JPS59102418A - Dehydrating screen device - Google Patents

Abstract

PURPOSE:To improve screening capacity, by forming the water head of an original liquid containing coarse particles, and vibrating a screening net provided to an opening, in a casing revolving around an axial line extending laterally. CONSTITUTION:An original liquid to be treated which contains coarse particles is charged, through a charging pipe 25, from an opening at one side of a casing 11 which forms a cylindrical part 11b and a hollow truncated-cone-shaped part 11a, and a screening net 12 is provided to an opening at another side; in a dehydrating screen device constructed to revolve the casing 11 around an axial line set laterally by a driving means 20 for revolution consisting of sprocket wheels 21, 23 and a chain 22, etc. while supporting the casing 11 by rolls 30, the water head DELTAP of the original liquid is formed in the inside of the casing 11, and the net 12 is vibrated in the direction of an arrow 29 by a vibrating means 16 consisting of an oscillator 18 and a rod 17 to promote the screening. The separated coarse particles are carried upward by a carrying member 26 to fall on a screw conveyor 15 and is carried out. Further, a backwashing means can be provided to the outside of the net 12.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deliquid sieving device for filtering a suspended stock solution containing coarse particles.

FIG. 1 is a simplified longitudinal cross-sectional view of a prior art dewatering sieve device 1. As shown in FIG. The liquid removal sieve device 1 includes a fixed base portion 1a and a vibrating portion 1b attached to the base portion 1a by a spring 66 so as to be able to freely vibrate. The vibrating portion 1b is vibrated by the power of a motor 6 fixed to the base portion 1a via a vibrating means 7 having an eccentric weight. Vibrating part 1b
A sieve net 3 is horizontally stretched over the sieve net 3, and the sieve net 3 vibrates due to the vibration of the vibrating portion 1b. Deliquid sieving device 1
A raw solution to be treated containing coarse particles is dropped and supplied onto a sieve screen 3 from a supply pipe 2 above the sieve. The raw solution to be treated on the sieve screen 3 is sieved into coarse particles and allowed liquid by the vibration of the sieve screen 3. The sieved coarse particles are transferred to the vibrating section 1.
The filtered liquid is discharged from the discharge path formed in the vibrating portion 1b from below the sieve net 3 as shown by the arrow 5, while the filtered liquid is discharged from the discharge path formed in the vibrating portion 1b from below the sieve net 3. Ru.

In such a conventional technique, since the sieve screen 3 is provided horizontally, a water head is not formed by the raw solution to be treated, and the water head cannot be effectively utilized. In the past, sieving was performed only by the vibration of the sieve net 3, and the sieving capacity was limited.

It is an object of the present invention to provide a dewatering sieving device with improved sieving capacity.

Embodiments of the present invention will be described below based on the drawings. FIG. 2 is a longitudinal cross-sectional view of the liquid removal sieve device 10 according to an embodiment of the present invention, and FIG.
It is a sectional view seen from II. The deliquid sieving device 10 includes a casing 11 having a horizontal axis (in this embodiment, an oblique line), a sieving net 12 stretched over one opening in the axial direction of the casing 11, and a screened coarse sieve. A screw conveyor 15 as a discharge means for discharging grains, and a vibration means 1 for vibrating the sieve net 12
6, backwashing means 19 for backwashing the sieve screen 12,
Is it provided on the inner circumference of the casing 11? , Nlh conveying member 26, and a rotational drive means 20 for rotationally driving the casing 11.

The vibration means 16 includes an oscillator 18 and a rod 17,
The sieve screen 12 is caused to reciprocate and vibrate in the @ line direction of the thing 11 (arrow 29 direction) via the bearing 28. Vibration means 16
The vibration generating mechanism may be an electric mechanism such as a one-by-break, or a mechanical mechanism such as an eccentric crank type. The rotation drive means 20 includes a chino 22, a sprocket wheel 23, and an electric motor (not shown).

The casing 11 roughly includes a cylindrical portion 1it) and a cylindrical portion 11.
1) and a hollow truncated conical portion 11a that expands in the direction of the sieve net 12. The casing 11 is rotatably supported by a plurality of rollers 30 with an oblique axis.

A sprocket wheel 21 is provided on the outer periphery of the casing 11.
is formed and wound around a small-diameter sprocket wheel 23 via an endless chain 22, and the sprocket wheel 23 is further connected to an electric motor (not shown). In this manner, the casing 11 is rotated in the direction of the arrow 24 in FIG. 3 by the rotation drive means 20.

A screw conveyor 15 and a supply pipe 25 are inserted into the casing 11 from an opening on the cylindrical portion 11b side. A suspended raw solution to be treated containing coarse particles, such as a cloudless solution of starch or polyvinyl chloride, is supplied to the casing 11 from the supply pipe 25 . On the inner circumferential surface of the truncated conical portion 11 & of the casing 11 , a plurality of plate-shaped conveying members 26 that protrude radially inward and in the rotational direction and extend along the axis of the casing 11 are arranged at intervals in the circumferential direction. It is fixedly installed with an opening. As the casing 11 rotates, the coarse particles 27 accumulated below the casing 11 are transported upward by the transport member 26, fall onto the screw conveyor 15, and are discharged outside the casing 11 by the screw conveyor 5. The conveying member 26 may be curved to ensure reliable conveyance of coarse particles.

FIG. 4 is a sectional view showing an example of the bearing 28 shown in FIG. 2. A small diameter portion 48 is formed at the end of the rod 17. A spherical body 49 having a spherical outer shape is fitted into the small diameter portion 48, and the center of the spherical body 49 is aligned on the axis of the rod 17. It is composed of The spherical body 49 is a washer 50
It is pressed against and fixed to the small diameter portion 48 by a screw 51 via. The spherical body 49 is thus fixed to the end of the rod 17. The spherical body 49 is received by a spherical seat 52, and this spherical seat 52 is held down by a fixing piece 54, which has a screw 56 attached to one end of the bearing body 55.
Fixed by A center portion of the sieve mesh 12 sandwiched between the clamping plates 57 is fixed to the end of the bearing body 55 on the side opposite to the rod 17 by a screw 58 .

The spherical body 49 and the spherical seat 52 constitute a spherical bearing, which receives the thrust force and radial force of the rod 17.

This bearing 28 allows the sieve net 12 to rotate integrally with the casing 11, and allows the sieve net 12 to vibrate in the direction of arrow 29 by the vibration means 16.

The size of the sieve of this sieve net 12 is, for example, 300 to 400.
Selected by Metsuyu.

A backwashing means 19 is provided on the upper part of the sieve screen 12 facing the opposite side of the screw conveyor 15 with respect to the sieve screen 12, and this backwashing means 19 blows out compressed air from a plurality of blow-off ports 31. This prevents clogging of the sieve screen 12. Since the sieve net 12 rotates together with the casing 11, it becomes possible to backwash the sieve net 12 during operation, which was previously impossible.

FIG. 5 is an enlarged view showing an example of section V of FIG. 2. The end of the casing 11 is curved outward in the axial direction, and one end of a ring-shaped support plate 61 is fixed to this curved portion with a screw 62. This support plate 61
The other end is fixed to a ring-shaped support member 60. The supporting member 60 is made of an elastic material such as rubber. A ring-shaped pressure plate 63 is fixed to the support portion 860 . This pinching plate 63 and other pinching plates 64 allow the sieve screen 12 to
is compressed and fixed with screws 65.

Since the sieve net 12 is attached to the casing 11 via the elastic support member 60 in this way, the vibration of the sieve net 12 is damped by the support member 60, so that no unreasonable force is applied to the periphery of the sieve net 12 during vibration. This prevents damage from occurring. If the strands 66 constituting the sieve net 12 are loosely stretched and the sieve net 12 can vibrate due to elastic deformation of the strands, the clamping plate 63 is directly attached to the curved end portion of the casing 11 with the screws 62. It may be fixed.

In the liquid removal device 10 configured in this way, the raw solution to be treated supplied from the supply pipe 25 accumulates below the casing 11, producing a water head of ΔP as shown in FIG. Pressure due to this water head and sieve net 12 due to vibration means 16
The vibration of the sieve improves the capacity of the sieve. Sieve net 1
The liquid sieved by 2 is discharged downward by a cover 32. Furthermore, the sieve net 12 rotates together with the casing 11 and is backwashed by the backwashing means 19 above, so that sieving can be carried out more effectively.

FIG. 6 is a simplified longitudinal cross-sectional view of a dewatering sieve device 35 according to another embodiment of the present invention, in which parts corresponding to those in the previous embodiment are given the same reference numerals. It should be noted that instead of the vibrating means for vibrating the sieve strips 12, the power of the vibrating conveyor 36 is used as a discharging means. The vibrating conveyor 36, which serves as both a discharge means and a vibration means, has a chute 38 which is inclined diagonally downward from the inside of the rung 3, and through which the coarse particles in the chute 38 are discharged to the outside. and a suspension line 41 having a spring 40 that vibrably supports the chute 38 in a fixed position.

The power of the oscillator 39 is transmitted to the casing 3 via the transmission member 42.
The vibration is transmitted to the sieve net 12 stretched within the interior of the screen 7, and the sieve net 12 vibrates back and forth.

The casing 37 is supported with an oblique axis by rotatable support rollers 43 arranged at intervals in the circumferential direction. One ends of a plurality of support rods 44 are fixed to the inner wall of the casing 37 at intervals in the circumferential direction. Support rod 4
The other end of 4 is fixed to one end of a rotating shaft 45. This rotating shaft 45 has an axis extending from the axis of the casing 37 . A sprocket wheel 46 is fixed to the rotating shaft 45, and is rotated by a power source (not shown), so that the casing 37 is rotated. The rotating shaft 45 is supported by a bearing 47 that receives thrust force and radial force. The periphery of the sieve screen 12 is fixed to the inner wall of the casing 37 in the same manner as in the previous embodiment. A raw solution to be treated containing coarse particles to be filtered is supplied to the upper side of the axis of the casing 37 with respect to the screen 12 through the supply pipe 25 . In this embodiment, the conveying member 26 is curved to ensure reliable conveyance of coarse particles. The other configurations are similar to those of the previous embodiment.

In another embodiment of the present invention, a chain conveyor, a belt conveyor 1, etc. suitable for the nature of coarse particles may be used as the discharge means.

In the embodiments described above, the backwashing means 19 was configured to blow out compressed air, but in other embodiments of the present invention, backwashing may be performed by injecting water.

In the embodiments described above, the rotation of the casing 11 was carried out via a chain, but as in other embodiments of the present invention, the casing 11 may be provided with a rotating shaft, or the casing 11 may be rotated. A girth gear may be provided on the outer periphery, and the drive may be driven by a gear meshing with the girth gear, or other configurations may be used.

As described above, according to the present invention, the undiluted liquid to be treated is used to form a water head and the pressure thereof is used for sieving, so that in combination with the vibration of the sieve net, sieving is achieved effectively, and the sieve amount is Your abilities will improve.

[Brief explanation of the drawing]

FIG. 1 is a simplified vertical cross-sectional view of a deliquid sieving device 1 according to the prior art, and FIG. 2 is a delitting sieve device 10 according to an embodiment of the present invention.
The vertical cross-sectional view of FIG. 3 is along the section line lll-11 [
4 is a sectional view of the bearing 28 shown in FIG. 2, FIG. 5 is an enlarged view of section V in FIG.
The figure is a longitudinal sectional view of another embodiment of the invention. 10.35... Deliquid sieve equipment ffi, ll, 37...
- Casing, 12... Sieve net, 15... Screw conveyor, 16... Vibration means, 19... Backwashing means, 20... Rotation drive means, 26... Conveying section side, 36
... Lifting Conveyor Agent Patent Attorney Kei Nishi Figure 1 Figure 2 U Figure 4 Figure 5 Figure 6

Claims (3)

[Claims] (1) A casing that has an axis that extends horizontally and has openings formed at both ends in the axial direction, and a raw solution to be treated containing coarse particles is supplied from one opening, and rotation that rotates the casing around the axis. a drive means, a sieve screen stretched over the other opening of the casing, a vibration means for vibrating the sieve screen, and inserted through the one opening of the casing,
a discharging means for discharging the screened coarse particles to the outside of the casing; and a conveying member extending and projecting from the inner peripheral surface of the casing along the axis and conveying the coarse particles to the discharging means as the casing rotates. A deliquid sieving device characterized by comprising: (2) The liquid removal sieving device according to claim 1, wherein the discharge means is a vibrating conveyor, and the vibration of the vibrating conveyor is also used as the vibrating means. (3) A dewatering sieve device according to claim 1 or 2, characterized in that a backwashing means is provided on the opposite side of the sieve screen from the discharge means and facing the sieve screen.