JPH0593508U - filter - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a filter capable of ensuring a sufficient flow rate of a fluid flowing between a mesh body and an opening end of a fluid passage and preventing a rib portion from being deformed by fluid pressure. . [Structure] Due to the step surface 30 of the rib portion 26, the rib portion 26
A gap 29 is formed between the mounting seat surface 22 and the mounting seat surface 22, and the protrusion 31 of the step surface 30 abuts the mounting seat surface 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a filter attached to an inlet of a fluid device such as a solenoid valve.

[0002]

[Prior Art]

 Conventionally, as shown in FIG. 4, an annular frame portion 5 having an abutment surface 4 that abuts against a mounting seat surface 3 recessed in the fluid passage opening end 2 of the fluid device 1, and is erected on the frame portion 5. A filter 9 including a rib portion 6 and a mesh body 8 stretched over a plurality of fluid passage openings 7 defined by the rib portion 6 and the frame portion 5 is known.

[0003]

[Problems to be solved by the device]

 In such a conventional filter 9, since the rib portion 6 comes into contact with the mounting seat surface 3 as a uniform surface with the contact surface 4 of the frame portion 5, it flows between the mesh body 8 and the fluid passage opening end 2. There is a problem that the flow rate of the fluid is low.

In order to solve such a problem, as shown in FIG. 5, a contact surface of the frame portion 5 is attached to the rib portion 6 so that a gap 10 is formed between the mounting seat surface 3 and the rib portion 6 of the filter 9. It is conceivable to form the step difference surface 11 with respect to No. 4.

The rib portion 6 is provided to reinforce the mesh body 8 so as not to be deformed when a fluid pressure is applied to the mesh body 8. Since the rib portion 6 is arranged so as to block a part of the fluid passage opening end 2, it is necessary to provide the gap 10 to float the rib portion 6 from the fluid passage opening end 2.

When the step portion 11 is formed on the rib portion 6 to form the gap 10 in this way, the rib portion 6 itself also depends on the fluid pressure when mounted on a fluid device that controls a fluid of relatively high pressure. In the type in which the fluid flows into the fluid device 1 from the fluid passage opening end 2 due to the possibility of deformation, the deformed rib portion 6 may block a part of the fluid passage opening end 2. There is a problem.

The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to make the flow rate of the fluid flowing between the mesh body and the fluid passage opening end sufficient. The purpose is to provide a filter in which the rib portion is not deformed by fluid pressure.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an annular frame portion having an abutment surface that abuts a mounting seat surface that is recessed at a fluid passage opening end of a fluid device, and a rib provided on the frame portion. And a mesh body stretched over a plurality of fluid passage openings defined by the rib portion and the frame portion, a gap is provided between the rib portion and the mounting seat surface. In order to form, the rib portion is provided with a step surface with respect to the contact surface of the frame portion, and the step surface is provided with a plurality of protrusions capable of abutting against the mounting seat surface. This is a feature.

[0009]

[Action]

 The stepped surface of the rib portion forms a gap between the rib portion and the mounting seat surface, so that the flow rate of the fluid flowing between the mesh and the fluid passage opening end becomes sufficient.

Further, since the projection on the stepped surface of the rib portion contacts the mounting seat surface, deformation of the rib portion due to fluid pressure is prevented.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a partially cutaway side view of a solenoid valve equipped with a filter according to an embodiment of the present invention, in which reference numeral 20 denotes a solenoid valve as a fluid device, which has a fluid passage opening. A mounting seat surface 22 is recessed at the end 21. The mounting seat surface 22 is defined by the bottom surface of the bottom recess of the housing 20a of the solenoid valve 20 and the end surface of the valve seat 20b. The filter 23 of the present invention is attached to the mounting seat surface 22.

As shown in FIGS. 2 and 3, the filter 23 includes an annular frame portion 25 having an abutment surface 24 that abuts against the mounting seat surface 22, and a rib portion 26 provided on the frame portion 25. And a mesh body 28 stretched over a plurality of fluid passage openings 27 defined by the rib portion 26 and the frame portion 25. The rib portion 26 extends between the disc portion 26a, which is concentric with the frame portion 25 and faces the fluid passage opening end 21, and between the disc portion 26a and the inner peripheral surface of the frame portion 25, and in the circumferential direction. And connecting portions 26b radially arranged at equal intervals.

In order to form a gap 29 between the rib portion 26 and the mounting seat surface 22, the rib portion 26 is provided with a step surface 30 with respect to the contact surface 24 of the frame portion 25. On the step surface 30 of each connecting portion 26b of each rib portion 26, a flat circular protrusion 31 that can abut the mounting seat surface 22 is integrally provided.

The step surface 30 and the projection 31 are provided on both side surfaces of each rib portion 26. As a result, when the filter 23 is mounted on the mounting seat surface 22 of the solenoid valve 20, the filter 23 can be mounted without erroneous assembly regardless of the front or back surface of the filter 23. Further, the net body 28 is integrally joined to the frame portion 25 and the rib portion 26 by insert molding.

Therefore, when the filter 23 is mounted on the mounting seat surface 22 of the solenoid valve 20, the step surface 30 of the rib portion 26 causes the space between the rib portion 26 and the mounting seat surface 22 as shown in FIG. Since the gap 29 is formed, the flow rate of the fluid flowing between the mesh body 28 and the fluid passage opening end 21 becomes sufficient.

Further, since the projection 31 of the step surface 30 of the rib portion 26 abuts on the mounting seat surface 22, deformation of the rib portion 26 due to fluid pressure is prevented.

The filter of the present invention is not limited to the solenoid valve described above, but can be widely applied to other fluid devices, and other configurations are also within the scope of the present invention. Can be changed in various ways.

[0019]

[Effect of the device]

 As described above, according to the filter of the present invention, the stepped surface of the rib portion forms a gap between the rib portion and the mounting seat surface, so that the flow rate of the fluid flowing between the mesh body and the fluid passage opening end is increased. Will be sufficient.

Further, since the projection on the stepped surface of the rib portion abuts on the mounting seat surface, deformation of the rib portion due to fluid pressure can be prevented.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a solenoid valve as a fluid device equipped with a filter according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a plan view of the filter of FIG.

FIG. 4 is a cross-sectional view of a conventional filter.

FIG. 5 is a diagram for explaining a problem of a conventional filter.

[Explanation of symbols]

 20 Solenoid valve (fluid device) 21 Fluid passage opening end 22 Mounting seat surface 23 Filter 24 Contact surface 25 Frame portion 26 Rib portion 27 Fluid passage opening 28 Net body 29 Gap 30 Step surface 31 Protrusion

Claims (1)

[Scope of utility model registration request] 1. A ring-shaped frame portion having an abutting surface that abuts a mounting seat surface that is recessed at an opening end of a fluid passage of a fluid device, a rib portion provided on the frame portion, and the rib portion. A plurality of fluid passage openings defined by the frame portion and the frame portion, and in order to form a gap between the rib portion and the mounting seat surface, The filter is characterized in that the rib portion is provided with a stepped surface with respect to the abutting surface of the frame portion, and the stepped surface is provided with a plurality of projections capable of abutting against the mounting seat surface.