JPS6145907Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a hopper for recovering cleaning thinner generated when changing the color of paint, and is particularly suitable for recovering cleaning thinner generated when changing the color of paint in multi-color automatic painting of outer panels of automobile bodies. This is about a collection hopper.

Conventionally, in this type of collection hopper, as shown in FIG. 1, a socket 52 is provided in the upper part of a box-shaped container 51, and a primary filter 53 is arranged in the lower part thereof. Further, a pipe 54 communicating with a relay tank (not shown) is provided at the bottom thereof, and a secondary filter 55 is provided so as to cover this pipe 54. And box-shaped container 5
1 has a structure in which an outlet 56 is opened in the side wall of the filter 1 so that cleaning thinner overflows when the secondary filter 55 becomes clogged. However, such a recovery hopper has the following problems.

(1) Cleaning thinner with a high solid content collects at the bottom of the box-shaped container 51, which tends to clog the secondary filter 55, which increases the frequency of cleaning and replacement of the secondary filter 55.

(2) As a countermeasure against clogging of the secondary filter 55 mentioned in (1) above, there is a method of making the opening of the secondary filter 55 coarser, but in this case, the secondary filter 55 is connected to a relay tank (not shown). Pipe 5
4 is stuck.

(3) Replacing the secondary filter 55 in (1) above requires an extremely large number of man-hours.

(4) As described in (1) and (2) above, if the secondary filter 55 becomes clogged, a large amount of cleaning thinner will flow out from the outlet 56, making it impossible to recover the thinner after cleaning and disposing of waste liquid. The defect is that the bacteria used to treat waste liquid are killed by the thinner that flows into the facility after cleaning.

The present invention was developed to solve the problems of the conventional technology as described above, and its purpose is to prevent clogging of the secondary filter due to cleaning thinner generated each time the paint color is changed, and to prevent the recovery hopper from clogging. To provide a cleaning thinner recovery hopper capable of preventing clogging of a pipe from a pipe to a relay tank.

The recovery hopper of the present invention has a primary filter installed below the cleaning thinner socket, and a primary tank with an overflow outlet provided approximately in the center of the side wall, which communicates with the outlet of the primary tank. The primary tank consists of a secondary tank with a pipe connected to the relay tank at the bottom, and a secondary filter installed to cover this pipe. After cleaning the paint gun, the thinner is filtered through a primary filter, and then the thinner with a high solid content is separated into the lower part and the thinner with a low solid content is separated into the upper part by natural gravity sedimentation. The thinner overflows from the outlet and is received in the secondary tank, and then
Next, it is filtered with a filter.

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings.

FIG. 2 shows a longitudinal sectional view of the recovery hopper of the present invention. In FIG. 2, 1 is a box-shaped primary tank, and a socket 2 is formed in the upper part of the primary tank 1 to allow the thinner to flow in after cleaning.
A wire mesh-like filter 3 consisting of 3 to 5 meshes is disposed below the socket 2. and,
An outlet 4 is provided approximately in the center of the side wall, and this outlet 4 is for overflowing the cleaning thinner supplied into the primary tank 1. Further, a box-shaped secondary tank 5 is provided on the side wall of the primary tank 1, and this secondary tank 5 communicates with the outlet 4 of the primary tank 1 through an inlet 6. The connection between the primary tank 1 and the secondary tank 5 is to connect the outlet ports 4 and 2 on the primary tank 1 side.
The opening pieces 13 and 13' provided at the inlet 6 of the next tank 5 are connected to each other by folding them toward each other. Further, the bottom of the secondary tank 5 is formed into a tapered shape, and a pipe 7 is provided on the bottom surface. A wire mesh-like secondary filter 8 made of 10 to 20 meshes is provided above the pipe 7 so as to cover the pipe 7. Furthermore, an opening 9 is provided at the top of the secondary tank 5 to facilitate cleaning and inspection of the secondary filter 8.
A lid 10 is disposed in this opening 9. Note that 11 is an outlet opened in the side wall of the secondary tank 5, and 12 is a fixed plate holding the primary filter 3. Also, 14 is the primary tank 1
This is a holding plate that removably holds the.

The operation of the recovery hopper configured as above will be explained.

When changing colors, the cleaning thinner supplied to the paint supply system is discharged from a paint supply pipe (not shown) and a paint gun (not shown) to a socket 2 provided at the top of the primary tank 1. The water then flows through the primary filter 3 located below the socket 2. This primary filter 3 separates the paint into raw paint, which contains almost no cleaning thinner, and cleaning thinner, which contains solids. The raw paint that has not passed through the primary filter 3 is appropriately removed, and the washed thinner that has passed through the primary filter 3 is collected in the primary tank 1. In this primary tank 1, the cleaning thinner with a high solid content is separated into the lower part and the cleaning thinner with a low solid content is separated into the upper part by gravity sedimentation. Among these cleaning thinners, only the cleaning thinner with a low solid content overflows from the outlet 4 of the primary tank 1 and flows into the secondary tank 5. The cleaning thinner with a low solid content that has flowed into the secondary tank 5 is further separated into cleaning thinner with a high solid content and cleaning thinner with a low solid content by a secondary filter 8 disposed at the bottom. The cleaning thinner having a low solid content that has passed through the secondary filter 8 is sent through a pipe 7 to a relay tank (not shown) in the recovery system. Further, the cleaning thinner with a high solid content that has not passed through the secondary filter 8 is gradually diluted by the subsequent cleaning thinner with a low solid content that flows from the primary tank 1 and passes through the secondary filter 8. , and sent to a relay tank (not shown) in the recovery system. By this, 2
The solid content of the cleaning thinner that passes through the next filter 8 can be reduced to 10% or less, and the pipe 7 connected to the relay tank of the recovery system can be completely free from clogging.

As explained in detail above, according to the recovery hopper of the present invention, the cleaning thinner used during color change is passed through the filter in the primary tank to separate the syrup-like raw paint that contains almost no cleaning thinner. However, only the cleaning thinner containing solids is stored in the primary tank, and the cleaning thinner with a low solids content in the upper lighting liquid is further allowed to flow into the secondary tank using gravity sedimentation. It can almost eliminate clogging of the secondary filter installed at the bottom of the tank.
This allows the frequency of cleaning and replacement of the secondary filter to be significantly reduced. Furthermore, since the cleaning thinner that passes through the secondary filter has a low solid content, it has the effect of completely eliminating clogging of the pipes connected to the relay tank. Furthermore, since the lid is provided on the top of the secondary tank, cleaning and inspection of the secondary filter disposed at the bottom of the secondary tank is easy.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of a conventional collection hopper;
The figure is a longitudinal sectional view of the collection hopper of the present invention. 1...Primary tank, 2...Socket, 3...Primary filter, 4...Outlet, 5...Secondary tank, 6
...Inflow port, 7...Pipe, 8...Secondary filter, 9...Opening, 10...Lid.

Claims (1)

[Scope of utility model registration request] In the recovery hopper for cleaning thinner used when changing paint colors in multi-color painting, a primary filter is installed below the cleaning thinner socket, and a primary tank is installed with an overflow outlet approximately in the center of the side wall. A cleaning thinner recovery hopper comprising: a secondary tank communicating with the outlet of the primary tank and having a pipe at the bottom leading to a relay tank, and a secondary filter disposed to cover this pipe.