JP2013022480A - Strainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a strainer by which foreign matter adhering to a screen is surely removed.SOLUTION: An inlet 1 and an outlet 2 are formed in a body 3, and a ball valve 5 is arranged therein to be rotatable by an external actuator (not shown). A cylindrical filter part 4 is housed inside the ball valve 5. An outlet communicating path 6 and an inlet communicating path 7 are respectively formed at positions substantially perpendicular to the filter part 4 of the ball valve 5. A blow path 8 is formed at a lower end of the body 3. The ball valve 5 is rotated clockwise by the external actuator (not shown), so that the inlet communicating path 7 may communicate with the inlet 1, and the lower end inner peripheral part of the filter part 4 may communicate with the blow path 8, by which the foreign matter deposited on the inner peripheral surface of the filter part 4 is backwashed.

Description

The present invention relates to a strainer that is attached to various fluid pipes such as water, compressed air, and steam, and traps foreign matters such as rust and solid particles mixed in the fluid by a filter portion provided inside, particularly in the filter portion. The present invention relates to a strainer that can remove foreign matter that has been captured and adhered to the inner peripheral surface of a filter unit.

 An example of a conventional strainer is shown in Patent Document 1. This is because the valve member is attached to each of the outflow passage and the blow passage, and the foreign matter accumulated on the inner peripheral surface of the screen is blown out by the fluid flow from the inlet by opening the valve member of the blow passage. Is something that can be done.

JP-A-7-303807

The conventional strainer has a problem that foreign matter on the inner peripheral surface of the screen cannot be reliably removed.

Therefore, the problem to be solved by the present invention is to obtain a strainer that can reliably remove the foreign matter adhered to the screen.

In order to solve the above-described problems, the strainer of the present invention partitions a gap between an inlet and an outlet with a filter part having a large number of small-diameter through holes, and communicates one side of the filter part with the inlet. The other side communicates with the outlet, and the filter part can capture the foreign matter contained in the fluid flowing down from the inlet to the outlet, and the filter part can be rotated when the fluid from which foreign matter has been removed flows down to the outlet. By disposing the ball valve body inside and rotating the ball valve body with an external actuator, the one surface side and the other surface side of the filter portion can communicate with the inlet alternately.

According to the present invention, by rotating the ball valve body, the filter unit can be backwashed by alternately communicating the one side and the other side of the filter unit with the inlet. The foreign matter adhering to the surface can be reliably removed, and clogging of the filter portion can be prevented.

It is sectional drawing of the strainer which concerns on embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIG. A strainer is constituted by the main body 3 provided with the inlet 1 and the outlet 2, the cylindrical filter portion 4 that partitions the inlet 1 and the outlet 2, and the ball valve body 5 that accommodates the filter portion 4. In the ball valve body 5, an outlet communication path 6 and an inlet communication path 7 are formed substantially perpendicularly to the filter portion 4.

  Although not shown, the cylindrical filter portion 4 is provided with a large number of small-diameter through-holes over the entire circumference and the entire length, and flows from the inlet 1 to the outlet 2 through the cylindrical inner space of the filter portion 4 and the outlet communication passage 6. To get rid of foreign matter mixed in the fluid. Accordingly, the foreign matter removed by the filter unit 4 adheres to the inner peripheral surface of the filter unit 4 and accumulates.

  A blow passage 8 is formed at the lower end of the main body 3. The ball valve body 5 is rotated clockwise by an external actuator (not shown) from the state shown in FIG. 1 so that the inlet communication path 7 communicates with the inlet 1 and the lower end inner periphery of the filter section 4 communicates with the blow path 8. Thus, the foreign matter accumulated on the inner peripheral surface of the filter unit 4 can be backwashed.

  When the backwashing is completed, the ball valve body 5 is rotated counterclockwise by an external actuator, the outlet communication path 6 communicates with the outlet 2, and the upper inner periphery of the filter section 4 communicates with the inlet 1. In this state, foreign matter is captured on the inner peripheral surface of the filter unit 4 again.

The present invention can be used as a strainer in which not only one filter unit but also a plurality of filter units are attached.

DESCRIPTION OF SYMBOLS 1 Inlet 2 Outlet 3 Main body 4 Filter part 5 Ball valve body 6 Outlet communication path 7 Inlet communication path 8 Blow path

Claims (1)

The inlet and outlet are partitioned by a filter part having a large number of small-diameter through holes, one side defined by the filter part communicates with the inlet, the other side communicates with the outlet, and the outlet from the inlet at the filter part. The foreign matter contained in the fluid flowing down to the fluid is captured and the fluid from which the foreign matter has been removed flows down to the outlet. The strainer is characterized in that one surface side and the other surface side of the filter portion can be alternately communicated with the inlet by rotating the shaft with an external actuator.

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