CN211302194U - Combined filter plate and filter frame - Google Patents
Combined filter plate and filter frame Download PDFInfo
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- CN211302194U CN211302194U CN201921317228.8U CN201921317228U CN211302194U CN 211302194 U CN211302194 U CN 211302194U CN 201921317228 U CN201921317228 U CN 201921317228U CN 211302194 U CN211302194 U CN 211302194U
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- filter plate
- frame
- filter frame
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Abstract
The utility model relates to a combined filter plate and filter frame, which comprises a filter plate and a filter frame, wherein the filter plate and the filter frame are combined into a group, the middle of the filter plate is provided with a core plate, the outer ear of the filter plate is arranged, the blind hole is arranged, the liquid outlet hole is arranged, the left liquid outlet hole of the filter plate is connected with the left blind hole, the right liquid outlet hole of the filter plate is connected with the right blind hole, the liquid outlet hole is arranged, the middle of the filter frame is hollow, the outer ear of the filter frame is arranged, one or two feeding channels are correspondingly arranged at the two upper corners of the outer ear of the filter frame, a shunt hole is arranged, the shunt hole is arranged at the side of the filter frame, the shunt hole is connected with the feeding channels, the blind hole is arranged, and the blind hole on the filter frame is correspondingly arranged at the outer ear of the two lower corners of; the purposes of convenient filter cloth replacement and high filtering efficiency are achieved.
Description
Technical Field
The utility model relates to a modular filter plate filter frame, concretely relates to modular filter plate filter frame filter unit.
Background
The filter frame and the filter plate are main filter elements of the filter press, are suitable for filtering various materials and are widely applied to the solid-liquid separation industry, in order to reduce the water content of filter cakes, the filter cakes are subjected to diaphragm squeezing after filtering is finished, residual water in the filter cakes is discharged after the diaphragm squeezing, and filtrate is discharged from liquid outlet holes at four corners of the filter plate, so that the purpose of solid-liquid separation is realized; due to the development of economy, the types of materials filtered in the solid-liquid separation industry are gradually increased, in order to improve the economic benefit and reduce the cost, the currently used filter plate and filter frame cannot meet the market demand, the feeding time is long, the thickness of a filter cake is not uniform, the filtering speed is low, the production cost is high, and the filter cloth is troublesome to install, so that the economic benefit is influenced.
Disclosure of Invention
The utility model aims at solving the shortcomings existing in the prior art, and providing a combined filter plate and filter frame, which can achieve the purposes of convenient filter cloth replacement and efficient filtration.
In order to achieve the purpose, the utility model provides a combined filter plate and filter frame, which comprises a filter plate and a filter frame, the filter plate and the filter frame are combined into a group,
the middle of the filter plate is provided with a core plate;
the method comprises the following steps that a filter plate outer spanning lug is arranged, the filter plate outer spanning lug is arranged at the upper corner part and the lower corner part of two sides of a filter plate, and at least one feeding channel is correspondingly arranged at the two upper corner parts of the filter plate outer spanning lug;
arranging a hidden flow hole, wherein the hidden flow hole on the filter plate is correspondingly arranged on the outer cross ears of the filter plate at the two lower corners of the filter plate;
the filter plate is provided with liquid outlet holes which are correspondingly arranged at the left lower corner and the right lower corner of the filter plate, the left liquid outlet hole of the filter plate is connected with a left blind flow hole, and the right liquid outlet hole of the filter plate is connected with a right blind flow hole;
the filter plate is characterized in that liquid discharge holes are arranged, two filter chambers of the filter plate are provided with two groups of liquid discharge holes in one-to-one correspondence, the two groups of liquid discharge holes are arranged at the lower corners of the left side and the right side of each filter chamber, the liquid discharge hole on the left side is connected with the liquid outlet hole on the left side, and the liquid discharge hole on the right side is connected with the liquid outlet hole;
the middle of the filter frame is hollow,
arranging filter frame outer cross lugs, wherein the filter frame outer cross lugs are arranged at the upper corners and the lower corners of two sides of the filter frame, and one or two feeding channels are correspondingly arranged at the two upper corners of the filter frame outer cross lugs;
the filter frame is provided with a feeding channel, a filter frame and a plurality of filter holes, wherein the feeding channel is arranged on the side surface of the filter frame;
arranging dark flow holes, wherein the dark flow holes on the filter frame are correspondingly arranged on the filter frame outer cross ears at the two lower corners of the filter frame;
and rubber sealing rings are arranged on the side surfaces of the feeding channel and the dark flow hole of the filter plate and the filter frame respectively.
The filter plate and the filter frame are combined into a set of filter unit, the filter plate and the filter frame are mutually matched and connected into a set, a feeding channel on the filter plate and a feeding channel on the filter frame are correspondingly matched and communicated, and a blind flow hole on the filter plate and a blind flow hole on the filter frame are correspondingly matched and communicated.
The edge of the inner frame at the two sides of the filter frame is provided with a convex surface table which is matched with the edge of the filter chamber corresponding to the filter plate.
The rubber sealing rings are arranged on two sides of the filter frame or on two sides of the filter plate or on one side of the filter plate corresponding to the filter frame.
The filter plate and the filter frame are provided with one or more groups of grooves and convex grooves at corresponding positions of the pressure surfaces, and the grooves are matched with the convex grooves.
The inside downside in straining frame center be equipped with the elasticity extrusion body, the elasticity extrusion body be the rubber bag, inside extrusion mode is spring compression form or aerifys atmospheric pressure form, inside this elasticity extrusion body is fixed in straining frame, the extrusion of elasticity extrusion body effort mainly towards the filter chamber direction, the below length of this elasticity extrusion body is not more than straining frame inward flange length.
The filter plate is assembled by adopting a lattice support frame and a module mode.
The filter plate is provided with a diaphragm die piece with a shape matched with the filter plate, a liquid inlet channel is arranged on the filter plate, one end of the liquid inlet channel is communicated with a containing cavity between the diaphragm and the filter plate, a tympanic membrane feeding channel is arranged and connected with the liquid inlet channel, and the diaphragm die piece is made of ethylene propylene diene monomer.
The filter frame and the filter frame are square or isosceles trapezoid, and the ladder-shaped filter plate filter frame is externally crossed on two sides of the ladder shape.
The thickness H of the filter frame is larger than the thickness of the corresponding filter plate, a support table is arranged inside the filter chamber corresponding to the filter plate, the height of the support table is higher than the pressure surface H/2 of the filter plate, and reinforcing ribs are arranged inside the filter frame.
The working steps are as follows:
the method comprises the following steps: the material to be filtered enters the feeding channel through the feeding pump and enters between the two filter cloths through the shunting holes;
step two: the filter plate is subjected to tympanic membrane by liquid inlet through the feeding channel on the other side, so that the material to be filtered is discharged through the blind flow hole under the action of feeding pressure or tympanic membrane;
step three: backwashing the feeding channel by a water pump;
step four: the air supply channel is swept by an air tank;
step five: washing solution enters through a dark flow hole at one side of the filter plate and is discharged through a dark flow hole at the other side of the filter plate;
step six: the air tank blows air through the blind hole on one side, the air flow enters the filter cake in the filter chamber to be dried and squeezed, the air is exhausted through the blind hole on the other side, and meanwhile, partial water is taken away.
The utility model has the advantages that:
1. the single-chamber filter frame is fed with materials which enter the filter chamber with balanced pressure, and the filter cake with high filter speed has uniform thickness;
2. a rubber sealing ring is arranged between the filter plate and the filter frame, so that the effects of enlarging the feeding pressure range and enhancing the sealing property are achieved;
3. an outer ear-crossing filter chamber is arranged to increase the effective filtering area;
4. the filter frame is provided with the convex platform, and the main function of the filter frame is that when the filter frame runs, the high-pressure borne by the filter frame is transferred to the filter frame in a convex platform mode, so that the service life of the filter frame is effectively prolonged, the limitation type of pressure use of the filter frame is avoided, the relaxation of filter cloth is ensured, and the sealing performance of the filter plate and the filter frame is also enhanced;
5. the filter cloth is convenient to install and only needs to be put on the filter plate;
6. a rubber bag is arranged at the lower part in the filter frame, so that residue of filter residue is avoided;
7. the thickness of the filter frame is larger than that of the filter plate, so that the compression strength of the filter frame is increased, and the filtering capacity is effectively increased;
8. the grooves and the convex grooves increase the sealing performance between the filter plate and the filter frame.
Drawings
FIG. 1 is a combination view of a combined filter plate and filter frame of the present invention;
FIG. 2 is a perspective view of a filter frame of the combined filter plate according to the present invention;
FIG. 3 is a front view of a combined filter plate frame corresponding to a filter plate according to the present invention;
FIG. 4 is a bottom view of the combined filter plate frame corresponding to the filter plate of the present invention;
FIG. 5 is a left side view of the combined filter plate frame corresponding to the filter plate of the present invention;
FIG. 6 is a perspective view of a filter frame corresponding to the combined filter plate of the present invention;
FIG. 7 is a front view of a filter frame corresponding to the combined filter plate of the present invention;
in the figure: 1. the filter plate 2, the filter frame 3, the filter plate outer span lug 4, the feed channel 5, the liquid outlet hole 6, the blind flow hole 7, the filter chamber 8, the liquid outlet hole 9, the filter frame outer span lug 10, the shunt hole 11, the elastic extrusion body 12, the groove 13 and the convex groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Examples
The shape of the filter plate and the filter frame determines the filtering mode of the filter press, according to the shape shown in fig. 1-7, the combined filter plate and filter frame mainly combines the filter plate 1 and the filter frame 2 into a filtering unit, the middle of the filter plate 1 is a solid core plate, the filter plate 1 is provided with the filter plate outer span lug 3, the filter plate outer span lug 3 is arranged at the upper corner part and the lower corner part of the two sides of the filter plate 1, the two upper corner parts of the filter plate outer span lug 3 are correspondingly provided with one or two feeding channels 4, in the specific application, the feeding mode can be fed by the feeding channel 4 at one side or can be fed simultaneously at two sides.
The filter plate 1 is also provided with two blind flow holes 6, the two blind flow holes 6 are correspondingly arranged on the outer cross lugs 3 of the filter plate at the two lower corners of the filter plate 1, and the size of the aperture of the blind flow hole 6 is determined according to the actual size of the filter plate 1; two liquid outlet holes 5 are also formed, the two liquid outlet holes 5 are correspondingly arranged at the two lower corners of the filter chamber 7, and the two liquid outlet holes 5 are correspondingly connected with the two blind flow holes 6 one by one; the filter chamber 7 is internally provided with liquid discharge holes 8, the two filter chambers 7 of the filter plate 1 are provided with the two liquid discharge holes 8 in a one-to-one correspondence manner, the two groups of liquid discharge holes 8 are arranged at the lower corners of the left side and the right side of the filter chambers 7, the left liquid discharge hole 8 is connected with the left liquid discharge hole 5, and the right liquid discharge hole 8 is connected with the right liquid discharge hole 5.
The middle of the filter frame 2 is of a hollow structure, the filter frame outer cross lugs 9 are arranged on the filter frame 2, the filter frame outer cross lugs 9 are arranged at the upper corner part and the lower corner part of the two sides of the filter frame 2, one or two feeding channels 4 are correspondingly arranged at the two upper corner parts of the filter frame outer cross lugs 9, and the number of the arranged feeding channels 4 is consistent with that of the filter plate 1; still set up reposition of redundant personnel hole 10 on straining frame 2, reposition of redundant personnel hole 10 in the side of straining frame 2, reposition of redundant personnel hole 10 is connected with feedstock channel 4, reposition of redundant personnel hole 10 still with straining frame 2 internal connection.
Similarly, two blind flow holes 6 are also arranged on the filter frame 2, and the two blind flow holes 6 are correspondingly arranged on the filter frame outer spanning ears 9 at two lower corners of the filter frame 2.
In the concrete application, in order to guarantee the sealing performance of the feeding of the filter plate 1 and the filter frame 2 when combined, a rubber sealing ring is further arranged, the rubber sealing ring is arranged on the side surfaces of the feeding channel 4 and the blind flow hole 6 of the filter plate 1 and the filter frame 2 and is tightly matched with the blind flow hole 6 and the feeding channel 4, and in practical application, the rubber sealing ring can be arranged on the filter plate 1, can be arranged on the filter frame 2 and can also be arranged on the same side of the filter plate 1 and the filter frame 2.
Preferably, the blind flow hole 6, the feeding channel 4 and the sealing ring are arranged in a circle, and the sealing ring is concentric with the blind flow hole 6 and the feeding channel 4 respectively.
The filter plate 1 and the filter frame 2 are combined to form a set of filter unit, the filter plate 1 and the filter frame 2 are connected into a set in a matching way, the feeding channel 4 of the filter plate 1 is correspondingly communicated with the feeding channel 4 of the filter frame 2 in a matching way, and the blind flow hole 6 of the filter plate 1 is correspondingly communicated with the blind flow hole 6 of the filter frame 2 in a matching way.
In order to guarantee that the tension of the filter cloth is not influenced by the filter frame 2, the edges of the inner frames on two sides of the filter frame 2 are provided with convex surface tables, the convex surface tables are matched with the edge positions of the filter chambers 7 corresponding to the filter plate 1, so that in the process of matching the filter plate 1 with the filter frame 2, the filter cloth is firmly supported by the convex surface tables of the filter frame 2, in the operation process, the filter frame 2 bears the great pressure, the convex surface table matching device is arranged on the inner side of the filter plate 1, and thus, the pressure of the filter frame 2 is transferred to the filter plate 1 in a mode of passing through the convex surface tables, the compression range of the filter frame 2 is increased, meanwhile, the filter frame 2 is not easy to deform, and the service life of the filter frame 2 is prolonged.
In the concrete application, in order to ensure that the slurry inside the filter plate 1 leaks between the filter plate 1 and the filter frame 2 in the process of being pressed, one or more groups of grooves 12 and convex grooves 13 are arranged at the corresponding positions of the pressed surfaces of the filter plate 1 and the filter frame 2, and the grooves 12 and the convex grooves 13 are in fit contact with each other, so that the tight assembly of the filter plate 1 and the filter frame 2 is ensured, and the leakage is avoided.
In the concrete implementation, the inside downside in straining frame 2 center be equipped with elasticity extrusion body 11, this elasticity extrusion body 11 is fixed in inside straining frame 2, the extrusion of elasticity extrusion body 11 effort mainly towards 7 directions of filter chamber, it mainly is the in-process of guaranteeing the filter cake at the unloading, because the outside extrusion of elasticity extrusion body 11, make partial filter cake can not remain on 2 interior survey bottoms of filter frame, in order not to influence the back washing process in later stage simultaneously, the below length of this elasticity extrusion body 11 is not more than 2 inward flange lengths of filter frame, under the combination state, can permeate water and breathe freely in order to ensure two filter chamber 7 bottoms.
Optimally, the elastic extrusion body 11 be the rubber bag, inside extrusion power source be spring compression form or aerify atmospheric pressure form, this rubber bag's the pressurized surface from top to bottom crescent, this elastic extrusion body 11 is inside to be equipped with the support frame simultaneously and guarantees that the elastomer all is fixed in the interior survey of filter frame 2 all the time.
In the above implementation, an adaptive membrane template can be further assembled on the filter plate 1, so that the filter cake is further subjected to tympanic membrane dehydration in a tympanic membrane manner in the filtering process, the feeding time is shortened, and the feeding efficiency is accelerated; meanwhile, the inner core of the filter plate 1 is protected, the service life of the filter plate 1 is prolonged, only the diaphragm needs to be replaced, and the replacement cost of the filter plate 1 is reduced; in the concrete application process, be equipped with inlet channel, if establish a feedstock channel on the filter plate, then another feedstock channel is inlet channel promptly, if establish two feedstock channel on the filter plate, then inlet channel is at the middle plate middle part, the appearance chamber between this inlet channel one end intercommunication diaphragm and the filter plate is equipped with tympanic membrane feedstock channel, tympanic membrane feedstock channel is connected with inlet channel, the diaphragm adopts the EPT material, this kind of material not only thermoplasticity is good, has had high temperature resistant and high pressure resistant characteristic concurrently, the diaphragm has still increased the leakproofness of combination unit between filter plate 1 and the filter frame 2.
The utility model discloses in, filter plate 1 and filter frame 2 be square or isosceles trapezoid, if isosceles trapezoid, trapezoidal filter plate 1 and filter frame 2, the filter plate stride ear 3 outward and filter frame stride ear 9 outward respectively on trapezoidal two waists, the width of the upper base of filter plate 1 is less than the width of going to the bottom, such purpose has increased filter area, has guaranteed simultaneously that the filter cake easily drops at the in-process of whereabouts to be difficult for remaining.
In a specific example, the filter plate 1 may be assembled by a grid plate and a die set, so as to enhance the compressive strength of the filter plate 1.
In the implementation, the shape of rubber gasbag from inside from top to bottom of filter frame can be for reducing gradually (not shown in the figure), also can have both sides looks middle to reduce gradually, the utility model discloses in do not injecing the concrete shape of gasbag.
Optimally, the thickness H of the filter frame 2 is larger than the thickness of the corresponding filter plate 1, the filter plate 1 is provided with a supporting table corresponding to the filter chamber 7, the supporting table is higher than the pressure-bearing surface H/2 of the filter plate 1, reinforcing ribs are arranged inside the filter frame 2, the pressure balance of the whole filter plate is guaranteed, the bearing strength of the filter frame is guaranteed, the dehydration function under a high-pressure state is met, the filter volume is increased more importantly, and the filtering effective efficiency of the device is accelerated.
In the invention, during specific operation, the feeding channel 4 can blow and blow back, wherein the dark flow holes 6 on one side of the combined unit can be used as inlet channels for cleaning and air drying, and the dark flow holes 6 on the other side can be used as inlet and outlet channels for cleaning and air drying; taking air drying as an example, high-pressure air blowing is carried out through equipment, high-pressure air current enters the liquid outlet hole 5 on one corresponding side through the blind flow hole 6 on one side of the filtering unit, the liquid outlet hole 8 is communicated with the filtering chamber 7 through the corresponding side of the liquid outlet hole 5, the high-pressure air current penetrates through a filter cake in the filtering frame 2 inside the filtering chamber 7 and takes away moisture, then the high-pressure air current enters the filtering chamber 7 on the other side, the air current is communicated with the blind flow hole 6 on the other side through the corresponding liquid outlet hole 5 through the drain hole 8 on the other side, and then moisture in the air current is discharged, so that the air drying purpose is achieved.
In the concrete application process, in order to ensure that the filter cake completely falls off, the upper process of the frame inside the filter frame 2 is uniformly inclined to one side, the filter surface on one side is not shown in the figure, and then the filter surface on one side is larger than the filter surface on the other side, and in the unloading process, the filter frame 2 can be inclined to one side with a large filter surface, so that the filter cake can fall off quickly.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, which is to be construed as limited by the appended claims.
Claims (10)
1. A combined filter plate and filter frame is characterized in that the combined filter plate and filter frame is composed of a filter plate and a filter frame which are combined into a group,
the middle of the filter plate is provided with a core plate;
the method comprises the following steps that a filter plate outer spanning lug is arranged, the filter plate outer spanning lug is arranged at the upper corner part and the lower corner part of two sides of a filter plate, and at least one feeding channel is correspondingly arranged at the two upper corner parts of the filter plate outer spanning lug;
arranging a hidden flow hole, wherein the hidden flow hole on the filter plate is correspondingly arranged on the outer cross ears of the filter plate at the two lower corners of the filter plate;
the filter plate is provided with liquid outlet holes which are correspondingly arranged at the left lower corner and the right lower corner of the filter plate, the left liquid outlet hole of the filter plate is connected with a left blind flow hole, and the right liquid outlet hole of the filter plate is connected with a right blind flow hole;
the filter plate is characterized in that liquid discharge holes are arranged, two filter chambers of the filter plate are provided with two groups of liquid discharge holes in one-to-one correspondence, the two groups of liquid discharge holes are arranged at the lower corners of the left side and the right side of each filter chamber, the liquid discharge hole on the left side is connected with the liquid outlet hole on the left side, and the liquid discharge hole on the right side is connected with the liquid outlet hole;
the middle of the filter frame is hollow,
arranging filter frame outer cross lugs, wherein the filter frame outer cross lugs are arranged at the upper corners and the lower corners of two sides of the filter frame, and one or two feeding channels are correspondingly arranged at the two upper corners of the filter frame outer cross lugs;
the filter frame is provided with a feeding channel, a filter frame and a plurality of filter holes, wherein the feeding channel is arranged on the side surface of the filter frame;
arranging dark flow holes, wherein the dark flow holes on the filter frame are correspondingly arranged on the filter frame outer cross ears at the two lower corners of the filter frame;
and rubber sealing rings are arranged on the side surfaces of the feeding channel and the dark flow hole of the filter plate and the filter frame respectively.
2. A modular filter plate frame according to claim 1, wherein: the filter plate and the filter frame are combined into a set of filter unit, the filter plate and the filter frame are mutually matched and connected into a set, a feeding channel on the filter plate and a feeding channel on the filter frame are correspondingly matched and communicated, and a blind flow hole on the filter plate and a blind flow hole on the filter frame are correspondingly matched and communicated.
3. A modular filter plate frame according to claim 1, wherein: the edge of the inner frame at the two sides of the filter frame is provided with a convex surface table which is matched with the edge of the filter chamber corresponding to the filter plate.
4. A modular filter plate frame according to claim 1, wherein: the rubber sealing rings are arranged on two sides of the filter frame or on two sides of the filter plate or on one side of the filter plate corresponding to the filter frame.
5. The modular filter plate and filter frame of any of claims 1 to 4, wherein: the filter plate and the filter frame are provided with one or more groups of grooves and convex grooves at corresponding positions of the pressure surfaces, and the grooves are matched with the convex grooves.
6. The modular filter plate and filter frame of any of claims 1 to 4, wherein: the inside downside in straining frame center be equipped with the elasticity extrusion body, the elasticity extrusion body be the rubber bag, inside extrusion mode is spring compression form or aerifys atmospheric pressure form, inside this elasticity extrusion body is fixed in straining frame, the extrusion of elasticity extrusion body effort mainly towards the filter chamber direction, the below length of this elasticity extrusion body is not more than straining frame inward flange length.
7. The modular filter plate and filter frame of any of claims 1 to 4, wherein: the filter plate is assembled by adopting a lattice support frame and a module mode.
8. The modular filter plate and filter frame of any of claims 1 to 4, wherein: the filter plate is provided with a diaphragm die piece with a shape matched with the filter plate, a liquid inlet channel is arranged on the filter plate, one end of the liquid inlet channel is communicated with a containing cavity between the diaphragm and the filter plate, a tympanic membrane feeding channel is arranged and connected with the liquid inlet channel, and the diaphragm die piece is made of ethylene propylene diene monomer.
9. The modular filter plate and filter frame of any of claims 1 to 4, wherein: the filter plate and the filter frame are square or isosceles trapezoid, and the outer span lugs of the filter plate and the outer span lugs of the filter frame are respectively arranged on two sides of the trapezoid.
10. The modular filter plate and filter frame of any of claims 1 to 4, wherein: the thickness H of the filter frame is larger than the thickness of the corresponding filter plate, a support table is arranged inside the filter chamber corresponding to the filter plate, the height of the support table is higher than the pressure surface H/2 of the filter plate, and reinforcing ribs are arranged inside the filter frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921317228.8U CN211302194U (en) | 2019-08-14 | 2019-08-14 | Combined filter plate and filter frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921317228.8U CN211302194U (en) | 2019-08-14 | 2019-08-14 | Combined filter plate and filter frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211302194U true CN211302194U (en) | 2020-08-21 |
Family
ID=72051137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921317228.8U Expired - Fee Related CN211302194U (en) | 2019-08-14 | 2019-08-14 | Combined filter plate and filter frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211302194U (en) |
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2019
- 2019-08-14 CN CN201921317228.8U patent/CN211302194U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200821 Termination date: 20210814 |