JPH06292997A - Screw type dehydrater - Google Patents

Abstract

PURPOSE:To provide a screw type dehydrater in which whole surface of discharge water screens is surely cleaned by a few pipings. CONSTITUTION:A material to be dehydrated (a) thrown in an annular space 3 from a throw in hole 10 provided on the base end part of an outside cylinder 2 is compressed and dehydrated, the dehydration resulting water is discharged to the outside through the discharge water screen 9 of the outside cylinder 2 and the dehydrated material (a) is discharged to the outside through a discharging port 11 provided on the front end side of the outside cylinder 2 by driving to rotate a ribbon shaped screw 4 arranged in the annular space 3 between the inside and outside cylinders 1 and 2 in a freely turnable state. A piping 5 having a cleaning water ejecting nozzle 5a opposite the discharge water screen 9 is arranged outside the outside cylinder 2 and a piping driving device 12 by which the piping 5 is moved back and forth within a specific angle is provided.

Description

Detailed Description of the Invention

[0001]

The present invention relates to construction sludge, bottom sludge,
The present invention relates to a screw type dehydrator for compressing and dehydrating sludge such as sewage, food, night soil or pulp.

[0002]

2. Description of the Related Art Conventionally, as a dehydrator of this type, an outer cylinder having a drain screen formed in a central portion thereof, an inner cylinder concentrically arranged in the outer cylinder, and an annular space between the inner and outer cylinders thereof. And a ribbon-shaped screw rotatably disposed therein, and by rotating the ribbon-shaped screw, a substance to be dehydrated introduced into the annular space from an inlet provided on the base end side of the outer cylinder. Is dehydrated by squeezing, and the dehydrated water is drained to the outside through the drainage screen, and the dehydrated substance to be dehydrated is discharged to the outside through an outlet provided on the tip side of the outer cylinder,
Further, a large number of pipes are arranged and fixed on the outside of the outer cylinder, and washing water is jetted from the jet nozzle of each pipe toward the drainage screen to wash the drainage screen to remove or prevent clogging. There was something to do.

[0003]

According to the above-mentioned conventional screw type dehydrator, since each pipe is fixed at a fixed position, a large number of pipes are arranged at small intervals in order to wash the entire surface of the drainage screen. Needless to say, the number of pipes is increased, and thus the cost of piping work is high, and it is troublesome to remove the pipes for maintenance.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a screw type dehydrator capable of reliably cleaning the entire surface of the drainage screen with a small number of pipes.

[0005]

In order to achieve the above object, the present invention provides an outer cylinder having a drainage screen formed in the central portion, an inner cylinder concentrically arranged in the outer cylinder, and inner and outer parts thereof. A ribbon-shaped screw rotatably disposed in the annular space between the two cylinders, and the ribbon-shaped screw is driven to rotate so that the ribbon-shaped screw is inserted into the annular space from the inlet provided on the proximal end side of the outer cylinder. The dehydrated substance is squeezed and dehydrated, and the dehydrated moisture is drained to the outside through the drainage screen, and the dehydrated dehydrated substance is discharged to the outside through an outlet provided on the tip side of the outer cylinder. In the dehydrator designed to discharge the water, a pipe having a cleaning water jet nozzle is arranged outside the outer cylinder so as to face the drainage screen, and the pipe drive device rotates or moves the pipe along the outer cylinder. Is provided Than it is.

[0006]

In the above structure, the substance to be dehydrated, which has been charged from the charging port into the annular space between the inner and outer cylinders, is transferred to the discharging port by the ribbon-shaped screw, and the water generated by the compression dehydration is transferred to the outside. The substance to be dehydrated is discharged to the outside through the drainage screen of the cylinder, and the dehydrated substance is discharged to the outside from the discharge port.

Further, the pipe arranged outside the outer cylinder is moved by the pipe drive device along the circumferential direction or the axial center direction of the outer cylinder, and the cleaning water sprayed from the nozzle of the pipe causes the drain screen of the outer cylinder. Since the water is completely washed, it is possible to remove or prevent the clogging of the drainage screen and efficiently squeeze and dehydrate the substance to be dehydrated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a screw type dehydrator which is a first embodiment of the present invention, in which an inner cylinder 1 and an outer cylinder 2 and an annular space 3 formed between the inner and outer cylinders 1 and 2 are provided. And a ribbon-shaped screw 4 rotatably arranged,
A plurality of straight tubular pipes 5 having wash water injection nozzles 5a are arranged outside the outer cylinder 2 and arranged outside the outer cylinder 2, and the pipes 5 are connected to the outer cylinder 2
A pipe driving device 12 that moves along the circumferential direction is provided.

The outer cylinders 2 are arranged concentrically at a predetermined interval.
Multiple cylinders 2₁ ~ 2_Five And each cylinder 2₁ ~ 2_Five Extension
And proximal cylinder 2₁ Located at the base end of the
Tube 2 in the center₁ ~ 2_Five And a through hole 7 concentric with
Support member 8₁ ~ 8_Five And each support member 8₁ ~ 8_Five 
Of the base end side cylinder 2₁ Support members 8 located on both sides of the
₁ , 8₂ And the tip side cylinder 2_Five Support member 8 in contact with_Five Is
Its lower end extends downward and is fixed to the base 6, and the remaining
Support member 8 facing the tube 5₃ , 8_Four Is formed into a ring
Therefore, a gap α through which the pipe 5 can pass is provided between the base 6 and the base 6.
Has been.

[0010] Of the cylindrical body 2 ₁ to 2 _5, the cylindrical body of the front-rear ends 2 _1, 2 ₅ each cylindrical body ₂ 2 21 to _24, except for the number drainage hole 9
The drainage screen 9 made of a is formed, and the proximal end side cylinder body 2 is formed.
_An inlet 10 for the article a to be dehydrated a is formed at 1, and a discharge port 11 for ejecting the dehydrated article a to be externally formed is formed at the opening of the distal end side cylinder ₂₅ . A water receiving tank (not shown) is provided below the outer cylinder 2.

The inner cylinder 1 is formed in a taper shape that expands outward toward the tip side, and the tip part thereof projects outside from the discharge port 11 and is fixed to the machine base 6 via the support frame 13a. At the same time, the base end of the bearing 18 and the seal member 1 are provided in the central through hole of the rotary wheel 16 which is rotatably disposed in the base end side tubular body 2 ₁ via the bearing 14 and the seal member 15.
9 is inserted through the base member 6 and the support member 13b is used for the base member 6
The inner cylinder 1 and the outer cylinder 2 are arranged concentrically with each other. Further, the drain screen 2 including a large number of drain holes 20a in the central portion of the inner cylinder 4 excluding both ends thereof.
0 is formed. The shapes and configurations of the inner cylinder 1 and the outer cylinder 2 of the ribbon screw 4 are not limited to those of this embodiment.

The ribbon-shaped screw 4 has its tip end portion extended to the vicinity of the discharge port 11, and its base end portion is fixed to the rotating wheel 16, and the gear 23 and the drive gear formed on the outer peripheral portion of the rotating wheel 16. The object a to be dehydrated a which is rotated by the screw drive motor 25 via 24 and supplied from the charging port 10 into the annular space 3 is transferred to the discharging port 11.

The cone valve 27, which is slidably fitted over the tip of the inner cylinder 1, is biased toward the discharge port 11 by a spring 28 to adjust the opening degree of the discharge port 11. ing.

Explaining the procedure of squeezing and dehydrating, the inlet 10
The substance to be dehydrated a put into the annular space 3 between the inner and outer cylinders 1 and 2 is transferred toward the discharge port 11 by the ribbon screw 4, but the annular space 3 gradually narrows toward the tip. Therefore, it is squeezed and dehydrated during the transfer, and the water produced by the dehydration is drained to the outside through the drainage screens 9 and 20 formed in the inner and outer cylinders 1 and 2, and
The dehydrated substance a is discharged from the discharge port 11 to the outside.

As shown in FIG. 2, the pipes 5 are arranged at predetermined intervals along the circumferential direction of the outer cylinder 2, and both ends thereof are fixed to the base 6 via the support rods 30. A pair of ring-shaped support frames 31, which are loosely fitted to the outer cylinder 2, are rotatably inserted in through holes 32 formed in the through holes 32.

The pipe driving device 12 includes a rotating ring 33 which is loosely fitted in the center of the outer cylinder 2 with the pipe 5 interposed therebetween, and a long hole 34 formed at the tip of the pipe, which is fixed to each pipe 5. It is arranged between the connecting rod 36 that engages with the pin 35 protruding from the rotating ring 33, the arm 37 protruding from the rotating ring 33, and the base 6, and the rotating ring 33 is rotated at a predetermined angle. The rocking cylinder 38 is configured to reciprocate within a range.

In the above structure, when the swing cylinder 38 is driven to reciprocally rotate the rotating ring 33 (see the phantom line in FIG. 2), each pipe 5 is reciprocally rotated within a predetermined angle range via the connecting rod 36. The cleaning water is sprayed over a wide range from each nozzle 5a, the drainage screen 9 is entirely cleaned, and the clogging of the drainage hole 9a is released or prevented.

As shown in FIG. 1, an inner cylinder side drain screen clogging prevention device 40 is provided in the inner cylinder 1.
This is arranged at a position facing the drainage screen 20 in the inner cylinder 1, and the pipe-shaped screw shaft 41a thereof is disposed in the inner cylinder 1.
A screw 41 rotatably supported by bearings 42 provided at both ends of the sprocket wheel 43a, 43b, a chain 43c, and a gear 4;
It has an interlocking mechanism 43 interlockingly connected to the gear 23 of the rotary wheel 16 via 3d.

In the above structure, when the screw drive motor 25 is driven, the screw 4 is moved through the interlocking mechanism 43.
1 is rotated, the inner surface of the drainage screen 20 is cleaned by the brush 44 provided on the outer peripheral edge of the screw 41, and the cleaning water is jetted toward the drainage screen 20 from the nozzle 45 formed on the screw shaft 41a. The clogging of the hole 20a is released or prevented.

In FIG. 1, reference numeral 47 is a cleaning water supply pump for supplying the cleaning water sucked from the tank 48 to the cleaning water supply pipe 4.
It supplies to each piping 5 and the screw shaft 41a through 9 and the swivel joint 50. Reference numeral 51 is an electromagnetic opening / closing valve connected to each pipe 5 and the screw shaft 41. Further, the tank 48 communicates with a water receiving tank provided below the base 6, and the drained water squeezed and dehydrated is circulated and used as cleaning water.

Explaining the procedure of using the screw type dehydrator, when the substance to be dehydrated a is put into the feeding port 10 and the screw drive motor 25 is driven, it is put into the annular space 3 between the inner and outer cylinders 1 and 2. The dehydrated substance a is transferred to the discharge port 11 by the ribbon-shaped screw 4, is squeezed and dehydrated during the transfer, and the water generated by the dehydration is the drainage screen 9 formed on the inner and outer cylinders 1 and 2. , 20 is drained to the outside and dehydrated, and the dehydrated substance a is discharged from the outlet 11 to the outside.

Further, at the time of squeezing and dehydrating, the rocking cylinder 38 is driven constantly or intermittently so that the nozzle 5 of each pipe 5
Cleaning water is sprayed from a to wash the drainage screen 9, and the clogging of the drainage hole 9a is released or prevented.

Further, by driving the screw drive motor 25, the inner cylinder side drainage screen clogging prevention device 40 is activated, and the inner surface of the drainage screen 20 is cleaned by the brush 44 provided on the outer peripheral edge of the screw 41, and at the same time, the screw is removed. Cleaning water is jetted toward the drainage screen 20 from the nozzle 45 formed on the shaft 41a, and the drainage drainage hole 20a
Clogging is removed or prevented.

In the above structure, the sensor may detect clogging of the drain holes 9a and 20a, and based on the detection signal, the electromagnetic opening / closing valve 51 may be opened to inject the cleaning water. Further, the plurality of electromagnetic on-off valves 51 connected to each pipe 5 may be opened and closed at the same time, but may be opened and closed sequentially. As a result, the wash water supply pump 47
Can be downsized and economical.

In the above embodiment, the support frames 31, 31 are fixed to the base 6 and the pivot ring 33 is pivoted by the pivoting cylinder 38 to pivot the pipe 5, but the pivot ring 33 is used. The pipe 5 may be fixed to the base 6 and the support frames 31 and 31 may be rotated by the swing cylinder 38 to swing the pipe 5 in the circumferential direction of the outer cylinder 2.

Although both the inner and outer cylinders 1 and 2 are fixed and only the ribbon-shaped screw 4 is rotationally driven, both or one of the inner and outer cylinders 1 and 2 are ribbon-shaped screw 4.
It may be rotationally driven separately from. According to this, the shearing resistance of the dehydrated substance a is increased, and the pressing dehydration can be performed more effectively.

3 and 4 show a screw type dehydrator according to a second embodiment of the present invention, in which ring-shaped supporting members 8 ₃ and 8 ₄ of the outer cylinder 2 are provided with guide rollers 52 interposed therebetween. Each pipe 5 is supported by a pair of support rings 53, 53 rotatably engaged with each other, and one support ring 53 is reciprocally rotated within a predetermined angle range by a swing cylinder 38 (see phantom lines in FIG. 4). The pipes 5 are swung in the circumferential direction of the outer cylinder 2, and the cleaning water is sprayed from the nozzle 5a toward the drain screen 9. Note that, as shown in FIG. 3, each pipe 5 and the wash water supply pipe 49 are connected by a flexible pipe 54.

Since the configuration other than the above is almost the same as that of the first embodiment, the same parts are designated by the same reference numerals and the description thereof will be omitted. In the first and second embodiments, a gear mechanism or a chain mechanism may be used instead of the swing cylinder 38 to rotate or swing the pipe 5.

5 and 6 show a screw type dehydrator according to a third embodiment of the present invention, in which a ring-shaped pipe 5 is loosely fitted in an outer cylinder 2 and the pipe 5 Is
Outer cylinder 2 via wheel devices 56, 56 attached to both sides
A pair of guide rails 57, 57 laid on both sides of the guide rail 57, and a navia screw shaft 58a arranged along one guide rail 57 and one wheel device 56.
A pipe driving device 58 is provided, which includes a boat-shaped driven piece 58b that is attached to the Navia screw shaft 58a and engages with the Navia screw shaft 58a, and a drive motor 58c that rotates the Navia screw shaft 58a forward and backward. Then, by rotating the screw shaft 58a of the Navier forward and backward,
The pipe 5 is reciprocated along the axial direction of the outer cylinder 2 via b (see the phantom line in FIG. 5), and the cleaning water is jetted from the nozzle 5a toward the drain screen 9. The pipe 5 and the wash water supply pipe 49 are connected by a flexible pipe 59.

Since the configuration other than the above is almost the same as that of the first embodiment, the same reference numerals are given to the same portions and the description thereof will be omitted. In the above configuration, as the pipe driving device 58, for example, a cylinder device or a chain driving mechanism may be used instead of the screw shaft 58a of Navia.

The present structure can also be applied to the structure of a screw with a shaft, for example.

[0032]

According to the present invention, the pipe arranged outside the outer cylinder is moved by the pipe drive device along the circumferential direction or the axial direction of the outer cylinder, and the cleaning is sprayed from the nozzle of the pipe. Since the drainage screen of the outer cylinder is entirely washed with water, it is possible to surely remove or prevent the clogging of the drainage screen, and to efficiently squeeze and dehydrate the substance to be dehydrated.

Further, since the number of the above-mentioned pipes is smaller than that of the conventional one, the cost of the piping work can be reduced and the maintenance work can be facilitated even when removing the pipes for maintenance. Can be done.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a screw type dehydrator that is a first embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a partially cutaway side view of a screw type dehydrator according to a second embodiment of the present invention.

FIG. 4 is a view taken along the line BB of FIG.

FIG. 5 is a partially cutaway plan view of a screw type dehydrator according to a second embodiment of the present invention.

6 is a view taken along the line CC of FIG.

[Explanation of symbols]

 1 Inner Cylinder 2 Outer Cylinder 3 Annular Space 5 Piping 5a Nozzle 4 Ribbon Screw 9 Drain Screen 10 Input Port 11 Discharge Port 12 Piping Drive Device 38 Swing Cylinder 58 Piping Drive Device 58a Navian Screw Shaft a Dehydrated Material

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshihiro Utsu 5-3 28 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. No. 28 in Hitachi Shipbuilding Co., Ltd.

Claims (1)

[Claims] 1. An outer cylinder having a drainage screen formed in the center thereof, an inner cylinder concentrically arranged in the outer cylinder, and a rotatably arranged annular space between the inner and outer cylinders. A ribbon-shaped screw is provided, and the ribbon-shaped screw is rotationally driven to squeeze and dehydrate the substance to be dehydrated that has been charged into the annular space from the charging port provided on the proximal end side of the outer cylinder, and then dehydrated. In the dehydrator, the water is drained to the outside through the drain screen, and the dehydrated material is discharged to the outside through a discharge port provided on the tip side of the outer cylinder. In the screw type dehydrator, a pipe having a washing water injection nozzle is arranged opposite to the drainage screen, and a pipe driving device for rotating the pipe or moving the pipe along an outer cylinder is provided.