JP3628121B2 - Screw dehydrator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a screw dehydrator that dehydrates slurries such as cocoons crushed by a disposer and discharges them as solids.
[0002]
[Prior art]
Such a screw dehydrator is provided with a screw inside a screen cylinder fixed in the machine frame, and has a push lid pressed by a spring in the opening at the top of the screen cylinder, and is supplied from below the screw. Is compressed in a screen cylinder, dehydrated and solidified, and discharged from the gap where the upper push lid is pushed up, but the solid matter solidified by the fibers in the slurry is released from the gap in the opening. It is no longer discharged and is further compressed and hardened in the screen cylinder, which has the drawback of preventing the rotation of the screw and burning the drive motor and making repairs cumbersome. Without pressing with a spring, it is attached with a hinge, the tip of a lever that protrudes on the opposite side of the push lid across the hinge, and a fixing pin provided on a fixed part above the push lid Is pressed against the pull cap pressing spring mounted between, configured as the pressing force of the pressing lid by the spring tension by opening pushes the lid is reduced, are shown which facilitate the discharge.
[0003]
[Problems to be solved by the invention]
In this way, in the case where solid matter pushes up the push lid by the push-up force by the screw and discharges, the gap is adjusted by the movement of the push-lid by discharge, so when the push-lid is pushed up, the pushing force by the spring is reduced. However, when strong and long fibers such as cabbage are mixed and hardened, it is not possible to sufficiently discharge from the narrow outlet by simply reducing the pressing force of the push lid, When the gap is increased by excessively pushing up, there is a problem that the compression force by the screw is lowered and the dehydration is not sufficiently performed.
[0004]
[Means for Solving the Problems]
The present invention forms a pressing surface that contacts the solid material of the push lid in a conical shape, makes the contact surface with the solid material easy to be discharged, and discharges when the load on the screw becomes excessive. While adjusting the gap, the push lid is rotated in the rotational direction of the screw.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The push lid provided in the opening of the upper part of the screen cylinder of the screw dehydrator has a conical concavity that makes contact with the solid matter in the screen cylinder so that the contact surface is inclined so that the solid matter can be easily discharged. The support bar is rotatably supported, the upper end of the support bar is engaged with a lever that is pushed down by a tension spring, and the push lid is pressed against the opening. When it becomes larger, the support bar is rotated in the same direction as the screw, and the pressing surface that contacts the solid matter of the push lid is rotated in the direction of discharge so that the discharge can be easily performed.
[0006]
【Example】
An embodiment in which this is used in a soot processor will be described.
1 is a cocoon treatment machine, which contains a disposer 2 and a screw dehydrator 3 inside. The cocoon sent together with water from the sink 4 is crushed by the disposer 2 and sent to the screw dehydrator 3 to be dehydrated and solidified. Dispose in the form of material.
5 is a machine frame of the screw dehydrator 3, 6 is a screen cylinder, 7 is a screw, 8 is a delivery port, 9 is a drain port, and 10 is a push lid provided in the opening 11 at the top of the screen cylinder. The pressing surface 12 that comes into contact with an object is conical. 13 is a discharge port, 14 is a support rod for the push lid, 15 is a press ring that supports the upper end of the support rod via a bearing, 16 is a lever that has one end attached to a fixed portion, and a pin 17 is attached to the press ring 14. It is connected. Reference numeral 18 denotes a tension spring stretched between the lever 16 and the pin 19 of the fixed portion.
Reference numeral 20 denotes a hollow gear which surrounds the support rod 14 and is engaged only in the rotational direction by a spline, and meshes with a spur gear 22 which is rotated by a motor 21.
[0007]
The soot thrown into the disposer 2 together with water is crushed and sent from the inlet 8 to the screw dehydrator 3, and the screen cylinder 6 is compressed by the rotation of the screw 7 and dehydrated while being dehydrated to the opening 11. The push lid 10 which is fed and is pushed by the tension spring 18 through the lever 16 is pushed up and discharged from the gap of the opening 11.
Solid matter such as relatively soft leftover is smoothly discharged from the gap of the opening 11, but when the fiber is mixed and hardened into a lump in the screen cylinder, it is not discharged from the slight gap of the push lid 10, The push lid 10 is pushed up greatly. However, if the push lid is pushed up excessively, the gap between the opening 11 and the push lid 10 becomes large and a large amount of solid matter is discharged, and the compressive force by the screw 7 is lowered, resulting in a dehydrating effect. In addition to being reduced, a large amount of discharged material flows into the discharge port 13 to cause clogging, and it is necessary to stop the operation and take out the solid material. In particular, fibers such as cabbage are liable to clump and inhibit the rotation of the screw 7. However, a large load is applied to a drive motor (not shown).
[0008]
The solid matter discharged from the opening 11 of the screen cylinder 6 pushes up the push lid 10 with the pushing force of the screw 7 and is discharged in the rotational direction of the screw. The solid matter pushes up the push lid 10 with the push-up force of the screw 7 and adjusts so that the gap between the openings 11 is increased . For example, clogging is detected by an overload applied to the drive motor of the screw 7 and the motor 21 is driven. Then, the hollow gear 20 is rotated via the spur gear 22, and the push lid 10 is rotated in the rotation direction of the screw 7 together with the support rod 14 engaged by the spline. For this reason, the solid matter contacting the push lid 10 receives the rotational force in the discharge direction at the contact portion, and together with the force in the discharge direction of the screw 7 , assists in the rotation of the solid matter in the discharge direction, thereby opening the opening 11. Easily and reliably discharge from the air.
[0009]
The rotation of the support rod 14 is not limited to by a hollow gear which is shown, for example, mounting the spur gear to the support rod, it may be made to engage with the spur gear 22. In addition, as shown in FIG. 2, if radial grooves 23 are provided radially or spirally on the pressing surface 12, the contact portion of the solid material bites into the grooves, increasing the contact resistance, and further effective discharge. Make it.
[0010]
【The invention's effect】
As described above, the present invention makes the pressing surface in contact with the solid matter of the push lid in the screw dehydrator conical, and when the solid load is not discharged and an excessive load is applied to the screw, the push lid is replaced with the screw. Since it is made to rotate in the same direction, even if solid matter mixed with fibers in the screen cylinder becomes a lump and it becomes difficult to discharge, solid matter can be obtained by rotating the push lid in the same direction as the screw. Can be smoothly discharged, the reliability of the screw dehydrator is improved, and the operation can be smoothly performed.
In addition, by providing a groove on the pressing surface of the push lid, the contact resistance with the solid matter can be increased, and the discharging force can be increased.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing an embodiment in which the present invention is used in a soot treating machine.
FIG. 2 is a plan view of a pressing surface showing another embodiment of the push lid.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 厨 芥 processing machine 2 Disposer 3 Screw dehydrator 4 Sink 5 Machine frame 6 Screen cylinder 7 Screw 8 Inlet 9 Drain outlet 10 Pushing lid 11 Opening part 12 Pressing surface 13 Outlet 14 Support bar 15 Holding ring 16 Lever 17 Pin 18 Pull Spring 19 Pin 20 Hollow gear 21 Motor 22 Spur gear 23 Groove

Claims (2)

A screen cylinder mounted in axially fixed to the machine frame, provided with a screw on its inner side, the lid is provided pressing the opening of the discharge side of the screen cylinder, solids are dewatered sent screw, the push In the screw dehydrator that pushes up the lid and is discharged from the gap between the opening and the push lid, the pressing surface that contacts the solid matter of the push lid is formed in a conical shape, and when the load on the screw increases, A screw dehydrator that adjusts the gap to be large and rotates the push lid in the direction of screw rotation. The screw dehydrator according to claim 1, wherein a radial groove is provided on a pressing surface of the push lid.

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