JPH1057724A - Cleaning device for strainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make easy the cleaning of a strainer. SOLUTION: Inside a body 1 having the outward form similar to a Y-flanged joint, a screen housing part 3 in which a screen 14 for collecting foreign matter in fluid in formed in a pipe part 1a having an inclination of about 45 deg. to the fluid flow direction, is formed. To a flange 1b formed in an opening at the tip of the pipe part 1, a cover 10 is fixed by bolts 4 and nuts 5 through a packing 6 so as to close the tip opening. Furthermore, to the almost central part of the cover 10, a general manually operated ball valve 13 is connected through a socket 11 and a nipple 12. That is, the ball valve 13 is opened to communicate the inner spherical surface of the screen 14 and the outside with each other while facing the inner peripheral surface of the screen 14, and to the screen 14, a truncated conic shaped hopper 14a is attached to make easy the discharge of collected foreign matter or the like accumulated in the screen 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for cleaning a strainer, and more particularly to a technology for facilitating discharge of trapped foreign matters and cleaning of a screen as a collecting member.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a conventional strainer which is interposed in a pipe and collects foreign matters in a fluid flowing through the pipe.
In the inside of the main body 1 having an external shape similar to a so-called 45 ° Y-flange type joint, a screen 2 described later is housed in a pipe 1a having an inclination of approximately 45 ° with respect to the direction of fluid flow. Screen storage part 3 is formed. The screen 2 accommodated in the screen accommodating portion 3 has, for example, a large number of small holes 2a formed in a stainless steel cylindrical member having excellent rust prevention ability, and has an action of collecting foreign substances in a fluid. A lid 7 is fixed to a flange 1b formed at a distal end opening of the tube portion 1a of the main body 1 by a bolt 4 and a nut 5 as fastening members with a packing 6 interposed to close the distal end opening. Further, a drain plug 8 is attached to the lid 7 in order to discharge residual water and the like accumulated in the screen storage unit 3.

When cleaning a strainer having such a configuration, it is necessary to perform the following procedure after closing a valve interposed in a piping system. (1) Remove the drain plug 8 and remove the residual water accumulated in the screen storage unit 3. (2) Remove the nut 5 fixing the lid 7.

(3) Remove the lid 7. (4) Pull out the screen 2 and remove the foreign matter collected here. (5) The attached matter on the inner peripheral surface of the screen 2 is removed with a wire brush or the like.

[0005]

However, in the conventional method of cleaning the strainer, the nut 5 fixing the lid 7 is sometimes fixed by rust or paint and is difficult to remove. When the old packing 6 is fixed to the joining surface of the flange 1b, it is necessary to replace the packing 6 with a scraper or the like, or to join the flange 1b with a wire brush or a sandpaper. That the surface had to be smoothed and this work took a considerable amount of time, that the surface of the lid 7 and the nut 5 were considerably scratched and that the paint had to be repaired after cleaning, etc. For this reason, the cleaning work of the strainer was extensive.

Accordingly, the present invention has been made in view of the above-described conventional problems, and therefore, it is possible to discharge collected foreign substances and clean a screen as a collecting member without removing a cover or the like when cleaning the strainer. It is an object of the present invention to provide a strainer cleaning device that can easily perform the cleaning.

[0007]

According to the present invention, a screen for trapping foreign matter in a fluid is accommodated in a screen accommodating portion provided in the middle of a pipe through which the fluid flows. In the strainer, an opening for communicating between the inside and the outside of the screen storage unit while facing the collecting surface of the screen is opened on a lid that is detachably fixed to the screen storage unit to store and remove the screen. And an on-off valve for opening and closing the opening.

In the invention according to claim 2, a hopper for guiding the collected foreign matter to the opening is provided on the collecting surface of the screen. The invention according to claim 3 is configured such that the on-off valve is a ball valve.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the attached drawings. FIG. 1 shows an embodiment of a strainer cleaning apparatus according to the present invention. In the following description, the same components as those of the conventional strainer shown in FIG. 2 will be denoted by the same reference numerals, and redundant description will be omitted.

An opening 10a into which a cylindrical socket 11 is fitted is opened substantially at the center of the lid 10 for closing the opening of the flange 1b of the main body 1, and the socket 11 is fitted into the opening 10a. After that, the lid 10 and the socket 11 are firmly fixed by welding or the like. A female thread is formed on the inner peripheral surface of the socket 11, and one end of a nipple 12 as a pipe joint member having male threads at both ends is fitted therein. The other end of the nipple 12 is fitted with one end of a general manual bronze ball valve 13 (open / close valve). That is, the ball valve 1
By opening the screen 3, the inner peripheral surface of the screen 14 is communicated with the outside while facing the inner peripheral surface (collecting surface) of the screen 14 stored in the screen storage unit 3.

When selecting the dimensions of the ball valve 13, a cleaning tool such as a wire brush can be easily inserted from the opening when the ball valve 13 is fully opened, and the cleaning operation using the cleaning tool is easy, so that the collected foreign matter can be easily removed. It is preferable to select one that facilitates discharge. For example, the nominal diameter of the pipe is 65A to 25A.
When the nominal diameter of the ball valve is 0A, the nominal diameter of the ball valve is 50A, and when the nominal diameter of the piping is 300A or more, the nominal diameter of the ball valve is about 125A.

The screen 14 is provided with a frusto-conical hopper 14 a, and the residual water and foreign substances accumulated in the screen 14 are formed in the opening 10 formed in the lid 10.
a. Next, the operation of the strainer cleaning device having such a configuration will be described. Fluid flowing through the piping system (for example, liquid such as water or gas such as air)
Is from the inner peripheral surface (upstream side) to the outer peripheral surface (downstream side) of the screen 14 through a small hole 14 a formed in the screen 14.
It is distributed to. At this time, the foreign matter contained in the fluid is collected by the small holes 14a, and the fluid flowing out of the strainer does not contain the foreign matter.

However, if foreign matter in the fluid is collected for a long period of time, the small holes 14 formed in the screen 14
a is clogged, and the flow resistance increases due to trapped foreign substances. Therefore, it is necessary to periodically clean the screen 14. Cleaning of this screen 14
For example, by performing it every six months, the performance of the strainer can be maintained at or above the standard.

The cleaning of the screen 14 may be performed in the following procedure after closing the valve interposed in the piping system. (1) The ball valve 13 is fully opened to remove residual water accumulated in the screen storage unit 3 and simultaneously discharge trapped foreign matter. (2) A long cleaning tool such as a wire brush is inserted into the screen 14 from the opening of the ball valve 13, and the attached matter on the inner peripheral surface of the screen 14 is removed by the wire brush or the like. Thereafter, the screen 14 is cleaned by opening the valve in the pipe again and flowing a fluid such as water through the pipe.

(3) The ball valve 13 is fully closed. That is, according to the strainer cleaning device of the present embodiment, without removing the strainer lid as in the related art,
The screen can be easily cleaned, the labor required for cleaning the screen and the like can be greatly reduced, and the maintenance cost can be reduced.

Further, the effect in the present embodiment is provided by the ball valve attached to the lid and the screen provided with the hopper, so that the lid and the screen of the currently installed strainer need only be replaced. The existing strainer can also enjoy the same effect as the present invention, and it can be said that the strainer is extremely useful. In the present embodiment, a substantially cylindrical screen 45 is stored.
° A strainer cleaning device was added to a strainer having an external shape similar to a Y-flange type pipe joint. And a strainer having any external shape.

[0017]

As described above, according to the first aspect of the present invention, when cleaning the strainer, the on-off valve is opened to allow the inside and the outside of the screen storage unit to communicate with each other. The collected foreign matter may be discharged from the communicating portion, and then a cleaning tool such as a wire brush may be inserted to remove the attached matter attached to the collecting surface of the screen. That is, since it is not necessary to remove the lid, the screen can be easily and quickly cleaned, and the maintenance cost can be reduced.

According to the second aspect of the present invention, the hopper for guiding the collected foreign matter to the opening formed in the lid is provided on the collecting surface of the screen. The deposits removed from the collecting surface are easily discharged to the outside of the pipe, and the cleaning time can be further reduced. According to the third aspect of the present invention, since the on-off valve is a ball valve, it is possible to use an inexpensive standard product which is generally distributed, and to reduce the labor and cost of manufacturing the strainer cleaning device. Can be achieved. further,
Due to the structure of the ball valve, when the ball valve is fully opened, its opening is greatly opened, so that foreign substances can be smoothly discharged and a cleaning tool such as a wire brush can be easily inserted.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a strainer cleaning device according to the present invention.

FIG. 2 shows an example of a conventional strainer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Screen 2a Hopper 10 Lid 13 Ball valve

Claims (3)

[Claims] 1. A strainer comprising a screen for trapping foreign matter in a fluid stored in a screen storage portion provided in the middle of a pipe through which a fluid flows, wherein a screen storage portion for storing and removing the screen is provided. An opening for communicating between the inside and the outside of the screen storage unit while facing the collecting surface of the screen is opened on the lid that is freely detachable and fixed, and an on-off valve for opening and closing the opening is attached. Strainer cleaning device. 2. A strainer cleaning apparatus according to claim 1, wherein a hopper for guiding the collected foreign matter to said opening is provided on a collecting surface of said screen. 3. The strainer cleaning device according to claim 1, wherein the on-off valve is a ball valve.