JPH03161058A - Sifting washing device - Google Patents

Abstract

PURPOSE:To ensure the staying of rollers in a washing trunk, even if sifting material is supplied thereinto in a predetermined or larger amt. by providing a blocking part on the outlet side of a screen with a smaller distance between itself and a screen outlet end than the diameter of the roller. CONSTITUTION:A freely-rotatable spanning outer shell 1 is provided with a washing trunk 20 for rotation therewith and the washing trunk 20 is provided with a truncated cone-like screen 24 on its outlet at the end thereof and rollers 25 therein. A blocking part 40 consisting of a blocking member 43 is provided on the outlet side of the screen 24 with a distance between itself and the screen outlet end smaller than the diameter of the roller 25. As a result, even if sifting material is supplied in a predetermined or larger amt., the roller 25 will not be discharged from the washing trunk 20. Therefore, the damage to a sifting dehydrator by the rollers being discharged can be prevented.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a device for cleaning ml residue generated when sewage is subjected to screen treatment in a sewage treatment facility such as a sewage treatment plant, and more particularly to a sieve residue cleaning device having a rotor built into a washing drum.

[Conventional technology]

? A sieve residue cleaning device in which a rotor having a specific gravity of 1 or more, such as a rotor made of a rubber ball or a steel ball, is built into the washing drum has been known (for example, Japanese Utility Model Application No. 106348/1983). In this conventional device, a washing drum that rotates together with the outer drum is provided in an outer drum that is horizontally suspended so as to be rotatable, and a plurality of rotors are built into the washing drum. Therefore, when the washing cylinder rotates, the rotor rotates and is always located at the bottom of the washing cylinder. At this time, when sieve residue is introduced from one end (inlet side) of the washing drum, the sieve residue is agitated by the rotating rotor, increasing the cleaning effect. In other words, deposits such as sand adhering to the sieve residue are efficiently removed by the scrubbing effect of the rotor. The separated deposits such as sand and sieve residue are then transferred from the other end (outlet side) of the washing drum into the outer shell, where they are washed with water and discharged outside the outer shell. On the other hand, the rotor remains inside the washing drum. This retention of the rotor is achieved by a truncated cone-shaped screen installed at the outlet opening of the washing cylinder. That is, since the rotor has a higher specific gravity than the sieve residue or peeled material, it cannot cross the slope of the screen, and as a result, the rotor remains in the washing drum.

[Problem to be solved by the invention]

However, although the rotor of the above-mentioned conventional device is retained in the washing drum by a truncated cone-shaped screen, when more than a specified amount of sieve residue is supplied into the washing drum,
There was a drawback that the rotor passed over the screen and was discharged from the outlet side of the washing cylinder together with the sieve residue. That is, the inclination angle of the screen for retaining the rotor in the washing cylinder is determined based on the throughput per unit time in the washing cylinder. In other words, it is designed so that the sieve residue and peeled materials can be discharged from the outlet side of the washing cylinder, and the rotor can remain in the washing cylinder. However, for some reason, more sieve residue than the specified amount may be supplied to the washing drum. In this case, the angle of inclination of the screen is such that the rotors can no longer be retained in the washing drum, and the rotors are discharged together with the sieve residue. In addition, the discharged rotor is sent to a sieve residue dehydrator,
If a rotor with a large specific gravity was placed into the dehydrator, it could cause the dehydrator to become unbalanced and cause damage to the dehydrator. Therefore, the present invention has been made to solve the above-mentioned problems.The purpose of the present invention is to prevent the rotor from moving into the washing drum even if more than a specified amount of sieve residue is supplied into the washing drum. The purpose of the present invention is to provide a sieve residue cleaning device that can reliably retain the residue.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a washing cylinder which is provided in an outer cylinder horizontally suspended so as to be rotatable so as to rotate together with the outer cylinder, and has a truncated conical screen at the outlet end of the washing cylinder. In a sieve residue cleaning device having a rotor built into the washing drum, a blocking portion is provided at the outlet opening of the screen with a spacing between the outlet end and the diameter of the rotor smaller than the diameter of the rotor. It is characterized by

[Effect]

In the above configuration, the blocking portion acts to catch the rotor that is about to be ejected from the exit side of the screen.

【Example】

An embodiment of the device of the present invention will be described below based on the drawings. FIG. 1 is a longitudinal cross-sectional view of an embodiment of the device, in which an outer body 1 has tires 2a, 2b on both outer peripheries thereof, and these are placed on rollers 4a, 4b provided on a frame 3. ．． A pair of rollers 4a and 4b are provided, and tires 2a and 2b are mounted at two locations each. A sprocket 5 is provided on the outer periphery of the center of the outer body 1, and a chain driven by a motor (not shown) is stretched around the sprocket 5. Further, at one end (right end) of the outer body 1, there is provided an end plate 8 having an opening 6 in the center and a raking blade 7 opened inward. Also, at the other end (left end), there is a guide f! formed by a truncated cone-shaped screen placed inside so as to surround the screen described below. has J9,
A guide strip 10 formed of a cylindrical screen on the outside,
An end plate 13 is provided which has a truncated cone-shaped guide WI11 arranged so as to surround the guide tube 10, and which has an opening 12 in the center having a larger diameter than the opening 6 of the outer body 1.
Furthermore, a screw blade 14 is provided on the inner wall of the outer shell 1, and semicircular plates 14a, 14a are provided on the right half of this screw blade. The laundry 1rl20 has a smaller diameter than the outer barrel 1, and has a length approximately half that of the outer barrel 1, and is fixed to the right side of the outer barrel 1 by support members 21, 21, . . . . This laundry 1
One end of the rl20 (inlet I\IJ) has an end plate 23 with an opening 22 having approximately the same diameter as the opening 6 described above, and a truncated cone-shaped screen is provided on the outside of the other end (exit opening). 24 are provided. Inside the washing cylinder 20, a plurality of spherical rotors 25 made of a material with a specific gravity of 1 or more, such as rubber or metal, are built-in. Covers 30 and 31 on the inlet and outlet sides of the outer shell 1, respectively.
is provided. The inlet measuring cover 30 has a sieve residue supply port 3.
2. A wash water supply pipe 33 and a sand discharge port 34 are provided. Fl! ! On the other hand, a cleaning water supply pipe 35 and a blocking part 40 are provided inside the mounting lid 32 of the outlet measurement cover 31. The blocking section 40 forms the main part of the present invention, and is the second
As shown enlarged in FIG. 3 and FIG.
A pair of pipes 41a extending in the axial direction of the outer FUl,
4lb and a rod 4 inserted telescopically into this pipe.
2a. 42b, and a blocking member 43 provided at the tips of these bars. In addition, in the figure, 44a and 44b are reinforcing members that reinforce the attachment of the blocking member 43 to the bars 42a and 42b, and 45, 45... are reinforcing members that reinforce the attachment of the blocking member 43 to the bars 42a and 42b,
These are bolts for fixing the rods 42a and 42b inserted into 1a and 4lb. The blocking member 43 has an outer periphery @4 extending along an arc having a common center with the lower arc of the outlet end 24' of the screen 24.
3', and a positional relationship that forms a gap smaller than the diameter of the rotor 25 between the outer peripheral end 43' and the outlet end 24' of the screen 24, that is, a gap from which the rotor 25 is not ejected from the screen 24. It has been done. Therefore, the pipes 41a and 4lb are positioned and fixed to the mounting lid 32 with this gap, and the rods 42a and 42b are
The length of the batten can be determined. The blocking member 43 needs to have a shape that prevents the rotor 25 from passing through and does not prevent the sieve residue from passing through, and is also desirably a shape that allows material savings. Considering this point, the blocking member 43 may be a single notched ring (arc)-shaped plate as shown in FIG.
As shown in the figure, a plurality of arc-shaped plates 43 with different radii
a, 43b with a spacing smaller than the diameter of the rotor 25 from the connecting plates 46a. 46b may be used. Such blocking members are attached to the tips of the bars 42a, 42b in a state perpendicular thereto. Next, the operation according to the above-mentioned Yokosei will be explained. Now, the outer shell 1 is rotated in a predetermined direction by the chain attached to the sprocket 5. At this time, when the sieve residue is introduced from the sieve residue supply port 32 into the inlet opening of the rotating washing drum 20,
The input sieve residue is disturbed by the rotor 25, and deposits such as sand (hereinafter referred to as "sand") are efficiently peeled off and moved to the outlet side. Then, the sand falls into the outer shell 1 through the openings of the screen 24, and the sieve residue is discharged into the guide tube 9 through the gap between the outer peripheral end 43' of the blocking plate 43 and the outlet end 24' of the screen 24. Ru. Note that the rotor 25 is retained within the washing drum 20 due to the inclination of the screen 24. At this time, more than a specified amount of sieve residue is fed from the sieve residue supply port 32, and the sieve residue is transferred to the rotor 25 or the outlet end 24' of the screen 24.
If the rotor 25 is pushed out to
(see figure). The sieve residue received in the guide tube 9 is transferred to the cylindrical screen 10 through the opening 12. Here, the sieve residue is washed with water sprayed from the washing water pipe 35, and then sent out from the sieve residue outlet 37 to a dehydrator (not shown), where it is dehydrated. The cleaning wastewater drained by the cylindrical screen 10 is sent back through the drain port 36 to a sewage treatment device (not shown) for treatment. The sand in the outer shell 1 is moved by the screw blades 14 in the direction shown by the solid arrow A, that is, toward the sieve residue supply circle. During this movement, the cleaning water supplied from the cleaning water pipe 33 to one end of the outer shell 1 is flowing toward the other end of the outer shell 1 (see dashed line B in Figure 1), so the sand and the washing water flow in countercurrent flow. Cleaned on contact. Further, since the sand is disturbed by the plate 14a, cleaning is further promoted.The washed sand is transferred to the sand discharge port 34 by the raking blade 7. Note that the wastewater from which the sand has been washed is discharged from the drain port 36 together with the wastewater from which the sieve residue has been washed. As described above, in the device of this embodiment, the screen 2
Since the blocking part 40 is provided on the outlet side of the washing cylinder 4, even if the amount of sieve residue supplied exceeds the specified value, the rotor 25 will not discharge it from the washing cylinder 20''. This prevents the inconvenience of damaging the machine. Furthermore, when the blocking plate 43 of the blocking section 40 is divided into parts as shown in Fig. 4, the excess sieve residue thrown in can be efficiently discharged from the gap. Therefore, it is possible to quickly deal with abnormal feeding.Also, the blocking member 43 (notched ring shape is used, but it may also be a complete ring shape, but if it is notched ring shape, the material cost can be reduced. ．．

[Effect of the idea]

The device of the present invention is provided with a blocking part on the exit side of the screen that blocks only the discharge of the rotor, so even if the amount of sieve residue supplied exceeds the specified amount, the rotor will not be discharged from the washing drum. ．． Therefore, the inconvenience of the ejected rotor damaging the sieve residue dehydrator is prevented.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing one embodiment of the device of the present invention, Fig. 2 is an enlarged view of the blocking part, Fig. 3 is a right side view of Fig. 2, and Fig. 4 is another example of the blocking plate. This is a surface measurement diagram showing. DESCRIPTION OF SYMBOLS 1... Outer cylinder, 20... Washing cylinder, 24... Screen, 25... Rotator, 40... Blocking part.

Claims (1)

[Scope of Claims] A washing cylinder is provided in an outer cylinder horizontally suspended so as to be rotatable so as to rotate together with the outer cylinder, and a truncated cone-shaped screen is provided at the outlet end of the washing cylinder. A sieve sludge cleaning device having a built-in rotor, characterized in that a blocking portion is provided on the exit side of the screen with a gap smaller than the diameter of the rotor between the screen and the outlet end thereof. cleaning equipment.