CN210079015U - Plate type melt filter - Google Patents

Abstract

The utility model discloses a plate-type melt filter, which comprises a filter body and a sliding plate filter element pushed by a hydraulic cylinder to pass through the middle part of the filter body, wherein a filtering channel in the filter body is divided into a liquid inlet channel and a liquid outlet channel by the sliding plate filter element; an annular groove is formed in the front sealing ring positioned on the inner side or the outer side of the compensating spring, and an elastic metal sealing ring is installed in the annular groove. The utility model discloses the advantage is in simple structure, and the simple installation improves plate-type fuse-element filter's high temperature, high pressure tolerance, enlarges the range of application, and the effectual clearance department water clock problem of solving filter body and preceding sealing ring improves the qualification rate of product, improves production efficiency, reduces the energy consumption.

Description

Plate type melt filter

Technical Field

The utility model belongs to the technical field of polymer fuse-element filters and specifically relates to a can stop board-like fuse-element filter of hourglass material under high temperature, the high pressure operating mode basically.

Background

The melted plastic products (such as plastic pipes, plastic films, nylon, chemical fibers, etc.) are collectively called polymer melts, and the polymer melts are filtered by a plate-type melt filter, so that impurities in the materials are separated. There are two types of plate-type melt filters commonly available on the market: one is a single-column or double-column type screen changer, and the other is a screen changer sealed by a sealing ring; the single-column and double-column type screen changers have the defects of high manufacturing cost, high processing difficulty and long processing period; and its feed liquor side of the net changer that seals up through the sealing ring is clearance seal, and the sealing ring that slides the laminating with slide filter core feed liquor side promptly is the clearance and installs in the filter main part of inlet channel exit, and the clearance seal can lead to high temperature, high pressure during operation clearance department to appear leaking the phenomenon, and then causes equipment to appear the water clock problem in process of production, influences the qualification rate of relevant goods. In order to solve the problem of water leakage, a copper ring or a tetrafluoride ring is adopted as a sealing ring for sealing at present, and although the leakage problem of a gap sealing part can be improved, the high temperature resistance and the high pressure resistance of the copper ring or the tetrafluoride ring are limited, so that the fault rate is very high, and the service life is very short.

Disclosure of Invention

An object of the utility model is to provide a simple structure, installation and use simple and convenient board-like fuse-element filter.

In order to achieve the above purpose, the utility model can adopt the following technical proposal:

the plate-type melt filter comprises a filter body and a sliding plate filter element pushed by a hydraulic cylinder to pass through the middle of the filter body, wherein a filtering channel in the filter body is divided into a liquid inlet channel and a liquid outlet channel by the sliding plate filter element, a front sealing ring in sliding fit with the liquid inlet side of the sliding plate filter element is installed on the liquid inlet channel, a rear sealing ring in sliding fit with the liquid outlet side of the sliding plate filter element is installed on the liquid outlet channel, and the front sealing ring is installed on the filter body at the outlet of the liquid inlet channel through a compensation spring gap; and an annular groove is formed in the front sealing ring and positioned on the inner side or the outer side of the compensating spring, and an elastic metal sealing ring is arranged in the annular groove.

The utility model has the advantages of simple structure and simple installation. The gap between the filter body and the front sealing ring is sealed by the elastic metal sealing ring, so that the front sealing ring can be arranged on the filter body at the outlet of the liquid inlet channel through the gap of the compensating spring, the front sealing ring can be always attached to the liquid inlet side of the sliding plate filter core, the high-temperature and high-pressure tolerance of the plate type melt filter is improved, the application range of the plate type melt filter is expanded, and the plate type melt filter can be used for producing high-end cast films; in addition, the elastic metal sealing ring also effectively solves the problem of water leakage at the gap between the filter body and the front sealing ring, improves the qualification rate of products, improves the production efficiency and reduces the energy consumption.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Detailed Description

As shown in fig. 1, the plate-type melt filter of the present invention comprises a filter body 1 and a sliding plate filter element 3 pushed by a hydraulic cylinder 2 to pass through the middle of the filter body 1, wherein the sliding plate filter element 3 is composed of a sliding plate made of special steel and a pair of filter elements arranged on the sliding plate side by side at intervals, penetrates from one side of the filter body 1 to the other side and penetrates out, a filtering channel in the filter body 1 is divided into a liquid inlet channel 4 and a liquid outlet channel 5, and the liquid inlet channel 4 and the liquid outlet channel 5 are communicated through the filter elements; the distance between the two filter cores ensures that when one filter core is in a working position (namely, at the position of communicating the liquid inlet channel 4 and the liquid outlet channel 5), the other filter core is positioned outside the filter body 1.

In order to ensure the sealing between the sliding plate filter element 3 and the liquid inlet and outlet channels 4 and 5, a front sealing ring 6 which is in sliding fit with the liquid inlet side of the sliding plate filter element 3 is arranged on the liquid inlet channel 4, and the size of the inner cavity of the front sealing ring 6 is matched with the liquid outlet end of the liquid inlet channel 4 and the front side surface of a filter element on the sliding plate filter element 3; a rear sealing ring 7 which is in sliding fit with the liquid outlet side of the sliding plate filter element 3 is arranged on the liquid outlet channel 5, and the size of the inner cavity of the rear sealing ring 7 is matched with the liquid inlet end of the liquid outlet channel 5 and the rear side face of the filter element on the sliding plate filter element 3.

In order to ensure that the front sealing ring 6 is always in sealing fit with the sliding plate filter element 3 in the long-time use process, as shown in fig. 1 and 2, the front sealing ring 6 is arranged on the filter body 1 at the outlet of the liquid inlet channel 4 through a compensation spring 8; in order to enhance the sealing performance of the plate-type melt filter and prevent liquid leakage at a gap between the front sealing ring 6 and the filter body 1, a ring groove 9 is formed in the front sealing ring 6 positioned on the outer side of the compensating spring 8, and the ring groove 9 can also be formed in the front sealing ring 6 positioned on the inner side of the compensating spring 8; install high temperature resistant, highly compressed elastic metal sealing ring 10 (for example LH100 type stainless steel sealing ring of south Tonghai Rui sealing technology limited company production) in the annular 9, sealed the clearance between preceding sealing ring 6 and the filter body 1 through elastic metal sealing ring 10, avoid appearing the drippage phenomenon.

During the in-service use, only need with this filter snap-on in the extruder exit, ensure the sealed intercommunication of liquid inlet end and the extruder exit of inlet channel 4 in the filter body 1, later alright carry out the filtration of polymer fuse-element. In the filtering process, when one of them filter core that is in the work position on the slide filter core 3 blocks up, start the quick push of pneumatic cylinder 2 or pull slide filter core 3, make be in the work position that enters into filter body 1 of the filter core of treating the work position on, the filter core of crossing of jam then can remove to the outside from filter body 1 simultaneously, accomplishes to blockking up under the circumstances of not shutting down and crosses the filter core and clear up or change.

Claims (1)

1. The utility model provides a plate-type melt filter, includes filter body (1) and promotes by pneumatic cylinder (2) certainly slide filter core (3) that filter body (1) middle part passed, slide filter core (3) will filtering channel in filter body (1) is cut apart into inlet channel (4) and liquid outlet channel (5) install on inlet channel (4) with the preceding sealing ring (6) of the liquid inlet side sliding fit of slide filter core (3), install on liquid outlet channel (5) with the back sealing ring (7) of the liquid outlet side sliding fit of slide filter core (3), preceding sealing ring (6) are installed on filter body (1) in inlet channel (4) exit through compensating spring (8) clearance; the method is characterized in that: and the front sealing ring (6) is provided with a ring groove (9) which is positioned on the inner side or the outer side of the compensating spring (8), and an elastic metal sealing ring (10) is arranged in the ring groove (9).

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