JP3211882U - Filter cleaning device and solid-liquid separation device - Google Patents

Abstract

Provided is a filter cleaning device for cleaning a filter by moving a brush along a filter of a solid-liquid separator without using a chain. The filter cleaning device includes a brush 6 positioned on the secondary side of the filter 2 and a drive mechanism that cleans the filter 2 by moving the brush 6 along the filter 2. The drive mechanism supports a screw shaft 9 extending in parallel with the filter 2, a drive source 10 for rotating the screw shaft 9, and the brush 6, screwed with the screw shaft 9, and along the screw shaft 9 by the rotation of the screw shaft 9. And a slider 11 that moves. The brush 6 moves along the filter 2 by the movement of the slider 11. [Selection] Figure 1

Description

  The present invention relates to a filter cleaning device that cleans a filter of a solid-liquid separation device with a brush, and a solid-liquid separation device including the filter cleaning device.

  Some solid-liquid separation devices include a flat plate-like filter arranged to be inclined with respect to the horizontal, and the solid-liquid mixture is separated into solid and liquid by the filter. Specifically, the solid-liquid separator separates the solid-liquid mixture into a solid and a liquid by flowing down along the filter. The filter is, for example, a wedge wire screen.

  The solid-liquid separation device is provided with a filter cleaning device for cleaning the filter such as removing solids clogged in the separation hole of the filter (for example, the slit of the wedge wire screen). For example, in Patent Document 1, the filter cleaning device includes a brush positioned on the secondary side of the filter and a drive mechanism that moves the brush. The brush is a rotating brush. The drive mechanism cleans the filter by reciprocating along the filter while rotating the brush around its rotation axis.

  In Patent Document 1, the drive mechanism moves the brush back and forth by a chain. However, the chain drive has the following problems.

  The chain will stretch with continued use, which will make the brush movement unstable. Therefore, the chain tension must be adjusted regularly. Also, the chain must be lubricated regularly to maintain smooth operation of the chain.

  Thus, since maintenance is required at short intervals, this solid-liquid separator is not suitable for long-term unmanned operation. Also, grease lubrication is undesirable when handling solid-liquid mixtures related to food.

  In addition, in the case of a large screen, the chain is bent by its own weight, and the movement of the brush becomes unstable.

JP 2003-190889 A

  Accordingly, the present invention provides a filter cleaning device that cleans the filter by moving a brush along the filter without using a chain, and a solid-liquid separation device including the filter cleaning device.

The filter cleaning device according to the present invention is provided in a solid-liquid separation device having a flat plate filter in which a plurality of separation holes are formed.
The filter cleaning device includes a brush positioned on the secondary side of the filter, and a drive mechanism that cleans the filter by moving the brush along the filter.
The drive mechanism supports a screw shaft extending in parallel to the filter, a drive source for rotating the screw shaft, the brush, and screwing the screw shaft, and along the screw shaft by rotation of the screw shaft. A moving slider. The brush moves along the filter by the movement of the slider.

The brush may include a rotation shaft extending parallel to the filter and perpendicular to the screw shaft, and a plurality of brush bristles radially arranged on the outer peripheral surface of the rotation shaft.
The drive mechanism may further include a rack extending in parallel with the screw shaft, and a pinion attached to the rotating shaft and meshing with the rack.

  The drive mechanism may reciprocate the slider along the screw shaft.

The solid-liquid separation device according to the present invention includes a flat plate-like filter having a plurality of separation holes, and separates the solid-liquid mixture into a solid and a liquid by the filter.
The solid-liquid separation device includes the filter cleaning device described above.
The filter is a wedge wire screen having a plurality of wedge wires arranged side by side at a predetermined interval and extending in parallel to each other, wherein the separation hole is a slit formed by the interval between adjacent wedge wires. is there.

  The filter may be disposed to be inclined with respect to the horizontal. And the said solid-liquid mixture may be isolate | separated into the said solid and the said liquid by flowing down the said filter along the inclination of this filter.

  According to the present invention, when the screw shaft is rotated by the drive source and the slider moves along the screw shaft, the brush supported by the slider moves along the filter, and the filter is cleaned. This eliminates the need for a chain and does not cause problems due to the chain.

It is a figure which shows roughly the filter cleaning apparatus and solid-liquid separation apparatus which concern on one Example of this invention. It is a longitudinal cross-sectional view of the filter in the area | region T of FIG.

  Hereinafter, an example of a filter cleaning device and a solid-liquid separation device according to the present invention will be described with reference to the drawings.

  With reference to FIG. 1, the solid-liquid separator includes a casing 1 and a filter 2 supported by the casing 1. The filter 2 has a flat plate shape. The filter 2 is formed with a plurality of separation holes.

  In the embodiment, the filter 2 is a wedge wire screen. As shown in the partial vertical cross-sectional view of FIG. 2, the filter 2 has a predetermined angle θ with respect to the horizontal so that its primary side (stock solution side) faces upward and its secondary side (filtrate side) faces downward. It is arranged at an angle.

  The filter 2 includes a plurality of wedge wires 3 having a wedge-shaped cross section that are arranged side by side at a predetermined interval and extend in parallel to each other. That is, the separation hole is a slit S formed by an interval between adjacent wedge wires 3. The wedge wires 3 are arranged side by side in the vertical direction of the filter 2 (along the inclination of the filter 2), and extend in the horizontal direction of the filter 2. Therefore, the slit S extends in the lateral direction of the filter 2.

  Referring again to FIG. 1, the solid-liquid separator includes a supply tank 4, a chute 5, and a pump (not shown) that supplies the solid-liquid mixture to the supply tank 4. The supply tank 4 and the chute 5 are provided above the filter 2. The outlet of the chute 5 faces the primary side of the filter 2.

  When the solid-liquid mixture is supplied to the supply tank 4 as a stock solution by a pump, it overflows from the supply tank 4 and flows down to the filter 2 through the chute 5. Then, the solid-liquid mixture is separated into a solid and a liquid by flowing down the filter 2 along the inclination of the filter 2. That is, as shown in FIG. 2, when the solid-liquid mixture flows down the filter 2, the liquid of the solid-liquid mixture flows out through the slit S of the filter 2 to the secondary side of the filter 2. Then, the liquid is discharged to the outside as a filtrate through a filtrate discharge port (not shown) of the casing 1. On the other hand, the solid of the solid-liquid mixture cannot pass through the slit S, flows down to the lower end of the filter 2, and further flows down from the filter 2 and is collected by a receiving member (not shown).

  As described above, the solid-liquid separator separates the solid-liquid mixture into solid and liquid by the filter 2. The solid-liquid separator is provided with a filter cleaning device that cleans the filter 2.

  The filter cleaning device includes a cleaning brush 6 and a drive mechanism that cleans the filter 2 by moving the brush 6 along the filter 2.

  The brush 6 is located on the secondary side of the filter 2. The brush 6 is a rotating brush. The brush 6 includes a rotating shaft 7 extending in parallel with the flat filter 2 and a plurality of brush hairs 8 radially arranged on the entire outer peripheral surface of the large-diameter portion (functioning as a brush base) of the rotating shaft 7. Prepare. In the embodiment, the rotation shaft 7 extends in the vertical direction of the filter 2. The position of the brush 6 is adjusted in advance so that the tip of the brush bristles 8 enters the slit S of the filter 2.

  The drive mechanism includes a screw shaft 9 extending parallel to the filter 2 and a motor 10 as a drive source for rotating the screw shaft 9. In the embodiment, the screw shaft 9 extends in the lateral direction of the filter 2, that is, parallel to the slit S. Therefore, the rotating shaft 7 of the brush 6 extends at right angles to the screw shaft 9. The screw shaft 9 is connected to the output shaft of the motor 10 at one end and is rotatably supported by the casing 1 via a bearing member (not shown) at the other end.

  Further, the drive mechanism includes a slider 11 that is screwed onto the screw shaft 9 and moves along the screw shaft 9 as the screw shaft 9 rotates. A bearing member 12 is supported by the slider 11. Of the small diameter portions at both ends of the rotating shaft 7, the small diameter portion at the upper end is inserted into the bearing member 12. Thus, the slider 11 supports the brush 6 so as to be rotatable around the rotation shaft 7 via the bearing member 12, and the brush 6 and the slider 11 move integrally.

  Further, the drive mechanism includes a pair of upper and lower racks 13a and 13b extending parallel to the screw shaft 9, and a pair of upper and lower pinions 14a and 14b that are attached to the small diameter portions at both ends of the rotary shaft 7 and mesh with the racks 13a and 13b. Prepare. The racks 13a and 13b are supported by brackets 15a and 15b, respectively. The brackets 15 a and 15 b are fixed to the casing 1.

  The drive mechanism includes a sliding member 16 attached to the lower surface of the slider 11. The sliding member 16 is in contact with the upper bracket 15 a and slides on the bracket 15 a when moving with the slider 11. By this sliding member 16, the bracket 15a receives much of the weight of the slider 11 and the brush 6, and the load on the screw shaft 9 is reduced.

  Further, the drive mechanism includes a regulating member 17 that is attached to the lower bracket 15b and prevents the lower pinion 14b from being detached from the rack 13b.

  When the screw shaft 9 is rotated by the motor 10, the slider 11 moves along the screw shaft 9. The brush 6 moves along the filter 2 by the movement of the slider 11. At the same time, the brush 6 rotates around its rotation axis 7 by the racks 13a and 13b and the pinions 14a and 14b.

  Thus, the drive mechanism cleans the filter 2 by moving the brush 6 around the rotation shaft 7 and moving it in the length direction of the slit S along the filter 2. That is, the solid sandwiched between the slits S of the filter 2 and the dirt attached to the wedge wire 3 are removed by the brush bristles 8.

  The drive mechanism reciprocates the slider 11 along the screw shaft 9 by forward and reverse rotation of the screw shaft 9. As a result, the brush 6 moves reciprocally along the filter 2.

  For this purpose, a position sensor (not shown) is built in the motor 10, and the position of the brush 6 is detected based on the number of pulses to the motor 10. The drive mechanism moves the brush 6 in the opposite direction by reversing the output shaft of the motor 10, that is, the screw shaft 9, when the position detection sensor detects that the brush 6 has reached a predetermined position. Let

  Note that when the cleaning of the filter 2 is completed, the drive mechanism moves the brush 6 to one end of its moving range and retracts the brush 6.

  As described above, the brush cleaning device moves the brush 6 along the filter 2 by the screw shaft 9 and the slider 11. A chain for moving the brush 6 is not necessary. Therefore, there is no problem due to chain drive.

  That is, the brush cleaning device of the present invention does not require maintenance such as chain tension or grease lubrication on the chain, and the maintenance interval may be extended to withstand long-term unmanned operation. Further, the brush cleaning device of the present invention is suitable for handling a solid-liquid mixture related to food because grease lubrication is unnecessary.

  Further, unlike the chain drive, the brush cleaning device of the present invention can appropriately clean a large filter.

  As mentioned above, although one Example of this invention was described, this invention is not limited to the said Example.

  The filter 2 of the example was a wedge wire screen, and the slit S extended in the width direction of the filter 2. Instead, a wedge wire screen in which the slit S extends in the vertical direction of the filter 2 may be used. In this case, it is preferable that the brush 6 is provided so that the rotating shaft 7 extends in the width direction of the filter 2, and the driving mechanism moves the brush 6 in the vertical direction of the filter 2, that is, along the slit S.

  The filter 2 may be another type of filter such as punching metal instead of the wedge wire screen.

  The solid-liquid separation device of the embodiment is an inclined type in which the separation is performed by the filter 2 arranged to be inclined with respect to the horizontal, but other types may be used.

DESCRIPTION OF SYMBOLS 1 Casing 2 Filter 3 Wedge wire 4 Supply tank 5 Chute 6 Brush 7 Rotating shaft 8 Brush hair 9 Screw shaft 10 Motor 11 Slider 12 Bearing member 13a, 13b Rack 14a, 14b Pinion 15a, 15b Bracket 16 Sliding member 17 Restriction member S Slit (Example of separation hole)

Claims (5)

A filter cleaning device provided in a solid-liquid separation device having a flat filter in which a plurality of separation holes are formed,
A brush located on the secondary side of the filter;
A drive mechanism for cleaning the filter by moving the brush along the filter,
The drive mechanism is
A screw shaft extending parallel to the filter;
A drive source for rotating the screw shaft;
A slider that supports the brush, is screwed with the screw shaft, and moves along the screw shaft by the rotation of the screw shaft;
The brush moves along the filter by the movement of the slider;
The filter cleaning apparatus characterized by the above-mentioned. The brush
A rotation axis extending parallel to the filter and perpendicular to the screw axis;
A plurality of brush bristles radially arranged on the outer peripheral surface of the rotating shaft,
The drive mechanism further includes:
A rack extending parallel to the screw shaft;
A pinion attached to the rotating shaft and meshing with the rack;
The filter cleaning apparatus according to claim 1. The drive mechanism reciprocally moves the slider along the screw shaft;
The filter cleaning device according to claim 1, wherein the filter cleaning device is provided. A solid-liquid separation device that includes a flat plate-like filter having a plurality of separation holes, and separates a solid-liquid mixture into a solid and a liquid by the filter,
A filter cleaning device according to any one of claims 1 to 3,
The filter is a wedge wire screen having a plurality of wedge wires arranged in parallel at predetermined intervals and extending in parallel to each other,
The separation hole is a slit formed by the interval between adjacent wedge wires.
A solid-liquid separator characterized by that. The filter is arranged to be inclined with respect to the horizontal;
The solid-liquid mixture is separated into the solid and the liquid by flowing down the filter along the inclination of the filter.
The solid-liquid separation apparatus according to claim 4.

Images