JPS63147510A - Automatic strainer - Google Patents

Abstract

PURPOSE:To obtain an inexpensive strainer of high efficiency and of simple structure by preliminarily cutting and pulverizing the foreign matter in the liquid to be filtrated in the liquid influent side of a cylindrical porous element and introducing it with liquid to the inside of the element for filtration. CONSTITUTION:The foreign matter in the liquid is cut and pulverized by the coaction of rotary blades 311 of a grinding impeller 31 and fixed blades, that is, blade tips 332 of a grind ring to be made into pulverized material of small particles, which is flowed with the liquid into the inside of the cylindrical porous element, and the filtrate is discharged to the outside through a discharge pipe 8. And the foreign matter once caught by the element 3 is exfoliated by a brush 41 of a scavenging member 4, and the exfoliated material and other foreign matter are smoothly moved by screw blades of scavenging member 4, and discharged to the outside through a caught solid matter discharge passage 44.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a strainer for liquids such as domestic wastewater, crude oil, heavy oil, various chemical solutions, and waste liquids used for automatic cleaning of various gases. The present invention relates to an automatic strainer suitable as a strainer for the suction part of a commercial pump.

[Conventional technology]

Conventionally, as a rotating strainer, a cylindrical porous element is fixedly installed in the casing, and a cleaning member is used to scrub the inner circumferential surface of the element to remove and discharge the trapped substances from the element. A device equipped with a rotating brush for use is known.

[Problem that the invention seeks to solve]

However, the conventional automatic strainer described above has the following problems.

(1) It is difficult to smoothly remove large foreign objects such as cloth, plastic film, wood chips, etc., and fibrous foreign objects such as hair and lint out of the element using the cleaning member, and especially fibrous foreign objects can be removed using the rotating brush. It is easy to get stuck in the gap between the element and the element. For this reason, the liquid passage hole of the element is blocked by the foreign matter, and the filtration function of the element is significantly reduced, and the cleaning member drive motor is frequently overloaded due to malfunction of the cleaning member, and the liquid accompanied by the foreign matter is Difficult to use in application.

(2) When this strainer is connected to the discharge side of a pump for transferring excess liquid, a special pump that can smoothly transfer foreign matter is required as the transfer pump, resulting in high equipment costs and maintenance. It's a hassle.

In order to filter the liquid accompanied by the foreign matter, a grinder impeller pump (see Japanese Patent Application Laid-Open No. 58-38396, etc.) having a grinder impeller inside the pump suction casing is installed in the liquid, and the discharge of the pump is It is also possible to connect the part with a conventional strainer, but since the pump impeller and the cutting blade for cutting foreign objects are installed on a common shaft, it is difficult to combine the hydrodynamic effect of the impeller and the optimal cutting torque of the cutting blade. In addition, there is a problem in that it is difficult to set the rotation speed of the common shaft.

An object of the present invention is to provide a high-performance, simple-structured, and inexpensive strainer that solves the above-mentioned problems of the conventional strainer.

[Means for solving problems]

In order to achieve the above object, the present invention cuts and crushes foreign matter (solid matter) in the liquid to be treated in advance in the liquid inlet side 81 area of the element, and then introduces it into the element. It is composed of

In the present invention, a cylindrical porous element is fixedly arranged in a casing, liquid is allowed to flow in through an opening at one end of the element, solids in the liquid are captured while flowing through the element, and the permeated liquid is collected. At the same time, the trapped matter is removed by running a cleaning member along the inner circumferential surface of the element, and the trapped matter is discharged through the opening at the other end of the element. 1. A rotary shaft is provided within the element and aligned in the axial direction thereof, with one end thereof protruding outside the opening on the liquid inflow side of the element, and the cleaning member is fixedly disposed on the rotary shaft, while the rotary blade A rotary cutter having a fixed blade is fixed to the protrusion of the rotary shaft, and a fixed cutter having a fixed blade is disposed so as to be able to cooperate with the rotary cutter to constitute a solid matter crushing mechanism on the liquid inflow side, and further The automatic strainer is characterized in that the rotating shaft can be forcibly rotated by a motor.

The solid matter crushing mechanism is disclosed in Japanese Utility Model Application Publication No. 49-6504, Japanese Patent Publication No. 58-38396, or Japanese Utility Model Application Publication No. 1987-38396.
A cutting mechanism having a structure equivalent to or similar to the cutting mechanism provided in the grinder (impeller) pump disclosed in Japanese Patent No. 1-39493 or the like can be applied.

Specifically, for example, as shown in the example of FIG. 1 to be described later, a grinder impeller as the rotary cutter, which rotates integrally with the cleaning member, is attached to the end of the rotating shaft of the cleaning member, and the fixed impeller surrounds the impeller. It consists of a grinder ring (grinder disk) as a cutter.

The method of installing the motor, that is, the rotational drive mechanism of the cleaning member, may be fixed directly or indirectly to the casing as shown in the example in FIG. 1, and the motor shaft may be directly connected to the end of the rotating shaft of the cleaning member. Alternatively, as in the example shown in FIG. 4, the motor may be disposed separately from the strainer, and the rotating shaft of the cleaning member may be rotated via a power transmission mechanism such as a chain or belt.

In any case, the solids in the liquid are crushed on the liquid inlet side of the element, the liquid accompanying the crushed pieces is introduced into the element, and the crushed pieces are transferred to the captured solids discharge side, which is the opening at the other end of the element. It is essential to form a flow path so that the water can be discharged from the opening. For example, in the first example, the liquid inflow channel is formed by the gap between the grinder impeller and the grinder ring (substantially the blade groove 33+ of the grinder ring 33), and the annular gap between the motor (main body) and its fixing frame. , and the opening formed in the frame form a discharge passage for the captured solids.

The cleaning member is used to remove solid matter, that is, trapped matter, captured by the element, which is the strainer body, from the element, and to clean the inner surface of the element, so the tip of the cleaning member approaches the inner circumferential surface of the element. It should be constructed so that it rotates while being in contact with the inner circumferential surface, or preferably in a state in which it is in contact with the inner circumferential surface. In the latter case,
By forming a brush by providing a brush made of a soft material such as nylon at the tip, there is an advantage that the cleaning effect can be increased and damage to the inner peripheral surface of the element can be avoided at the same time.

In the former case, a brush is not particularly necessary, and the entire cleaning member can be made of a metal material. Which of the above methods to adopt may be selected based on the properties of the liquid to be treated and the shape, size, amount, and viscosity of the solids accompanying it, that is, the degree of necessity for cleaning the inner surface of the element.

In addition, the cleaning member can clean substantially the entire inner circumferential surface of the element, and removes liquid (and accompanying solids) within the element.
Although it is important that the element has a shape and size that does not prevent the flow of liquid, it is extremely preferable that the element be able to impart a flow propulsion force to the liquid within the element by rotating in a predetermined direction as in the embodiment. To do this, for example, the cleaning member may be of the type of a screw conveyor, but the shape of the screw blades may be the same as that shown in Fig. 1, or may be of the shape of a ribbon or a cut-out of the outer periphery of the screw. Flight type devices can also be applied. The example in FIG. 3 also has substantially the same function as the screw conveyor.

〔Example〕

To explain each embodiment of the present invention based on the drawings, first, the automatic strainer 1 shown in FIGS. It is configured as follows.

That is, each axial end has a flange 13 and 14, respectively.
A cylindrical porous element 3 is fixedly disposed concentrically within a cylindrical casing 2 having a permeate outflow pipe 8 at an axially intermediate portion thereof, spanning the two flanges.

Furthermore, a rotating shaft 5 is provided concentrically within this element 3, and a screw conveyor type cleaning member 4 is fixedly provided on this rotating shaft. The rotating shaft 5 has a cylindrical shape, and the stay 10 is a cross-shaped plate provided in the central opening of the flange 13. a bearing 11 supported by the stay 10. and a bearing 11 supported by the stay 10. and a bearing 12 supported by a stay 10□ having the same shape and structure. The cleaning member 4 is constituted by equally pinched screw blades whose diameter and therefore the height of the top portion are equal in the axial direction of the rotating shaft 5.
(not shown) and a set screw 21 via a cylindrical boss 20 to the rotating shaft 5, and the top of the screw blade is provided with a screw for rubbing (scrubbing cleaning) the inner circumferential surface of the element 3. A wet brush 41 is attached.

The rotary shaft 5 passes through the center of the element 3, and a grinder impeller 31 is provided at one end thereof, that is, the portion protruding outside the opening on the liquid inflow side of the element 3.
is fixedly provided by a key (not shown) and a set screw 22.

Furthermore, a ring 32 is fixed to the flange 13 by means such as welding, and a grinder ring 33 is fixed to this ring with a hexagon socket head bolt 34, and the grinder impeller 31
It surrounds. Note that the end surface of this grinder ring facing the flange 13 is in close contact with the surface of the flange.

As described above, in this embodiment, the grinder impeller 31 constitutes a rotating blade, and the grinder ring 33 constitutes a fixed blade, and the cooperation of these two blades makes it possible to cut solid materials. (Substantially a semicircular blade 433 formed on the grinder ring 33) forms a liquid inflow channel 35 into the element 3.

On the other hand, a motor 41 for rotating the cleaning member 4 is fixed to the flange 15 via a frame 42, and the element side end of the motor shaft 43 is directly connected to the rotating shaft 5 of the cleaning member 4. The frame 42 has a cylindrical shape, and a plurality of wide openings 42° are formed radially around the motor shaft 43, and the outer peripheral surface of the motor 41 and the frame 42 are formed radially around the motor shaft 43.
and the opening 42. A captured solids discharge channel 44 is formed by this.

Note that 17, 18, and 19 in FIGS. 1 and 2 are bolts and bolts, and the flange 16 provided on the outflow pipe 8 can be connected directly or indirectly to the suction side of the pump. Reference numeral 23 denotes a guard having a very coarse through hole, which is fixed to the flange 13 as necessary, and protects the solid matter crushing mechanism constituted by the grinder impeller 31 and the grinder ring 33 from particularly hard solid matter. It is for the purpose of Also 31. is a rotating blade, 31 and 3
3□ is a cutting edge, 45 is a casing, 46 is a stator, 47 is a rotor, 48 and 48t are bearings, and 49 is a cable.

On the other hand, in the embodiment shown in FIG. 3, an inclined plate type cleaning member 51 is used in place of the screw conveyor type cleaning member in the example shown in FIG. That is, the cleaning member 51 is composed of a flat plate-shaped substrate 52 and a brush 51+ fixed to this substrate, and three brushes are fixedly arranged on the rotating shaft 5.
The board 52 has bolts and nuts 54 attached to a flat mounting bracket 53.
This mounting bracket is attached via a boss 55.
These cleaning members are fixed to the rotating shaft 5 via a
are arranged inclined at the same angle (intersection angle) with respect to the axis of
The tip of the brush is in contact with the inner peripheral surface of the element 3.

In this case, the direction of inclination of the cleaning member 51 with respect to the rotating shaft 5 is such that when the rotating shaft 5 rotates, the flow propulsion force that transfers the liquid in the element 3 from the liquid inlet side to the caught object discharge side is determined. It is important to set it to something that can be given.

Further, the intersection angle θ is set to a value that allows the liquid and accompanying solids to flow as smoothly as possible, taking into account the magnitude of the flow driving force and the flow resistance during liquid flow. be done.

The length and width of the board 52 and mounting bracket 53 (element 3
It is important to give the same consideration when setting the diameter (diameter dimension). In addition, in FIG. 3, 56 is a key, and 57 is a set screw.

Furthermore, in the fourth example, the strainer of the example in Figure 3 is immersed in river water, and a land pump 60 and Morph 0 are installed on land to constitute a water intake device. While the cleaning member 51 is rotated through the element 31, the permeated water is transferred to the land pump 6.
It is designed to be able to suck water by 0 and supply water to appropriate locations.

In addition, 72 and 73 are sprocket wheels,
As the motor 70, an engine-driven type can be used in addition to an electric type. In this embodiment, since the motor is not immersed in the liquid, there is an advantage that maintenance and management of the motor is simple.

In addition, the strainer and transfer pump of the present invention are installed on land, and a fluid inflow pipe (not shown) is connected to the flange 13, and the tip opening of this inflow pipe is immersed in river water to install the water intake device. It can also be configured.

Next, to explain the effects of each embodiment, in the example shown in FIG. 1, foreign matter in the liquid is cut and crushed by the cooperation between the rotary blade 311 of the grinder impeller 31 and the fixed blade, that is, the cutting edge 33g of the grinder ring. The crushed particles become small particles and flow into the element 3 together with the liquid, and the permeated liquid flows out through the outflow pipe 8. During this time, some of the foreign matter in the liquid is captured by the element 3, but since the foreign matter has a sufficiently small particle size, the permeated liquid hole may be blocked by the foreign matter or the cleaning member 4 may be entangled with the foreign matter. Instead, it is accurately removed by the brush 41 of the cleaning member 4, and the filter surface of the element is scrubbed by this brush. Thus, the captured and peeled foreign matter and other foreign matter are smoothly transferred by the screw blades of the cleaning member 4 and are discharged to the outside through the captured solid matter discharge channel 44.

Note that although the configuration of the cleaning member 4 in the example shown in FIG. 3 is different, its operation and effect are the same as in the example shown in FIG. 1.

〔Effect of the invention〕

As described above, in the automatic strainer of the present invention, foreign substances in the liquid are cut and crushed in advance, so the filtering function of the element, the rotation of the cleaning member, and the cleaning effect of the inner peripheral surface of the element are efficient. The practical benefits include that the automatic strainer's operation and maintenance are greatly streamlined, the structure is simple, and the strainer can be provided at low cost. It brings about

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an embodiment of the present invention, Fig. 2 is a right side view of Fig. 1 with the guard removed, Fig. 3 is a partial longitudinal sectional view of another embodiment, and Fig. 4. is a flow sheet showing the mode of use of the example shown in FIG. 1... automatic strainer, 2... casing, 3...
- Element, 4...Cleaning member, 4. ···brush,
5... Rotating shaft, 8... Outflow pipe, io+, 1oz...
・Stay, 11.12...Bearing, 13-I6...Flange, 17-19...Bolt/Nut, 20...
Boss, 21.22... Set screw, 23... Guard,
31... grinder impeller, 31. ...rotating blade,
312...Blade tip, 32...Ring, 33...Grinder ring, 33...Blade groove, 33□...Blade tip,
34...Hexagon socket head bolt, 35...Liquid inflow channel,
41...Motor, 42...Frame, 42. ...
Opening, 43... Motor shaft, 44... Captured solids discharge channel, 45... Casing, 46... Stator, 4
7...Rotor, 48, . 4L...Bearing, 49...
Cable, 51...Cleaning member, 51. ···brush,
52... Board, 53... Mounting bracket, 54... Bolt/Nand, 55... Boss, 56... Key, 57...
...Set screw, 60...Land pump, 70...Motor, 71...Chain, 72.73...Sprocket wheel, θ...Intersection angle.

Claims (4)

[Claims] (1) A cylindrical porous element is fixedly disposed within a casing, liquid is allowed to flow in from an opening at one end of the element, solids in the liquid are captured while flowing through the element, and the permeated liquid is passed through the element. At the same time, the trapped matter is removed by running a cleaning member along the inner circumferential surface of the element, and the trapped matter is discharged through the opening at the other end of the element. In the strainer, a rotating shaft is provided within the element and along the axial direction thereof, with one end thereof protruding outside the opening on the liquid inflow side of the element, and the cleaning member is fixedly disposed on the rotating shaft. , a solid matter crushing mechanism is configured on the liquid inflow side by fixing a rotary cutter having a rotary blade to the protrusion of the rotary shaft, and disposing a fixed cutter having a fixed blade so as to be able to cooperate with the rotary cutter. An automatic strainer further characterized in that the rotating shaft can be forcibly rotated by a motor. (2) The automatic strainer according to claim 1, wherein the permeate outflow opening of the casing is provided with a pipe joint that can be connected to the suction side opening of the liquid transfer pump. (3) The cleaning member is configured in the form of a screw conveyor, and its rotation imparts a flow propulsion force to the solids in the element in a direction from the opening on the liquid inflow side to the opening on the trapped material discharge side. An automatic strainer according to claim 1 or 2, which can provide the following. (4) The automatic strainer according to claim 1, 2, or 3, wherein the cleaning member includes a brush that rubs the inner peripheral surface of the element.