JPS6362320B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to a screw press dewatering machine used for dewatering sewage sludge, various industrial wastewater sludge, etc., or solid-liquid separation in the manufacturing process of various products. In particular, the present invention relates to a screw press dehydrator having multiple rows of screws.

[Conventional technology]

The screw press dewatering machine has a fixed plate and a sliding plate arranged alternately with each other, and the screws are passed through the through holes of the fixed plate, and the material introduced into the gap between the through hole and the screw is transferred to the sliding plate. It is configured to extract juice and dehydrate by sliding. An example of the conventional technique is that disclosed in Japanese Patent Publication No. 59-20438.
In this technique, the through hole in the sliding plate through which the screw passes is formed to be larger than the through hole in the fixed plate, and these are engaged eccentrically, and the material to be treated is dehydrated by eccentric circular movement of the sliding plate. It is formed like this.

[Problem that the invention seeks to solve]

In order to effectively squeeze and dewater the processed material, it is necessary to determine how the screw and sliding plate penetrate into the processed material, how to feed the processed material according to changes in the state of the processed material, and how to feed the processed material into the processed material. It is necessary to consider measures such as preventing adhesion. Although the above-mentioned conventional technique is somewhat effective, it has the disadvantage that the biting is not sufficient and slipping occurs between the outer periphery of the screw and the object to be processed.
In addition, in the initial state of dehydration, the material to be processed is soft and can be squeezed and dehydrated with relatively little power, but on the discharge side when dewatering has progressed, an extremely large force is applied, requiring a large motor power, and the screw is damaged. This was considered a problem in some cases.

The present invention solves the above-mentioned drawbacks and problems, and is equipped with a plurality of screws that improve the efficiency of squeezing and dewatering the processed material, and also have excellent reliability, energy saving, and weight reduction. Our objective is to provide a screw press dehydrator.

[Means for solving problems]

For this purpose, the present invention provides a plurality of rows of screws, and a through hole surrounding the outer periphery is provided in a fixed plate and a sliding plate, and the workpiece is squeezed by the sliding of the sliding plate and the rotation of the screw. This constitutes a screw press dehydrator equipped with a plurality of screws designed to extract juice and water.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 1, the two screws 1 and 2 are
It is arranged along the entire longitudinal length of the machine. A large number of fixing plates 3 are fixed on the main body 5 as shown in FIG. 3, and fixed to each other by rods 6 or the like. Fixed plate 3
A gourd-shaped through hole 7 through which the screws 1 and 2 can pass is formed. Note that a gap 8 (see FIG. 1) is appropriately formed between the through hole 7 and the screws 1 and 2. In addition, the blades 1A and 2A of the screws 1 and 2 are
It is preferable that they are placed at different positions, and that the shaft becomes gradually thicker from the input side to the outlet side.

As shown in FIGS. 1 and 2, sliding plates 4, 4
A are arranged alternately adjacent to the fixed plates 3, and the sliding plates 4 and 4A are integrally connected by rods 9. A through hole 10 is formed in the center of the sliding plates 4, 4A. The through hole 10 is formed in a shape similar to and larger than the through hole 7 of the fixed plate 3, and is arranged eccentrically as a whole. An eccentric cam 12 having a rotating shaft 11 is fitted into the sliding plate 4 , and one of the rotating shafts 11 is rotated by a motor 13 . Note that the rotating shaft 11
is pivotally supported on the main body 5 side by a bearing 14 or the like. The rotation of the motor 13 causes the eccentric cam 12 to rotate, causing the sliding plates 4, 4A to perform an eccentric circular motion.

In this embodiment, the plate group consisting of the fixed plate 3 and the sliding plates 4 and 4A is formed from four blocks and is operated by a common rotating shaft 11, or is operated by a separate motor 13A, etc., as shown by the two-dot chain line, for example. may be provided and driven separately.

As shown in FIG.
6 etc. are simultaneously rotated. Also, Sukuriyu 1 and 2
is formed with a taper that widens toward the outlet 18 side, and small screws 1B and 2B are provided on the outlet 18 side for smooth discharge of the material to be treated.

Next, the operation of the embodiment will be explained.

The object to be processed inputted from the input port 17 is forcibly, smoothly and quickly fed while being bitten by the blades 1A and 2A of the screws 1 and 2 and the taper, and advances toward the outlet 18 side. Also, blades 1A, 2
By means of A, solid matter such as dirt in the object to be processed, which tends to adhere to the screws 1 and 2, is peeled off and the screws move forward.
Since the screws 1 and 2 are in mesh with each other, there is no slippage between the screw and the workpiece compared to when there is only one screw, and the workpiece is fed efficiently, and sufficient bite is provided as described above. At the same time, the object to be processed is fixed plate 3
The juice is squeezed and dehydrated by the sliding plates 4 and 4A. That is, as shown in FIG. 4, the through hole 7 of the fixed plate 3 and the through hole 10 of the sliding plate 4 are connected by a solid line,
It engages in an eccentric state as shown by the dotted line, one-dot chain line, and two-dot chain line. Therefore, the object to be processed between the stationary plate 3 and the sliding plate 4 is pressed from multiple directions and is given bite. This ensures sufficient juice extraction and dehydration.

As described above, due to the feeding and biting motions by the screws 1 and 2 and the biting motion caused by the eccentric movement between the fixed plate 3 and the sliding plate 4, the material to be processed is given sufficient biting and feeding to the outlet 18.
It is sent to the side and discharged from the outlet 18 in a solid state.

In this embodiment, the through holes 7 and 10 surrounding the screws 1 and 2 are shaped like gourds as described above, and as shown in FIG.
This is to give a strong bite to the object to be processed. However, as shown in FIG. 5, the shape of the through holes 7A, 10A is not necessarily limited to the gourd shape, but may be other shapes, for example, oval shapes. However, the oval shape has a gap 20 in the center, so the protrusion 19
It is desirable that the through hole 13 be shaped like a gourd. In addition, when a plurality of motors 13 are provided (such as motor 13A), the motor 13A that operates the sliding plates 4, 4A of the block near the input port 17 should be of relatively low power, and It is also desirable to use a high-powered device to reduce power consumption. In other words, input port 1
The material to be processed near 7 has a high water content and is soft, so it is easy to squeeze and dewater with relatively low power.
This is because it is solidified on the outlet 18 side and requires a large amount of power. Also, the fixed plate 3 and the sliding plate 4
The material on the inlet 17 side may be made of synthetic resin, for example, and the material on the outlet 18 side may be made of steel to equalize stress and reduce costs. Further, in this embodiment, two screws 1 and 2 and corresponding through holes 7, 10, 7A, and 15A are formed, but the invention is not limited to this, and a plurality of screws and through holes that engage with the screws may be formed. It can be something.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, sufficient juice extraction and dewatering can be performed, processing efficiency can be improved, energy saving and weight reduction can also be achieved, and reliability can be improved.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the overall structure of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line -- in FIG.
The figures are a cross-sectional view taken along the line -- in Fig. 1, Fig. 4 is an explanatory drawing explaining the action between the sliding plate and the fixed plate of the embodiment, and Fig. 5 is a sectional view taken along the line -
The figure is an explanatory diagram illustrating the operation of the embodiment in different through holes of the sliding plate and the fixed plate. 1, 2... Screw, 1A, 2A... Feather, 1B,
2B... Screw, 3... Fixed plate, 4, 4A... Sliding plate, 5... Main body, 6, 9... Rod, 7, 10... Through hole, 8... Gap, 11... Rotating shaft, 12... Eccentric cam,
13, 13A, 15...Motor, 14...Bearing, 16
...Pulley, 17...Inlet, 18...Outlet, 19...Protrusion, 20...Gap.

Claims (1)

[Claims] 1. Screws are passed through the through holes of a large number of fixed plates and sliding plates arranged alternately in contact with the fixed plates,
In the screw dehydrator which introduces the processed material into the gap between the screw and the through hole and dewaters it by sliding the sliding plate, the screw is constructed from a plurality of rows, and the screw is composed of a plurality of rows. A screw press dewatering machine equipped with a plurality of screws, characterized in that the through hole is provided surrounding the outer circumference of the screws with an appropriate gap therebetween.