JPH07289820A - Filter for sedimental solution, such as coating material - Google Patents

Abstract

PURPOSE:To provide a filter for a sedimental solution, such as coating material, which substantially prevents sedimentation of the sedimental material therein and permits easy exchange of a filter cartridge. CONSTITUTION:This filter is provided with a rolling section 40 which is formed by fitting an outer pipe 42 onto an inner pipe 41, is fitted with a V-packing 46 to assure liquid-tightness and is turnable around the same axis between a filter body 10 and a juncture of a lap joint 20 to a coating material supply pipe. Supplying of the coating material is then executed by fixing this filter body 10 to an upper position with respect to the coating material supply pipe. The filter cartridge is exchanged in the state of turning the filter body 10 in a downward position with respect to the coating material supply pipe. The coating material advances into the filter body 10 from below and is discharged downward at the time of supplying the coating material and, therefore, the sedimental material in the coating material liquid hardly settles in the filter body 10. There is no leakage of the coating material liquid at the time of turning and the coating material liquid does not overflow from the filter body at the time of exchanging.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for settling solution such as a paint filter for connecting to a paint supply passage between a paint supply pump and a painting site in a paint shop or the like.

[0002]

2. Description of the Related Art For example, as equipment for pumping paint prepared in a paint preparation room to a coating site in a factory, paint supplied from a pump to a painting site in order to supply a uniform paint. There is a paint circulating and feeding system in which the paint is circulated again to the pressure pump to prevent the precipitation of solid matters in the paint such as pigments in a constantly flowing state. In such a paint circulation supply system, in order to prevent foreign materials mixed in the paint circulation path from being pressure-fed to the painting site, the paint sent from the pressure pump is applied after the foreign materials are removed by the paint filter in the path. It is pumped to the scene.

Conventionally, the paint filter used in the above paint supply passage is provided with a bottom plate cover 12 below a head 11 having joints 101 and 102 connected to the paint supply passage on both sides, as shown in FIG. Filter housing 1 in which a shell 13 is fixed via a rod 14
5, a hollow filter cartridge 103 is disposed in the head 5, and the head 1 communicates with the joint 101 on the inlet side.
The paint that has entered through the inlet nozzle 11a of the first filter 1 is discharged from around the filter cartridge 103.
3 is filtered toward the center side of the filter cartridge 3, and then is moved upward in the hollow portion of the filter cartridge 103 to be pressure-fed from the joint 102 on the outlet side to the paint supply passage. Incidentally, 104 is a guide spring for arranging the filter cartridge 103 at a predetermined position in the shell 13, and 105 is a connecting portion for various measuring gauges. In the above paint filter, when replacing the filter cartridge 103, the nut 16 provided at the tip of the rod 14 is loosened, the shell 13 is removed from the head 11, and the filter cartridge 103 inside is replaced.

[0004]

However, in the paint filter having the above structure, when the shell 13 is removed from the head 11 and the filter cartridge 103 is replaced,
Since it is necessary to prevent the paint liquid in the filter housing 15 from leaking out, the filter housing 15 for housing the filter cartridge 103 must be arranged below the paint supply passage. For this reason, the paint supplied to the paint filter first moves downward in the shell 13 and then moves upward, so that the sedimentary substance such as a pigment in the paint having a large specific gravity with respect to the solvent is filtered by the filter housing 15.
There is a problem that the filter cartridge 103 easily precipitates on the bottom.

An object of the present invention is to provide a filter for a sedimentary solution such as a coating material, in which a sedimentable substance in the coating material is unlikely to settle inside and the filter cartridge can be easily replaced.

[0006]

A filter for a paint-precipitating solution according to the present invention is a filter for a paint-precipitating solution that is connected to a solution supply pipe, and is used for a head having a solution inlet and an outlet. To the solution supply pipe, two joints provided in the head and communicating with the inlet and the outlet, respectively, It is a technical means to provide two rotating members which are each provided between the connecting portion and the connecting portion and which are rotatable in the liquid-tight state about the same axis.

According to a second aspect of the present invention, the rotating member includes an inner tube having a flange, an outer tube fitted to the outer side of the inner tube via a liquid-tight member, and the flange so as to freely rotate inside. It is configured by a cap nut fitted and screwed to the outer pipe. In Claim 3, a large diameter portion for arranging the liquid tight member is formed in the outer pipe, and the liquid tight member is arranged between the large diameter portion and the flange of the inner pipe. The technical means consists of a V packing and a coil spring.

[0008]

In the present invention, since the joint has the rotating member, the filter main body is rotatable with respect to the solution supply pipe, and therefore the filter main body is arranged above the solution supply pipe. In this state, when the solution is supplied, the solution passes through the joint on the inlet side and the rotating member, then enters the inside of the filter body from the inlet of the head, and moves upward to pass through the filter cartridge to be filtered. After that, it moves downward, flows out from the outlet of the head to the outside of the filter body, and is sent out to the solution supply pipe.

During this time, the settling substance having a large specific gravity such as pigment in the solution smoothly moves upward from the inlet of the head due to the flow velocity when entering the filter body, and after passing through the filter cartridge, the filter body Since it flows out from the outlet of the head located below the filter, it does not settle and accumulate in the filter body.

Further, when the filter cartridge has a low filtering ability and is to be replaced,
With the supply of the solution stopped, the filter body is rotated to be positioned below the solution supply pipe. Then, the filter body is removed and the filter cartridge inside is replaced. At this time, the shell or the like of the filter body is located below the solution supply pipe, so that the solution does not collect in the filter body and leak from the filter body. After the replacement of the filter cartridge, the filter body is rotated again so as to be located above the solution supply pipe, and then the solution is supplied.

[0011]

According to the present invention, when the solution is supplied, the filter body can be positioned above the solution supply pipe, so that the sedimentary substance having a large specific gravity such as pigment in the solution passing through the filter body is No precipitation or accumulation in the filter body. When replacing the filter cartridge, the shell of the filter body can be removed while the filter body is positioned below the solution supply pipe, so the solution inside the filter body leaks to the outside. And the filter cartridge can be easily replaced.

[0012]

EXAMPLES The present invention will now be described based on examples of the paint filter 1 shown in the drawings. The paint filter 1 shown in FIG. 1 includes rolling parts 40 and 40A between a filter body 10 and respective lap joints 20 and 30 for connecting the filter body 10 to a paint supply pipe. The filter body 10 has a structure equivalent to that of the conventional paint filter described above. The head 11, the shell 13 and the bottom plate cover 12 are integrated by rods and nuts 16 via some gaskets, respectively. The filter is made of fibers or a filter cartridge made of wire mesh or the like (see FIG. 4).

Each of the lap joints 20 and 30 is provided with a disc-shaped inlet flange 21 and an outlet flange 31 corresponding to the paint supply pipe to be connected, and each flange 2
The bolts and nuts penetrating through the through holes 22 and 32 formed in Nos. 1 and 31 are used to fasten the flange of the paint supply pipe to connect with the paint supply pipe.

As shown in FIG. 2, the rolling portions 40 and 40A are capable of rotating an inner tube 41 fixed to the head 11 of the filter body 10 and an outer tube 42 connected to the lap joints 20 and 30, respectively. It is connected to. The rolling section 40A is the rolling section 40A.
Since it has the same structure as the above, only the rolling portion 40 will be described below as a representative. A flange 43 is provided on the outer side in the middle of the inner pipe 41, and the inner pipe 41 is inserted into the outer pipe 42 from its tip to about the flange 43.

The outer pipe 42 has a large diameter portion 44 in which the inner diameter of the portion other than the tip of the inserted inner pipe 41 is slightly larger than the outer diameter of the inner pipe 41, and the length of the large diameter portion 44 is the inner side. The length is set shorter than the insertion length of the pipe 41, and a space 45 is formed inside the large diameter portion 44 between the outer pipe 42 and the inner pipe 41. In this space 45, a V packing 4 for ensuring liquid tightness between the outer pipe 42 and the inner pipe 41.
6 and a coil spring 47 for pressing the V packing 46 are arranged. In order to ensure liquid tightness, the V packing 4
Instead of 6, an O-ring or another member such as a mechanical seal may be used.

The outer tube 42 has a male screw 4 on the outer side of the distal end.
8 is formed and is screwed with the female screw 51 of the cap nut 50 to connect the inner pipe 41 and the outer pipe 42. further,
Outer peripheral surface of the flange 43 of the inner pipe 41 and the cap nut 50
Grooves 49 and 53 are formed on the inner peripheral surface of each of them, and a large number of metal balls 55 as rolling members are inserted between the grooves 49 and 53 from the insertion holes 54 formed in the cap nut 50. After being inserted, the insertion hole 54 becomes the sealing member 56.
Sealed by. The metal balls 55 allow the cap nut 50 to smoothly rotate with respect to the outside of the inner pipe 41 and be fastened to the outer pipe 42.

With the above structure, the rolling portion 40 is
When the cap nut 50 is tightened, the tip of the cap nut 50 comes into contact with the end surface of the thick portion 44a of the outer pipe 42, and the friction causes the outer pipe 42 and the cap nut 50 to be integrated with each other, so that the inner pipe 41 has a flange. 43 is rotatably loosely fitted inside the cap nut 50 and the outer tube 42. Therefore, the inner pipe 41 becomes rotatable with respect to the outer pipe 42 and the cap nut 50. At this time, the V packing 46 is pressed by the elastic force of the coil spring 47, and the inner pipe 41 and the outer pipe 4 are urged.
Since it is pressed against 2, the liquid tightness between the inner pipe 41 and the outer pipe 42 is secured.

In the paint filter 1 of the present embodiment having the above-mentioned structure, for example, as shown in FIG. 3, in the paint circulation supply system 2, the paint side of the paint supply pump 4 provided in the mixing tank 3 and the like and the coating are applied. It is used as a line filter by being arranged in the paint supply pipe 6 between the spray gun 5 and the spray gun 5. In addition, 7 is a surge tank. In the paint circulation supply system 2 described above, the filter body 10
Since it is rotatable with respect to the paint supply pipe 6, the filter body 10 can be arranged and fixed so as to be located above the paint supply pipe 6.

In this state, when the paint supply pump 4 is operated and the paint is circulated and supplied, the paint passes through the lap joint 20 and the rolling portion 40 on the inlet side, and then enters the filter body 10 from the inlet of the head 11. Then, while moving upward, it is filtered by passing through an internal filter cartridge, then moves downward, flows out of the filter main body 10 from the outlet of the head 11, and is sent out to the paint supply pipe 6. During this time, the sedimentable substance having a large specific gravity such as pigment in the paint smoothly moves upward from the inlet of the head 11 due to the flow velocity when entering the filter body 10, and after passing through the filter cartridge, the filter body 10 Since it flows out from the outlet of the head 11 positioned below the filter 11, it does not precipitate or accumulate in the filter body 10.

When the filter cartridge has a low filtering ability and is to be replaced,
As shown by the chain line in FIG. 3, the filter body 10 can be rotated to be positioned below the paint supply pipe 6. With the paint supply pump 4 stopped, the shell 13 of the filter body 10 is removed from the head 11 and the filter cartridge inside is replaced. At this time, the shell 13, the bottom plate cover 12, and the like are located below the paint supply pipe 6, so that the paint liquid does not collect in the container including the shell 13 and the bottom plate cover 12 and leaks to the outside. After the replacement of the filter cartridge, the filter main body 10 is rotated again so as to be located above the paint supply pipe 6, and then the supply of paint is restarted.

As described above, according to the present invention, at the time of supplying the coating material, a uniform coating material can be supplied without depositing or accumulating in the filter body 10 a sedimentary substance having a large specific gravity such as a pigment. . Further, when the filter cartridge is replaced, the filter body 10 can be rotated to the lower side of the paint supply pipe 6, so that the replacement can be easily performed. Further, since the V packing 46 and the coil spring 47 are arranged between the inner pipe 41 and the outer pipe 42, when the filter body 10 is rotated with respect to the paint supply pipe 6, the inner pipe 41 is rotated. The paint does not leak from between the outer pipe 41 and the outer pipe 42. Although the paint filter is shown in the above embodiment, the paint filter can be similarly used in a filter used for another solution containing a sedimentation substance.

[Brief description of drawings]

FIG. 1 is a front view showing an appearance of a paint filter according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a rolling portion of the paint filter according to the embodiment of the present invention.

FIG. 3 is a schematic diagram showing a paint circulation supply system using the paint filter of the present invention.

FIG. 4 is a cross-sectional view showing a conventional paint filter.

[Explanation of symbols]

 1 paint filter (filter for sedimentary solution such as paint) 6 paint supply pipe (solution supply pipe) 10 filter body 11 head 13 shell 20 30 lap joint 40 40A rolling part (rotating member) 41 inner pipe 42 outer pipe 43 flange ( 44) Large diameter part 46 V packing (liquid tight member) 47 Coil spring 50 Cap nut

Claims (3)

[Claims] 1. A filter for a precipitating solution such as a paint, which is connected to a solution supply pipe, wherein a filter cartridge is provided in a shell detachable from a head having an inlet and an outlet for the solution. And two joints provided in the head and communicating with the inlet and the outlet, respectively, and the same joint in a liquid-tight state provided between the head of the two joints and a connection portion to the solution supply pipe. A filter for a precipitating solution such as a paint, comprising two rotating members which can be rotated around. 2. The rotating member includes an inner tube having a collar,
An outer tube which is fitted to the outer side of the inner tube via a liquid-tight member, and a cap nut which is rotatably fitted in the brim inside and is screwed into the outer tube. The filter for sedimentable solution such as the paint according to 1. 3. A large diameter portion for arranging the liquid tight member is formed on the outer pipe, and the liquid tight member is arranged between the large diameter portion and the flange of the inner pipe. 3. A filter for a paint-precipitating solution according to claim 2, which is composed of a V packing and a coil spring.