JPH024409A - Filter device - Google Patents

Abstract

PURPOSE:To reduce the frequency of the replacement or through cleaning of a filter main body and to enhance workability by providing a valve body which closes an inflow part through an energizing means and releasing the closure of said inflow port by the inflow pressure of a fluid, in a casing. CONSTITUTION:Since a valve body 4 always energized in the direction of an inflow port 21 through a coil spring 5 to close the inflow port 21 and moved in the direction of an emitting port 22 by the inflow pressure of a fluid to release the closure of the inflow port 21 is provided in a casing 2, the inflow port 21 is constricted by the valve body 4 and the flow velocity of the fluid passing through a gap 41 is fastened. As a result, the impurities once adhered to the inner wall surface of a reticulated body 31 are scraped off by the flow of the fluid. Therefore, the clogging of the reticulated body 31 can be prevented until impurities are fully accumulated in the filter main body 3. Therefore, the frequency of the replacement or thorough cleaning of the filter main body 3 is reduced and workability can be enhanced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is designed to be incorporated in the middle of a flow path such as a hose or piping for transporting fluid containing impurities to another location, and to form a part of the flow path. The present invention relates to a filter unit that removes impurities from fluid.

[Conventional technology]

Generally, when watering or applying fertilizer to crops,
Water from rivers and irrigation canals is pumped into water storage tanks using submersible pumps, and the water from these tanks is used.

However, the water from rivers and irrigation canals is contaminated with impurities such as garbage. Therefore, if the water from the water storage tank is used as is, the nozzle of the sprayer will be clogged with impurities and the pump will be damaged, so it is necessary to remove the impurities when pumping water into the water storage tank.

As a method for removing these impurities, there is a filter unit B as shown in FIG.

This filter unit B includes a casing 2 and a filter main body 3. The casing 2 has a cylindrical shape, and has a fluid inlet 21 formed on one side and an outlet 2 on the other side.
2 is formed. The filter main body 3 is a cylindrical body with an individual bottom, the side circumferential surface of which is formed of a fine mesh member 31, and is housed within the casing 2.

The fluid that has flowed into the casing 2 from the inlet 21 flows into the filter body 3 from the opening 32 of the filter body 3 as shown by the arrow, passes through the mesh body 31, and then flows between the filter body 3 and the inner wall surface of the casing 2. The liquid is discharged from the discharge port 22 through a gap formed between the two. Therefore, the fluid passing through this filter unit is
1, impurities are filtered out and clean fluid can be discharged from the discharge port 22. In the figure, reference numeral 24 denotes a spring that biases the filter body 3 toward the inlet port 21 (a problem to be solved by the invention). Since the filters tend to adhere to each other, they quickly become clogged, requiring frequent disassembly and cleaning and replacement of the filter body, resulting in very poor workability.

In view of these circumstances, the present invention aims to provide a filter unit that requires less frequent replacement of the filter body, disassembly and cleaning, etc.

[Means to solve the problem]

In order to achieve such an object, the present invention includes a cylindrical casing that is incorporated in the middle of the flow path and forms a part of the flow path, and a cylindrical casing that is housed within the casing and has an opening on one side. and a bottomed cylindrical filter body whose side wall surface is formed of a mesh body, and the fluid that flows into the casing from the inflow port of the casing flows into the filter body from the opening, and the filter body has a bottomed cylindrical filter body whose side wall surface is formed of a mesh body. The filter unit is configured to be discharged from the discharge port through the casing, and the inside of the casing is always urged in the direction of the inflow port through a biasing means to close the inflow port and to prevent fluid from flowing through the casing. The gist of the filter unit is a filter unit characterized by being provided with a valve body which moves in the direction of the discharge port to release the closure due to the inflow pressure of the casing. It is preferable that the casing main body and the mounting structure have a mounting structure, and that the casing body and the mounting structure are joined by a joining means that can be disassembled and assembled while maintaining the positional relationship at a constant position.

[For production]

With the above configuration, in the filter unit according to the present invention, the inlet is narrowed by the valve body, and the flow rate of the fluid passing through the gap is increased. Therefore, impurities adhering to the inner wall surface of the net-like body are scraped off by the flow. This prevents the mesh from clogging until the inside of the filter body is filled with impurities.

Moreover, the above-mentioned joining means allows the filter body to be replaced without putting a load on the piping.

〔Example〕

Hereinafter, embodiments of the present invention will be explained in detail with reference to the accompanying drawings.

FIG. 1 shows a side cross-section of one embodiment of a filter unit according to the present invention.

As shown in the figure, this filter unit A includes a casing 2 and a filter body 3 similar to the conventional one.

The filter body 3 includes a valve body 4 and a coil spring 5 as a biasing means.

The valve body 4 is a spherical body, and a portion of the valve body 4 fits into the inflow port 21 to stop the flow of fluid.

The coil spring 5 always urges the valve body 4 in the direction of the inlet 21.

The casing 2 can be removed from the filter body 3 by removing the cap 23 as the disassembly and assembly means from the casing body 2a and removing the inlet body 24 as the mounting structure.
．． The contents such as the valve body 4 can be taken out of the casing 2. Further, a female thread is formed on the inlet port 21 side, and a male thread is formed on the discharge port 22 side, so that it can be screwed into the end of a pipe or a hose (not shown). Furthermore, since the cap 23 is loosely fitted to the inlet body 25, the inlet body
5 and the casing body 2a can be separated.

Since this filter unit I-A has the above-described configuration, the valve body 4 moves toward the discharge port 22 as shown in FIG. 2 in response to the pressure of the fluid sent into the casing 2. , a gap 41 is formed between the valve body 4 and the casing 2. Therefore, the fluid passes through this gap 41 and the valve body 4
flows along the circumference of the Since the flow path of the gap 41 is narrower than that of the original piping, the flow rate of the fluid increases, and the fluid flows as if washing the inner wall surface of the net-like body 31. Therefore, the impurities that have previously adhered to the inner wall surface of the net-like body 31 are scraped off by the flow, and the mesh-like body 31 is not clogged until the inside of the filter body 3 is filled with impurities.

The filter unit according to the present invention is not limited to the above embodiments.

In the above embodiment, the valve body is spherical, but it may also be a conical valve body 4' as shown in FIG. In the above embodiment, the cap was provided on the inlet side, but it may also be provided on the outlet side. In the above embodiment, the valve body was biased toward the inlet by a coil spring placed on the outlet side of the filter body, but a biasing means is provided to pull the valve body from the inlet side. I don't mind.

〔Effect of the invention〕

As described above, the filter unit according to the present invention has the following features:
A cylindrical casing that is incorporated in the middle of the flow path and forms part of the flow path, and a bottomed cylindrical casing that is housed within the casing and has an opening on one side and whose side wall surface is made of a mesh. and a filter body, such that fluid flowing into the casing from the inlet of the casing flows into the filter body from the opening, passes through the mesh portion, and is discharged from the discharge port. In the filter unit, a filter is provided in the casing that is always urged toward the inlet by a biasing means to close the inlet, and is moved toward the outlet by fluid inflow pressure to close the inlet. Since a releasing valve element is provided, the inlet is narrowed by the valve element, and the flow rate of the fluid passing through the gap is increased. Therefore, impurities adhering to the inner wall surface of the net-like body are scraped off by the flow. Therefore, clogging of the mesh body can be prevented until the inside of the filter body is filled with impurities. Therefore, the frequency of replacement and disassembly of the filter body is reduced, and workability can be improved.

In addition, the casing includes a casing body that serves as a housing portion for the filter body and a mounting structure portion having a structure for mounting the pipe, and the casing body and the mounting structure portion are separated while maintaining their positional relationship at a constant position. If the filter body is joined by an assemblable joining means, the filter main body can be replaced or removed without putting a load on the piping. Therefore, resin piping, etc. will not be damaged due to the load of removal work.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of an embodiment of the filter unit according to the present invention, FIG. 2 is a side sectional view of the valve body moved toward the discharge port side by fluid, and FIG. FIG. 4 is a perspective view of another embodiment of a valve body, and FIG. 4 is a side sectional view of an example of a conventional filter unit. A, B...Filter unit 2...Casing 3
... Filter body 4 ... Valve body 5 ... Coil spring (biasing means) 21 ... Inflow port 22 ... Discharge port 31 ... Reticular body 2a ... Casing main body
23... Cap (disassembly and assembly means) 25... Inlet body (mounting structure part)

Claims (2)

[Claims] (1) A cylindrical casing that is incorporated in the middle of the flow path and forms part of the flow path, and a cylindrical casing that is housed in the casing and has an opening on one side and whose side wall surface is made of a net-like material. and a bottom cylindrical filter body, such that fluid flowing into the casing from the inlet of the casing flows into the filter body from the opening, passes through the mesh portion, and is discharged from the discharge port. In the filter unit, a filter unit is provided in the casing which is always biased in the direction of the inflow port through a biasing means to close the inflow port, and which is freely moved in the direction of the discharge port due to the inflow pressure of the fluid. A filter unit comprising a valve body for releasing the closure. (2) The casing includes a casing body that serves as a accommodating part for the filter body and a mounting structure part that has a structure for mounting the pipe, and the casing body and the mounting structure part are maintained in a constant position. The filter unit according to claim 1, wherein the filter unit is joined by a joining means that can be disassembled and assembled.