JPS6019831Y2 - Screw Press - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a screw press that deliquifies livestock manure, human waste, sieve residue, sewage sludge, industrial wastewater sludge, etc. in order to prevent environmental pollution. be.

(Prior Art) A conventional screw press is equipped with a single spiral blade in a screw press casing consisting of a feeding casing and a solid-liquid separation casing.

In order to deliquify the livestock manure etc. mentioned above with this screw press, it is necessary to make both the feeding spiral part and the liquid extraction spiral part of the helical shaft long due to the nature of the target material. In order to prevent the objects to be processed from rotating together, it is necessary to place a resistance rod inside the solid-liquid separation casing, which not only increases the length of the screw press itself but also increases the processing time. Moreover, the structure of the solid-liquid separation casing becomes complicated.

In order to solve such drawbacks, the present inventor first developed a portable solid-liquid separator for processing livestock dung, etc., in patent No. 105.
063 (Special Publication No. 55-46280).

This invention replaces the feed helical portion of the helical shaft of a conventional screw press with a pair of feed helical blades that are provided with a single helical blade whose spiral inclination is opposite to each other, and that are intertwined with each other to rotate in opposite directions. A spiral shaft is used as a spiral shaft, and one of the pair of spiral shafts is connected with a squeezing spiral shaft equipped with a single spiral blade, which increases the pressing force and amount of feeding of the material to be processed. At the rear end of the feed casing, the workpiece fed by the other feed helical shaft enters the workpiece fed by one feed helical shaft to which the liquid squeezing helical shaft is connected. In addition to shortening the overall length of the screw press by performing initial deliquification of the processed material through the pushing and squeezing action when it is forcibly pushed in,
By force-feeding the processed material after initial deliquification into the solid-liquid separation casing, it is intended to prevent the processed material from co-rotating within the solid-liquid separation casing.

(Problem that the invention aims to solve) However, when the material to be processed contains a large amount of fiber, the pressing force when feeding the material from the feed casing to the solid-liquid separation casing is insufficient. It was discovered that this caused a problem in that the material to be processed flowed back from the solid-liquid separation casing into the feed casing.

The present invention has been made in order to improve the above-mentioned disadvantages, and is a screw press that can shorten the overall length of the screw press and can also remove liquid from the processed material containing a large amount of fiber without causing it to flow backwards. The purpose is to provide press.

(Means for Solving the Problems) In order to remotely achieve the above-mentioned object, the present invention provides an infeed casing having a receiving port at the front end and a communication port at the rear end. A pair of feed helical shafts are provided with helical blades having opposite spiral inclinations and rotated in opposite directions, and are arranged horizontally in parallel so that the helical blades intertwine with each other. One of the feeding helical shafts is extended outside the communication port, a single spiral blade is applied to the extended shaft portion to form a liquid sampling helical shaft, and a solid-liquid separation device surrounding the liquid sampling helical shaft is provided in the communication port. In a screw press, the helical blades of the pair of feed helical shafts are each connected to a multi-threaded helical blade having the same number of threads. The single spiral blade of the liquid sampling spiral shaft is connected to one of the multiple spiral blades of the one feed spiral shaft.

(Function) As described above, the number of spiral blades of the pair of spiral blades in the feed casing is large, and the pressing force and feeding amount for feeding the workpiece are proportional to the number of spiral blades. Even if the material to be processed contains a large amount of fiber, it will form a backing at the rear end of the feed casing, and one feed where the liquid sampling helical shaft is connected. The initial deliquification of the processed material is quickly performed by the pushing and squeezing action when the processed material fed by the other spiral shaft is forced into the processed material fed by the helical shaft. After the initial dewatering, the material to be treated is pumped into a casing for solid-liquid separation, and is deliquified by the re-squeezing action of the liquid sampling helical shaft within the casing without receiving any discharge resistance from the resistor.

When re-squeezing the processed material in the solid-liquid separation casing, a part of the processed material tries to flow back toward the feed casing, but the processed material flows into the multi-filament spiral blade at the rear end of the fed casing. A large amount of the material is fed into the material to form a backing shape, and the large pushing force applied by the multi-filament spiral blades completely prevents the material from flowing backwards.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The drawings show an embodiment in which the multiple spiral blades of the feed spiral shaft are replaced with two spiral blades.

In the figure, reference numeral 1 denotes a cylindrical casing having a cocoon-shaped cross section (see Fig. 3). At the front end of the casing, for example, a receiving port for mounting a hopper 2 is formed, and at the rear end, a casing 11 for solid-liquid separation is connected. This is a feeding casing with a communication port opened.

Multi-filament spiral blades 5 and 5' are installed in the feed casing, respectively.
A pair of feed helical shafts 3 and 4 having a diameter of 6.6' and 6.6' are arranged horizontally in parallel, and the inclination of the spiral of the multi-filament spiral blades 5, 5' and 6.6' is shown in Fig. 2. They are opposites of each other and interwoven with each other.

At the portion where the feed spiral shafts 3 and 4 protrude forward from the front end of the feed casing 1, there are interlocking gears 7 that mesh with each other.
8 are attached to rotate the pair of feed spiral shafts 3.4 in opposite directions.

One of the pair of feed helical shafts 3 and 4 is extended to a communication port opened at the rear end of the feed casing 1, and a single helical blade 10 is attached to the extended shaft to collect liquid. There is no spiral shaft 9.

As shown in FIG. 1, the outer diameter of the spiral wing 10 decreases toward the rear end.

A truncated conical solid-liquid separation casing 1 surrounding a liquid sampling spiral shaft 9
1 is connected to a communication port opened at the rear end of the feed casing 1.

Although not shown, the solid-liquid separation casing 11 includes a coarse outer mesh tube, a replaceable fine mesh inner mesh tube, and a discharge port 15 provided at the rear end of the outer mesh tube. The casing 11 includes a plurality of annular plates 13 . supporting the outer mesh tube. ... along the axial direction of the mesh tube and arranged radially. It is attached to the rear end of the feeding casing 1 by a support frame member 12 connected by....

The rear end shaft portion 16 of the liquid sampling helical shaft 9 is connected to the solid-liquid separation casing 1
The rear end shaft portion 16 protrudes rearward from the discharge port 15 of
A resistor 17 that closes the discharge port 15 is slidably attached to the rear end shaft portion 16, and a spring 18 is provided to elastically press the resistor 17 against the discharge port 15. An adjustment nut 19 is screwed in to adjust the pressing force of 18.

A screw press casing consisting of a feed casing 1 and a casing 11 for solid-liquid separation, and a motor 20 with a speed reduction device that drives the feed helical shaft 3 are attached to a machine base 21, and a A liquid collecting tray 22 is arranged.

Incidentally, when the material to be processed is supplied to the receiving port through a feeding pipe, the hopper 2 may be omitted.

The solid-liquid separation casing 11 is not limited to the structure shown in the drawings.

The drawing shows multi-filament spiral blades 5.5' and 6,6' and spiral blade 1.
Although the illustration shows that the pitch of 0 is the same over the entire length of each spiral blade, the pitch may be partially changed depending on the nature of the object to be processed, processing conditions, etc.

When the amount of fiber contained in the material to be processed is large, the number of spiral blades of the feed spiral shaft is set to three or more.

In the screw press of the embodiment configured as described above, when the motor 20 with a reduction gear is driven, the second
In the figure, the feed helical shaft 3 rotates in the direction of the arrow a, and the feed helical shaft 4 is rotated in the direction of the arrow A by the interlocking gears 7 and 8.

Next, the hopper 2 or the other direction is rotated.

Next, the material to be processed, such as livestock manure, is supplied into the receiving port via the hopper 2 or a feed pipe (not shown), and is fed into a feed casing 1, which has a cocoon-shaped cross-section, through a pair of feeds arranged in parallel according to the cross-sectional shape. While being pushed between the helical shafts 3 and 4, it is rapidly sent rearward by the multi-filament helical blades 5, 5', . . . and 6, 6', .

The pressing force and feeding amount for feeding the material to be processed are increased and increased in proportion to the number of spiral blades of the feeding spiral shaft, so even if the material to be processed contains a large amount of fiber, The material to be processed becomes a backing at the rear end of the feed casing 1, and the material to be processed fed in by the feed spiral shaft 4 is forcibly pushed into the material to be processed fed in by the feed spiral shaft 3. The initial deliquification of the object to be treated is performed powerfully and quickly by the pressing and squeezing action.

As described above, by making the spiral blades of the feed spiral shaft multi-threaded, the pressing force and feeding amount for feeding the material to be processed are strengthened and increased, and the initial deliquification of the material to be processed is strengthened.
Since this is done quickly, the length of the feed casing can be shortened.

The material to be treated after the initial deliquification is forced into the solid-liquid separation casing 11 through the communication port by the feed spiral shaft 3 and the liquid sampling spiral shaft 9.

The spiral blade 10 of the liquid sampling spiral shaft 9 is continuous with one spiral blade 5 of the multi-filament spiral blade 5. Since the discharge speed of the material to be treated is not slow and the material to be treated is subjected to discharge resistance by the resistor 17, the material to be treated is re-squeezed in the solid-liquid separation casing 11, and the contained liquid is transferred to the solid-liquid separation casing. 11 and drips into the lower liquid collecting tray 22.

After the liquid has been removed, the object to be treated resists the spring 18, pushes aside the resistor 17, and is discharged from the discharge port 15.

When re-squeezing the processed material in the solid-liquid separation casing 11, some of the processed material tries to flow back toward the feed casing 1, but the processed material does not flow through the communication port at the rear end of the fed casing 1. A large amount of the material is fed by the multi-filament spiral blades 5, 5' to form a backing shape, and the large pressing force for feeding by the multi-filament spiral blades completely prevents the backflow of the material to be processed.

The liquid sampling spiral shaft 9 that rotates at the same rotation speed as the feeding spiral shafts 3 and 4 has a single spiral blade 10, whereas the feeding spiral shaft 3 that feeds the material to be processed into the solid-liquid separation casing 11
, 4 multi-filament spiral wings 5.5',..., 6°6',...
Because of the multiple threads, the amount of feed by the feed spiral shaft 3.4 is greater than the amount of discharge by the liquid sampling spiral shaft 9, and the material being deliquified in the solid-liquid separation casing is continuously solid-liquid. Since a backward pressing force is applied by the backing-like processed material that is force-fed into the separation casing, liquid removal by the liquid sampling helical shaft 9 can be efficiently performed without co-rotation.

(Effects of the invention) The present invention increases the number of threads of the spiral blades of a pair of feed helical shafts arranged horizontally in parallel in the feed casing, so as to strengthen and increase the pushing force and amount of feed. Therefore, even if the material to be processed contains a large amount of fiber, the material to be processed forms a backing shape at the rear end of the feed casing, so initial deliquification is performed powerfully and quickly. This makes it possible to shorten the overall length of the screw press, and furthermore, the large pressing force of the multi-filament helical blades completely prevents the backflow of the material to be processed into the feed casing while it is being deliquid in the solid-liquid separation casing. The material to be processed inside the casing for solid-liquid separation is subjected to a backward pressing force by the backing-shaped material to be processed that is continuously pumped into the casing for solid-liquid separation, so liquid removal is performed efficiently. It is.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention in which the feed spiral shaft is equipped with a double-threaded spiral blade. FIG. 3 is a cross-sectional view taken along line 1-11I in FIGS. 1 and 2. FIG. 1... Infeed casing, 3, 4...
・Feed spiral shaft, 5.5', 6.6'...Multi-filament spiral blade, 9...Liquid sampling spiral shaft, 10...
Single spiral blade, 11...Casing for solid-liquid separation,
15...Exhaust port, 17...Resistor, 1
B...Spring.

Claims (1)

[Scope of utility model registration request] A feeding casing having a reception port at the front end and a communication port at the rear end is provided with spiral blades having opposite spiral inclinations, and are rotated in opposite directions. A pair of feed helical shafts are arranged horizontally in parallel so that the spiral blades intertwine with each other, one of the pair of feed helical shafts extends outside the communication port, and a single helical thread is formed on the extending shaft portion. A blade is applied to form a liquid squeezing spiral shaft, and a solid-liquid separation casing surrounding the liquid squeezing spiral shaft is connected to the communication port,
In the screw press in which a resistor is pressed against the discharge port of the solid-liquid separation casing by a spring, the spiral blades of the pair of feed spiral shafts are each multi-thread spiral blades having the same number of threads, and the one feed A screw press characterized in that one spiral blade of the liquid extraction spiral shaft is connected to any one of the multiple spiral blades of the spiral shaft.