided between the inner bottom surface of the recess and the tip. The outer bottom surface of the recess can be pressed against the inner peripheral surface of the screen filter.

  Further, in the solid-liquid centrifuge according to the present invention, when the sliding contact member has a curved shape, the radius of curvature of the line drawn by the concave portion before the sliding contact member is bent is the radial direction of the screw blade. It is possible to adopt a configuration that is larger than the radius of curvature of the curve drawn by the tip.

  Further, in the solid-liquid centrifugal separator according to the present invention, the first dimension between the inner bottom surface and the outer bottom surface of the concave portion of the sliding contact member is the radial direction of the screw blade before the sliding contact member is inserted. A configuration shorter than the second dimension between the tip of the screen and the inner peripheral surface of the screen filter can be adopted.

  The solid-liquid centrifuge according to the present invention may employ a configuration in which the first dimension is shorter than the second dimension within a range of 1.0 mm-2.0 mm.

  In addition, the solid-liquid centrifugal separator according to the present invention may employ a configuration in which the hole is expanded in diameter from the inside to the outside of the screen filter.

  In the solid-liquid centrifuge according to the present invention, the longitudinal axis of the screen filter and the central axis of the screw are arranged in a horizontal direction, and the rotating unit rotates the screen filter. Is adopted. Furthermore, in the solid-liquid centrifuge according to the present invention, in the screw blade, the vicinity of the end portion on the discharge port side where the mixed liquid of the screen filter is discharged is conveyed in the mixed liquid corresponding to the longitudinal direction of the screw. By bending to the side, the inclination angle with respect to the horizontal line of the screw blades in the vicinity of the terminal portion viewed from the direction perpendicular to the longitudinal direction of the screw blades is smaller than the inclination angle with respect to the horizontal line of the other screw blades, It is possible to adopt a configuration in which the direction of the end portion is fixed to be directed upward from the horizontal position of the central axis.

  In the solid-liquid centrifuge according to the present invention, the screw blade is a spiral coil wire whose outer diameter in the radial direction is larger than the inner diameter of the screen filter by a predetermined amount, so that the diameter of the coil wire is increased. The outer peripheral surface in the direction can be the elastic body. Further, in a state where the outer peripheral surface is inscribed in the inner peripheral surface of the screen filter, the coil wire is housed inside the screen filter so that the outer peripheral surface is pressed against the inner peripheral surface; I can do it.

  In addition, the present invention can be applied to a screw conveying device from another viewpoint. That is, the screw conveying device according to the present invention includes a cylindrical cylinder to which an object to be conveyed is supplied, a screw having a helical screw blade housed in the cylinder, and the cylinder or the screw. A screw conveyance device including a rotation unit that conveys the conveyance object by rotating at a rotation speed, and adopts the following configuration.

  That is, the screw conveying device is provided at the distal end in the radial direction of the screw blade, and is slidable in the front-rear direction toward the central axis of the screw blade within a predetermined range, and the outer peripheral surface of the screw conveying device is An elastic body configured to project from the tip, and with the outer peripheral surface of the elastic body inscribed in the inner peripheral surface of the cylinder, by storing the screw blade in the cylinder, The outer peripheral surface is pressed against the inner peripheral surface.

  As a result, as described above, the first clearance between the radial tip of the screw blade and the inner peripheral surface of the cylinder is zero, and the elastic body can be used for a long time. . Further, since the first clearance is zero, it is possible to convey the object to be conveyed supplied into the cylinder to the discharge port of the cylinder with almost no remaining inside.

  According to the solid-liquid centrifuge and the screw conveying device according to the present invention, the clearance generated between the tip of the screw blade and the surface facing the screw blade is set to zero, and the clogging of the conveyance object is reliably prevented. At the same time, it enables long-term use.

It is front sectional drawing which shows an example of the solid-liquid centrifuge which concerns on this invention. It is a left side sectional view showing an example of a solid-liquid centrifuge according to the present invention. FIG. 3A is a schematic cross-sectional view for explaining a case where there is no sliding contact member between the tip of the screw blade of the solid-liquid centrifuge according to the present invention and the inner peripheral surface of the screen filter; It is a schematic sectional drawing for demonstrating the case where a sliding contact member exists between the front-end | tip of the screw blade of the solid-liquid centrifuge which concerns on this, and the internal peripheral surface of a screen filter (FIG. 3 (B)). It is a perspective view which shows an example of the sliding member of the solid-liquid centrifuge which concerns on this invention. It is a 1st perspective view for demonstrating the case where the recessed part of the sliding contact member of the solid-liquid centrifuge which concerns on this invention is attached to the front-end | tip of a screw blade | wing. It is a 2nd perspective view for demonstrating the case where the recessed part of the sliding contact member of the solid-liquid centrifuge which concerns on this invention is attached to the front-end | tip of a screw blade | wing. It is a front cross-sectional enlarged view of the terminal part vicinity of the screw blade | wing on the discharge port side in the solid-liquid centrifuge which concerns on this invention. It is a schematic sectional drawing for demonstrating the direction of the terminal part of the screw blade | wing on the discharge port side in the solid-liquid centrifuge which concerns on this invention. It is the front view and left view (FIG. 9 (A)) of the coil wire of the solid-liquid centrifuge which concerns on this invention, The state which accommodated the coil wire of the solid-liquid centrifuge which concerns on this invention inside the screen filter FIG. 9 is a front view and a left side view (FIG. 9B). It is front sectional drawing which shows an example of the screw conveying apparatus which concerns on this invention.

  Below, with reference to an accompanying drawing, an embodiment of a solid-liquid centrifuge and a screw conveyance device concerning the present invention is described, and it serves for an understanding of the present invention. In addition, the following embodiment is an example which actualized this invention, Comprising: The thing of the character which limits the technical scope of this invention is not.

  <Solid-liquid centrifuge>

  FIG. 1 is a front sectional view showing an example of a solid-liquid centrifuge 1 according to the present invention, and FIG. 2 is a left side sectional view showing an example of a solid-liquid centrifuge 1 according to the present invention. 1 and 2, the internal structure of the screw conveying device 1 according to the present invention is appropriately displayed.

  The solid-liquid centrifugal separator according to the present invention separates the solid S and the liquid L from, for example, a mixed liquid M (mixture) of the particulate solid S and the liquid L. As shown in FIGS. 1 and 2, the solid-liquid centrifuge 1 according to the present invention includes a cylindrical casing 11 and a cylinder to which the mixed liquid M is supplied (introduced) as a transport target (separation target). -Shaped screen filter 12, a screw 13 housed (arranged) in the screen filter 12, and a rotating unit 14 that conveys the mixed liquid M by rotating the screen filter 12 at a predetermined rotational speed ( Rotating means).

  The solid-liquid centrifuge 1 is a horizontal type in which a longitudinal axis 12a of the screen filter 12 and a central axis 13a which is cylindrical and can be a longitudinal axis of the screw 13 are arranged in the horizontal direction. This is a centrifugal separator.

  The screen filter 12 is provided with a supply port 12b to which the mixed liquid M is supplied at one end and a discharge port 12c through which the mixed liquid M (mainly separated solid S) is discharged at the other end. Yes. The supply port 12b is connected to the outside and communicates with a supply pipe 15 to which the mixed liquid M is supplied, and the mixed liquid M supplied to the supply pipe 15 passes through the supply port 12b to the screen filter. 12 is inserted. As shown in FIG. 1, the supply pipe 15 and the central shaft 13a of the screw 13 are integrally formed to reduce the number of members.

  Here, the screen filter 12 includes a plurality of holes having a hole diameter smaller than the size of the solid S of the mixed solution M over the entire surface.

  The screw 13 is provided with a spiral screw blade 13b along the outer peripheral surface of the central shaft 13a. The screw 13 aligns the central shaft 13a with the longitudinal axis 12a of the screen filter 12. Arranged.

  As shown in FIG. 2, the screw blade 13b is fixed by three fixing members 13c projecting radially from the outer peripheral surface of the central shaft 13a, and a space V (opening) between the outer peripheral surface of the central shaft 13a. ). In addition, the said fixing member 13c is provided for every space | interval (pitch) between the screw blades 13b adjacent to the longitudinal direction (conveyance direction) of the said screw 13, for example.

  When the screen filter 12 rotates, the screw 13 (screw blade 13b) does not rotate and the screw blade 13b remains fixed, and the rotation of the screen filter 12 is in the longitudinal direction of itself. This is performed via a belt 14a connected to the rotating part 14 around the shaft 12a.

  When the rotating unit 14 rotates the screen filter 12 about the shaft 12a, the liquid mixture M introduced therein rotates along the inner peripheral surface 12d of the screen filter 12 and the fixed portion. Guided by the radial tip 13d of the screw blade 13b thus moved, the screw blade 13b moves from the supply port 12b toward the discharge port 12c.

  Here, due to the rotation, a centrifugal force is generated in the mixed solution M, and the mixed solution M is pressed against the inner peripheral surface 12 d of the screen filter 12. Among the pressed mixed liquid M, the liquid L passes through the holes of the screen filter 12, and the solid S remains on the inner peripheral surface 12d of the screen filter 12 without passing through the holes. The remaining solid S moves to the discharge port 12c along the radial tip 13d of the screw blade 13b. Thereby, the solid-liquid centrifuge 1 separates the liquid L and the solid S from the mixed liquid M.

  The separated liquid L oozes out from the hole (outer peripheral surface) of the screen filter 12 and is collected by the first hopper 16 communicating with the lower bottom surface of the casing 11 that covers the entire screen filter 12. The separated solid S is collected by a second hopper 17 that communicates with the discharge port 12 c of the screen filter 12.

  FIG. 3A is a schematic cross-section for explaining a case where there is no sliding contact member between the tip 13d of the screw blade 13b and the inner peripheral surface 12d of the screen filter 12 of the solid-liquid centrifuge 1 according to the present invention. FIG. FIG. 3A is a cross-sectional view of the screw blade 13b cut in the longitudinal direction.

  Here, between the radial tip 13d of the screw blade 13b and the inner peripheral surface 12d of the screen filter 12, as shown in FIG. mm, hereinafter referred to as the first clearance). Even if the size of the screw blade 13b and the size of the screen filter 12 are designed and fixed with high accuracy in order to make the first clearance C1 zero, the first clearance C1 is very small. Therefore, the design is difficult. Further, the material of the screw blade 13b and the screen filter 12 is usually a metal, and rubbing them together to make the first clearance C1 zero makes the screw blade 13b excessively pressed. In reality, it is almost impossible.

  Therefore, when the solid-liquid centrifuge 1 rotates the screen filter 12 to separate the liquid L and the solid S from the mixed liquid M, the solid-liquid centrifugal separator 1 guides to the radial tip 13d of the screw blade 13b. The solid S that enters the first clearance C1 is clogged, the solid S itself is damaged, the radial tip 13d of the screw blade 13b or / and the inner peripheral surface of the screen filter 12 12d may be rattled or damaged.

  Conventionally, in order to fill the first clearance C1, a predetermined sliding contact member (conventional sliding contact member) having a size corresponding to the first clearance C1 is a fixing member such as a split pin. Although it may be fixed along the radial tip 13d of the screw blade 13b, when the screen filter 12 rotates, the conventional sliding contact member remains fixed to the tip 13d of the screw blade 13b. The screen filter 12 receives excessive pressure from the inner peripheral surface 12d toward the screw blade 13b, and is immediately worn.

  FIG. 3B is a schematic diagram for explaining a case where the sliding contact member 18 is provided between the tip 13d of the screw blade 13b and the inner peripheral surface 12d of the screen filter 12 of the solid-liquid centrifuge 1 according to the present invention. It is sectional drawing. FIG. 4 is a perspective view showing an example of the sliding member 18 of the solid-liquid centrifuge 1 according to the present invention. FIG. 3B is a cross-sectional view taken along the longitudinal direction of the screw blade 13b, as in FIG. 3A.

  Therefore, in the solid-liquid centrifuge 1 according to the present invention, as shown in FIGS. 3B and 4, the screw blade 13b is provided at the tip 13d in the radial direction of the screw blade 13b within a predetermined range. An elastic body 18 is provided which is slidable in the front-rear direction toward the central axis 13a of 13b and is configured to project its outer peripheral surface 18a2 from the tip 13d. Further, the outer peripheral surface 18a2 is accommodated in the screen filter 12 in a state where the outer peripheral surface 18a2 of the elastic body 18 is inscribed in the inner peripheral surface 12d of the screen filter 12. The inner peripheral surface 12d is pressed. Here, sliding means sliding without friction, and means that when the elastic body 18 slides, it slides without deformation of its own shape.

  Specifically, the elastic body 18 can be formed in a substantially linear shape in which a concave portion 18a that can be loosely fitted to the convex portion 13d is provided along the longitudinal direction with the radial tip 13d of the screw blade 13b as a convex portion. A flexible sliding contact member 18 is formed. Here, loose fitting means fitting in a state with play, and is completely different from fitting that fits closely in a state without play. Further, the substantially linear shape means a curved shape including a linear shape.

  5 and 6 are perspective views for explaining the case where the concave portion 18a of the sliding contact member 18 of the solid-liquid centrifuge 1 according to the present invention is attached to the tip 13d of the screw blade 13b.

  Furthermore, in the solid-liquid centrifuge 1 according to the present invention, as shown in FIGS. 5 and 6, the sliding contact member 18 is bent so that the concave portion 18a of the sliding contact member 18 is the center of the screw blade 13b. The sliding contact member 18 is loosely fitted to the tip 13d so as to be slidable in the front-rear direction toward the shaft 13a, and the sliding contact member 18 is inserted (inserted) between the tip 13d and the inner peripheral surface 12d of the screen filter 12. Thus, a predetermined clearance C2 (a second clearance) is provided between the inner bottom surface 18a1 of the recess 18a and the tip 13d, and the outer bottom surface 18a2 of the recess 18a is used as the inner peripheral surface of the screen filter 12. 12d is pressed.

  With this configuration, even if the concave portion 18a of the sliding contact member 18 is fitted into the radial tip 13d of the screw blade 13b, a restoring force (elastic force, residual force) due to its own flexibility. Stress), the inner bottom surface 18a1 of the recess 18a is separated from the radial tip 13d of the screw blade 13b (the second clearance C2 described above is generated) The outer bottom surface 18a2 of the recess 18a always presses the inner peripheral surface 12d of the screen filter 12. Therefore, the first clearance C1 described above does not occur between the outer bottom surface 18a1 of the recess 18a of the sliding contact member 18 and the inner peripheral surface 12d of the screen filter 12, and the above-described problems such as clogging are caused. Can be solved.

  On the other hand, when the sliding contact member 18 is inserted between the radial tip 13d of the screw blade 13b and the inner peripheral surface 12d of the screen filter 12, as shown in FIG. The second clearance C2 is generated between the inner bottom surface 18a1 of the recess 18a of the contact member 18 and the radial tip surface 13c of the screw blade 13b. This second clearance C2 is the predetermined slidable range described above. The recess 18a of the sliding contact member 18 is configured to be slidable in the front-rear direction toward the central axis 13a of the screw blade 13b. Therefore, the entire sliding contact member 18 functions like an elastic body 18 with respect to the radial tip 13d of the screw blade 13b and the inner peripheral surface 12d of the screen filter 12, and is generated by the rotation of the screen filter 12. It becomes possible to relieve (absorb) the pressure on the radial tip 13d of the screw blade 13b.

  That is, when the outer bottom surface 18a2 of the concave portion 18a of the sliding contact member 18 always presses the inner peripheral surface 12d of the screen filter 12 and the screen filter 12 rotates, the outer bottom surface 18a1 of the concave portion 18a is For various reasons, when the pressure is received from the inner peripheral surface 12d of the screen filter 12 and forcedly (mechanically) pushed back toward the radial tip 13d of the screw blade 13b, the second Due to the presence of the clearance C2, the outer bottom surface 18a1 of the recess 18a does not directly collide with the radial tip 13d of the screw blade 13b, and the radial direction of the screw blade 13b is equal to the second clearance C2. It moves to the tip 13d side (reduced if it is an elastic body) to relieve the pressure.

  On the other hand, if the inner peripheral surface 12d of the screen filter 12 is separated from the outer bottom surface 18a1 of the recess 18a for various reasons accompanying the rotation, the outer bottom surface 18a1 of the recess 18a is caused by the restoring force described above. The second clearance C2 moves toward the inner peripheral surface 12d side of the screen filter 12 (extends if it is an elastic body) and follows and closely matches the inner peripheral surface 12d of the screen filter 12. One clearance C1 is set to zero.

  As described above, the outer bottom surface 18a2 of the concave portion 18a of the sliding contact member 18 is excessively rubbed against the inner peripheral surface 12d of the screen filter 12 in spite of maintaining the first clearance C1 at zero. There is no wear. For this reason, it is possible to solve the problems such as clogging that have conventionally existed and to use the sliding contact member 18 for a long period of time.

  The fact that the first clearance C1 becomes zero is not limited to mean that it is strictly 0.0 mm. It also includes being several mm (for example, 0.1 mm, 0.2 mm, etc.).

  In addition, the restoring force is not limited to occur constantly throughout the sliding contact member 18 due to reasons such as long-term use of the solid-liquid centrifuge 1. In reality, the sliding contact member 18 is not limited. In the predetermined position, the first clearance C1 is 0. Although it may be several mm, the effect obtained when the first clearance C1 is zero or close to zero is the same as described above.

  Here, the sliding contact member 18 is not particularly limited as long as it is substantially linear. For example, as shown in FIGS. 4 and 5, when the sliding contact member 18 has a curved shape, the sliding contact is performed. When the curvature radius R1 of the line drawn by the concave portion 18a (specifically, the inner bottom surface 18a1) before bending of the member 18 is larger than the curvature radius R2 of the curve drawn by the radial tip 13d of the screw blade 13b, preferable. With this configuration, when the concave portion 18a of the sliding contact member 18 is loosely fitted to the radial tip 13d of the screw blade 13b, it is necessary to bend the sliding contact member 18 reliably. 18 ensures that the restoring force described above is formed. Then, the outer bottom surface 18a2 of the concave portion 18a of the sliding contact member 18 is surely pressed against the inner peripheral surface 12d of the screen filter 12, and the first clearance C1 can be made zero.

  The sliding contact member 18 is not particularly limited as long as the above-described second clearance C2 can be provided between the inner bottom surface 18a1 of the recess 18a and the tip 13d. For example, as shown in FIG. 3B, the first dimension t1 between the inner bottom surface 18a1 and the outer bottom surface 18a2 of the recess 18a is a diameter of the screw blade 13b before the sliding contact member 18 is inserted. Preferably, it is shorter than the second dimension t2 between the tip 13d in the direction and the inner peripheral surface 12d of the screen filter 12. Here, the inner bottom surface 18a1 of the recess 18a corresponds to the bottom surface facing the radial tip 13d of the screw blade 13b, and the outer bottom surface 18a2 of the recess 18a faces the inner peripheral surface 12d of the screen filter 12. Corresponds to the bottom surface. If comprised in this way, it will become possible to provide the 2nd clearance C2 mentioned above reliably.

  Further, the first dimension t1 is not particularly limited as long as the second clearance C2 described above is generated. For example, the second dimension (corresponding to the first clearance C1) is very small (several mm), and accordingly, the first dimension t1 is less than the second dimension t2. It is preferable if it is short within the range of 0 mm-2.0 mm. If comprised in this way, while the said sliding contact member 18 will relieve | moderate the press from the said screen filter 12 suitably, the recessed part 18a of the said sliding contact member 18 will rotate the said screen filter 12, and the said screw blade | wing 13b It is possible to prevent falling off from the radial tip 13d.

  Further, the depth t of the recess 18a of the sliding contact member 18, that is, the third dimension t3 between the inner bottom surface 18a1 of the recess 18a and the outer surface 18a3 extending to the outside is determined by the sliding contact member 18 being the screw. There is no particular limitation as long as it can be loosely fitted to the radial tip 13d of the blade 13b. For example, as shown in FIG. 3B, if the first dimension t1 is within a range of 1.0 mm to 2.0 mm, the third dimension t3 is more than the first dimension t1. A long length within the range of 5.0 mm-8.0 mm is preferable. In other words, the dimension between the outer bottom surface 18a2 and the outer surface 18a3 of the recess 18a is in the range of 6.0 mm to 10.0 mm. If comprised in this way, while the recessed part 18a of the said sliding contact member 18 can be loosely fitted (attached) to the front-end | tip 13d of the radial direction of the said screw blade 13b easily, the whole said sliding contact member 18 can be smoothly carried out in the said screw blade. It can be inserted between the radial tip 13d of 13b and the inner peripheral surface 12d of the screen filter 12. Further, the rotation of the screen filter 12 can make it difficult for the concave portion 18a of the sliding contact member 18 to be detached from the radial tip 13d of the screw blade 13b. On the other hand, if the third dimension t3 is too large, it will be difficult to attach the concave portion 18a to the tip 13d in the radial direction of the screw blade 13b, and if it is too small, the insertion itself will be impossible. The third dimension t3 is, for example, 6.5 mm, and the dimension between the outer bottom surface 18a2 and the outer surface 18a3 of the recess 18a is, for example, 8.2 mm.

  The fourth dimension t4 between (both) inner surfaces of the recess 18a of the sliding contact member 18 is not particularly limited. For example, as shown in FIG. 3B, the fourth dimension t4 is It is preferable that the width W is less than the dimension W (width) between (both) outer surfaces of the radial tip 13d of the screw blade 13b within a range of 0.2 mm to 0.8 mm. With this configuration, when the concave portion 18a of the sliding contact member 18 is loosely fitted to the radial tip 13d of the screw blade 13b, the concave portion 18a is securely attached to the central shaft 13a of the screw blade 13b. It is possible to loosely fit the tip 13d so as to be slidable in the front-rear direction. The fourth dimension t4 is, for example, 3.2 mm, and the dimension W between the outer surfaces of the tip 13d is, for example, 2.6 mm.

  The fifth dimension t5 between (both) outer surfaces of the sliding contact member 18 is not particularly limited. For example, as shown in FIG. 3B, the fifth dimension t5 is It is preferable that it is longer in the range of 3.0 mm-6.0 mm than the dimension W (width) between the outer surfaces of the radial tip 13d of the screw blade 13b. If comprised in this way, when attaching the said sliding contact member 18 to the said screw blade 13b, it is easy to loosely fit the recessed part 18a of the said sliding contact member 18 with respect to the radial front-end | tip 13d of the said screw blade 13b. It becomes possible. The fifth dimension t5 is, for example, 6.5 mm. Further, both side portions of the concave portion 18a of the sliding contact member 18 may be configured to sandwich the radial tip 13d of the screw blade 13b.

  The material of the sliding contact member 18 is not particularly limited as long as it is flexible. For example, a synthetic resin having excellent wear resistance is preferable. Further, the total length in the longitudinal direction of the sliding contact member 18 does not have to coincide with the total length of the line drawn by the radial tip 13d of the screw blade 13b, and the sliding contact members 18 having a predetermined length are connected in series. Then, the recess 18a for each sliding contact member 18 may be configured to be loosely fitted to the radial tip 13d of the screw blade 13b. In addition, if the total length in the longitudinal direction of the sliding contact member 18 corresponds to the total length of the line drawn by the radial tip 13d of the screw blade 13b, it is set to 25.0 m, for example.

  Further, the hole 12e of the screen filter 12 is not particularly limited. For example, as shown in FIG. 3B, it is preferable that the diameter is increased from the inside to the outside of the screen filter 12. With this configuration, the solid S separated from the liquid mixture M is not forced into the hole 12e due to friction with the sliding contact member 18 (the outer bottom surface 18a2 of the recess 18a). It becomes possible to solve problems such as clogging.

  The distance (thickness) from the inner peripheral surface 12d to the outer peripheral surface of the screen filter 12 is not particularly limited, but is, for example, 2.0 mm. Further, the maximum hole diameter of the hole 12e is not particularly limited, but is, for example, in a range from 0.3 mm to 3.0 mm.

  FIG. 7 is an enlarged front sectional view of the vicinity of the end portion 13b1 of the screw blade 13b on the discharge port 12c side in the solid-liquid centrifugal separator 1 according to the present invention. FIG. 8 is a schematic cross-sectional view for explaining the direction D of the end portion 13b1 of the screw blade 13b on the discharge port 12c side in the solid-liquid centrifuge 1 according to the present invention.

  Moreover, although the terminal part 13b1 by the side of the said discharge port 12c in the said screw blade 13b is not specifically limited, For example, when the following structures are employ | adopted, it is still more preferable. That is, as shown in FIG. 7, the vicinity of the end portion 13b1 is bent at a predetermined position 13b2 to the transport direction side (the discharge port 12c side) of the mixed liquid (conveyance target) corresponding to the longitudinal direction of the screw 13. Thus, the inclination angle α with respect to the horizontal line of the screw blade 13b in the vicinity of the end portion 13b1 as seen from the direction perpendicular to the longitudinal direction of the screw 13 is made smaller than the inclination angle β with respect to the horizontal line of the other screw blades 13b. . Further, as shown in FIG. 8, the direction D of the end portion 13b1 is fixed to be directed upward from the horizontal position H (height) of the central shaft 13a. In FIG. 8, the direction D of the end portion 13b1 on the discharge port 12c side of the screw blade 13b is fixed upward by an angle of 30 degrees with respect to the horizontal position H of the central shaft 13a. Yes.

  By configuring in this way, first, the end portion 13b1 of the screw blade 13b does not face the inner peripheral surface 12d side of the screen filter 12 by the bending, and the longitudinal axis 12a side of the screen filter 12 Will turn to. Then, as shown in FIG. 7, when the solid S transported along the screw blade 13b by the rotation of the screen filter 12 is discharged (opened or released) from the end portion 13b1, it is directed upward. It will be released and fall with a parabola. Due to this fall, the momentum of the solid S is relaxed, and the solid S can be efficiently recovered without being scattered (diffused) or damaged.

  Further, as shown in FIG. 8, the mixed liquid M (mainly solid S) that rotates and moves inside is usually discharged along the direction D in which the end portion 13b1 on the discharge port 12c side of the screw blade 13b faces ( The member facing the end portion 13b1 of the screw blade 13b is not the screen filter 12 but the casing 11 on the discharge port 12c side because the end portion 13b1 is the end member. . Therefore, when the solid S that has hitherto stuck to the screen filter 12 is discharged along the predetermined direction D at the end portion 13b1, it collides with the inner surface of the casing 11 facing the end portion 13b1 vigorously. (Contact, brake). Here, if the direction D of the end portion 13b1 is configured as described above, the separated solid S will fall in a parabola from the top to the bottom due to the collision. In the same manner as described above, the solid S is efficiently recovered without scattering. As a result, the separation yield can be increased.

  Here, the position of the end portion 13b1 is not particularly limited. For example, as the rotational speed of the screen filter 12 increases, the position near the upper portion of the central axis 13a of the screw 13 is indicated by a dotted line in FIGS. Further, the position of the end portion 13b1 is preferable because the momentum of the solid S that increases as the rotational speed increases, that is, the momentum of the released solid S can be moderated appropriately.

  In addition, the rotational speed (circumferential speed) of rotating the screen filter 12 in the rotating unit 14 is appropriately changed in design according to parameters such as the components of the mixed liquid M and the target separation yield. For example, when the mixed solution M is a mixture of a particulate solid (such as salmon eggs) whose film strength is very weak and a liquid L that is oil, the rotational speed is set to several m / sec. (For example, 2.5 m / sec, 5.0 m / sec, etc.) is preferable because the solid S can be separated without being damaged.

  The component of the mixed liquid M is not particularly limited. For example, when the liquid L is oil, the oil is applied to the sliding contact member 18, and the solid S applied to the sliding contact member 18. It is possible to prevent the solid S from being caught and crushed between the sliding contact member 18 and the screen filter 12 with certainty. The mixed liquid M is, for example, a mixture of about 6000 particulate solids (eg, salmon eggs) in 2 L of oil.

  As described above, the solid-liquid centrifugal separator 1 according to the present invention is provided at the radial tip 13d of the screw blade 13b, and slides in the front-rear direction toward the central axis 13a of the screw blade 13b within a predetermined range. An elastic body 18 (sliding contact member) is provided that is movable and configured to project its outer peripheral surface 18a2 from the tip 13d. Then, with the outer peripheral surface 18 a 2 of the elastic body 18 inscribed in the inner peripheral surface 12 d of the screen filter 12, the screw blade 13 b is accommodated inside the screen filter 12, so that the outer peripheral surface 18 a 2 is The inner peripheral surface 12d is pressed.

  Thereby, the outer bottom surface 18a2 of the recess 18a of the sliding contact member 18 always presses the inner peripheral surface 12d of the screen filter 12 by the restoring force resulting from the flexibility of the sliding contact member 18, and the screw blade The first clearance C1 between the radial tip 13d of 13b and the inner peripheral surface 12d of the screen filter 12 can be made zero. In addition, a second clearance C2 is generated between the inner bottom surface 18a1 of the concave portion 18a of the sliding contact member 18 and the tip surface 13c of the screw blade 13b, whereby the outer bottom surface of the concave portion 18a of the sliding contact member 18 is obtained. The pressure from the inner peripheral surface 12d of the screen filter 12 against the 18a2 is appropriately relieved to prevent excessive wear of the outer bottom surface 18a2 of the concave portion 18a of the sliding contact member 18, and the sliding contact member 18 can be used for a long time. It becomes possible.

  In the solid-liquid centrifuge 1 of the present invention, a sliding contact member 18 as shown in FIGS. 3B and 4 is adopted, and the elastic body 18 described above is provided at the radial tip 13d of the screw blade 13b. However, as long as the objects and effects of the present invention can be obtained, other configurations may be used.

  9A is a front view and a left side view of the coil wire of the solid-liquid centrifuge according to the present invention, and FIG. 9B is a screen showing the coil wire of the solid-liquid centrifuge according to the present invention. It is the front view and the left view of the state accommodated in the inside of a filter.

  For example, in the solid-liquid centrifuge 1 of the present invention, as shown in FIG. 9 (A), the screw blade 13b has a spiral whose outer diameter R3 in the radial direction is larger than the inner diameter R4 of the screen filter 12 by a predetermined amount. By using the coil-shaped coil wire 13b, the outer peripheral surface 18a2 in the radial direction of the coil wire 13b is used as the elastic body 18. 9B, the coil wire 13b is accommodated in the screen filter 12 with the outer peripheral surface 18a2 inscribed in the inner peripheral surface 12d of the screen filter 12. As shown in FIG. The outer peripheral surface 18a2 may be pressed against the inner peripheral surface 12d.

  Here, the radial outer peripheral surface 18a2 of the coil wire 13b is also the elastic body 18 and corresponds to the radial tip 13d of the screw blade 13b described above.

  Even if comprised in this way, since the said coil wire 13b itself becomes an elastic body, naturally the outer peripheral surface 18a2 of the radial direction of the said coil wire 13b also functions as an elastic body. Therefore, the outer peripheral surface 18a2 always presses the inner peripheral surface 12d of the screen filter 12, and the first clearance C1 between the outer peripheral surface 18a2 and the inner peripheral surface 12d can be made zero. It is possible to reliably prevent clogging of the solid S in the mixed solution M.

  Further, even if the outer circumferential surface 18a2 in the radial direction of the coil wire 13b moves (shrinks) toward the central axis 13a of the coil wire 13b, a space V is provided inside the coil wire 13b. Excessive pressing is not applied to the wire 13b itself. That is, the outer peripheral surface 18a2 in the radial direction of the coil wire 13b slides in the front-rear direction toward the central axis 13a of the screw blade 13b within a predetermined range corresponding to the space V, and the inside of the screen filter 12 The pressure from the peripheral surface 12d is moderated appropriately. Thereby, excessive wear of the coil wire 13b can be prevented, and the coil wire 13b can be used for a long time. In particular, since the screw blade 13b is the coil wire 13b, it is not necessary to newly provide the above-described sliding contact member 18 and the like, so that it is possible to reduce the number of parts and reduce the cost.

  Here, when the coil wire 13b is housed inside the screen filter 12, the direction of the central axis 13a of the coil wire 13b is of course matched with the direction of the axis 12a of the screen filter 12.

  The predetermined amount between the outer diameter R3 in the radial direction of the coil wire 13b and the inner diameter R4 of the screen filter 12 is not particularly limited, but excessive damage to the coil wire 13b and the screen filter 12 is considered. Then, for example, it is within the range of 1.0 mm to 10.0 mm, specifically within the range of 3.0 mm to 5.0 mm.

  The coil wire 13b may be housed in the screen filter 12 in any way. For example, the screen filter 12 is rotated, and the coil wire 13b is fixed in the screen filter 12. If so, it can be configured as follows. That is, as shown in FIGS. 9 (A) and 9 (B), the end portion 13b3 of the coil wire 13b extends to the vicinity of the center C of the coil wire 13b and the extended end portion. A tube portion 13b4 that can be fitted to the cylindrical central shaft 13a of the screw 13 is provided at 13b3. Then, the coil wire 13 b is fixed inside the screen filter 12 by fitting the tube portion 13 b 4 of the coil wire 13 b to the central shaft 13 a of the screw 13. If it is difficult to fix the entire coil wire 13b at one end of the coil wire 13b, a similar pipe portion is provided at the other end of the coil wire 13b, and the coil wire 13b You may comprise so that the whole may be fixed at both ends.

  The material of the coil wire 13b is not particularly limited, and examples thereof include stainless steel, steel, and resin.

  Further, the wire diameter of the coil wire 13b (the cross-sectional diameter of the wire itself) is not particularly limited, but, for example, the solid S in the liquid L is within a range of 2.0 mm to 5.0 mm. Since it becomes possible to separate smoothly without crushing, it is preferable. In addition, the wire diameter of the coil wire 13b shown to FIG. 9 (A) and FIG. 9 (B) is 2.6 mm.

  Further, the interval P (pitch) between the coil wire rods 13b adjacent to each other in the direction of the central axis 13a (longitudinal direction) of the coil wire rod 13b is not particularly limited. For example, the size of the solid S in the mixed liquid M is large. Accordingly, even if there is no pitch P and the coil wires 13b adjacent to each other in the direction of the central axis 13a are in contact with each other, a predetermined amount of the pitch P is provided and the coils adjacent in the direction of the central axis 13a. The wires 13b may be separated from each other.

  Further, in the solid-liquid centrifuge 1 of the present invention, it is applied to the horizontal solid-liquid centrifuge 1, but it is not necessary to be limited to this, for example, even if it is applied to a vertical solid-liquid centrifuge. Based on the principle, the same effects can be achieved.

  The solid-liquid centrifuge 1 of the present invention is applied to the solid-liquid centrifuge 1 in which the screen filter 12 rotates. However, the present invention is not limited to this. For example, the screw (screw blade) rotates. Even if it is applied to a solid-liquid centrifuge, the same effects can be obtained based on the principle of the principle. In addition, when rotating the said screw, it cannot be overemphasized that the position of the terminal part 13b1 of the said screw blade | wing 13b cannot be fixed.

  Further, the solid-liquid centrifuge 1 of the present invention is applied to the solid-liquid centrifuge 1 for separating the mixed liquid M obtained by mixing the solid S and the liquid L. However, the present invention is not limited to this. A predetermined mixture such as a mixture (mixed powder) of a first solid (first particle) having a size larger than that of a second solid (second particle) having a size larger than the size of the first solid. You may apply to the centrifuge 1 which isolate | separates the aggregate | assembly of this granular material.

  Further, in the solid-liquid centrifuge 1 of the present invention, a configuration is adopted in which a space is formed between the screw blade 13b and the outer peripheral surface of the central shaft 13a. However, the present invention is not limited to this. The screw blade 13b may be configured to protrude from the outer peripheral surface of the central shaft 13a of the screw 13.

  In the solid-liquid centrifuge 1 of the present invention, the mixed liquid M is supplied to the screen filter 12 through the supply pipe 15. What is the supply form of the mixed liquid M? A supply form may be used. For example, the central shaft 13a of the screw 13 is hollow, the central shaft 13a is opened downward on the supply port 12b side of the screen filter 12, and the central shaft 13a is opened from the discharge port 12c side of the screen filter 12. You may comprise so that the said liquid mixture M may be supplied through this.

  <Screw conveying device>

  Next, it will be described with reference to FIG. 10 that the present invention is applicable to a screw conveying device. Compared with the solid-liquid centrifuge 1 according to the present invention, the screw conveying device 2 according to the present invention is different in that the screen filter 12 is a non-porous cylinder 22. Since the other points are the same as those of the solid-liquid centrifuge 1 according to the present invention, the drawings (FIGS. 3 to 6) used in the description of the solid-liquid centrifuge 1 according to the present invention are appropriately referred to. Common members and symbols are used as they are.

  FIG. 10 is a front sectional view showing an example of the screw conveying device 2 according to the present invention.

  The screw conveying device 2 according to the present invention includes a cylindrical cylinder 22 to which an object to be conveyed M is supplied, a screw 13 having a spiral screw blade 13b housed in the cylinder 22, and the screw 13 And a rotating unit 14 that conveys the conveyance object M by rotating at a predetermined rotation speed.

  In the screw conveying device 2 according to the present invention, when the rotating unit 14 rotates the screw 13 around the central axis 13a, the conveying object M introduced into the inside is guided to the screw blade 13b. While rotating, it moves from the supply port 22b of the cylinder 22 toward the discharge port 22c along the inner peripheral surface 22d of the cylinder 22 to be fixed.

  Here, the screw conveying device 2 is provided at the radial tip 13d of the screw blade 13b in the same manner as the solid-liquid centrifuge 1 described above, and within a predetermined range, the central shaft 13a of the screw blade 13b. And an elastic body 18 (sliding contact member) configured to project its outer peripheral surface 18a2 from the tip 13d. Then, with the outer peripheral surface 18 a 2 of the elastic body 18 inscribed in the inner peripheral surface 12 d of the screen filter 12, the screw blade 13 b is accommodated inside the screen filter 12, so that the outer peripheral surface 18 a 2 is The inner peripheral surface 12d is pressed.

  That is, as shown in FIG. 3 to FIG. 6, the elastic body 18 is provided with a concave portion 18 a along the longitudinal direction that can be loosely fitted into the convex portion with the radial tip 13 c of the screw blade 13 b as a convex portion. This is a substantially linear and flexible sliding contact member 18. The screw conveying device 2 bends the sliding contact member 18 so that the concave portion 18a of the sliding contact member 18 can slide in the front-rear direction toward the radial tip 13c of the screw blade 13b. The sliding contact member 18 is inserted between the tip 13c and the inner peripheral surface 22d of the cylinder 22 so that the sliding contact member 18 is inserted between the inner bottom surface 18a1 of the recess 18a and the tip 13c. The second clearance C <b> 2 is provided to the outer peripheral bottom surface 18 a <b> 2 of the recess 18 a against the inner peripheral surface 22 d of the cylinder 22.

  As a result, similarly to the solid-liquid centrifuge 1 according to the present invention, the first clearance C1 between the radial tip 13c of the screw blade 13b and the inner peripheral surface 22d of the cylinder 22 is set to zero. The sliding contact member 18 can be used for a long time. Further, the zero of the first clearance C1 makes it possible to convey the object to be conveyed supplied into the cylinder 22 to the discharge port 22c of the cylinder 22 with hardly remaining inside.

  In addition, since the structure, material, dimension, etc. of the said sliding contact member 18 are the same as that of the solid-liquid centrifuge 1 which concerns on this invention, the description is abbreviate | omitted.

  Moreover, in the screw conveying apparatus 2 of this invention, when rotating the said screw 13, it cannot be overemphasized that the position of the terminal part 13b1 of the said screw blade | wing 13b cannot be fixed like the above-mentioned. On the other hand, the screw conveying device 2 of the present invention may be configured to rotate the cylinder 22 similarly to the solid-liquid centrifuge 1 of the present invention.

  Moreover, in the screw conveying apparatus 2 of this invention, it cannot be overemphasized that the said screw blade | wing 13b may be replaced with the said coil wire 13b shown in FIG.

  In the screw conveying device 2 of the present invention, the conveying object M may be a solid, a liquid, a mixed liquid obtained by mixing a solid and a liquid, or a predetermined slurry or the like. It may also contain a liquid having the following viscosity.

  As described above, the solid-liquid centrifuge and the screw transfer device according to the present invention are useful not only in the solid-liquid centrifuge, but also in a normal centrifuge and a normal screw-type transfer device. It is effective as a solid-liquid centrifuge and screw transport device that can prevent clogging of the object to be transported, etc., and can be used for a long time, with zero clearance between the tip and the surface facing it. is there.

DESCRIPTION OF SYMBOLS 1 Solid-liquid centrifuge 11 Casing 12 Screen filter 12d Inner peripheral surface of screen filter 13 Screw 13a Center axis of screw 13b Screw blade 13c Tip of screw blade 14 Rotating part 15 Supply pipe 16 First hopper 17 Second hopper 18 Sliding member 18a Recessed portion 18a1 Inner bottom surface 18a2 Outer bottom surface 2 Screw conveying device 22 Cylinder 22d Inner circumferential surface of cylinder

Claims (1)

A cylindrical screen filter having a plurality of holes and supplied with a mixed liquid of a solid and a liquid, a screw having a spiral screw blade accommodated in the screen filter, and the screen filter A solid-liquid centrifuge provided with a rotating part that conveys the mixed liquid by rotating at a rotational speed,
Provided at the radial tip of the screw blade, is slidable in the front-rear direction toward the central axis of the screw blade within a predetermined range, and is configured to project its outer peripheral surface from the tip. Equipped with an elastic body,
The elastic body is a substantially linear and flexible sliding contact member provided with a concave part that can be loosely fitted to the convex part with the tip of the screw blade as a convex part,
The sliding contact member is bent, and the recess of the sliding contact member is loosely fitted to the tip so as to be slidable in the front-rear direction toward the central axis of the screw blade, and the sliding contact member is connected to the tip and the tip. By inserting between the inner peripheral surface of the screen filter, a predetermined clearance is provided between the inner bottom surface of the recess and the tip, and the outer bottom surface of the recess is pressed against the inner peripheral surface of the screen filter. And let
A longitudinal axis of the screen filter and a central axis of the screw are arranged so as to be in a horizontal direction,
The rotating part rotates the screen filter, and the vicinity of the end of the screw blade where the mixed liquid of the screen filter is discharged is on the side of the mixed liquid corresponding to the longitudinal direction of the screw. The angle of inclination with respect to the horizontal line of the screw blades in the vicinity of the terminal part viewed from the direction perpendicular to the longitudinal direction of the screw is made smaller than the angle of inclination with respect to the horizontal line of the other screw blades. A solid-liquid centrifuge in which the direction of the portion is fixed to be directed upward from the horizontal position of the central axis .