JP2539978B2 - Shut-off valve for connecting dual-structure filter vessels - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a shutoff valve for connecting a filter container using a cartridge filter incorporated in a line.

[0002]

2. Description of the Related Art For filtering liquids such as paints and inks, generally, a container containing one or more cylindrical cartridge filters is connected to a pipe for the liquid to be purified and directed from the outside to the inside. The liquid is allowed to pass through to collect impurities and aggregates of particles for purification, and the accuracy of the filter or the number of filtration stages is determined according to the required filtration level.

Since the paint contains harmful pigments and an organic solvent which has an irritating odor and is potentially inflammable, the housing must be a closed container that can withstand filtration pressure and does not leak contents. is there. Further, when the filter is clogged after being used for a long time and the pressure in the housing reaches a predetermined control limit pressure, it is necessary to replace the internal cartridge filter with a new one.

However, since the line cannot be stopped for a long time due to this replacement work, the actual opening 1-37.
Although there is a method of replacing the entire filter container as a disposable as disclosed in Japanese Patent No. 690, it is economically problematic to dispose of a container having a structural strength. Also, in order to save the troublesome cleaning of the inner surface of the housing during the filter replacement work, the filter is wrapped in a film and used, and after use, the filter is discarded together with the film.
Although it is disclosed in Japanese Patent Publication No. 7, the liquid leakage and strength anxiety at the time of removal remain.

[0005]

SUMMARY OF THE INVENTION The present invention has been made under these circumstances, and an object of the present invention is to prevent liquid leakage during filter replacement, and to perform replacement work safely, cleanly and quickly. In order to realize a container, it is to provide a small-sized and inexpensive closing valve for connection, which is used for the container.

[0006]

SUMMARY OF THE INVENTION The present invention has a double-layer container for accommodating a filter, a pressure-resistant container having a permanent structure on the outside, and a unit container containing a cartridge filter on the inside. The present invention relates to a shut-off valve for connection of a double-structured filter container that is to be replaced or discarded together with an internal unit container, and the above-mentioned object of the present invention consists of a sheath and a unit container housed therein.
The unit container contains a predetermined cartridge filter and has a liquid inlet and a liquid outlet that can be fitted to the liquid inlet pipe and the liquid outlet pipe provided on the pedestal of the sheath, respectively. The port and the liquid discharge port are each provided with a shutoff valve, and the channel is opened by fitting and setting the unit container on the pedestal, and is closed at the same time when the unit container is removed from the pedestal. In the double structure filter container according to the above, the shut-off valve is made of a plastic molded body, and a plurality of legs are attached around the disc-shaped valve body at a constant angle, and the leg is in a state in which the valve body is pushed up and opened. In this case, it is achieved by a shut-off valve for connecting the dual structure filter container, which is directed and urged to return to the original angle by the impact resilience.

[0007]

By fitting and setting the unit container on the pedestal, the projection attached to the liquid introduction pipe or the liquid discharge pipe or the upper end of the pipe pushes up the closing valve, and as a result, it is elastically deformed and the closing valve is opened to filter. At the same time that the flow path is formed and the unit container is removed, the projection or the upper end of the pipe is removed, so that the original state is restored, and the stop valve is closed to seal the container.

[0008]

1 is a view showing the concept of a double structure filter container, and FIG. 2 is a longitudinal sectional view showing an embodiment of a double structure filter container sheath. The sheath 1 is divided into a pedestal 2 and a cap 3, both of which are integrated by a flange 4, a screw or other coupling means. Liquid introduction pipe 5 on the base 2
And a liquid discharge pipe 6 are provided, and the outer sides of both pipe ends are directly connected to a liquid purification process line (not shown). The cap 3 needs to have a structure and strength for supporting the unit container inside and preventing deformation and damage due to internal pressure, and it is preferable that the cap 3 has a metal integrated structure.

FIG. 3 is a vertical sectional view showing the unit container, in which one cartridge filter 8 is housed in the body 7 and fitted into the liquid introduction pipe 5 and the liquid discharge pipe 6 of the pedestal 2, respectively. A liquid inlet 9 and a liquid outlet 10 are provided, and O-rings 11 and 12 are arranged at their joints to prevent liquid leakage. Liquid inlet 9 and liquid outlet 10
Each is equipped with a shutoff valve 13 and a shutoff valve 14.

FIG. 5 shows an example of the shapes of the shutoff valves 13 to 14 of the present invention. In FIG. 3, shut-off valves 13 and 1
4 is a shoulder portion 17 of the liquid inlet 9 or the liquid outlet 10.
Alternatively, a plurality of legs 19 are supported by 18 or so as to close the hole, and a plurality of legs 19 are attached at a constant angle around the disc-shaped valve body. The leg 19 is oriented and urged to return to its original angle by repulsive elasticity when the valve body is pushed up and opened, and slides along a guide 27 attached to the bottom end cap 21. To do. On the other hand, the upper ends of the liquid introduction pipe 5 and the liquid discharge pipe 6 on the pedestal side have a saw blade shape or a gear shape, and the unit container 28 is fitted and set on the pedestal 2 and the top portion of the saw blade is closed by the stop valve 13. When the pressures of 14 and 14 are pushed up, as shown in FIG. 4, the liquid comes to flow through the recess at the upper end of the liquid introduction pipe or the liquid discharge pipe. When the unit container 28 is removed from the pedestal 2, the opening of the leg 19 returns to the original angle by pulling out the liquid introduction pipe 5 and the liquid discharge pipe 6 from the liquid introduction port 9 and the liquid discharge port 10, respectively, and the liquid introduction port 9 And the liquid outlet 10 is closed. The number of legs 19 may be three or more, and the guide 27 may be provided according to the number of legs. The means for expressing the direction of the shutoff valve and the repulsive force are not particularly limited, but it is preferable to use a plastic molded product in consideration of disposal and incineration.

When the removed unit container 28 is transported, a foldable handle (not shown) provided on the upper portion of the body 7 with the liquid introduction port and the liquid discharge port facing downward with the residual liquid inside. Even if it is hung by, since the weight of the residual liquid acts to strengthen the sealing of the valve in addition to the spring action of the shutoff valve, the surroundings will not be contaminated due to liquid leakage.

The cartridge filter 8 is set inside the unit container 28, and the liquid that has entered through the liquid introduction pipe 5 and the liquid introduction port 9 is guided to the outside of the cartridge filter 8 and is press-fitted into the filter. Purified in the process of exiting inside. Therefore, it is necessary to have a structure that prevents the liquid on the outer side from short-circuiting from the end face of the filter and flowing inward. In the present invention, the upper and lower ends of the filter are the upper end cap 2
0 and the bottom end cap 21 are sandwiched and pressed through the cushion material 24, and ring-shaped projections 22 and 23 are provided on each end cap to prevent liquid short circuit.

The unit container 28 is to be disposable, and an injection molded product such as PE or PP is used, but the sheath 1 is allowed to maintain the shape and strength against internal pressure. Therefore, the sheath 1 is made of a metal pressure resistant structure.

In order to mount the unit container 28 on the pedestal 2, it is positioned so that the liquid introducing pipe 5 and the liquid discharging pipe are fitted and pressed against the liquid introducing port 9 and the liquid discharging port 10, respectively, so as not to float. Through the cushion material through the cap 3
Insert and fix. For fixing, it is necessary to fix it by a reliable method such as screwing or using a flange or a clamp. Only after the fixation is completed, it becomes ready for use, the valve of the line is opened to introduce the liquid, and the filtration work is started.
When replacing the filter, first stop the flow of the line, return the liquid to the line with an air blower if necessary, remove the cap from the pedestal, and then grasp the unit container with the lateral groove 26 provided in the body of the body 7. Alternatively, it can be removed by lifting it up with a folding handle provided on the top of the body. After that, attach a new unit container and restart the operation by the same procedure. The used unit container is discarded, but if the liquid is expensive, the stopper 25 of the small hole for liquid draining opened on the top of the body 7 is pushed open from the outside, and the liquid is collected from the liquid inlet on the pan. You can also do it.

Since the disposable filter container is a consumable item, it is necessary to prepare a spare part. However, since the diameter and the number of cartridge filters differ depending on the filtration conditions, it is necessary to prepare a large number of cartridge filters. The unit container of the present invention has a structure in which the end cap that holds the filter can be separated, and by changing the end cap, the purpose of filtration can be changed.
For example, only the end caps are different between the one that accommodates one cartridge filter with a large diameter and the one that accommodates three standard cartridge filters with a small diameter, and all other members may be common. Therefore, it is possible to reduce the types of spare parts.

[0016]

As described above, the shut-off valve for connecting a double structure filter container according to the present invention is small and lightweight, does not occupy a lot of space, has a simple structure, and does not have a risk of malfunction. Since it is possible, it is suitable for use in a disposable unit container. Furthermore, since all the members of the unit container can be molded into plastics, they can be easily incinerated or discarded.

[Brief description of drawings]

FIG. 1 is a diagram showing the concept of a dual structure filter container.

FIG. 2 is a vertical sectional view showing a sheath portion.

FIG. 3 is a vertical cross-sectional view showing a unit container.

FIG. 4 is a vertical cross-sectional view of the assembled dual structure filter container.

FIG. 5 is a perspective view showing an embodiment of the stop valve of the present invention.

[Explanation of symbols]

 1 sheath 2 pedestal 3 cap 4 flange 5 liquid inlet pipe 6 liquid outlet pipe 7 body 8 cartridge filter 9 liquid inlet 10 liquid outlet 11 O-ring 12 O-ring 13 stop valve 14 stop valve 17 shoulder 18 shoulder 19 leg 20 Upper End Cap 21 Bottom End Cap 22 Ring-shaped Protrusion 23 Ring-shaped Protrusion 24 Cushion Material 25 Plug 26 Side Groove 27 Guide 28 Unit Container

 ─────────────────────────────────────────────────── ───Continued from the front page (56) Bibliography Sho 58-195606 (JP, U) Jikkouhei 2-44238 (JP, Y2)

Claims (1)

(57) [Claims] 1. A sheath and a unit container housed therein, wherein the unit container contains a predetermined cartridge filter and is fitted into a liquid introduction pipe and a liquid discharge pipe provided on a pedestal of the sheath, respectively. It has a liquid inlet and a liquid outlet that can be combined, and each of the liquid inlet and the liquid outlet is provided with a closing valve, and the unit container is fitted on the pedestal to set the flow. The road is open,
In a double structure filter container that is closed at the same time when the unit container is removed from the pedestal, the stop valve is made of a plastic molded body, and a plurality of legs are attached at a constant angle around a disc-shaped valve body, When the valve body is pushed up and opened, the leg is directed and urged so as to return to the original angle by repulsive elasticity. .