JPH0222010Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a filter device for removing impurities from a high viscosity fluid such as a polymer. The present invention relates to the structure of a filter container for high viscosity fluid that allows high viscosity fluid to pass therethrough.

A conventional example of this type of filter device will be explained with reference to FIGS. 5 and 6. The filter element 1 is composed of a perforated plate structure formed in the shape of a hollow disk. A plurality of filter elements are stacked in the axial direction and housed in the container 2, and a hollow shaft called a center pole 3 is provided at the center of each filter element. Both ends of filter elements arranged and stacked are closed with end plates 4 and 5. The fluid to be filtered is
As shown by the arrows in the figure, the water flows from the inner periphery of the container 2 through each filter element 1 to the center, is collected in the center hollow part of the center pole 3, and is taken out from one shaft end. In this case, each filter element 1 is in close contact with one another in its center, so that from this contact area the fluid can flow directly to the center pole 3.
A seal portion 6 is formed to prevent it from entering inside. The peripheral parts of the filter elements 1 are not in contact with each other in a free state, so the end plates 4 and 5 that press the stacked filter elements in the axial direction are configured to tighten only the central part of the endmost element. It's summery. Here, the conventional filter element 1 has an internal radial through hole 7 into which fluid can enter from the outer periphery or outer surface of the element. Therefore, a high viscosity fluid such as a polymer remains in the inlet of the filter element, making it impossible to completely wash away the deteriorated substances, resulting in a disadvantage that the life of the filter element itself is short.

In order to solve these problems, filter elements using sintered bodies of metal or ceramic have been developed. This sintered filter element has high uniformity in opening and high porosity, does not cause polymer stagnation unlike conventional filter elements, and has particularly excellent ability to trap foreign matter in the polymer and filtration effect. The present invention provides a filter device for high viscosity fluid using this filter element made of a sintered body, and more specifically, a structure of a filter container for a polymer that can effectively exhibit the effects of the filter element made of a sintered body. The purpose is to provide the following.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a filter device according to an embodiment of the present invention. At both ends of the container body 10, end plates 11 and 12 having a fluid passage in the center are provided with bolts 13,
14, one end plate (upper side)
A hollow center pole 18 extending into the container body 10 is fixed to the center of the container body 12 . A hollow disc-shaped sintered filter element 2 is provided between the outer periphery of the center pole 18 and the inner periphery of the container body 10.
A plurality of 0's are stacked and stored. As shown in an enlarged view in FIG.
1, 22 are provided, and the retaining rings 21, 22
, the retaining rings adjacent to each other are in close contact, and this contact surface forms a sealing surface 23, 2.
It has become 4. Outer and inner retaining rings 2
1 and 22 are formed with small holes (indicated by broken lines in the figure) for fluid passage at alternate positions.

A threaded portion is formed at the other end of the center pole 18, and a female threaded portion is also formed on the inner peripheral surface of one end of the container body 10. In the embodiment shown, one end of the stacked filter elements contacts the inner surface of one end plate 12 of the container body 10 at the retaining ring, while the other end of the filter elements has a thin plate. A shaped hollow presser plate 26 is installed, and its central portion is tightened by a cap nut 17 screwed onto the threaded end of the center pole 18. Further, the filter element and the peripheral portion of the presser plate 26 are tightened by a tightening ring 15 screwed onto the female threaded portion of the container body 10 via a passage ring 16 which will be described later. In this way, the center and peripheral parts of the plurality of filter elements are independently pressed in the axial direction through the thin, low-rigidity holding plate 26, and the retaining rings 21, 22 (the The sealing surfaces 23 and 24 (FIG. 2) shown in FIG. 2 are brought into close contact with each other by this pressing force, and a reliable seal is achieved.

FIG. 3 is a partial perspective view of the channel ring 16 described above, and FIG. 4 a shows the channel ring 16 and the container body 1.
0 is a partial cross-sectional view showing a state of engagement with 0,
FIGS. 4b and 4c are a sectional view taken along the line AA and BB of FIG. 4a, respectively. Channel ring 16
is formed with a plurality of notch grooves 16a on its periphery,
Further, a protrusion 16b is formed in a portion. This protrusion 16b creates a gap between the cutout groove 16a and the inner circumferential wall of the container body 10, and the fluid flowing in from the center hole of one end plate (lower side) 11 passes through this gap and the groove to the filter. The fluid enters the filter element through the small hole in the retaining ring 22 on the outer circumferential side of the element 20, and after being subjected to a filtration action, passes through the small hole in the retaining ring 21 on the inner circumferential side to the center hole of the center pole 18 and the center pole. 18 and the inner periphery of the filter element, rises, and is taken out from the hole in the other end plate 12. This fluid flow is indicated by arrows in FIGS. 1, 2, and 3. In addition, in FIG. 1, 19 is the main body 10.
and a sealing gasket interposed between the end plates 11 and 12, and 25 is an electric or heat medium type heater disposed outside the container body.

Comparing the conventional structure and the structure of the present invention in terms of the stacking direction of the filter elements, the conventional structure only tightens the center pole, but the present invention tightens the filter elements around the center pole in addition to the center of the element. The peripheral portion of the filter element can also be pressed and tightened while being independently adjusted by the inner circumferential wall of the container body, the end plate, and the tightening ring. Since the tightening mechanism and the container end plate are separate, the distance between the inlet and outlet piping flanges can be kept constant.
Even when the number of filter elements decreases, the filters can be set regardless of the number of filters by simply inserting a spacer of the same size as the element, and dimensional errors of a large number of stacked filters can be absorbed. The container is constructed with bolts attached at both ends, making it easy to clean the container, and the fluid flow also eliminates dead areas. By replacing the filter holding plate with a thick plate, conventional filters can also be used. Various advantages are brought about.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a filter container according to an embodiment of the present invention, FIG. 2 is a partially enlarged vertical cross-sectional view of a filter portion according to the present invention, and FIG. 3 is a portion of a channel ring according to the present invention. FIG. 4a is a partial cross-sectional view of the channel ring portion, FIG. 4b is a cross-sectional view taken along line A-A in FIG. 4a, and FIG. 4c is a cross-sectional view taken along line A-A in FIG. -B sectional view, FIG. 5 is a partially cut side view of a conventional filter device, and FIG. 6 is a partially cut side sectional view of a filter element incorporated in the conventional filter device. 10... Container body, 11, 12... End plate, 15
... Tightening ring, 16 ... Channel ring, 17 ...
Cap nut, 18... Center pole, 20... Filter element, 21, 22... Retaining ring, 2
3, 24... Seal surface, 26... Presser plate.

Claims (1)

[Scope of utility model registration request] In a filter device for high viscosity fluid in which a plurality of sintered filter elements are stacked around the outer periphery of a hollow center pole and housed in a container body, a tightening nut is screwed onto the end of the hollow center pole, and a tightening nut is screwed onto the end of the hollow center pole. A tightening ring is screwed onto the inner periphery of the end of the main body, and by tightening the nut and the ring, the center and peripheral portions of the sintered filter element are pressed in the axial direction and sealed. Filter device for high viscosity fluid.