JP2012192317A - Strainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strainer not requiring a separate valve attachment to an inlet side of the strainer, and allowing foreign objects fixed to a screen of the strainer to be surely removed.SOLUTION: A strainer body 3 has an inlet 1 and an outlet 2, and is equipped with a filter 4 inside. A valve seat 5 is formed at a midsection between the inlet 1 and the outlet 2, and a valve element 7 is arranged facing the valve seat 5. A handle 9 is connected to the valve element 7 through a connection rod 8. An extension rod 10 to which cleaning members 6 are attached, is connected with an under part of the valve element 7. The filter 4 can be cleaned by rotating the handle 9 to rotate the extension rod 10, thereby causing radial ends of the cleaning members 6 to rotatingly contact an inner circumferential surface of the filter 4. Fluid from the inlet 1 can be prevented from reaching the filter 4 by rotating the handle 9 to seat the valve element 7 on the valve seat 5 when needed.

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

In order to disassemble the strainer itself, the above-described conventional strainer must stop the flow of fluid inside the strainer. For this reason, it is necessary to install a separate valve on the inlet side of the strainer. There is a problem that foreign matter on the peripheral surface cannot be reliably removed.

Therefore, the problem to be solved by the present invention is to obtain a strainer that does not require a separate valve on the inlet side and can reliably remove 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, captures foreign matter contained in the fluid flowing down from the inlet to the outlet at the filter unit, and flows down the fluid from which foreign matter has been removed to the outlet. A valve seat is formed opposite to the valve seat, a handle for opening and closing the valve body from the outside is connected, and the valve body is opposite to the handle connection direction and the filter portion An extension rod is connected to the inner peripheral side, and a cleaning member is attached to the extension rod.

According to the present invention, the valve body is formed by forming the valve seat on the inlet side of the filter portion, so that a separate valve is not required, and the cleaning member is attached to the inner peripheral side of the filter portion. As a result, by opening and closing the handle, the foreign matter adhered to the inner peripheral surface of the filter portion by the cleaning member can be mechanically removed reliably, 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 main body 3 provided with an inlet 1 and an outlet 2, a cylindrical filter section 4 that partitions the inlet 1 and the outlet 2, and a cleaning disposed in a cylindrical space on one surface side that communicates with the inlet 1 side of the filter section 4. The member 6 constitutes a strainer.

  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 thereof and mixed into the fluid flowing down from the inlet 1 to the outlet 2 through the cylindrical inner space of the filter portion 4. It is intended to get rid of foreign objects. Accordingly, the foreign matter removed by the filter unit 4 adheres to the inner peripheral surface of the filter unit 4 and accumulates.

  A valve seat 5 is formed at the center of the inlet 1 and outlet 2 on the inlet side of the filter portion 4. A disc-like valve body 7 is disposed on the upper oblique side facing the valve seat 5, and is connected to the handle 9 via a connecting rod 8 to the valve body 7. An extension rod 10 is connected to the valve body 7 on the side opposite to the direction in which the handle 9 is connected and to the inner peripheral side of the filter portion 4. A number of brush-like cleaning members 6 are attached to the extension rod 10. The cleaning member 6 is made of a metal wire. The cleaning member 6 has a length that allows the tip of the cleaning member 6 to contact the inner peripheral surface of the filter unit 4. By rotating the handle 9, the tip of the cleaning member 6 can clean the inner peripheral surface of the filter unit 4.

  The state shown in FIG. 1 is a state in which the valve body 7 is separated from the valve seat 5, but the valve body 7 can be in a state of being seated on the valve seat 5 by rotating the handle 9. Then, the fluid does not flow down from the inlet 1 to the filter unit 4, and when removing the filter unit 4 from the main body 3, it is not necessary to provide a separate valve on the inlet side of the strainer.

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 Valve seat 6 Cleaning member 7 Valve body 8 Connecting rod 9 Handle 10 Extension rod

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. In order to capture the foreign matter contained in the fluid flowing down to the flow and flow down the fluid from which foreign matter has been removed to the outlet, a valve seat is formed on the inlet side of the filter part, and the valve seat is opposed to the valve seat. A valve body is arranged, a handle for opening and closing the valve body from the outside is connected, an extension bar is connected to the inner side of the filter part on the side opposite to the handle connection direction of the valve body, A strainer having a cleaning member attached thereto.

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