CN217794728U - Continuous sand filter - Google Patents
Continuous sand filter Download PDFInfo
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- CN217794728U CN217794728U CN202221484759.8U CN202221484759U CN217794728U CN 217794728 U CN217794728 U CN 217794728U CN 202221484759 U CN202221484759 U CN 202221484759U CN 217794728 U CN217794728 U CN 217794728U
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Abstract
The utility model provides a continuous type sand filtration device relates to the advanced treatment of reclaimed water technical field. The utility model discloses at the internal packing precoat that filters of jar, at the in-process of filtering the raw water, through the leading-in raw water of water-locator, colloidal particle, suspended solid in the raw water then adhere to the filter material superficial layer when the pore of precoat is crossed along with sewage, and the sewage that passes the precoat arrives triangle weir department after the upflow becomes the clear water and is collected, then discharge through the clear water discharge pipe. The sand layer in the filter material layer holding the raw water dirt slowly slides downwards, enters the sand guide pipe after passing through the sand falling head and the sand lifting head, is violently stirred by blowing and washing compressed air in the sand guide pipe, peels off the dirt adhered to the surface of the filter material layer, and then falls into the sand bed of the filter material layer after being rinsed by the upflow clear water in the sand washing tank, so that the raw water purification can be carried out, and the filter material can be cleaned. The problems that the existing sand filtering device has single function, needs to be shut down for backwashing and is complex in operation but not ideal in filtering effect are solved.
Description
Technical Field
The utility model relates to a regeneration water advanced treatment technology field, concretely relates to continuous type sand filter equipment.
Background
The filtering device is a key device in the reclaimed water treatment process, and the operating effect of the filtering device is directly related to the treatment effect of reclaimed water. With the continuous improvement of the quality standard of the reclaimed water treatment, the requirements of water quality with various purposes on the content of suspended matters are gradually improved, which also promotes the continuous updating and iteration of the functions of the conventional filtering device.
The conventional filtering apparatus is generally constructed by using a plant type filtering tank, filling a filtering material layer therein, and then filtering raw water. On the basis, related personnel propose various assumptions and improvements on the internal structure, the operation mode, the combination mode and the like of the conventional filter device, but the actual application effect, the operation mode, the operation convenience and the like still do not reach the ideal state, and the obvious problems are that the conventional filter device is easy to harden and penetrate when processing the raw water of the regenerated water with higher viscosity, small suspended solid particle size and high suspended matter content, the conventional filter device has high resistance during back washing, poor filter material regeneration effect, discontinuous filtration process, substandard effluent quality after filtration, short service life of the filter material, filter material loss or the problem of needing matched standby equipment.
Therefore, a sand filter device with comprehensive functions, simple structure, easy operation and good filtering effect is needed to solve the above problems in the prior art.
Disclosure of Invention
Technical problem to be solved
Not enough to prior art, the utility model provides a continuous type sand filtration device has solved current sand filtration device and has had the function singleness, need shut down the backwash, operate the complicated but unsatisfactory problem of filter effect.
(II) technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
the utility model provides a continuous type sand filtration device, the device includes:
a sand lifting head, a clear water discharge pipe, a sand guide pipe, a sand collector, a triangular weir, a sewage discharge pipe, a sand washing cylinder, a tank body, a filter material layer, a water distributor and a sand falling head;
the tank body is divided into a cylinder upper part and a cone lower part which is matched and connected with the cylinder upper part;
the lower end of the lower part of the cone is fixedly connected with the shakeout head; one end of the sand lifting head is communicated with the shakeout head, and the other end of the sand lifting head is connected with a sand inlet of the sand guide pipe; a sand outlet port of the sand guide pipe sequentially penetrates through a reserved port on the upper part of the column body and a reserved port on the sand collector and then extends into the sand collector; the sand collector is embedded in the top end of the upper part of the column body; the lower end of the sand collector is provided with a sand washing cylinder; a sewage drainage pipe communicated with the side surface of the sand collector penetrates out of the side surface of the upper part of the column body, a triangular weir is arranged on the inner wall of the upper end of the upper part of the column body, and a clear water drainage pipe arranged at the lower end of the triangular weir penetrates out of the side surface of the upper part of the column body;
the lower end of the upper part of the column body is provided with a water distributor which is fixed on the inner wall of the lower end of the upper part of the column body, and the water inlet end of the water distributor penetrates through the outer wall of the upper part of the column body and extends;
filter material layers are filled in the upper part of the column body and the lower part of the cone;
the sand washing cylinder comprises an outer cylinder barrel, an inner cylinder barrel and annular flow deflectors, wherein the inner cylinder barrel and the outer cylinder barrel are arranged at intervals of a certain gap, and the annular flow deflectors are fixed on the inner side wall of the outer cylinder barrel and the outer side wall of the inner cylinder barrel and are arranged obliquely in a staggered mode.
Preferably, the upper part of the cylinder is a cylinder, and the lower part of the cone is a cone.
Preferably, the sand extracting head is externally connected with an air compressor.
Preferably, the water distributor comprises annular water distribution pipes which are arranged in an annular mode and are arranged at equal intervals and radial water distribution pipes which are arranged at equal intervals, and water outlet holes are arranged on one sides, close to the lower portion of the cone, of the annular water distribution pipes and the radial water distribution pipes in a staggered and equal interval mode.
Preferably, the device also comprises an umbrella-shaped sand guide hopper, and the sand guide hopper is fixed at the lower end of the center of the water distributor.
Preferably, the device further comprises a detachable access door arranged on the shakeout head.
Preferably, the filter material layer is quartz sand and ceramsite.
Preferably, the sand guide pipe is a PE pipe or a UPVC pipe.
Preferably, the annular guide vane is arranged at an angle of 45 degrees downwards.
Preferably, the upper part of the cylinder and the lower part of the cone are integrally formed.
(III) advantageous effects
The utility model provides a continuous sand filtration device. Compared with the prior art, the method has the following beneficial effects:
the utility model discloses a continuous type sand filter can purify the raw water, can realize carrying out abluent purpose to the filter material under the prerequisite of not shutting down, not utilizing complicated peripheral hardware simultaneously, has prevented that the filter material layer is unclean and makes the water suffer secondary pollution's problem, can let the cleaning performance of regeneration water show more. The utility model discloses a continuous type sand filter device is comprehensive, convenient operation is swift and the filter effect ideal in function on the whole.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a continuous sand filtration apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a sand washing cylinder in an embodiment of the present invention;
FIG. 3 is a schematic structural view of a water distributor according to an embodiment of the present invention;
in the figure: 1-a sand extraction head; 2-clear water discharge pipe; 3-a sand guide pipe; 4-a sand collector; 5-a triangular weir; 6-sewage drain pipe; 7-washing the sand cylinder; 701-an outer cylinder barrel; 702-an inner cylinder; 703-annular flow deflectors; 8-tank body; 81-column upper part; 82-lower part of cone; 9-a filter material layer; 10-a water distributor; 101-annular water distribution pipes; 102-radial water distribution pipe; 103-water outlet; 11-a knockout head; 12-a sand guide hopper.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the application provides a continuous type sand filtering device, has solved current sand filtering device and has had the problem that the function is single, the operation is complicated but the filter effect is unsatisfactory, has realized through convenient operation alright obtain the purpose of the recycled water of effect ideal.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
in order to solve the problems of single function, complex operation and unsatisfactory filtering effect of the existing sand filtering device, the technical scheme is that a filter material layer is filled in a tank body, raw water is introduced through a water distributor in the process of filtering the raw water, colloid particles and suspended matters in the raw water are adhered to the surface layer of the filter material when passing through pores of the filter material layer along with sewage, and the sewage passing through the filter material layer flows upwards to be changed into clear water and then reaches a triangular weir to be collected, and then is discharged through a clear water discharge pipe. The sand layer in the filter material layer intercepting the raw water dirt slowly slides downwards, enters the sand guide pipe after passing through the sand falling head and the sand lifting head, is vigorously stirred by blowing and washing compressed air in the sand guide pipe, peels off the dirt adhered to the surface of the filter material layer, and then falls into the sand bed of the filter material layer after being rinsed by the upward-flowing clean water in the sand washing tank, so that the raw water purification can be carried out, and the filter material can be cleaned.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example 1:
the present embodiment proposes a continuous sand filtration device, see fig. 1, comprising:
the sand-removing device comprises a sand-lifting head 1, a clear water discharge pipe 2, a sand guide pipe 3, a sand collector 4, a triangular weir 5, a sewage drain pipe 6, a sand washing cylinder 7, a tank body 8, a filter material layer 9, a water distributor 10 and a sand-falling head 11;
the tank body 8 is divided into a column upper part 81 and a cone lower part 82 which is matched and connected with the column upper part 81;
the lower end of the lower cone part 82 is fixedly connected with the knockout head 11; one end of the sand lifting head 1 is communicated with the sand falling head 11, and the other end of the sand lifting head is communicated with the sand inlet port of the sand guide pipe 3; a sand outlet of the sand guide pipe 3 sequentially penetrates through a reserved opening in the upper part 81 of the column body and a reserved opening in the sand collector 4 and then extends into the sand collector 4; the sand collector 4 is embedded at the top end of the upper part 81 of the column body; the lower end of the sand collector 4 is provided with a sand washing cylinder 7; a sewage drain pipe 6 communicated with the side surface of the sand collector 4 penetrates out of the side surface of the upper part 81 of the column body, a triangular weir 5 is arranged on the inner wall of the upper end of the upper part 81 of the column body, and a clear water discharge pipe 2 arranged at the lower end of the triangular weir 5 penetrates out of the side surface of the upper part 81 of the column body;
the lower end of the upper part 81 of the column is provided with a water distributor 10, the water distributor 10 is fixed on the inner wall of the lower end of the upper part 81 of the column, and the water inlet end of the water distributor 10 penetrates out of the outer wall of the upper part 81 of the column and extends;
the upper part 81 of the column and the lower part 82 of the cone are filled with a filter material layer 9;
the sand washing cylinder 7 comprises an outer cylinder 701, an inner cylinder 702 arranged at a certain interval with the outer cylinder 701, and annular guide vanes 703 fixed on the inner side wall of the outer cylinder 701 and the outer side wall of the inner cylinder 702 and arranged obliquely in a staggered manner.
It can be seen that the continuous type sand filter device of this embodiment can purify the raw water, can realize carrying out abluent purpose to the filter material under the prerequisite of not shutting down, not utilizing complicated peripheral hardware simultaneously, has prevented that the filter material layer is unclean and makes the water suffer secondary pollution's problem, can let the cleaning performance of regeneration water show more. The utility model discloses a continuous type sand filter device is comprehensive, convenient operation is swift and the filter effect ideal in function on the whole.
The following will explain in detail the principle of the continuous sand filtration system according to the present embodiment with reference to fig. 1-3 and the explanation of the specific structure. Referring to fig. 1, the continuous sand filtering apparatus of the present embodiment includes:
the sand-removing device comprises a sand-lifting head 1, a clear water discharge pipe 2, a sand guide pipe 3, a sand collector 4, a triangular weir 5, a sewage drain pipe 6, a sand washing cylinder 7, a tank body 8, a filter material layer 9, a water distributor 10 and a sand-falling head 11.
The tank 8 is divided into a column upper part 81 and a vertebral body lower part 82 which is matched and connected with the column upper part 81. Generally, the upper cylinder 81 can be a cylinder, a truncated cone or a prism, and the corresponding lower cone 82 can be a cone or a pyramid, but is not limited to the above-mentioned structures. In the present embodiment, the upper cylinder portion 81 is selected to be a cylinder, and the corresponding lower cone portion 82 is a cone, which is an inverted cone connected to the lower end of the cylinder. In addition, the upper cylinder part 81 and the lower cone part 82 may be integrally formed or may be fixedly connected to each other when they are connected to each other.
The lower end (i.e. the cone tip) of the cone lower part 82 is fixedly connected with the shakeout head 11, and a detachable access door can be arranged at a suitable position on the shakeout head 11 for the convenience of later-stage maintenance.
One end of the sand lifting head 1 is connected with the sand falling head 12 in a through manner, and the other end is connected with the sand inlet of the sand guide pipe 3 in a through manner. Carry the external air compressor of sand head 1, with the leading-in sand pipe 3 of compressed air, through the compressed air who inserts, utilize strong stirring mode between compressed air, water, the filter material three to break up and lead the filth of adhesion on the filter material surface in the sand pipe 3 on the one hand, on the other hand, will receive the sand bed that receives the pollution and promote to the collection sand ware 4 that jar body 8 upper end set up through leading sand pipe 3 under the compressed air effect.
The sand outlet of the sand guide pipe 3 sequentially penetrates through the reserved opening on the upper part 81 of the column body and the reserved opening on the sand collector 4 and then extends into the sand collector 4. In this embodiment, the sand guiding pipe 3 is a PE pipe or a UPVC pipe, etc. with good plasticity.
The sand trap 4 is embedded in the top end of the upper part 81 of the column, and one half is embedded in the center of the top end of the upper part 81 of the column. The lower end of the sand collector 4 is provided with a sand washing cylinder 7, and referring to fig. 2, the sand washing cylinder 7 comprises an outer cylinder 701, an inner cylinder 702 arranged at a certain interval with the outer cylinder 701, and annular deflectors 703 fixed on the inner side wall of the outer cylinder 701 and the outer side wall of the inner cylinder 702 in a staggered and inclined manner. In this embodiment, when the annular flow deflector 703 is disposed on the inner sidewall of the outer cylinder 701 and the outer sidewall of the inner cylinder 702 in a staggered and inclined manner, in order to obtain a better filtering material cleaning effect, the annular flow deflector 703 is disposed at 45 ° below the outer sidewall, so that the water purified by the filtering material layer 9 flows upward in an S-shape, the sand slides downward in an S-shape, the water and the sand form a cross flow, and the cleaned sand returns to the filtering material layer 9.
In addition, a sewage drain pipe 6 is communicated with the side surface of the sand collector 4, and the sewage drain pipe 6 penetrates out of a reserved opening on the side surface of the upper part 81 of the column body and is used for discharging the sand washing sewage after the filter material is cleaned out of the tank body 8. And the inner wall of the upper end of the upper part 81 of the column body is also provided with a triangular weir 5 for collecting the redundant clear water which rises to the position. The triangular weir 5 is fixed on the inner side wall of the upper part 81 of the column, and in order to discharge the clean water, a clean water discharge pipe 2 for discharging the clean water is generally arranged at the bottom of the triangular weir 5 near the side wall of the upper part 81 of the column, and the clean water discharge pipe 2 penetrates out from the side reserved opening of the upper part 81 of the column.
In order to guide the raw water to be filtered into the sand filtering device, a water distributor 10 is provided at a suitable position of the lower end of the upper part 81 of the column. The water distributor 10 is fixed on the inner wall of the lower end of the upper part 81 of the column, and the water inlet end of the water distributor 10 penetrates through the outer wall of the upper part 81 of the column and extends out for connecting with a pipeline for inputting raw water so as to input raw water. In this embodiment, for better guiding raw water, referring to fig. 3, the water distributor 10 is designed to include annular water distribution pipes 101 arranged at equal intervals and radial water distribution pipes 102 arranged at equal intervals, and water outlet holes 103 are arranged in a staggered and equal interval manner on one side of the lower portions of the annular water distribution pipes 101 and the radial water distribution pipes 102 close to the lower portion 82 of the cone, generally speaking, a plurality of water outlet holes 103 are arranged in a staggered and equal interval manner on the lower portions of two sides of 45 ° of the annular water distribution pipes 101 and the radial water distribution pipes 102, so that the water distribution effect of the continuous sand filtration device in the filter bed can be more remarkable while preventing the filter material from flowing into the water distributor 10 to block the pipeline.
The upper cylinder part 81 and the lower cone part 82 are filled with a filter material layer 9 with a certain height according to actual needs. The filter material layer 9 can be quartz sand or ceramsite according to actual needs, but includes but is not limited to the two filter materials. In addition, in order to facilitate the filter material to move down uniformly, the sand filtration device further comprises an umbrella-shaped sand guide hopper 12, and the sand guide hopper 12 is fixed at the center of the water distributor 10.
The working principle of the continuous sand filtering device in the embodiment is as follows: when the filter material layer 9 in the tank 8 filters raw water, raw water is introduced through the water inlet of the water distributor 10, colloid particles and suspended matters in the raw water are introduced into the sand filter device through the water distributor 10 along with sewage and flow through the pores of the filter material layer 9, the colloid particles or the suspended matters are adhered to the surface layer of the filter material at the moment, the sewage passing through the filter material layer 9 flows upwards, and the cleaned water reaches the triangular weir 5 to be collected and then is discharged through the clear water discharge pipe 2. The sand layer in the filter material layer 9 intercepting the original water dirt slowly slides downwards, enters the sand guide pipe 3 after passing through the sand falling head 11 and the sand lifting head 1, is violently stirred by blowing and washing compressed air in the sand guide pipe 3, peels off the dirt adhered to the surface of the filter material layer, and then falls into the sand bed of the filter material layer 9 after being rinsed by the clean water flowing upwards in the sand washing cylinder 7.
The utility model discloses a continuous type sand filter can purify the raw water, can realize carrying out abluent purpose to the filter material under the prerequisite of not shutting down, not utilizing complicated peripheral hardware simultaneously, has prevented that the filter material layer is unclean and make the water suffer secondary pollution's problem, can let the cleaning performance of regeneration water show more. The utility model discloses a continuous type sand filtration device is comprehensive, convenient operation is swift and the filter effect ideal in function on the whole.
In summary, compared with the prior art, the method has the following beneficial effects:
1. the utility model discloses a continuous type sand filter can purify the raw water, can realize carrying out abluent purpose to the filter material under the prerequisite of not shutting down, not utilizing complicated peripheral hardware simultaneously, has prevented that the filter material layer is unclean and makes the water suffer secondary pollution's problem, can let the cleaning performance of regeneration water show more. The utility model discloses a continuous type sand filter device is comprehensive, convenient operation is swift and the filter effect ideal in function on the whole.
2. The utility model discloses a continuous type sand filter is through at the internal water-locator that sets up of jar, and sets up the water-locator into dividing the ring-type arrangement, the hoop water distributor of equidistance, radial water distributor to 45 crisscross equidistance below the both sides of hoop water distributor, radial water distributor have arranged the apopore, can prevent that the filter material from flowing into the inside water distributor that blocks up the pipeline when, let the water distribution effect of continuous sand filter in the filter bed show more.
3. The utility model discloses a continuous type sand filter device carries the sand head and inserts compressed air through the setting, with filter material, compressed air, water three after violently stirring in leading the sand pipe earlier for the cleaning performance of filter material is showing more.
4. The utility model discloses a continuous type sand filtration device is through giving jar internal setting washing sand jar to the setting is washed sand jar and is set up crisscross 45 annular water deflectors down to one side by outer cylinder and the certain clearance of inner cylinder interval, simultaneously at outer cylinder and inner cylinder relevant position equidistance setting, forms water and sand and is the state of cross-flow form, makes the filter bed of material is got back to the abluent sand, and the sewage that the washing sand produced is discharged through washing sand water discharge pipe.
5. The utility model discloses a continuous type sand filter sets up flange joint's knockout head through the cone lower part at the jar body to offer the detachable access door in knockout head department, make continuous sand filter operation maintenance more convenient, the effect is showing more.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A continuous sand screen apparatus, the apparatus comprising:
a sand lifting head (1), a clear water discharge pipe (2), a sand guide pipe (3), a sand collector (4), a triangular weir (5), a sewage drain pipe (6), a sand washing cylinder (7), a tank body (8), a filter material layer (9), a water distributor (10) and a sand falling head (11);
the tank body (8) is divided into a cylinder upper part (81) and a cone lower part (82) which is matched and connected with the cylinder upper part (81);
the lower end of the lower part (82) of the cone is fixedly connected with the sand falling head (11); one end of the sand extracting head (1) is communicated with the sand shakeout head (11), and the other end of the sand extracting head is connected with a sand inlet port of the sand guide pipe (3); a sand outlet port of the sand guide pipe (3) sequentially penetrates through a reserved port on the upper part (81) of the column body and a reserved port on the sand collector (4) and then extends into the sand collector (4); the sand collector (4) is embedded at the top end of the upper part (81) of the column body; the lower end of the sand collector (4) is provided with a sand washing cylinder (7); a sewage drain pipe (6) communicated with the side surface of the sand collector (4) penetrates out of the side surface of the upper part (81) of the column body, a triangular weir (5) is arranged on the inner wall of the upper end of the upper part (81) of the column body, and a clear water discharge pipe (2) arranged at the lower end of the triangular weir (5) penetrates out of the side surface of the upper part (81) of the column body;
the lower end of the upper part (81) of the column is provided with a water distributor (10), the water distributor (10) is fixed on the inner wall of the lower end of the upper part (81) of the column, and the water inlet end of the water distributor (10) penetrates through the outer wall of the upper part (81) of the column and extends;
the upper part (81) of the column body and the lower part (82) of the cone body are filled with a filter material layer (9);
the sand washing cylinder (7) comprises an outer cylinder barrel (701), an inner cylinder barrel (702) and annular guide vanes (703), wherein the inner cylinder barrel (702) is arranged at a certain interval with the outer cylinder barrel (701), and the annular guide vanes (703) are fixed on the inner side wall of the outer cylinder barrel (701) and the outer side wall of the inner cylinder barrel (702) and are arranged obliquely in a staggered mode.
2. The device according to claim 1, characterized in that the upper part (81) of the cylinder is a cylinder and the lower part (82) of the cone is a cone.
3. The device according to claim 1, characterized in that the sand head (1) is externally connected with an air compressor.
4. The device according to claim 1, characterized in that the water distributor (10) comprises annular arranged and equidistantly arranged circular water distribution pipes (101) and equidistantly arranged radial water distribution pipes (102), and water outlet holes (103) are staggered and equidistantly arranged on the sides of the circular water distribution pipes (101) and the radial water distribution pipes (102) close to the lower part (82) of the cone.
5. The device according to claim 1, characterized in that the device further comprises an umbrella-shaped sand guide hopper (12), and the sand guide hopper (12) is fixed at the lower end of the center of the water distributor (10).
6. The apparatus according to claim 1, characterized in that it further comprises a removable access door provided on the shakeout head (11).
7. The device according to claim 1, characterized in that the filter material layer (9) is quartz sand or ceramsite.
8. The device according to claim 1, characterized in that the sand guide pipe (3) is a PE pipe or a UPVC pipe.
9. The device according to claim 1, characterized in that the annular guide vanes (703) are arranged 45 ° down.
10. The device according to claim 2, characterized in that the upper cylinder part (81) and the lower cone part (82) are of integrally formed design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221484759.8U CN217794728U (en) | 2022-06-14 | 2022-06-14 | Continuous sand filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221484759.8U CN217794728U (en) | 2022-06-14 | 2022-06-14 | Continuous sand filter |
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| Publication Number | Publication Date |
|---|---|
| CN217794728U true CN217794728U (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221484759.8U Active CN217794728U (en) | 2022-06-14 | 2022-06-14 | Continuous sand filter |
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| CN (1) | CN217794728U (en) |
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2022
- 2022-06-14 CN CN202221484759.8U patent/CN217794728U/en active Active
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