Candle wick type melt filtering device

Abstract

The utility model relates to a candlewick type melt filtering device which comprises a filtering chamber, a feeding pipe, a discharging pipe and a slag discharging pipe, each filter in the filter chamber is in threaded connection with the lower part of the hollow material collecting disc and is communicated with the interior of a cavity of the material collecting disc; the filter comprises a central perforated filter element, a flexible metal filter screen and a hoop framework, the outer side of the perforated filter element is sleeved with the flexible metal filter screen, the flexible metal filter screen is sleeved with the hoop framework, the flexible metal filter screen is a long-barrel-shaped thin-wall metal net in a natural state, and the thin wall of the metal net extends in a continuous inwards-concave outwards-convex wavy mode in the circumferential direction. The upper and lower ends of the flexible metal filter screen are fixed at the upper and lower ends of the hoop framework, and the middle part of the flexible metal filter screen covers the inner side of the hoop framework. According to the device, on the basis that the filtering effect is improved, a filter cake can be rapidly expanded, cracked and broken, so that the filter cake is rapidly separated from the filter, the filtering effect of the filter is rapidly recovered, the use length of the filter is obviously increased, and the melt efficiency is improved by reducing the replacement frequency of the filter.

Description

Technical Field

[0001] The utility model relates to polymer melt processing equipment and technical fields, in particular to a candle wick type melt filtering device. Background Art

[0002] Melt filter is an important equipment for high-speed spinning and spinning fine denier yarn. It is used for continuous filtration of polymer melts. It improves the spinning performance of the melt and ensures the spinning quality by removing impurities and unmelted particles in the melt. The candle wick melt filter is composed of a tubular porous filter element wrapped with a high-temperature resistant filter cloth. When used for melt circulation filtration, the filter cake outside the filter cloth reaches a certain thickness. If the temperature is not properly controlled, high-pressure backwashing will not make it easy to quickly separate from the filter cloth and break it for discharge, resulting in a gradual decrease in filtration efficiency and frequent replacement of the filter element. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a candle wick type melt filtering device, which can quickly expand and break the filter cake to quickly separate it from the filter through structural design of the filter, thereby improving the filtering effect of the filter and significantly improving the service life of the filter, thereby improving the efficiency of the melt by reducing the number of times the filter is replaced.

[0004] The candle wick type melt filtering device comprises at least two filter chambers, a feed pipe for inputting raw material melt, a discharge pipe for outputting filtered melt, and a slag discharge pipe for beating out filter residue; the feed pipe is connected with each filter chamber via a diverter valve, each filter chamber is connected with the slag discharge pipe via a confluence valve, each filter chamber is provided with a collecting tray and a plurality of filters mounted on the collecting tray, and the filter is connected with the discharge pipe via the collecting tray; wherein each filter in the filter chamber is threadedly connected below the hollow collecting tray and is connected with the collecting tray cavity; the filter comprises a central perforated filter element, a flexible metal filter screen wrapped around the outside of the perforated filter element, and a hoop frame wrapped around the outside of the flexible metal filter screen, wherein the flexible metal filter screen is a long cylindrical thin-walled metal mesh in a natural state, and the thin wall of the metal mesh extends in a continuous inwardly concave and outwardly convex wavy shape in the circumferential direction, and the upper and lower ends of the flexible metal filter screen are fixed at the upper and lower ends of the hoop frame, and the middle part of the flexible metal filter screen is covered on the inner side of the hoop frame.

[0005] Furthermore, the hoop frame includes an upper fixing frame and a lower fixing frame extending outward from the outer wall of the perforated filter element, cage reinforcements connected between the upper fixing frame and the lower fixing frame, and hoops fixed on the cage reinforcements in sequence from top to bottom.

[0006] Furthermore, the upper part of the perforated filter element is provided with a thread portion for threaded connection to the thread hole at the bottom of the collecting tray, the upper part of the perforated filter element is provided with a longitudinal row of through holes at the lower part, and the position of the through holes on the perforated filter element is opposite to the concave area of ​​the flexible metal filter screen.

[0007] Furthermore, a circulation pipe connected to the feed pipe is provided upstream of the end of the discharge pipe, and a discharge control wheel valve is provided at the end of the discharge pipe and on the circulation pipe respectively.

[0008] Specifically, the diverter valve is provided with a plurality of diverter hand wheels for controlling the feed into the corresponding filter chambers.

[0009] Specifically, the confluence valve is provided with a total discharge hand wheel for controlling the discharge of slag from the slag discharge pipe.

[0010] The utility model discloses a candle wick type melt filtering device, which improves the filtering effect by structural design of the filter, can quickly expand and break the filter cake to make it quickly separate from the filter, thereby quickly restoring the filtering effect of the filter, and significantly improving the service life of the filter, thereby improving the efficiency of the melt by reducing the number of times the filter is replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The following is a further description of a candle wick type melt filter device of the utility model in conjunction with the accompanying drawings:

[0012] Figure 1 Schematic diagram of the plane structure of the candle wick type melt filter device (the dotted line part is a perspective structure);

[0013] Figure 2 yes Figure 1 AA-direction local cross-section diagram;

[0014] Figure 3 yes Figure 2 A partial enlarged view of the B area;

[0015] Figure 4 It is a structural schematic diagram of the filter described in the candle wick type melt filtering device.

[0016] In the figure:

[0017] 1-filter chamber, 2-feed pipe, 3-discharge pipe, 4-slag discharge pipe, 5-diverter valve, 6-merging valve;

[0018] 11-collecting tray, 12-filter, 31-circulation pipe, 32-discharge control wheel valve, 51-inlet hand wheel, 61-discharge hand wheel;

[0019] 121-perforated filter element, 122-flexible metal filter screen, 123-hoop frame;

[0020] 1211-wire portion, 1212-through hole, 1231-upper fixing frame, 1232-lower fixing frame, 1233-cage reinforcement, 1234-hoop. DETAILED DESCRIPTION

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] The technical solution of the utility model is further described below with specific embodiments, but the protection scope of the utility model is not limited to the following embodiments.

[0024] Implementation method 1: Figures 1 to 4 As shown, the candle wick type melt filtering device comprises at least two filter chambers 1, a feed pipe 2 for inputting raw material melt, a discharge pipe 3 for outputting filtered melt, and a slag discharge pipe 4 for beating out filter residue; the feed pipe 2 is connected with each filter chamber 1 through a diverter valve 5, and each filter chamber 1 is connected with the slag discharge pipe 4 through a confluence valve 6, and each filter chamber 1 is provided with a collecting tray 11 and a plurality of filters 12 installed on the collecting tray 11, and the filters 12 are connected with the discharge pipe 3 through the collecting tray 11; wherein, each filter 12 in the filter chamber 1 is threadedly connected to the bottom of the hollow collecting tray 11 The filter 12 comprises a central porous filter element 121, a flexible metal filter screen 122 wrapped around the outside of the porous filter element 121, and a hoop frame 123 wrapped around the outside of the flexible metal filter screen 122. The flexible metal filter screen 122 is a long cylindrical thin-walled metal mesh in a natural state, and the thin wall of the metal mesh extends in a continuous inwardly concave and outwardly convex wavy shape in the circumferential direction. The upper and lower ends of the flexible metal filter screen 122 are fixed to the upper and lower ends of the hoop frame 123, and the middle part of the flexible metal filter screen 122 is covered on the inner side of the hoop frame 123.

[0025] Embodiment 2: The hoop skeleton 123 of the candle wick type melt filter device includes an upper fixed frame 1231 and a lower fixed frame 1232 formed by extending outward from the outer wall of the perforated filter element 121, a cage rib 1233 connected between the upper fixed frame 1231 and the lower fixed frame 1232, and a hoop 1234 fixed on the cage rib 1233 from top to bottom. While supporting the perforated filter element and the flexible metal filter screen, the filter cake attached to the outer wall of the flexible metal filter screen is broken during the backblowing process so that it can quickly detach from the outer wall of the metal screen. The upper part of the perforated filter element 121 is provided with a thread portion 1211 for threading the thread hole at the bottom of the collecting plate 11, and the upper part of the perforated filter element 121 is provided with a through hole 1212 with a vertical row at the lower part, and the position of the through hole 1212 on the perforated filter element 121 is opposite to the concave area of ​​the flexible metal filter screen 122. It is used to compress the concave position of the flexible metal mesh to a certain extent when back-blowing, thereby causing the overall deformation of the flexible metal mesh to tear the filter cake attached to the outer wall. A circulation pipe 31 connected to the feed pipe 2 is provided upstream of the end of the discharge pipe 3, and a discharge control wheel valve 32 is provided at the end of the discharge pipe 3 and on the circulation pipe 31. It is used to switch the circulation filtration and the melt discharge after filtration. The remaining structures and components are as described in Embodiment 1 and will not be described again.

[0026] Embodiment 3: The candle wick type melt filter device is provided with a plurality of feed hand wheels 51 for controlling the feeding of the corresponding filter chamber 1 on the diverter valve 5. The converging valve 6 is provided with a total discharge hand wheel 61 for controlling the discharge of slag from the slag discharge pipe. The remaining structures and components are as described in Embodiment 1 and will not be described again.

[0027] During operation: the raw material melt is fed into the filter chamber through the feed pipe, heated in the filter chamber, and then flows into the cavity of the collecting plate through the flexible metal filter screen and the perforated filter element in turn, and then is sent to the discharge pipe after being concentrated, and then flows into the filter chamber through the circulation pipe, and is discharged from the discharge pipe after several cycles. During this period, the wavy flexible metal filter screen increases the contact area of ​​the filter material and improves the filtering effect. It can produce overall deformation during backblowing, causing the filter cake attached to the mesh surface to expand and crack quickly, and then it is quickly broken after being collided by the hoop skeleton on the outside, which is convenient for precipitation and discharge.

[0028] The candle wick type melt filter device improves the filtering effect by structurally designing the filter. It can also quickly expand and break the filter cake so that it can quickly separate from the filter, thereby quickly restoring the filtering effect of the filter and significantly increasing the service life of the filter. The efficiency of the melt is improved by reducing the number of times the filter is replaced.

[0029] The above description shows the main features, basic principles, and advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments or embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, the above embodiments or embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A candle wick type melt filter device, characterized in that: The invention comprises at least two filter chambers (1), a feed pipe (2) for inputting raw material melt, a discharge pipe (3) for outputting filtered melt, and a slag discharge pipe (4) for discharging filter residue; the feed pipe (2) is connected to each filter chamber (1) via a diverter valve (5), each filter chamber (1) is connected to the slag discharge pipe (4) via a confluence valve (6), each filter chamber (1) is provided with a collecting plate (11) and a plurality of filters (12) mounted on the collecting plate (11), and the filters (12) are connected to the discharge pipe (3) via the collecting plate (11); wherein each filter (12) in the filter chamber (1) is threadedly connected to the bottom of the hollow collecting plate (11) and is connected to the cavity of the collecting plate (11); The filter (12) comprises a central perforated filter element (121), a flexible metal filter screen (122) wrapped around the outside of the perforated filter element (121), and a hoop frame (123) wrapped around the outside of the flexible metal filter screen (122); the flexible metal filter screen (122) is a long cylindrical thin-walled metal mesh in a natural state, and the thin wall of the metal mesh extends in a continuous inwardly concave and outwardly convex wave shape in the circumferential direction; the upper and lower ends of the flexible metal filter screen (122) are fixed to the upper and lower ends of the hoop frame (123), and the middle part of the flexible metal filter screen (122) is covered on the inner side of the hoop frame (123).

2. The candle wick type melt filter device according to claim 1, characterized in that: The hoop skeleton (123) comprises an upper fixing frame (1231) and a lower fixing frame (1232) formed by extending outward from the outer wall of the perforated filter element (121), a cage rib (1233) connected between the upper fixing frame (1231) and the lower fixing frame (1232), and a hoop (1234) fixed on the cage rib (1233) in sequence from top to bottom.

3. The candle wick type melt filter device according to claim 2 is characterized in that: The upper portion of the perforated filter element (121) is provided with a thread portion (1211) for threaded connection with the thread hole at the bottom of the collecting plate (11); the upper portion of the perforated filter element (121) is provided with through holes (1212) arranged in a longitudinal row at the lower portion; the positions of the through holes (1212) on the perforated filter element (121) are directly opposite to the concave area of ​​the flexible metal filter screen (122).

4. The candle wick type melt filter device according to claim 1 is characterized in that: A circulation pipe (31) connected to the feed pipe (2) is provided upstream of the end of the discharge pipe (3), and a discharge control wheel valve (32) is provided at the end of the discharge pipe (3) and on the circulation pipe (31), respectively.

5. The candle wick type melt filter device according to claim 1, characterized in that: The diverter valve (5) is provided with a plurality of diverter hand wheels (51) for controlling the feeding of materials into the corresponding filter chambers (1).

6. The candle wick type melt filter device according to claim 1, characterized in that: The confluence valve (6) is provided with a total discharge hand wheel (61) for controlling the discharge of slag from the slag discharge pipe.

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