JPH0213053Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a filter used for separating liquids and solids, and more specifically relates to a cartridge type filter.

Prior art and its problems Conventionally, filters in which a so-called cartridge filter is housed in a housing have been used in various fields because of their simple structure and ease of handling, and various proposals have been made regarding the structure. By the way, when filtering organic solvents, high viscosity liquids, high concentration sludge, etc., when replacing the filter element or removing sediment that has accumulated inside the housing, there is a risk of contamination of the working environment such as the generation of a bad odor or dripping of liquid. There have been problems such as the occurrence of liquid leakage and the intrusion of liquid into the contact surface between the housing and the filtration element, making it difficult to remove the filtration element due to the liquid sticking phenomenon.

Means for Solving Problems As a result of intensive studies to solve the above-mentioned problems of so-called cartridge filters, the inventors of the present invention have found that in a filter consisting of a filter body 1 and a housing 2 that houses the same, the filter element 3 is It is a liquid shielding plate having a diameter larger than the diameter and slightly smaller than the inner diameter of the housing 2, and has an attachment/detachment jig engagement part 5 in the center and a gap 10 between the filtration element 3 and the resin cylinder 9 in the peripheral part. Upper liquid shielding plate 8 having a communicating liquid passage port 4
A lower liquid shielding plate 7 having a liquid drain port 6 in the center is attached to the upper and lower ends of the filtration element 3, respectively, and a resin tube 9 attached to the outer edge of both liquid shielding plates is attached to the filtration element 3. The desired purpose was achieved by using the filter body 1, which houses the filter body 1, in such a manner that its upper end is in close contact with the entire circumference of the inner wall of the housing.

The present invention will be explained below with reference to the accompanying drawings. 1st
The figure is a sectional view showing an example of an embodiment of the present invention. In the figure, a housing 2 that accommodates a filter 1 is comprised of an upper lid 11 having a raw solution inlet, a lower lid 12 having a filtrate inlet, and a body 13, but the lower lid and the body can also be formed integrally. In addition, both the raw liquid inlet and the filtrate inlet are of a communicating tube type so that many filters can be connected in parallel.
It can also be a stand-alone type.

The filter body 1 consists of an upper liquid shield plate 8, a filter element 3, a lower liquid shield plate 7, and a resin cylinder 9, and is integrally molded. The upper liquid shielding plate 8, which has the attachment/detachment jig engagement part 5 in its center, has a diameter larger than the outer diameter of the filtration element 3, and the filtration element 3 and resin It has a liquid passage port 4 that communicates with the gap 10 between the tubes 9, and is bonded to the upper end of the filtration element 3. The lower liquid shielding plate 7 has a diameter larger than the outer diameter of the filtration element 3, has a drain port 6 in its center having a diameter smaller than the inner diameter of the filtration element, and is bonded to the lower end of the filtration element 3. . The resin cylinder 9 is bonded to the entire outer periphery of the upper liquid shielding plate 8 and the lower liquid shielding plate 7, and forms a gap 10 between the resin cylinder 9 and the filtration element 3. These upper liquid shielding plate 8 and lower liquid shielding plate 7
Both the resin cylinder and the resin cylinder are made of a material that does not allow the liquid to be filtered to pass therethrough.

The filter element 3 can be made of any conventionally known material such as porous ceramic, sintered metal, foamed plastic, fiber aggregate, etc., and can be appropriately selected and used.

The filter body 1 configured in this way needs to have an outer diameter smaller than the inner diameter of the housing 2 in order to be able to be stored in the housing 2, but it is necessary to prevent the resin cylinder 9 from being damaged by the liquid pressure during filtration. It is desirable that the inner diameter of the housing 2 be close to that of the housing 2 in order to maintain the inner diameter of the housing 2. Further, in order to prevent the liquid from entering between the filter body 1 and the housing 2 and causing the liquid to stick, at least the upper end of the filter body 1 needs to be in close contact with the inner wall of the housing 2. This close contact can be achieved by precisely molding the filter body 1, by protruding the resin cylinder 9 above the upper liquid shield plate 8 and bringing it into contact with the housing using hydraulic pressure, or by expanding the resin cylinder by hydraulic pressure. It can be implemented by

In the filter of the present invention, the stock solution enters the gap 10 through the liquid passage port 4, the filtrate that has passed through the filter element 3 is discharged from the drain port 6, and the precipitate remains in the gap 10.

Effects The first effect of this invention is that the contact area with the stock solution inside the housing is small, and the precipitates remain inside the filter, making it unnecessary to clean the inside of the housing when replacing the filter. The point is that the environment will be improved.

The second effect of the present invention is that almost all of the contact parts between the housing and the filter body are dry, so they do not stick together, and the upper liquid shield plate 8
The filter body can be replaced extremely easily and cleanly by using a jig such as a hook bar using the attachment/detachment jig engaging portion 5 provided in the filter.

The third effect of the present invention is that the filtration element 3 has a resin cylinder 9.
Because it is covered with filtration material, there is no contamination of the work environment due to dripping of stock solution or precipitate or waste liquid filtration when replacing the filtration body.

The above-mentioned effects of the present invention are particularly noticeable when the stock solution or precipitate emits a bad odor or contains harmful substances such as an organic solvent, or when it is a highly viscous liquid.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one example of an embodiment of the filter of the present invention. 1: filter body, 2: housing, 3: filtration element,
4: Liquid passage port, 5: Detachment jig engagement part, 6: Liquid drain port,
7: Lower liquid shielding plate, 8: Upper liquid shielding plate, 9: Resin tube,
10: void, 11: upper lid, 12: lower lid, 13: body.

Claims (1)

[Scope of utility model registration request] In a filter consisting of a filter element 1 and a housing 2 that accommodates the filter element, both are liquid shield plates having a diameter larger than the outer diameter of the filter element 3 and slightly smaller than the inner diameter of the housing 2, and a detachable fitting is provided in the center. an upper liquid shielding plate 8 having an engaging portion 5 and a liquid passage port 4 communicating with the gap 10 between the filtration element 3 and the resin tube 9 in the peripheral portion; and a lower liquid shielding plate 8 having a liquid drain port 6 in the center portion. A plate 7 is attached to the upper and lower ends of the filtration element 3, respectively, and a resin tube 9 is attached to the outer edge of both liquid shield plates. A filter characterized by being in close contact with the entire circumference of the inner wall of the housing 2.