JP2001162114A - Automatic strainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: The provide an automatic strainer for automatically easily discharging the refuse fallen/stacked on the bottom of the filtration chamber of the strainer without stopping the apparatus and giving trouble to an operator. SOLUTION: This automatic strainer is used for removing the refuse by installing it on a pipeline to take in raw water and provided with a housing having an inlet of the raw water connected to the upstream side of the pipeline and an outlet of the treated water connected to the downstream side, a filtration screen member for partitioning the housing to form the inlet side of the raw water as the filtration chamber and the outlet side of the treated water as a treated water chamber, a drain nozzle disposed on the bottom of the filtration chamber and a refuse scraping means for scraping up the refuse stacked on the bottom of the filtration chamber to the drain nozzle side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic strainer provided in an intake pipe for removing foreign substances such as dust.

[0002]

2. Description of the Related Art Conventionally, water, such as water and sewage, seawater, various industrial waters, or process water of general chemical industry, contains various trash such as wood chips, plastic chips, and marine organisms such as shellfish. In order to supply the water to devices and equipment such as a heat exchanger and a condenser, it is necessary to remove the dust, and therefore, the intake pipe is provided with a filter screen member for removing the dust. A strainer is provided.

The strainer includes a housing having an inlet for raw water connected to an upstream side of an intake pipe and an outlet for treated water connected to a downstream side, and a filtration chamber for connecting the inlet of raw water in the housing to the filtration chamber. A cylindrical or arcuate filtration screen member for partitioning the outlet side of the treated water into a treated water chamber is provided. The raw water flows from the filtered chamber side to the treated water chamber side to filter and remove dust. It has become. Further, generally, an automatic strainer having a structure for automatically removing dust caught by the filtration screen member from the filtration screen is often used. A rotary driving means provided on the top of the housing, and a brush which is axially mounted on a drive shaft of the rotary driving means and protrudes in the horizontal direction, and whose tip end slides and rotates on the surface of the filtration screen member on the filtration chamber side. A dust-removing arm equipped with a scraping member such as is provided.The dust caught by the filtering screen member is scraped off with a brush or the like, dropped and deposited on the bottom of the filtering chamber, and the deposited dust is discharged from the drain nozzle. I have.

[0004] Further, the treated water is caused to flow backward, and
Automatic strainers equipped with a mechanism for automatically removing dust trapped in the screen from the filtration screen are also used,
The automatic backwashing strainer described in Japanese Patent Application Laid-Open No. 9-57016 is provided with an inlet for raw water connected to the upstream side of an intake pipe and an outlet for treated water connected to the downstream side on opposite side surfaces. Housing, a slanted partition wall with an opening at the center that defines the inlet of raw water in the housing as a filtration chamber, and the outlet of treated water as a treated water chamber, and a cylindrical opening at the partition wall. A cylindrical filtration screen member vertically disposed via a pedestal, a rotation driving means provided on the top of the housing, and a projection protruding in the horizontal direction which is axially mounted on a driving shaft of the rotation driving means. A hollow dust removing arm whose tip slides and rotates on the surface of the filtration screen member on the filtration chamber side, and a backwash water discharge pipe communicating with the dust removing arm and discharging dust out of the housing. It has.

[0005] In the automatic backwashing type strainer, raw water is circulated from a filtration chamber inside a cylindrical filtration screen to an outside treated water chamber to filter and remove dust, but the dust is continuously removed at a constant speed. Alternatively, in the part where the suction port of the hollow dust removing arm that rotates intermittently is located, the treated water flows back into the dust removing arm from the treated water chamber side to backwash the filtration screen, thereby removing the dust. Discharging the trapped dust out of the housing from a backwash water discharge pipe provided in communication with the system.

[0006]

In the above-mentioned conventional automatic strainer, an automatic strainer having a structure for scraping dust caught by a filtering screen member with a dust removing arm equipped with a scraping member such as a brush. In, the dust accumulated at the bottom of the filtration chamber is discharged from the drain nozzle, but since the inside diameter of the drain nozzle is extremely small with respect to the bottom area of the housing, the dust accumulated around the nozzle becomes insufficiently discharged,
Consolidate at the bottom of the filtration chamber. In order to remove them, there is a problem that it is necessary to stop the operation of the apparatus, open the housing, and manually remove the housing.

[0007] In addition, by using a hollow dust removing arm, the treated water is caused to flow back into the dust removing arm from the treated water chamber side, and a filtering screen is provided.
In an automatic strainer having a structure for removing dust by backwashing the dust, the removed dust is discharged out of the housing from a backwash water discharge pipe provided in communication with the dust removing arm. But,
Dust such as shellfish having a relatively large specific gravity is caught by the filtration screen and simultaneously drops and deposits on the bottom of the filtration chamber, causing the same problem as the automatic strainer equipped with a scraping member such as the brush. Provoke.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an automatic strainer which can easily and automatically discharge dust which drops and accumulates on the bottom of the strainer in the filtration chamber without stopping the apparatus and without trouble. It was made in.

[0009]

According to the first aspect of the present invention, there is provided a strainer provided in a raw water intake pipe for removing dust. A housing having an inlet for raw water connected to the upstream side of the water pipe and an outlet for treated water connected to the downstream side, a filtration chamber on the inlet side of the raw water in the housing, and a treated water outlet on the outlet side of the treated water; A filter screen member formed as a chamber, a drain nozzle provided at the bottom of the filtration chamber, and dust collecting means for scraping dust accumulated at the bottom of the filtration chamber toward the drain nozzle. It is a strainer. With the above-described configuration, dust that has settled and deposited on the bottom of the filtration chamber of the housing is raked in the direction of the drain nozzle by the dust scraper, and is automatically discharged from the drain nozzle to the outside of the housing. Therefore, there is no need to stop operation of the device, open the housing and remove it manually.

[0010] In the second aspect of the present invention,
In a strainer provided in a raw water intake pipe for removing dust, a housing having an inlet for raw water connected to an upstream side of the intake pipe and an outlet for treated water connected to a downstream side of the strainer; A cylindrical filtration screen member which defines the inlet of raw water as a filtration chamber and the outlet of treated water as a treated water chamber, a drain nozzle provided at the center of the bottom of the filtration chamber, and provided at the top of the housing And a dust removing arm having one end axially mounted on the drive shaft of the rotary drive means and protruding in the horizontal direction, and having a tip end slidably rotating on the surface of the filtration screen member on the filtration chamber side. A rotating shaft extending from the lower end of the shaft of the dust removing arm, and a plurality of rakes extending radially from the tip of the rotating shaft in the horizontal direction and extending to near the inner wall of the housing. Protruding downward at regular intervals in the horizontal direction of the arm and rake Is, tip multiple records that scrape dust slides rotating the bottom of the housing in Doren'nozuru direction - a na - Automatic stress, characterized in that arranged the dust scraper means consist of a key. With the above configuration,
The dust caught by the filter screen member is scraped off with a dust removing arm, and the dust accumulated at the bottom of the filter chamber is discharged from the drain nozzle, so that the filter screen member can be prevented from being blocked for a long time. Therefore, the operation can be continued for a long time. In addition, dust that has been scraped off by the dust removal arm and deposited on the bottom of the housing is scraped by the dust scraper in the direction of the drain nozzle and is automatically discharged out of the housing from the drain nozzle. There is no accumulation, so there is no need to shut down the device and open the housing to remove it manually.

Further, in the invention according to claim 3,
In a strainer provided in a raw water intake pipe for removing dust, a housing having an inlet for raw water connected to an upstream side of the intake pipe and an outlet for treated water connected to a downstream side on opposite side surfaces. A filtration chamber on the inlet side of the raw water in the housing, an inclined partition wall provided with an opening in the center section defining the outlet side of the treated water as a treated water chamber, and a drain nozzle provided at the center of the bottom of the filtration chamber. A cylindrical filter screen member vertically disposed at the opening of the partition wall via a cylindrical pedestal, a rotary driving means provided at the top of the housing, and a shaft mounted on a drive shaft of the rotary driving means. And a hollow dust-removing arm that is protruded in the horizontal direction and whose tip slides and rotates on the surface of the filtration screen member on the filtration chamber side, and discharges dust to the outside of the housing by communicating with the dust-removing arm. Backwash water discharge pipe and the lower end of the shaft of the dust removal arm A plurality of rakes and a plurality of rakes extending radially from the tip of the rotation shaft in the horizontal direction and extending to the vicinity of the inner wall of the housing; and a predetermined interval in the horizontal direction between the rakes. And a dust rake means comprising a plurality of rakes, the tip of which slidably rotates in the direction of the drain nozzle by slidingly rotating the bottom of the housing toward the drain nozzle. -Na. With the above configuration, the dust caught by the filter screen member is scraped by the hollow dust removing arm, and the dust removed by the dust removing arm is connected to the reverse dust removing arm provided in communication with the hollow dust removing arm. Since the water is discharged from the washing discharge pipe to the outside of the housing, the scraped dust does not accumulate on the bottom of the housing, and the filter screen is removed.
The operation member can be prevented from being blocked for a long period of time, so that the operation can be continued for a long period of time. In addition, dust such as shellfish having a relatively large specific gravity deposited on the bottom of the housing is scraped by the dust scraper in the direction of the drain nozzle, and is automatically discharged out of the housing from the drain nozzle. There is no build-up, so there is no need to shut down the device and open the housing to remove it manually.

According to a fourth aspect of the present invention, there is provided the automatic strainer according to any one of the first to third aspects, wherein a control valve controlled to open and close by a timer is provided in the pipe of the drain nozzle. Further, the invention according to claim 5 is characterized in that the rake is 25 to 5 with respect to the rotation direction of the rake arm.
5. A structure in which the plurality of rakes are slid and rotated on the entire bottom surface of the housing to scrape dust toward the drain nozzle.
An automatic strainer according to any one of the above items. With the configuration in which the control valve is provided, dust accumulated on the bottom of the housing is scraped in the direction of the drain nozzle by the dust scraping means and automatically discharged from the drain nozzle to the outside of the housing. Since it is possible to synchronize with the operation of the means, it is possible to discharge dust efficiently. In addition, the rake is set at 2 with respect to the rotation direction of the rake.
With the configuration inclined at an angle of 5 to 50 °, dust accumulated on the bottom of the housing can be effectively scraped in the direction of the drain nozzle. If the angle is less than 25 ° or greater than 50 °, the scraping effect becomes insufficient.

[0013]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of an automatic strainer according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG.

Reference numeral 1 denotes a cylindrical housing provided with an inlet 2 for raw water connected to the upstream side of the intake pipe and an outlet 3 for treated water connected to the downstream side on the opposite side. An inclined partition wall 6 having an opening 6a at the center, which defines an inlet side as a filtration chamber 4 and an outlet side of treated water as a treated water chamber 5, and a drain nozzle 7 at the bottom center of the filtration chamber and a rotating top. Driving means 8 is provided. Further, a control valve 13 that is controlled to open and close by a timer is provided in the pipe 7a of the drain nozzle 7.

Reference numeral 9 denotes a cylindrical pedestal 9a at the opening of the partition wall 6.
Numeral 10 denotes a cylindrical filter screen member vertically disposed through a shaft. Reference numeral 10 denotes a filter screen member which is axially mounted on a drive shaft 8a of the rotary drive means 8 and protrudes in the horizontal direction. 9 is a hollow dust removing arm that slides and rotates on the surface on the filtration chamber 4 side;
A backwash water discharge pipe 10a for discharging dust to the outside of the housing in communication with the dust removing arm 10 is connected.

As the filtering screen member 4, a member formed mainly of a wire mesh, a punching plate or a grid is mainly used, and its shape is preferably cylindrical or arcuate.
Further, it is preferable that a plurality of groove-shaped pockets extending in the vertical direction have a corrugated cross-section formed at a predetermined pitch, but the present invention is not limited thereto. In addition, an appropriate size of the openings is selected according to the use conditions.

Reference numeral 11 denotes a rotating shaft 11a extending from the lower end of the shaft center of the dust removing arm 10, and a radially protruding projecting portion extending from the tip of the rotating shaft 11a to the vicinity of the inner wall of the housing 1. A plurality of rakes 12 and rakes
A plurality of plate-like rakes 12a projecting downward at predetermined intervals in the horizontal direction of the drum 12 and having a leading end slidably rotating on the bottom of the housing 1 to scrape dust toward the drain nozzle 7. It is a scraping means. The rake 12
a is 25 to 50 with respect to the rotation direction of the rake 12.
The rakes 12a are arranged to be inclined at an angle of .degree., And the entirety of the plurality of rakes 12a is slidably rotated on the entire bottom surface of the housing to scrape dust toward the drain nozzle. If the angle is less than 25 ° or greater than 50 °, the scraping effect may be insufficient. The tip of the rake 12a is made of a material such as metal, synthetic resin or synthetic rubber, which is appropriately determined according to the material of the housing 1.

Next, a filtering operation for removing contaminants from a water stream by the automatic strainer having the above-described configuration will be described below. Raw water containing dust that has flowed into the filtration chamber 4 in the housing 1 from the intake pipe (not shown) through the inflow port 2 passes through the partition wall 6.
While flowing into the filtration chamber 4 inside the filtration screen member 9 through the inside of the cylindrical pedestal 9a provided at the opening of the filter screen 9 and while flowing from the filtration chamber 4 to the treated water chamber 5, the filtration screen N-member 9
The dust is removed by filtration, and clear treated water is obtained on the treated water chamber 5 side, and is supplied from the outlet 3 to predetermined devices and devices.

The dust trapped by the filter screen member 9 is a portion where the suction port of the hollow dust-removal arm 10 which is rotated and controlled by a timer or a differential pressure signal is located, and is disposed in the treated water chamber 5. The filtered screen member 9 is backwashed by treated water flowing back into the dust-removing arm 10 from the side, and the dust is backwashed water discharge pipe 10a provided in communication with the dust-removal arm 10 together with the backwash water. From the housing 1.

Further, dust such as shellfish having a relatively large specific gravity is captured by the filtration screen and drops and accumulates on the bottom of the filtration chamber 4 at the same time. And a plurality of plate-like lathes projecting from the rame 12 of the dust collecting means 11 rotating continuously or intermittently.
By the key 12a, it is raked in the direction of the drain nozzle 7,
It is discharged out of the system from a pipe 7a of the drain nozzle 7. In automatically discharging the dust from the drain nozzle 7 to the outside of the housing 1, the control valve 13, which is opened and closed by a timer, can be synchronized with the operation of the dust scraper 11, so that the dust can be efficiently discharged. The rake 12a is provided at an angle of 25 to 50 with respect to the rotation direction of the rake 12, and the plurality of rakes 12a slide and rotate on the entire bottom surface of the housing. As a result, dust is swept in the direction of the drain nozzle, so that there is no danger of leaving dust and the dust can be efficiently discharged.

[0021]

The present invention has the following effects. The dust that has settled and deposited on the bottom of the filter chamber of the housing is raked in the direction of the drain nozzle by the dust scraping means, and is automatically discharged from the drain nozzle to the outside of the housing. Therefore, there is no need to stop the operation of the apparatus, open the housing, and manually remove the housing.

Further, in the invention according to claim 2,
The dust caught by the filter screen member is scraped off by a dust removing arm, and the dust accumulated at the bottom of the filter chamber is discharged from the drain nozzle, so that the filter screen member can be prevented from being blocked for a long time. Therefore, it has the effect that the operation can be continued for a long time. Claim 3
In the invention described in (1), the dust caught by the filtration screen member is scraped by a hollow dust removing arm, and the dust removed by the dust removing arm is provided in communication with the hollow dust removing arm. Since the water is discharged from the backwash water discharge pipe to the outside of the housing, the scraped dust does not accumulate on the bottom of the housing, so that the filter screen member can be prevented from being blocked for a long time. I have

Further, according to the invention of claim 4, since the discharge of dust can be synchronized with the operation of the dust scraping means, efficient discharge of dust can be achieved. Also, the dust accumulated on the bottom of the housing can be effectively swept toward the drain nozzle without remaining.

[Brief description of the drawings]

FIG. 1 is a sectional view of an automatic strainer according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

[Explanation of symbols]

 1: Housing 2: Inflow of raw water 3: Outflow of treated water 4: Filtration chamber 5: Treated water chamber 6: Partition wall 6a: Opening 7: Drain nozzle 7a: Piping 8: Rotary drive means 8a: Drive shaft 9: Filtration Screen member 9a: Pedestal 10: Dust removal arm 10a: Backwash water discharge pipe 11: Dust scraping means 11a: Rotary shaft 12: Rake arm 12a: Rake 13: Control valve

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) B01D 29/04 510D 520B 530A 29/38 510A 29/42 520 35/02 A

Claims (5)

[Claims] A strainer provided in a raw water intake pipe for removing dust has an inlet for raw water connected to the upstream side of the intake pipe and an outlet for treated water connected to the downstream side. A housing, a filtration screen member that defines the inlet of raw water in the housing as a filtration chamber and an outlet of treated water as a treatment water chamber, a drain nozzle provided at the bottom of the filtration chamber, and a bottom in the filtration chamber. An automatic strainer provided with dust scraping means for scraping dust accumulated on the drain nozzle side. 2. A strainer provided in a raw water intake line for removing dust, comprising a raw water inlet connected to an upstream side of the raw water intake line and a treated water outlet connected to a downstream side of the raw water intake line. A housing, a cylindrical filtration screen member that defines the inlet of raw water in the housing as a filtration chamber, and an outlet of treated water as a treatment water chamber, and a drain nozzle provided at the center of the bottom of the filtration chamber; A rotation driving means provided on the top of the housing, one end of which is mounted on a drive shaft of the rotation driving means and is protruded in a horizontal direction, and a tip end thereof slides and rotates on the surface of the filtration screen member on the filtration chamber side. A dust removing arm, a rotating shaft extending from the lower end of the shaft center of the dust removing arm, and a plurality of radially extending projections extending from the tip of the rotating shaft in the horizontal direction and extending to near the inner wall of the housing. At regular intervals in the horizontal direction. An automatic strainer provided with a plurality of rakes, each of which is provided with a plurality of rakes protruding in the direction of the housing and having a leading end slidably rotating around the bottom of the housing to scrape dust toward the drain nozzle. . 3. A strainer provided in a raw water intake pipe for removing dust, wherein an inlet of raw water connected to an upstream side of the intake pipe and an outlet of treated water connected to a downstream side of the strainer are opposed to each other. A housing provided on the side surface, a filtration chamber on the inlet side of raw water in the housing, and an inclined partition wall provided with an opening in a central portion that defines the outlet side of the treated water as a treated water chamber,
A drain nozzle provided at the center of the bottom of the filtration chamber, a cylindrical filtration screen member vertically disposed through a cylindrical pedestal at the opening of the partition wall, and a rotation driving means provided at the top of the housing. A hollow dust-removing arm, which is mounted on a drive shaft of a rotary drive means and protrudes in the horizontal direction, and whose tip end slides and rotates on the surface of the filtration screen member on the filtration chamber side, and a dust-removal arm. Backwash water discharge pipe that discharges dust to the outside of the housing by communicating with the rotating shaft, a rotating shaft extending from the lower end of the shaft center of the dust removing arm, and a radially projecting radially extending from the tip of the rotating shaft. A plurality of rake arms extending to near the inner side wall of the housing and a plurality of rake arms projecting downward at a predetermined interval in a horizontal direction,
A dust collecting means comprising a plurality of rakes, the tip of which slides and rotates on the bottom of the housing to scrape dust toward the drain nozzle;
Na. 4. The automatic strainer according to claim 1, wherein a control valve controlled to be opened and closed by a timer is provided in a pipe of the drain nozzle. 5. The rake is provided to be inclined at an angle of 25 to 50 ° with respect to the rotation direction of the rake, and the plurality of rakes are slidably rotated on the entire bottom surface of the housing. The automatic storage device according to any one of claims 2 to 4, wherein the automatic storage device is provided with a structure in which dust is swept toward the drain nozzle.
Na.