CN111744246A - Candle type filter - Google Patents
Candle type filter Download PDFInfo
- Publication number
- CN111744246A CN111744246A CN202010752670.4A CN202010752670A CN111744246A CN 111744246 A CN111744246 A CN 111744246A CN 202010752670 A CN202010752670 A CN 202010752670A CN 111744246 A CN111744246 A CN 111744246A
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- China
- Prior art keywords
- shell
- hole
- flange
- filter
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003825 pressing Methods 0.000 claims abstract description 30
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 15
- 239000011148 porous material Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000155 melt Substances 0.000 description 9
- 238000007599 discharging Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/114—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
- B01D29/54—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection arranged concentrically or coaxially
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a candle filter, which comprises a shell with a shell cavity and an opening at the bottom, an end cover arranged at the bottom of the shell and a plurality of filter elements vertically arranged in the shell cavity; the filter element comprises a filter screen section and a flange connected to the lower end of the filter screen section; after the end cover and the shell are installed and fastened together, the shell can press the flange plate tightly on the end cover through indirectly pressing the pressure plate, and meanwhile, the contact surface of the pressing surface and the pressure plate, the contact surface of the pressure plate and the flange plate and the contact surface of the flange plate and the positioning hole are kept sealed in sequence. This candle filter simple structure, ingenious can set up many filter cores in a filtration cavity, and the filter core installation is simple, simultaneously, can improve the filter effect, reduces complete machine size, manufacturing cost and maintenance cost.
Description
Technical Field
The invention relates to a candle filter.
Background
The melt filter is used for continuously filtering the high polymer melt, removing impurities and unmelted particles in the melt and improving the product performance and quality.
The structure of the existing melt filter is that a filter element is usually arranged in a shell-shaped inner cavity, the shell is provided with a feeding hole and a discharging hole, the discharging hole is communicated with the inner cavity of the filter element, the melt enters the shell from the feeding hole, then the melt penetrates through the filtering holes of the filter element under the action of high pressure to enter the inner cavity of the filter element, and finally the melt is discharged through the discharging hole, thereby completing the filtration.
Secondly, the existing filter element is divided into a plurality of structures such as a rod-shaped filter element, a disc-shaped filter element and the like, taking the rod-shaped filter element as an example, the rod-shaped filter element is a rod-shaped structure formed by sintering a plurality of layers of metal wire meshes, the center of the rod is provided with a reinforcing framework which can bear the pressure during filtering, and one end of the rod-shaped filter element is provided with an installation end part with a thread section; in addition, almost all the filter elements are provided with an installation end part at one end, and the installation end part is provided with a thread butt joint structure such as an external thread, so that the filter elements are directly installed in the shell in a screw installation mode; firstly, the filter element connected in the shell in a screw-mounting mode has long installation time, is troublesome and labor-consuming, and has high installation labor intensity due to narrow installation space; secondly, due to the limited thread machining precision, thread gaps screwed together are easy to extrude into melt, and meanwhile, the melt is easy to seep out through the thread gaps, so that the material seepage condition is generated; secondly, when the filter element is disassembled after the machine is stopped, the melt in the thread gap is cooled and solidified, so that the disassembly strength of the filter element is high.
Finally, because the filter element is installed in the inner cavity of the shell in a screw-mounting manner, a structural manner of 'one inner cavity and one filter element' is generally adopted, and therefore the conditions that the overall shape of the multi-filter-element filter is large, the manufacturing cost is high, the cavity is arranged in a complex manner, and the filtering efficiency is low are caused.
Disclosure of Invention
The invention aims to provide a candle filter which has a simple structure, can arrange a plurality of filter elements in one filter cavity, and has simple installation of the filter elements, thereby improving the filter effect and reducing the size, the manufacturing cost and the maintenance cost of the whole machine.
In order to solve the technical problem, the filter comprises a shell with a shell cavity and an opening at the bottom, an end cover arranged at the bottom of the shell and a plurality of filter elements vertically arranged in the shell cavity;
the filter element comprises a filter screen section for filtering melt and a flange connected to the lower end of the filter screen section, and the middle part of the flange is provided with a material through hole communicated with the inner cavity of the filter screen section;
the top of the end cover is uniformly provided with positioning holes for inserting each flange plate, and the bottom of the end cover is provided with a discharge hole communicated with each positioning hole;
a pressure plate which is pressed against the top surfaces of the plurality of flange plates simultaneously is arranged in the inner cavity of the shell, and avoidance holes for avoiding the filter screen body section are uniformly distributed on the pressure plate;
the shell is provided with a pressing surface which presses the top surface of the pressure plate;
after the end cover and the shell are installed and fastened together, the shell can press the flange plate tightly on the end cover through indirectly pressing the pressure plate, and meanwhile, the contact surface of the pressing surface and the pressure plate, the contact surface of the pressure plate and the flange plate and the contact surface of the flange plate and the positioning hole are kept sealed in sequence.
After the structure is adopted, in the assembly process, the plurality of filter elements are vertically inserted into the positioning holes one by one, then the pressure plate is pressed against the top surfaces of the flange plates of the plurality of filter elements from top to bottom, then the shell is buckled, and finally the plurality of filter elements are clamped between the shell and the end cover by fastening the shell and the end cover; meanwhile, the contact surface of the pressing surface and the pressing plate, the contact surface of the pressing plate and the flange plate and the contact surface of the flange plate and the positioning hole are sequentially sealed, so that the sealing property of the inner cavity of the weight housing is finally guaranteed; during melt filtration, the melt is pressed into the inner cavity of the shell under high pressure, and then the melt sequentially passes through the filtering holes of the filter screen body section, the inner cavity of the filter element, the feed opening, the positioning hole and the discharge hole, is finally filtered and is discharged to the outer side of the filter; in the filter element maintenance and overhaul process, the filter element and the pressure plate in the filter can be taken out in sequence only by loosening the connection between the end cover and the shell, so that the filter element maintenance and overhaul device is simple and convenient to mount, dismount and process, and meanwhile, a plurality of filter elements can be placed in the inner cavity of one shell, so that the filter effect is good.
Furthermore, the lower opening of the shell cavity is provided with a pressing hole larger than the shell cavity, and the top surface of the pressing hole is a pressing surface pressed on the top surface of the pressure plate.
In order to improve the sealing performance between the pressure plate and the shell, the outer diameter of the pressure plate is matched with the aperture of the pressure holding hole.
Further, the end cap comprises an end cap body and a support plate;
the top of the end cover body is provided with a support hole and a collecting groove positioned at the bottom of the support hole, and the discharge hole is communicated with the collecting groove;
the supporting plate is positioned in the supporting hole, and the bottom surface of the supporting plate is in sealing contact with the bottom surface of the supporting hole;
the locating holes are uniformly distributed on the supporting plate, and through holes for communicating the collecting groove with each locating hole are formed in the supporting plate.
In order to improve the size and the sealing performance of the contact surface between the support plate and the end cover body, the outer diameter of the support plate is matched with the aperture of the support hole.
Furthermore, the flange plate comprises a flange plate body at the upper end and a positioning pipe at the lower end, and the outer diameter of the positioning pipe is smaller than that of the flange plate body; the outer diameter of the positioning pipe is matched with that of the positioning hole, the bottom surface of the positioning pipe is in sealing contact with the bottom surface of the positioning hole, and the length of the positioning pipe is greater than the depth of the positioning hole; the pressing surface is pressed against the top surface of the flange plate body.
In order to improve the stability of being connected between pressure disk and the filter core, the bottom of pressure disk is equipped with the guiding hole of dodging the coaxial setting in hole with every, the upper end position of ring flange is in the guiding hole, the top surface and the ring flange top surface sealing contact of guiding hole.
In order to avoid the guiding hole and the flange plate clearance undersize to increase the dismouting intensity of filter core and pressure disk, the guiding hole sets up with flange plate external diameter clearance.
In order to realize the connecting structure of the shell and the end cover, a plurality of threaded holes are uniformly distributed on the bottom surface of the shell, through holes corresponding to the threaded holes are formed in the end cover, and the end cover is installed at the bottom of the shell through bolts which penetrate through the through holes from bottom to top and are screwed in the threaded holes.
The top of the shell is provided with a feed inlet communicated with the shell cavity.
In conclusion, the filter cavity is simple and ingenious in structure, the plurality of filter elements can be arranged in one filter cavity, the filter elements are simple to install, meanwhile, the filter effect can be improved, and the size, the manufacturing cost and the maintenance cost of the whole machine are reduced.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a front sectional structural view of the present invention;
FIG. 3 is a schematic perspective view of the present invention without the housing;
fig. 4 is a schematic view of the split structure of fig. 3.
Detailed Description
Referring to the attached drawings, the candle filter comprises a shell 1 with a shell cavity and an open bottom and an end cover 2 arranged at the bottom of the shell 1, wherein the shell 1 is a vertically arranged cylindrical shell 1, the end cover 2 is also a cylindrical cover body, the wall thickness of the shell 1 is reasonably arranged according to the use pressure of filtering melt, and the top of the shell 1 is provided with a feed inlet 18 communicated with the shell cavity; in addition, a plurality of filter elements 3 are also vertically arranged in the shell 1, as shown in fig. 3, the number of the filter elements 3 is 7, and of course, the number of the filter elements 3 can be increased or decreased according to the filtering efficiency; the filter element 3 comprises a filter screen section 4 and a flange 5, wherein the upper end part of the filter screen section 4 is used for filtering melt, the flange 5 is connected to the lower end of the filter screen section 4, and the middle part of the flange 5 is provided with a material through hole communicated with the inner cavity of the filter screen section 4; the filter element 3 is a filter element 3 with a rod-shaped structure, of course, different types of filter elements 3 can be selected according to requirements, however, a rigid flange 5 is required to be arranged at the bottom of each filter element 3, and the flange 5 is made of metal.
Continuing to refer to the attached drawings, 7 positioning holes 6 for inserting each flange plate 5 are uniformly distributed at the top of the end cover 2, and a discharge hole 7 communicated with each positioning hole 6 is formed at the bottom of the end cover 2; if the end cover 2 is of an integral structure, and the end cover 2 of the integral structure is shown in the figure, the processing of the pore channel for connecting the discharging hole 7 and the positioning hole 6 is complex, and the pore channel is not easy to clean in the subsequent maintenance process; therefore, the end cap 2 of the present invention is preferably of a two-piece structure, as shown in fig. 2 and 4, the two-piece end cap 2 includes a lower end cap body 11 and an upper circular support plate 12; the top of the end cover body 11 is provided with a support hole 14 and a concave collecting groove 13 which is positioned at the bottom of the support hole 14, so that a pore channel of the discharge hole directly extends upwards and can be communicated with the collecting groove 13; the support plate 12 is positioned in the support hole 14, the height of the support plate 12 is greater than the depth of the support hole 14, and secondly, the bottom surface of the support plate 12 is in sealing contact with the bottom surface of the support hole 14; in addition, the positioning holes 6 are uniformly distributed on the top surface of the supporting plate 12, meanwhile, the bottom of the supporting plate 12 is provided with a through hole which is vertically communicated with the collecting groove 13 and each positioning hole 6, and the aperture of the through hole is smaller than that of the positioning hole 6; in addition, in order to improve the size and the sealing performance of the contact surface between the support plate 12 and the end cover body 11, the outer diameter of the support plate 12 is matched with the aperture of the support hole 14, that is, the support plate 12 and the support hole 14 are connected in an over-fit and interference fit manner.
Continuing to refer to the attached drawings, a pressure plate 8 which is pressed on the top surfaces of the plurality of flange plates 5 at the same time is arranged in the inner cavity of the shell 1, and avoidance holes 9 which are used for avoiding the filter screen body sections 4 and for enabling the filter screen body sections 4 to extend upwards are uniformly distributed on the pressure plate 8; secondly, a pressing surface for pressing the top surface of the pressure plate 8 is arranged on the shell 1; the pressing surface can be directly the bottom surface of the shell 1, however, when the bottom surface of the shell 1 is used as the pressing surface, the high-pressure melt in the shell cavity may seep out from the gap between the bottom surface of the shell 1 and the pressing surface during filtering, therefore, as shown in fig. 2, the invention is provided with a pressing hole 10 larger than the shell cavity at the lower opening of the shell cavity, and the top surface of the pressing hole 10 is preferably the pressing surface pressed on the top surface of the pressure plate 8; in addition, in order to increase the size of the contact surface between the pressure plate 8 and the housing 1, and thus improve the sealing performance, the outer diameter of the pressure plate 8 matches the aperture of the pressure holding hole 10, that is, the pressure plate 8 and the pressure holding hole 10 adopt the connection mode of over-fit and interference fit.
With continued reference to the drawings, the flange 5 may be a disk with an equal diameter, that is, the lower end of the flange 5 is directly inserted into the positioning hole 6, however, it is preferable that the flange 5 includes an upper flange body 15 and a lower positioning pipe 16, and the outer diameter of the positioning pipe 16 is smaller than that of the flange body 15, at this time, the pressing surface presses against the top surface of the flange body 15 with a large diameter, and the pressing force for pressing the filter element 3 can be ensured by pressing the flange body 15 with a large diameter; the outer diameter of the positioning tube 16 is matched with the outer diameter of the positioning hole 6, namely, the positioning tube 16 and the positioning hole 6 adopt an excessive fit and interference fit connection mode, so that the connection sealing performance between the positioning tube 16 and the positioning hole 6 can be improved, the small-diameter positioning tube 16 and the positioning hole 6 can be conveniently detached and separated, correspondingly, the bottom surface of the positioning tube 16 is in sealing contact with the bottom surface of the positioning hole 6, and meanwhile, the length of the positioning tube 16 is larger than the depth of the positioning hole 6. In addition, in order to improve the connection stability between the pressure plate 8 and the filter element 3 and improve the structural strength of the pressure plate 8, the bottom surface of the pressure plate 8 extends downwards to a certain thickness beyond the top surface of the flange 5, correspondingly, the bottom of the pressure plate 8 is provided with a guide hole 17 coaxially arranged with each avoidance hole 9, the upper end of the flange body 15 is positioned in the guide hole 17, and at the moment, the top surface of the guide hole 17 is in sealing contact with the top surface of the flange 5. In addition, in order to avoid an increase in the strength of attachment/detachment of the filter element 3 and the pressure plate 8 due to an excessively small gap between the guide hole 17 and the flange 5, the guide hole 17 and the flange 5 are provided with an outer diameter gap.
In order to realize the connection locking structure that the shell 1 and the end cover 2 can coaxially and relatively move up and down, a plurality of threaded holes are uniformly distributed on the bottom surface of the shell 1, through holes corresponding to the threaded holes are formed in the end cover body 11, the end cover body 11 is installed at the bottom of the shell 1 through bolts penetrating through the through holes from bottom to top and screwed in the threaded holes, and then after the end cover body 11 and the shell 1 are installed and fastened together, a certain gap is formed between the top surface of the end cover body 11 and the bottom surface of the shell 1, so that the support plate 12, the flange plate 5 and the pressure plate 8 are conveniently clamped between the end cover body 11 and the shell 1.
In summary, after the end cover body 11 and the housing 1 are mounted and fastened together, the housing 1 can press the flange 5 against the supporting plate 12 and the end cover body 11 by indirectly pressing the pressure plate 8, and simultaneously, the contact surface between the pressing surface and the pressure plate 8, the contact surface between the pressure plate 8 and the flange 5, the contact surface between the flange 5 and the positioning hole, and the contact surface between the supporting plate 12 and the supporting hole 14 are sequentially kept sealed.
In summary, the present invention is not limited to the above-described embodiments. Those skilled in the art can make several changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications should fall within the scope of the present invention.
Claims (10)
1. A candle filter, characterized by:
the filter comprises a shell (1) with a shell cavity and an opening at the bottom, an end cover (2) arranged at the bottom of the shell (1) and a plurality of filter elements (3) vertically arranged in the shell cavity;
the filter element (3) comprises a filter screen section (4) for filtering melt and a flange (5) connected to the lower end of the filter screen section (4), and the middle part of the flange (5) is provided with a material through hole communicated with the inner cavity of the filter screen section (4);
positioning holes (6) for inserting each flange plate (5) are uniformly distributed in the top of the end cover (2), and a discharge hole (7) communicated with each positioning hole (6) is formed in the bottom of the end cover (2);
a pressure plate (8) which is pressed against the top surfaces of the plurality of flange plates (5) is arranged in the inner cavity of the shell (1), and avoidance holes (9) which are used for avoiding the filter screen body sections (4) are uniformly distributed in the pressure plate (8);
the shell (1) is provided with a pressing surface which presses against the top surface of the pressure plate (8);
after the end cover (2) and the shell (1) are installed and fastened together, the shell (1) can press the flange (5) on the end cover (2) through indirectly pressing the pressure plate (8), and meanwhile, the contact surface of the pressing surface and the pressure plate (8), the contact surface of the pressure plate (8) and the flange (5) and the contact surface of the flange (5) and the positioning hole are kept sealed in sequence.
2. A candle filter as in claim 2, wherein the lower opening of the shell cavity is provided with a pressure holding hole (10) larger than the shell cavity, and the top surface of the pressure holding hole (10) is a pressure holding surface pressed against the top surface of the pressure plate (8).
3. Candle filter according to claim 2, characterized in that the outer diameter of the pressure plate (8) is matched to the pore size of the pressure holding hole (10).
4. A candle filter as in claim 1, wherein:
the bottom cover comprises an end cover body (11) and a supporting plate (12);
the top of the end cover body (11) is provided with a support hole (14) and a collecting groove (13) positioned at the bottom of the support hole (14), and the discharge hole is communicated with the collecting groove (13);
the support plate (12) is positioned in the support hole (14), and the bottom surface of the support plate (12) is in sealing contact with the bottom surface of the support hole (14);
the positioning holes (6) are uniformly distributed on the supporting plate (12), and through holes for communicating the collecting groove (13) with each positioning hole (6) are formed in the supporting plate (12).
5. Candle filter according to claim 4, characterized in that the outer diameter of the support plate (12) is matched to the pore size of the support pores (14).
6. A candle filter according to claim 1, characterized in that the flange (5) comprises an upper flange body (15) and a lower positioning tube (16), the outer diameter of the positioning tube (16) being smaller than the outer diameter of the flange body (15); the outer diameter of the positioning tube (16) is matched with that of the positioning hole (6), the bottom surface of the positioning tube (16) is in sealing contact with the bottom surface of the positioning hole (6), and the length of the positioning tube (16) is greater than the depth of the positioning hole (6); the pressing surface is pressed against the top surface of the flange plate body (15).
7. A candle filter as in claim 6, wherein the bottom of the pressure plate (8) is provided with a guide hole (17) coaxially arranged with each relief hole (9), the upper end of the flange (5) is positioned in the guide hole (17), and the top surface of the guide hole (17) is in sealing contact with the top surface of the flange (5).
8. A candle filter as in claim 7, wherein the guide opening (17) is arranged at a distance from the outer diameter of the flange (5).
9. The candle filter as in claim 1, wherein a plurality of threaded holes are uniformly distributed on the bottom surface of the shell (1), the end cap (2) is provided with through holes corresponding to the threaded holes, and the end cap (2) is mounted on the bottom of the shell (1) through bolts which penetrate through the through holes from bottom to top and are screwed in the threaded holes.
10. A candle filter as in claim 1, wherein the top of the housing (1) is provided with a feed opening (18) communicating with the housing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010752670.4A CN111744246A (en) | 2020-07-30 | 2020-07-30 | Candle type filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010752670.4A CN111744246A (en) | 2020-07-30 | 2020-07-30 | Candle type filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111744246A true CN111744246A (en) | 2020-10-09 |
Family
ID=72712366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010752670.4A Pending CN111744246A (en) | 2020-07-30 | 2020-07-30 | Candle type filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111744246A (en) |
-
2020
- 2020-07-30 CN CN202010752670.4A patent/CN111744246A/en active Pending
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