Disc filter

Abstract

The utility model discloses a disc filter which comprises the following components: a melt tank which is internally provided with a cavity, the top surface of the melt tank is provided with a melt inlet, and the bottom surface of the melt tank is provided with a melt outlet; the central column is arranged in the cavity, the top of the central column is connected with the melt inlet, and a plurality of through holes are formed in the outer wall surface of the central column; the central column is sleeved with the discs in a stacked mode, each disc comprises a circle of prosthesis area and a circle of fibrofelt area installed on the outer edge of the prosthesis area, and a plurality of flow channel openings communicated with the through holes are formed in the inner wall face of the prosthesis area. A plurality of prosthesis runners which are respectively communicated with the runner openings are inwards formed in the outer wall surface of the prosthesis area in the radial direction; the upper cover is arranged at the melt outlet; and the adjusting cushion block is arranged between the upper cover and the disc. The disc filter solves the problem that a disc easy to leak in an existing disc filter is easy to deform and damage.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging structures, and particularly relates to a disc filter. Background Art

[0002] In the production process of high-functional and optical-grade thin films (including casting, blown film, double drawing, etc.), such as CPP films for lithium batteries, high requirements are imposed on the control of crystal points and impurities inside the thin films. In addition to removing dust from the raw materials before the resin enters the extruder, it is also necessary to precisely filter the melt after the resin is melted. The precision filter includes a candle filter and a disc filter. Among them, the disc filter has a large filtration area and is more suitable for the production of such thin films. Due to the pressure difference between the melt inlet and outlet of the disc filter, the residence time at the melt inlet is long, which easily forms carbonized and crosslinked substances.

[0003] After retrieval, the existing patent (authorized announcement number CN 219596008 U) forms an accommodation cavity inside the first tank body, the second tank body, and the connecting pipe. A plurality of filter discs are arranged inside the accommodation cavity. The side wall of the filter disc is provided with a flow-through groove. The diameters of the flow-through grooves on the side walls of the plurality of filter discs are arranged from small to large from front to back. The side wall of the first tank body is provided with a feed inlet. A central support is abutted against the inner wall of the first tank body. The central support penetrates through a plurality of flow-through grooves and is connected to the second tank body. Since the diameters of the flow-through grooves on the side walls of the plurality of filter discs are different, and the diameter of the flow-through groove near the feed inlet is the largest, the flow area of the melt near the feed inlet is reduced, effectively offsetting the influence of back pressure, thereby making the overall efficiency consistent.

[0004] However, the above patent still has the following defects: First, the disc has a corresponding thickness, so there will be a step surface on the inner end surface between the discs, forming a dead angle and prone to internal leakage of materials; Second, when installing the whole set of discs, a pressure of 10-12 Mpa needs to be applied for pressing. Since the sizes of each disc are arranged from small to large, the inner side of the upper disc is prone to deform and damage the lower disc under the applied pressure.

[0005] Therefore, there is an urgent need to design a disc filter to solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a disc filter, which effectively solves the problems of easy internal leakage of materials and easy deformation and damage of the discs in the existing disc filter.

[0007] To achieve the above purpose, the utility model is realized through the following technical solutions: A disc filter, which includes:

[0008] A melt tank is provided with a cavity inside. A melt inlet is formed on the top surface of the melt tank, and a melt outlet is formed on the bottom surface.

[0009] A central column disposed in the cavity and connected to the melt inlet at the top, with a plurality of through holes formed on its outer wall surface.

[0010] A plurality of discs stacked and sleeved on the central column. Each disc includes a prosthetic area and a fiber felt area installed on the outer edge of the prosthetic area. A plurality of flow ports communicating with the through holes are formed on the inner wall surface of the prosthetic area. A plurality of prosthetic channels respectively communicating with the flow ports are radially inwardly formed on the outer wall surface of the prosthetic area. The fiber felt area includes a plurality of fiber felts laid on top of each other.

[0011] An upper cover disposed at the melt outlet and locking the discs through fastening bolts; and

[0012] An adjusting spacer disposed between the upper cover and the discs;

[0013] Wherein, the areas of the prosthetic areas of the plurality of discs are distributed from large to small along the direction from the melt inlet to the melt outlet.

[0014] Preferably, the ratio of the area of the prosthetic area of the disc located at the topmost to the area of the disc is: the pressure difference between the melt inlet and the melt outlet to the pressure at the melt inlet.

[0015] Preferably, the inside of the central column is hollow, and its cross-section is circular or equilateral polygon.

[0016] Preferably, both the prosthetic area and the central column are made of stainless steel.

[0017] Preferably, the plurality of flow ports are circular small holes evenly distributed on the inner wall surface of the prosthetic area.

[0018] Preferably, the fiber felt area and the prosthetic area have the same thickness.

[0019] The present utility model provides a disc filter, which has the following beneficial effects:

[0020] The disc filter effectively solves the problems of easy leakage and deformation and damage of discs in existing disc filters through the design of the fiber felt area and prosthesis area of ​​the disc and their auxiliary structures. Specifically, the thicknesses of the discs in the disc filter of the present application are the same, and the thicknesses of the fiber felt area and prosthesis area in the disc are also the same. At the same time, the structural design of the prosthesis area prevents the formation of dead corners and internal leakage of the melt during filtration, and prevents the upper and lower discs from being easily damaged and deformed when stacked. In addition, the number of discs and the stability of the disc stacking can also be adjusted by adjusting the setting of the gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a disc filter of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of a disc in a disc filter of the utility model;

[0023] Figure 3 The utility model is a cross-sectional view of a disc in a disc filter.

[0024] In the figure: 1. melt tank; 11. cavity; 12. melt inlet; 13. melt outlet; 2. center column; 21. through hole; 3. disc; 31. fiber felt area; 32. prosthesis area; 321. flow channel outlet; 322. prosthesis flow channel; 4. upper cover; 5. adjusting pad; 6. fastening bolts. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] See also Figures 1-3 The utility model provides a technical solution: a disc filter, which comprises: a melt tank 1, a cavity 11 is provided in the melt tank, a melt inlet 12 is provided on the top surface of the melt tank 1, and a melt outlet 13 is provided on the bottom surface;

[0027] A center column 2 is disposed in the cavity 11 and connected to the melt inlet 12 at the top, and a plurality of through holes 21 are formed on the outer wall of the center column 2. In the present embodiment, the center column 2 is made of stainless steel, is hollow inside, and has a cylindrical or equilateral polygonal cross section.

[0028] A number of discs 3 stacked on the central column 2, each disc including a ring-shaped prosthesis area 32 of the same thickness and a ring-shaped fiber felt area 31 mounted on the outer edge of the prosthesis area 32. A number of flow ports 321 communicating with the through holes 21 are provided on the inner wall surface of the prosthesis area 32. Prosthesis flow channels 322 respectively communicating with the flow ports 321 are radially inwardly provided on the outer wall surface of the prosthesis area 32. The fiber felt area 31 includes a number of fiber felts laid on top of each other; in this embodiment, the area size of the prosthesis area 32 is determined according to actual needs, and it is made of stainless steel. The prosthesis flow channels 322 can be of any shape such as cylindrical, square, conical, etc.; the ratio of the area of the prosthesis area 32 of the disc 3 at the uppermost position to the area of the disc 3 is: the pressure difference between the melt inlet 12 and the melt outlet 13 and the pressure at the melt inlet 12; a number of flow ports 321 are circular small holes evenly distributed on the inner wall surface of the prosthesis area 32;

[0029] An upper cover 4 provided at the melt outlet 13 and locking the disc 3 through fastening bolts 6; and

[0030] An adjusting spacer 5 provided between the upper cover 4 and the disc 3; in this embodiment, the number of the whole set of discs 3 is adjusted by changing the thickness of the adjusting spacer 5;

[0031] Among them, the areas of the prosthesis areas 32 of a number of discs 3 are distributed from large to small along the direction from the melt inlet 12 to the melt outlet 13. In addition, the distribution of the prosthesis areas 32 of the discs 3 can be grouped distribution or gradual distribution.

[0032] The working principle of the present utility model is as follows:

[0033] First, the melt flows into the central column 2 through the melt inlet 12. Secondly, the melt in the central column 2 flows into the prosthesis flow channels 322 in the prosthesis areas 32 of each layer of the discs 3 through the through holes 21 via the flow ports 321, and then flows into the fiber felt area 31 from the prosthesis flow channels 322. The melt is filtered in the number of stacked fiber felts. Finally, the filtered melt flows into the cavity 11 of the melt tank 1 and then flows out through the melt outlet 13.

[0034] In summary, the present utility model has the following advantages:

[0035] The disc filter effectively solves the problems of easy leakage of materials inside the existing disc filter and easy deformation and damage of the discs through the design of the fiber felt area and the prosthesis area of the discs and their accessory structures. Specifically, the thickness between the discs in the disc filter of the present application is the same, and the thickness of the fiber felt area and the prosthesis area in the discs is also the same. At the same time, the structural design of the prosthesis area enables the melt not to form dead corners, internal leakage of materials, and easy damage and deformation when the upper and lower discs are stacked. In addition, the number of discs and the stacking stability of the discs can also be adjusted by setting the adjusting pads; the utility model also has the advantages of simple structure, low cost, easy installation and disassembly, etc.

[0036] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent replacements or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A disc filter, characterized in that: The disc filter comprises: A melt tank having a cavity therein, a melt inlet on the top surface and a melt outlet on the bottom surface; A central column disposed in the cavity and connected to the melt inlet at the top, with a plurality of through holes formed on the outer wall thereof; A plurality of discs stacked on the central column, each of the discs comprising a circle of prosthesis area and a circle of fiber felt area mounted on the outer edge of the prosthesis area, a plurality of flow channel openings connected with the through holes are opened on the inner wall surface of the prosthesis area, a plurality of prosthesis flow channels respectively connected with the flow channel openings are opened radially inward on the outer wall surface of the prosthesis area, and the fiber felt area comprises a plurality of fiber felts stacked together; an upper cover disposed at the melt outlet and locking the disc by fastening bolts; and an adjusting pad disposed between the upper cover and the disc; The areas of the dummy regions of the plurality of discs are distributed from large to small along the direction from the melt inlet to the melt outlet.

2. The disc filter according to claim 1, characterized in that: The ratio of the dummy area of ​​the uppermost disc to the area of ​​the disc is: the ratio of the pressure difference between the melt inlet and the melt outlet to the pressure at the melt inlet.

3. The disc filter according to claim 1, characterized in that: The center column is hollow inside, and its cross section is circular or equilateral polygonal.

4. The disc filter according to claim 1, characterized in that: The prosthesis area and the central column are both made of stainless steel.

5. The disc filter according to claim 1, characterized in that: The plurality of flow channel openings are circular small holes uniformly distributed on the inner wall surface of the prosthesis area.

6. The disc filter according to claim 1, characterized in that: The fiber mat region and the prosthesis region have the same thickness.

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