JPH048963Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a paint filter that is one of the components of a paint circulation system.

[Prior art] A paint circulation device is a device for centrally supplying paint to various painting machines.Since the pigments contained in paint have the property of settling over a long period of time, in the case of concentrated supply of paint, Generally, paint piping is installed so that it travels around the factory from a paint tank via a pressure pump, and then returns to the paint tank again, so that the paint can circulate and flow through the piping. A paint filter is installed in the middle of the piping of this paint circulation system (usually at the pump outlet) for the purpose of removing foreign matter from the paint.

The conventional paint filter, as shown in Figure 2,
Paint outlet 10b in the center, paint inlet 10 around it
A cylindrical filter case 20 with one end closed and having an internal space 20a that communicates the paint inlet 10a and the paint outlet 10b is attached to the lower surface of the filter base 10 having a diameter of 10a and paint outlet 10
A cylindrical filter element 40 is housed in such a manner as to block communication with the filter element 40.The paint pumped by the pressure pump flows into the filter case 20 from the paint inlet 10a, and the filter element 40 through which it flows to the paint outlet 10b. Then, when the paint passes through the filter element 40, foreign matter in the paint is removed.

By the way, according to this conventional paint filter,
Since the flow rate of the paint decreases inside the filter case 20, the liquid flow stagnates particularly in the lower part of the filter case 20 away from the paint inlet 10a and the outlet 10b, resulting in a drawback that pigment sedimentation A occurs in the paint.

[Problems to be solved by the invention] This invention was made in view of the above-mentioned drawbacks.The paint flows smoothly and there are no pockets where the liquid flow stagnates, thereby preventing the paint from settling. An object of the present invention is to provide a paint filter that can supply paint in a homogeneous state.

[Means to solve the problem] The measures taken to achieve the above purpose are as follows:
As shown in the figure, there is a filter base 1 having a paint outlet 12 in the center and a paint inlet 11 around it, and
A cylindrical filter case 2 with one end closed and having an internal space 21 that communicates with the paint outlet 12.
and a cylindrical filter element 4 housed in the internal space 21 of the filter case 2 so as to block communication between the paint inlet 11 and the paint outlet 12. A spiral protrusion 22 that arranges the filter case 2 and guides the flow of paint pumped from the paint inlet onto the inner peripheral surface of the filter case 2.
This is because we have established the following.

[Operation] The paint fed under pressure from the paint inlet 11 flows into the space formed by the filter case 2 and the filter element 4. Since a spiral protrusion 22 is provided on the inner peripheral surface of the filter case 2, the inflowing liquid flow rises around the filter element 4 as a spiral flow along the protrusion. During this time, the paint flows through the filter element 4 to the paint outlet 12.

According to this invention, since the paint flows smoothly and the liquid flow does not stagnate, it is possible to prevent the paint from settling and to supply the paint in a homogeneous state.

[Example] An embodiment of this invention will be described in detail below.

In FIG. 1, a filter base 1 is provided with a paint outlet 12 at the center of its upper surface and a paint inlet 11 around it. These paint inlet 11 and outlet 12 are aligned in a straight line with their lower portions turned at right angles in order to connect to a straight paint pipe. A cylindrical filter case 2 having an internal space 21 that communicates a paint inlet 11 and an outlet 12 is attached to the upper surface of the filter base 1, and the upper end of the filter case 2 is closed with a filter cap 3. Further, on the inner peripheral surface of the filter case 2, a spiral protrusion 22 is provided over almost the entire length, starting from a portion corresponding to the paint inlet 11 of the filter base 1. A cylindrical filter element 4 is housed in the interior space 21 of the filter case 2 so as to block communication between the paint inlet 11 and the outlet 12.

To attach the filter case 2 to the filter base 1, install the filter case 2 and the filter base 1 between the filter case 2 and the filter base 1.
Seal rings 5 and 6 are interposed between the filter case 2 and the filter cap 3, respectively, and a set bolt 7 is passed through the filter cap 3 and the filter element 4 and screwed into the center of the filter base 1.

In the paint filter of this invention, the paint fed under pressure from the paint inlet 11 flows into the space between the filter case 2 and the filter element 4 as shown by the arrow, and the paint enters the space between the filter case 2 and the protrusion 22.
collides with the protrusion 2 around the filter element 4.
2 and rises as a spiral flow. During this time, the paint flows from the entire circumference of the filter element 4 through the filter element 4 to the paint outlet 12.

[Effects of the invention] As described above, according to this invention, the paint flows smoothly in the filter case and the liquid flow does not stagnate, which prevents the paint from settling.
Paint can be supplied in a homogeneous state.

Further, the entire circumferential surface of the filter element can be used uniformly, which has the effect of reducing the frequency of filter element replacement.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of a paint filter showing an embodiment of this invention, and FIG. 2 is a vertical sectional view of a conventional paint filter. 1...Filter base, 11...Paint inlet, 1
2...Paint outlet, 2...Filter case, 22...
...Spiral projection, 4...Filter element.

Claims (1)

[Scope of utility model registration request] A filter base having a paint outlet in the center and a paint inlet around the filter base; a cylindrical filter case with one end closed and attached to the filter base and having an internal space for communicating the paint inlet and the paint outlet; In a paint filter equipped with a cylindrical filter element housed in an internal space of the case so as to block communication between a paint inlet and a paint outlet, the filter case is arranged on the upper surface of the filter base, and the filter case is A paint filter characterized in that a spiral protrusion is provided on the inner peripheral surface to guide the flow of paint pumped from a paint inlet.