A high-viscosity aramid pulp filtering lifting split filter element

Abstract

The utility model discloses a kind of hoisting type split filter element for high sticky aramid pulp filtering, it is related to filtering technical field, including filter element framework, and filter element framework one end is fixedly connected with connecting outer thread, connecting outer thread is rotatably connected in the bottom end of flower plate inside filter, and the end, away from filter element framework screw connection of filter element framework, is provided with filter element framework nut, and the end, close to filter element framework nut of filter element framework, is provided with compression bolt, compression bolt is rotatably connected with filter element filter sleeve and filter element framework nut, and passes through filter element filter sleeve.The utility model is fixed in flower plate by the connecting outer thread setting of filter element framework top, and the split structure of bottom is locked by compression bolt and filter element framework nut, when maintaining, the connection of top and flower plate does not need to be disassembled, only needs to loosen bottom compression bolt, and filter element filter sleeve can be taken down alone, realize the convenient operation of top fixed bottom disassembly filter element filter sleeve, and avoid the interface of flower plate to be completely exposed in air, and the pulp is polluted in maintenance process.

Description

Technical Field

[0001] This utility model relates to the field of filtration technology, and in particular to a suspended split filter element for filtering high-viscosity aramid slurry. Background Technology

[0002] In the spinning process of polymers, filters are often used to remove impurities or gel particles from the slurry in order to improve the spinning performance of the melt or slurry, extend equipment life, increase output, and ensure product quality.

[0003] When cleaning existing split-type filter cartridges, it is often necessary to first remove the top fixing structure, then lift the entire filter cartridge out of the tube sheet, and reseal the tube sheet interface. At the same time, the tube sheet interface will be completely exposed to the air, and after the filter cartridge is removed, the internal cavity of the equipment is unprotected, making it easy for external impurities to fall in, which will cause the slurry to be contaminated during maintenance. In view of this, a lifting-type split-type filter cartridge for high-viscosity aramid slurry filtration is proposed. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of existing filters with split-type filter elements, which often require the removal of the top fixing structure and the entire filter element to be lifted out of the tube sheet for cleaning. The tube sheet interface also needs to be resealed, leaving the tube sheet interface completely exposed to the air. Furthermore, the internal cavity of the equipment is unobstructed after the filter element is removed, making it easy for external impurities to fall in, thus causing the slurry to be contaminated during maintenance. Therefore, this utility model proposes a suspended split-type filter element for high-viscosity aramid slurry filtration.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution: A suspended split filter element for filtering high-viscosity aramid slurry includes a filter element skeleton, a filter element sleeve on the outer wall of the filter element skeleton, and an external thread fixedly connected to one end of the filter element skeleton. The external thread is rotatably connected to the bottom end of the tube sheet inside the filter. A filter element skeleton nut is provided at the end of the filter element skeleton away from the external thread connection, and a clamping bolt is provided at the end of the filter element skeleton near the filter element skeleton nut. The clamping bolt passes through the filter element sleeve and is rotatably connected to the filter element skeleton nut.

[0006] Preferably, the filter element frame includes a frame support rod, and the frame support rod is arranged in a ring on the outermost side of the filter element frame.

[0007] Preferably, the outer wall of the skeleton support rod is provided with filter holes, and the filter holes are located at the end of the skeleton support rod near the connecting external thread.

[0008] Preferably, the outer wall of the filter element / filter sleeve is provided with a protective frame, and the protective frame is coaxially connected to the filter element / filter sleeve.

[0009] Preferably, a PTFE gasket is provided at one end of the filter element / filter sleeve near the clamping bolt, and the PTFE gasket is located between the filter element / filter sleeve and the clamping bolt.

[0010] Preferably, the filter element and filter sleeve are provided with an upper connector and a lower connector at both ends, and the inner walls of the lower connector and the upper connector are provided with a filter element skeleton.

[0011] Preferably, the filter element sleeve has a sealing groove at the end away from the clamping bolt, and a rubber ring is provided inside the sealing groove, with the other side of the rubber ring fitting the external thread.

[0012] Preferably, the outer wall of the filter element / filter sleeve is provided with a corrugated filter screen.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the filter element frame is fixed to the tube sheet by the connecting external thread at the top and locked to the filter element frame nut at the bottom by the clamping bolt. During maintenance, there is no need to disassemble the connection between the top and the tube sheet. The filter element can be removed separately by simply loosening the bottom clamping bolt. This realizes the convenient operation of fixing the filter element at the top and removing the filter element at the bottom. It also avoids the tube sheet interface being completely exposed to the air, which would cause the slurry to be contaminated during maintenance. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the filter element skeleton structure of this utility model; Figure 3 This is a schematic diagram of the filter element / filter sleeve structure of this utility model; The numbers in the diagram are: 1. Filter element frame; 11. Frame support rod; 12. Filter hole; 13. Connecting external thread; 14. Filter element frame nut; 2. Filter element / filter sleeve; 21. Protective frame; 22. Sealing groove; 23. Lower connector of filter sleeve; 24. Corrugated filter screen; 25. Upper connector of filter sleeve; 3. PTFE gasket; 4. Clamping bolt; 5. Rubber ring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] Example: This example provides a suspended split filter element for filtering high-viscosity aramid slurry. See [link to example]. Figure 1-3 Specifically, it includes a filter element frame 1, a filter element sleeve 2 on the outer wall of the filter element frame 1, and a connecting external thread 13 fixedly connected to one end of the filter element frame 1. The connecting external thread 13 is rotatably connected to the bottom end of the tube sheet inside the filter. A filter element frame nut 14 is provided at the end of the filter element frame 1 away from the external thread connection, and a clamping bolt 4 is provided at the end of the filter element frame 1 close to the filter element frame nut 14. The clamping bolt 4 passes through the filter element sleeve 2 and is rotatably connected to the filter element frame nut 14. In this optional embodiment, the filter element frame 1 is fixed to the tube sheet by the external thread 13 at the top and locked to the filter element frame nut 14 at the bottom by the clamping bolt 4. During maintenance, there is no need to disassemble the connection between the top and the tube sheet. The filter element and filter sleeve 2 can be removed separately by simply loosening the bottom clamping bolt 4. This achieves the convenient operation of fixing the filter element and removing the filter element and filter sleeve 2 at the bottom and avoids the tube sheet interface being completely exposed to the air, which would cause the slurry to be contaminated during maintenance. Optionally, the filter element frame 1 includes a frame support rod 11, and the frame support rod 11 is arranged in a ring on the outermost side of the filter element frame 1; In this optional embodiment, the high-viscosity aramid slurry will exert continuous radial extrusion pressure on the filter element and filter sleeve 2 during the filtration process. Especially when the filtration pressure fluctuates or the slurry viscosity increases instantaneously, the filter sleeve is prone to bulging, deformation or even rupture due to uneven stress. The skeleton support rods 11 are distributed in a ring on the outermost side, which is equivalent to forming a ring support frame on the inner side of the filter sleeve. Compared with single or non-ring distributed support rods, the ring structure can evenly distribute the radial pressure to each support rod, avoiding skeleton deformation caused by local stress concentration. Optionally, the outer wall of the skeleton support rod 11 is provided with a filter hole 12, and the filter hole 12 is located at the end of the skeleton support rod 11 near the connecting external thread 13; In this optional embodiment, when the high-viscosity aramid slurry is filtered, after impurities are intercepted by the filter element sleeve 2, the clean slurry will flow upward along the gap between the filter element sleeve 2 and the filter element skeleton 1. The filter holes 12 are set at one end near the outlet, which can accurately capture the upward flowing clean slurry, reduce the residence distance and time of the slurry in the gap, avoid the high-viscosity slurry from settling or agglomerating due to the excessively long flow path, ensure that the filtered slurry is discharged quickly, and improve the overall filtration efficiency. Optionally, a protective frame 21 is provided on the outer wall of the filter element and filter sleeve 2, and the protective frame 21 is coaxially connected to the filter element and filter sleeve 2; In this optional embodiment, the protective frame 21 adopts a ring structure and is coaxially sleeved on the outer wall of the filter sleeve. It can directly bear the lateral impact force when the high viscosity slurry flows, and avoid the filter sleeve from bulging, wrinkling or tearing due to excessive local pressure, so as to ensure that the filter sleeve always maintains a stable filtration shape. Optionally, a PTFE gasket 3 is provided at one end of the filter element / filter sleeve 2 near the clamping bolt 4, and the PTFE gasket 3 is located between the filter element / filter sleeve 2 and the clamping bolt 4. In this optional embodiment, the PTFE gasket has excellent plasticity and can undergo slight deformation under the pre-tightening force of the clamping bolt 4, filling the micro-gap between the end of the filter element and the filter sleeve 2 and the clamping bolt 4, blocking the path of slurry leakage from the top of the filter sleeve. At the same time, the slurry pressure may fluctuate during the filtration process, and the elasticity of the PTFE gasket can buffer the pressure change, avoiding instantaneous leakage caused by a sudden increase in pressure, and ensuring that the sealing effect remains stable under dynamic working conditions. Optionally, the filter element and filter sleeve 2 are provided with an upper connector 25 and a lower connector 23 at both ends, and the inner walls of the lower connector 23 and the upper connector 25 are provided with a filter element skeleton 1. In this optional embodiment, the upper connector 25 and the lower connector 23 of the filter sleeve are usually metal forming structures, with grooves or holes on the inner wall that are adapted to the filter element skeleton 1, so that the two ends of the filter element filter sleeve 2 can be rigidly locked on the filter element skeleton 1, and the filter element filter sleeve 2 can be prevented from axially shifting due to slurry impact or impurity accumulation. Optionally, a sealing groove 22 is provided at the end of the filter element and filter sleeve 2 away from the clamping bolt 4, and a rubber ring 5 is provided inside the sealing groove 22, and the other side of the rubber ring 5 is fitted with the external thread 13. In this optional embodiment, the rubber ring 5 is compressed between the sealing groove 22 and the outer wall of the connecting external thread 13, and the elastic deformation of the rubber fills the annular gap at the connection between the lower connector 23 of the filter sleeve and the filter element skeleton 1, preventing the slurry from seeping in from the radial gap between the filter sleeve and the skeleton, thus completely eliminating the risk of side-filter leakage. Optionally, the outer wall of the filter element and filter sleeve 2 is provided with a corrugated filter screen 24; In this optional embodiment, the concave-convex structure formed by the corrugated filter screen 24 can form a multi-layer interception of the slurry. Larger impurities are first intercepted by the convex surface, and smaller impurities are filtered a second time when they flow to the concave surface with the slurry. Compared with the single-plane interception of the flat filter screen, it can capture gel particles and solid particles of different sizes more efficiently, improving the filtration accuracy. At the same time, the high viscosity slurry will form local turbulence in the concave part of the corrugated filter screen 24. This slight disturbance can reduce the adhesion of impurities on the filter screen surface and prevent the slurry from staying on the filter screen surface for a long time and clumping. Meanwhile, the turbulence effect can accelerate the speed at which the clean slurry penetrates the filter screen, indirectly improving the filtration efficiency.

[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A suspended split filter element for filtering high-viscosity aramid slurry, comprising a filter element skeleton (1), characterized in that: The filter element frame (1) has a filter element sleeve (2) on its outer wall, and one end of the filter element frame (1) is fixedly connected to an external thread (13). The external thread (13) is rotatably connected to the bottom end of the tube sheet inside the filter. The filter element frame (1) is provided with a filter element frame nut (14) at the end away from the external thread connection, and a clamping bolt (4) is provided at the end of the filter element frame (1) close to the filter element frame nut (14). The clamping bolt (4) passes through the filter element sleeve (2) and is rotatably connected to the filter element frame nut (14).

2. The suspended split filter element for filtering high-viscosity aramid slurry according to claim 1, characterized in that: The filter element frame (1) includes a frame support rod (11), and the frame support rod (11) is arranged in a ring on the outermost side of the filter element frame (1).

3. The suspended split filter element for filtering high-viscosity aramid slurry according to claim 2, characterized in that: The outer wall of the skeleton support rod (11) is provided with a filter hole (12), and the filter hole (12) is located at the end of the skeleton support rod (11) near the connecting external thread (13).

4. The suspended split filter element for filtering high-viscosity aramid slurry according to claim 1, characterized in that: The outer wall of the filter element and filter sleeve (2) is provided with a protective frame (21), and the protective frame (21) is coaxially connected with the filter element and filter sleeve (2).

5. The suspended split filter element for filtering high-viscosity aramid slurry according to claim 4, characterized in that: The filter element sleeve (2) is provided with a PTFE gasket (3) at one end near the clamping bolt (4), and the PTFE gasket (3) is located between the filter element sleeve (2) and the clamping bolt (4).

6. The suspended split filter element for filtering high-viscosity aramid slurry according to claim 5, characterized in that: The filter element and filter sleeve (2) are provided with an upper connector (25) and a lower connector (23) at both ends, and a filter element skeleton (1) is provided on the inner wall of the lower connector (23) and the upper connector (25).

7. A suspended split filter element for filtering high-viscosity aramid slurry according to claim 6, characterized in that: The filter element sleeve (2) has a sealing groove (22) at one end away from the clamping bolt (4), and a rubber ring (5) is provided inside the sealing groove (22), and the other side of the rubber ring (5) is fitted with the external thread (13).

8. A suspended split filter element for filtering high-viscosity aramid slurry according to claim 7, characterized in that: The outer wall of the filter element filter sleeve (2) is provided with a corrugated filter screen (24).

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