JPS5936257Y2 - Strainer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a strainer for removing dust and the like contained in a fluid using a wire mesh.

For example, the strainer 1 used in a car cooler has a first
It is located in the upstream region of the expansion valve 2 in the refrigeration cycle as shown in the figure, and filters dust, minute metal pieces, etc. in the refrigerant that flows in through the through hole 4 of the adapter 3 shown in FIG. It is something to do.

In addition to manufacturing the mesh part 5 of the conventional strainer 1,
Each piece of the two-layered wire mesh 6, 7 shown in FIG. 3 is bulged outward to form a hollow bag portion, and the outer periphery 8 of this bag portion is bonded with an adhesive (epoxy resin, etc.). Then, the second
A mesh portion 5 shown in the figure is formed.

When gluing the wire meshes 6 and 7 together at the outer peripheral edge 8, in order to enhance the adhesion effect of the adhesive on the wire meshes 6 and 7, the meshes of each wire mesh 6 and 7 are aligned, and the wire meshes 6 and 7 are also bonded together. - The graticule lines 6a and 7a can be in line contact with each other.

Thereafter, when an adhesive is applied so that the adhesive permeates between the lines 6a and 7a that are in contact with each other, the outer peripheral edges are firmly bonded.

Further, when gluing the wire mesh 6.7 at the outer peripheral edge 8, the meshes of each wire mesh 6.7 are aligned as described above, and
The outer peripheral edge 8 is bonded so that the latitude and latitude lines 6a and 7a of each wire mesh 6 and 7 are at Oo or 90 degrees with respect to the axis of the strainer.

However, when the mesh portion 5 is produced by overlapping the meshes of both wire meshes and using adhesive in this way, the workability is extremely poor.

For example, in order to enhance the adhesive effect of the adhesive,
It requires the work of aligning the meshes of both wire meshes 6 and 7, and the step of applying adhesive with the meshes of the wire meshes 6 and 7 aligned,
The work is extremely complicated.

Further, the mesh portion formed by overlapping the latitude and latitude lines described above may become frayed before the adhesive is applied.

This means that the latitude and latitude lines 6a and 7a of each of the wire meshes 6 and 7 are 0 with respect to the axis of the strainer.

This is because, since the strainer is made to have an angle of 90°, the graticules parallel to the axis of the strainer (Oo) and the graticules perpendicular to the axis (90°) are likely to fray at the outer peripheral edge 8.

Also, when using adhesives, if you touch the adhesive directly with epoxy resin adhesives, your hands may get irritated, and if you use solvent-based adhesives, after applying the adhesive,
It must be dried in a drying chamber, and harmful volatile components are emitted during this drying.

Furthermore, when applying this adhesive, it is extremely difficult to apply it only to the outer periphery of the mesh part 5 and prevent it from getting on other parts. This will result in a decline in ability.

The present invention was developed in view of these circumstances, and is a strainer with good workability and high filtration capacity.
The purpose is to provide a strainer that does not fray.

In order to achieve this objective, the present invention provides a strainer in which each piece of two wire meshes is bulged outward to form a mesh portion in the form of a hollow bag. Both wire meshes are arranged so that the intersecting angle between the lines is other than 0° or 90', and the intersecting angle between each graticule and the axis of the strainer is other than 0° or 90°. The peripheries of the mesh portions of both wire meshes are resistance welded using a pair of electrode tips.

Hereinafter, embodiments of the strainer according to the present invention will be described with reference to the drawings.

FIG. 4 is a longitudinal cross-sectional view of the strainer 10, in which the hollow bag-like mesh portion 11 is connected to the adapter 12.
It is fixed by welding, etc.

To form this mesh portion 11, two wire meshes 13, 14 are overlapped as shown in FIG. 6, and a mandrel 15 is inserted between the wire meshes 13, 14.

In particular, when these two wire meshes 13.14 are overlapped, the mutual intersection angle θ between the graticules 13a and 14a of both wire meshes 13.14 is set to Oo or an angle other than 90°, and each of the graticules of both wire meshes The intersecting angle between the line and the axis of the strainer is O.

Or the angle is other than 90'.

This will be explained in detail based on FIG. 5 as follows.

FIG. 5 is a plan view of wire meshes 13 and 14 stacked together for manufacturing the mesh part 11 according to the present invention.

In the figure, the diagonal line downward to the left indicates a part of the graticule 13a in the wire mesh 13, and the diagonal line downward to the right indicates a part of the graticule 13a in the wire mesh 14.
A part of 4a is shown.

Further, the reference numeral 17 in the figure indicates the axis of the strainer.

According to actual experiments, the intersecting angle θ between the graticules 13a and 14a of both wire meshes 13 and 14 is 20° to 70° (the intersecting angle between the graticules 13a and 14a and the axis 17 of the strainer) is preferably between 10° and 35°), and within this range, the joint halves 16 of both wire meshes 13 and 14 will have a predetermined value of joint strength when resistance welding, which will be described later, is performed.

This is because each graticule 1 of both wire meshes 13 and 14
If the intersecting angle θ between 3a and 14a is set between 20° and 70°, the number of points of contact between the graticules 13a and 14a will increase, and the joint strength will increase when the mesh portion periphery 16 is welded. It is.

The relationship between the intersection angle of both wire meshes 13 and 14 and the joint strength is shown in the first
Shown in Figure 0.

As is clear from Figure 10, the optimal angle of this intersection angle θ is 45°, but it is distributed between the two wire meshes 13° and 14 so that they are symmetrical with respect to the axis of S. I. and Rede. and each side is inclined from the strainer axis 17 by 22°30'.

However, it is difficult to actually achieve this angle, so it is convenient to incline each wire mesh by 20 degrees and set the intersection angle θ to 40 degrees.

If the two wire meshes are intersected at such a crossing angle θ, the graticules 13a and 14a of each of the twenty wire meshes 13 and 14 will deform when pressure is applied, and each wire mesh will blind the other's eyes. .

Furthermore, when resistance welding is performed by passing a current in such a pressurized state, the two wire meshes are welded together at a large number of contact points on the two wire meshes, and the connection becomes stronger.

However, if the electrode tip 18 used for this resistance welding has a pointed end like the one used for normal spot welding, it is difficult to generate instantaneous overall heat generation, so the outer shape is similar to that of the mesh part 11 as shown in FIG. It has the same horseshoe shape, but its cross section is inverted.

There are 1,000 pairs of electrode tips 18, each of which is mounted on a pedestal 19, but the horseshoe-shaped curved tip 20 and the other straight portion 21 have different amounts of heat per unit area ( (The amount of heat generated at the tip 20 is larger), and there is a risk that the welded part made with this tip 20 will melt, so the pedestal 1 that should support this tip 20
9 is partially cut out to form a cavity 22.

Since this resistance welding is performed with both wire meshes 13 and 14 pressurized as described above, the electrode material for normal spot welding,
For example, copper, cadmium copper, chromium copper, etc. have sufficient electrical conductivity but insufficient hardness and lack durability.

Therefore, it has been found that molybdenum is the most suitable electrode material for such a wire mesh.

A table comparing this molybdenum with other materials is shown below.

As shown in the table, if stainless steel with poor current conductivity is used for the electrode tip, there is a risk that the tip will melt due to heat generation and stick to the wire mesh, and if copper is still soft, it will not be able to withstand long-term use. Therefore, molybdenum is optimal for such chips.

Next, in order to manufacture the SLADE, as shown in FIG. With the mandrels 15 inserted into both wire meshes, two wire meshes are stacked so that the intersection angle is 20°, and electricity is applied by applying pressure from above and below with electrode tips 18.

Note that this resistance welding may be performed simultaneously at several locations using a long wire mesh, or may be performed continuously while moving the wire mesh.

As shown in FIG. 7, in order to pull out the mandrel 15 from the mesh part 11 formed in this way and to make it easier to attach the adapter 12, a part of the open end of the mesh part 11 into which the mandrel 15 has been inserted is cut. Missing, adapter 12
An insertion allowance 23 is made for insertion into the through hole 12a.

As shown in FIG. 8, the adapter 1 is attached to this mesh part 11.
2, and connect the mesh part 11 and the adapter 12 using a normal spora I, deep liquid 24, brazing, etc.

By cutting off the outer periphery of the welded portion 16 that has been welded by the connection resistance, the sled is shaped.

Since this strainer affects this kind of structure, the welded part 16
The graticule lines 13a and 14a do not protrude from the end face of the blade, and there is no fraying as described above.

As is clear from the above description, according to the present invention, in the S.I. lede in which each piece of two-layered wire mesh is bulged outward to form a hollow bag-like mesh part,
The intersecting angle between the graticules of both wire meshes is an angle other than Oo or 90', and the intersecting angle between each graticule of both wire meshes and the axis of the strainer is an angle other than Oo or 90'. Since both wire meshes are arranged and the peripheries of the mesh portions of both wire meshes are resistance welded using a pair of electrode tips, the strainer can be manufactured without using adhesives as in the past, and its workability is greatly improved. It turns out.

Furthermore, since the adhesive does not adhere to the mesh portion during this manufacturing process, the filtration ability of the sled will not be reduced.

Furthermore, the inclination of the graticule lines described above prevents fraying at the ends of the mesh part, so if the bottom shape is cut as much as possible after welding, there is no need to worry about fraying, which is extremely effective. Become.

[Brief explanation of the drawing]

Fig. 1 is a refrigeration circuit diagram of Kartarara, Fig. 2 is a perspective view of a conventional strainer, Fig. 3 is an explanatory diagram showing the intersecting angle of the wire mesh used in the strainer, and Fig. 4 is a diagram of the strainer according to the present invention.・
Figure 5 is an explanatory diagram showing the intersecting angle of the wire mesh used when manufacturing the same strainer, Figure 6 is a new view showing an example of the strainer.
Figure 8 is a perspective view showing the manufacturing order of the strainer, circle 9 is a perspective view of an electrode tip used in manufacturing the strainer, and Figure 10 is a graph showing the relationship between the intersecting angle of the wire mesh and the bonding strength. 10... S1 Helena, 11... Mesh part, 12... Adapter, 13.14...
...wire mesh, 13a, 14a... graticule, 1
6...Welding part, 17...Axis line, 18
・・・・・・Electrode tip.

Claims (3)

[Scope of utility model registration request] (1) In a strainer made of two stacked wire mesh pieces each bulging outward to form a hollow bag-like mesh part, the intersecting angle between the latitude and latitude lines of both wire meshes is Oo or 90°. The two wire meshes are arranged so that the intersection angle between each graticule and the axis of the strainer is at an angle other than Oo or 90', and the periphery of the mesh part of both wire meshes is A strainer made by resistance welding the electrode tip. (2) The intersecting angle between the graticules and graticules of both wire meshes is 20° to 7
The strainer according to claim 1 of the utility model registration, characterized in that the strainer has an angle of 0°. (3) The strainer according to claim 2 of the utility model registration, characterized in that the angle of intersection between each latitude and latitude of both wire meshes and the S I-Rade axis is 10° to 35°.