CN212283195U

CN212283195U - Water purifying device

Info

Publication number: CN212283195U
Application number: CN202020790852.6U
Authority: CN
Inventors: 仝军
Original assignee: Nanjing Norrup Environmental Protection Technology Co ltd
Current assignee: Nanjing Norrup Environmental Protection Technology Co ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2021-01-05
Anticipated expiration: 2030-05-13

Abstract

The utility model discloses a water purifying device, relating to the technical field of water treatment. The device includes that cylindric casing, a plurality of inlet tubes, the sediment of the middle hourglass hopper-shaped whirl husky district, casing bottom of casing are removed husky district, whirl husky district intercommunication inlet tube that removes, the lower extreme intercommunication sediment husky district that removes of whirl is arranged husky district, the microstrainer is located the top that the whirl removed husky district, microstrainer intercommunication whirl removes husky district, be the purifying area around microstrainer and the whirl removed husky district, be equipped with first annular water-locator in the purifying area, microstrainer intercommunication first annular water-locator, the top of casing is the buffer memory, buffer memory and purifying area intercommunication, the final filter is located the buffer memory, final filter intercommunication. The utility model discloses can carry out 5 purifications to water, simultaneously, effectively collect the impurity that the vortex flow filtered out, and can prevent that the sedimentation zone from piling up the jam, simple structure purifies the high efficiency.

Description

Water purifying device

Technical Field

The utility model belongs to the technical field of water treatment, especially, relate to a purifier.

Background

At present, most of water bodies are increasingly polluted, the contradiction of water resource shortage is continuously intensified, the traditional tap water treatment method cannot guarantee the supply of drinking water with excellent quality, and the water cited for a long time is not very sanitary. More importantly, the population proportion of people in rural areas in China is large, but the rural underground water quality is poorer and poorer at the industrialization and urbanization steps, the disease rate of people in rural areas is higher and higher, for example, cancer villages and rural areas are different from cities, most of the rural areas are taken by water pumps to serve as drinking water, professional filtering and detecting equipment is not provided, the water quality cannot be accurately guaranteed when the people are taken and drunk at any time, the rural underground water contains silt, bacteria and heavy metals harmful to human bodies, and even if the underground water is polluted, the people cannot be found in time.

Although a lot of existing water purifiers exist, most of the water purifiers are not sufficient in filtering and purifying degree, or too large in size, limited in water storage and low in purifying speed. Particularly, a large amount of sand and stone and other granular impurities exist in drinking water in rural areas, and although the existing water purifier can effectively remove the impurities, the internal granular impurity deposition area is easy to block, or the structure of the granular impurity deposition area has defects, so that the impurities are difficult to discharge completely when being discharged, and the problem of bacterial breeding and the like in the granular impurity deposition area is caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the existing problem, the utility model provides a water purifying device, this water purifying device can carry out filtration purification many times to water, simultaneously, carry out effectual collection to impurity such as the large granule gravel and sand that the whirl filtered out to can prevent that the sedimentation zone from piling up the jam, simple structure purifies the high efficiency.

In order to achieve the above purpose, the utility model adopts the following scheme,

a water purifying device comprises a cylindrical shell, wherein a water inlet, a water outlet, a sand flushing water inlet, a sand discharging port, a flushing water inlet, a flushing water outlet, a material changing water inlet and a material changing water outlet are formed in the shell, and the shell of the water purifying device is internally divided into a sand removing part and a filtering and purifying part;

the sand removing part comprises a plurality of water inlet pipes, a funnel-shaped rotational flow sand removing area in the middle of the shell and a sediment sand discharging area at the bottom of the shell, the water inlet pipes are communicated with the water inlet and the rotational flow sand removing area, the center of the upper part of the rotational flow sand removing area is provided with a central column pipe, the lower end of the rotational flow sand removing area is communicated with a sand discharging pipe, and the lower end of the sand discharging pipe is communicated with the sediment sand discharging area;

the filtering and purifying part comprises a micro-filtering area, a purifying area, a buffer area, a final filtering area and a plurality of water outlet pipes, the micro-filtering area is positioned above the rotational flow sand removing area, the micro-filtering area is communicated with the rotational flow sand removing area through a central column pipe, the micro-filtering area is provided with a plurality of stainless steel filter elements, and a central pipe is arranged in each stainless steel filter element; the inside first annular water-locator of center tube intercommunication of stainless steel filter core, purification zone intercommunication refuel water inlet and the delivery port of reloading, the top of casing is the buffer memory, buffer memory and purification zone intercommunication, final filter memory is located the buffer memory, the inside stainless steel filter bag that is equipped with of final filter memory, the stainless steel filter bag passes through pipeline intercommunication buffer memory, final filter memory passes through outlet pipe intercommunication delivery port.

Furthermore, the water inlet pipe is divided into a straight line section and a bent section, the bent section is located inside the rotational flow sand removing area, and the bent section is arc-shaped.

Still further, the number of inlet tube is two, and two inlet tubes are central symmetry, and two inlet tubes are highly different.

Furthermore, a sand screen is arranged inside the upper end of the central column tube.

Furthermore, be equipped with circular cone lug in the middle of sediment region of arranging the sand bottom, circular cone lug is located the below of going out the husky pipe, sediment region of arranging the sand bottom edge is equipped with annular side slope, sediment region of arranging the sand bottom still is equipped with the annular sand discharge pipe that the cross-section is the shape of falling the trapezoid, it has first annular fine joint of advancing to open above the annular sand discharge pipe, annular sand discharge pipe is located between circular cone lug and the annular side slope.

Furthermore, the inside of annular sand discharge pipe is equipped with the annular and prevents stifled pipe, the bottom of annular prevents stifled pipe is opened has the sand slit of second ring-shaped income, annular sand discharge pipe and annular prevent stifled pipe pass through pipeline intercommunication towards husky water inlet and row's sand mouth.

Furthermore, a plurality of sand inlet holes are formed in the annular sand discharge pipe at equal intervals on the circumference.

Further, sediment region of arranging sand is equipped with the blow off pipe, the blow off pipe intercommunication washes delivery port and clean area bottom.

Further, the annular outer wall downwardly extending of microstrainer district will purification zone divides into down purifies the layer and goes upward purifies the layer, first annular water-locator is established in the upper end that purifies the layer down, down purify the lower extreme on layer and go upward the lower extreme on purifying the layer and communicate each other, it purifies the upper end intercommunication buffer memory of layer to go upward.

Furthermore, a second annular water distributor is arranged in the cache region and is communicated with the flushing water inlet through a pipeline.

The utility model discloses a water purification theory of operation: during water purification, a sand removing part: only opening a water inlet and a water outlet, enabling raw water to be purified to enter a rotational flow sand removal area from a water inlet pipe, enabling water in the rotational flow sand removal area to be in a rotational flow state under the action of the water inlet pipe and water pressure, enabling large-particle impurities such as sand and stone in the water to enter a sediment sand discharge area through a sand outlet pipe under the rotational flow effect, enabling the impurities such as sand and stone to be uniformly accumulated on an annular sand discharge pipe in a circumferential shape under the action of a conical bump, enabling the impurities such as sand and stone to enter the annular sand discharge pipe through a first annular sand inlet slit and a sand inlet hole, and enabling the impurities such as sand and stone to enter an annular anti-blocking circular pipe through a second annular sand;

a filtering and purifying part: after cyclone sand removal, water enters a micro-filtration area from a central column pipe through a sand filtration net, then enters a first annular water distributor through a stainless steel filter element for filtration, then the water in the first annular water distributor is uniformly distributed at the upper end of a downstream purification layer, the water descends in the downstream purification layer, then ascends from the lower end of an upstream purification layer until entering a cache area, after the cache area is filled with the water, the water enters a stainless steel filter bag of a final filtration area, and clean water is discharged through a water outlet pipe after filtration;

when the sediment and sand discharge area is cleaned, only the sand flushing water inlet and the sand discharge opening are opened, and flushing water enters from the sand flushing water inlet to discharge impurities such as sand and stones from the sand discharge opening.

Wash the purification area, only open and wash the water inlet and wash the delivery port, the sparge water gets into to second annular water-locator from washing the water inlet, then gets into buffer memory and purification area in proper order, because during aqueous cleaning, down purify intraformational underwater going, impurity is difficult for depositing or the stock volume is very little, therefore impurity mainly exists in the purification layer that goes upward, then the purification medium that goes upward in the clean purification area of sparge water purifies the layer, then the sparge water carries impurity entering blow off pipe, discharge from washing the delivery port again.

The utility model has the advantages that:

(1) the water purifying device of the utility model can be used for users after continuous 5 times of treatments such as cyclone sand removal, sand filtering net filtration, stainless steel filter element filtration, medium purification and stainless steel filter bag filtration are carried out on raw water in sequence, and the water purifying effect is good;

(2) the water purifying device of the utility model separates the shell, fully utilizes the space, has small volume and simple structure, and is convenient for transportation and distribution;

(3) the operation such as purifier's sand removal, water purification, medium reloading is as long as carry out the switching through the exit to on the casing and realize, and is easy and simple to handle.

(4) In the sediment and sand discharging area of the water purifying device, large-particle impurities such as sand and stone can be effectively collected due to the existence of the annular side slope of the conical lug, and the large-particle impurities are sent into the annular sand discharging pipe and then discharged by flushing water;

(5) even sediment pipe is filled up by impurity to purifier's annular row, even impurity such as gravel and sand can advance husky slit through the second ring and get into the annular and prevent stifled pipe, but because the action of gravity, the annular prevents that stifled pipe can not be filled up by impurity and blocks up, has guaranteed the smoothness of sediment outflow process.

Drawings

Fig. 1 is a schematic view of the sectional structure of the water purifying device of the present invention.

Fig. 2 is a sectional view taken along the plane a-a in fig. 1.

Fig. 3 is a sectional view taken along the plane B-B in fig. 1.

Fig. 4 is a sectional view of the ring-shaped sand discharging pipe of the water purifying device of the present invention.

In the figure: a shell body-1, a water inlet-1.1, a water outlet-1.2, a sand flushing water inlet-1.3, a sand discharging port-1.4, a flushing water inlet-1.5, a flushing water outlet-1.6, a reloading water inlet-1.7 and a reloading water outlet-1.8; a water inlet pipe-2, a straight line section-2.1 and a bent section-2.2; a rotational flow sand removal area-3, a central column pipe-3.1, a sand filtering net-3.2 and a sand outlet pipe-3.3; a sediment sand discharge area-4, a conical bump-4.1, an annular side slope-4.2, an annular sand discharge pipe-4.3, a first annular sand inlet slit-4.3.1, a sand inlet hole-4.3.2, an annular anti-blocking circular pipe-4.3.3, a second annular sand inlet slit-4.3.4 and a blow-off pipe-4.4; a microfiltration zone-5, a stainless steel filter element-5.1; a purification area-6, a descending purification layer-6.1, an ascending purification layer-6.2 and a first annular water distributor-6.3; a buffer area-7, a second annular water distributor-7.1; a final filtering area-8, a stainless steel filter bag-8.1; and (4) a water outlet pipe-9.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1-4, the technical solution of this embodiment is as follows:

a water purifying device comprises a cylindrical shell 1, wherein a water inlet 1.1, a water outlet 1.2, a sand flushing water inlet 1.3, a sand discharging port 1.4, a flushing water inlet 1.5, a flushing water outlet 1.6, a material changing water inlet 1.7 and a material changing water outlet 1.8 are arranged on the shell 1, the water inlet 1.1 and the water outlet 1.2 are provided with flanges, and similarly, the sand flushing water inlet 1.3, the sand discharging port 1.4, the flushing water inlet 1.5, the flushing water outlet 1.6, the material changing water inlet 1.7 and the material changing water outlet 1.8 can also be provided with flanges, so that the water purifying device is convenient for pipeline connection during use, and the interior of the shell 1 of the water purifying device is divided into a sand removing part and a filtering and purifying part;

the part that removes sand includes sediment row husky district 4 of the hourglass hopper-shaped whirl that a plurality of inlet tubes 2, the middle of the casing 1 sand removal district 3 and the casing 1 bottom that removes, inlet tube 2 intercommunication water inlet 1.1 and whirl remove husky district 3, inlet tube 2 divide into straightway 2.1 and bend segment 2.2, bend segment 2.2 is located the whirl and removes husky 3 insides in the district, bend segment 2.2 is circular-arcly, the number of inlet tube 2 is two, and two inlet tubes 2 are central symmetry, two inlet tubes 2's high difference. It should be noted here that the number of the inlet pipes 2 can be more than two, and the inlet pipes 2 are in an annular array centered on the center line of the central cylindrical pipe 3.1, and the heights of the inlet pipes 2 are different; it should be noted that the central line of the water inlet pipe 2 and the central line of the central column pipe 3.1 are not in the same plane, so as to ensure the generation of rotational flow when water enters. A central column pipe 3.1 is arranged at the center of the upper part of the rotational flow sand removing area 3, and a sand filtering net 3.2 is arranged inside the upper end of the central column pipe 3.1; the lower end of the rotational flow sand removing area 3 is communicated with a sand outlet pipe 3.3, and the lower end of the sand outlet pipe 3.3 is communicated with a sediment discharging area 4.

A conical lug 4.1 is arranged in the middle of the bottom of the sediment discharging area 4, and the conical lug 4.1 is positioned below the sand outlet pipe 3.3; in order to ensure that impurities such as sand and stones are uniformly distributed in the sediment and sand discharge area 4, the central line of the conical projection 4.1 is superposed with the central line of the sand outlet pipe 3.3; sediment is arranged 4 bottom edges in husky district and is equipped with annular side slope 4.2, sediment is arranged 4 bottoms in husky district and still is equipped with the annular sand discharge pipe 4.3 that the cross-section is the shape of falling the trapezoid, it has first annular sand inlet slit 4.3.1 to open above annular sand discharge pipe 4.3, annular sand discharge pipe 4.3 is located between circular cone lug 4.1 and annular side slope 4.2. The inside of annular sand discharge pipe 4.3 is equipped with the annular and prevents stifled pipe 4.3.3, the annular prevents stifled pipe 4.3.3's bottom and opens and to have the second annular to advance husky slit 4.3.4, annular sand discharge pipe 4.3 and annular prevent stifled pipe 4.3.3 and pass through pipeline intercommunication towards husky water inlet 1.3 and arrange husky mouth 1.4. A plurality of sand inlet holes 4.3.2 are equidistantly arranged on the annular sand discharge pipe 4.3 according to the circumference. The sediment draining area 4 is provided with a drain pipe 4.4, and the drain pipe 4.4 is communicated with a flushing water outlet 1.6 and the bottom of the purifying area 6. Because of the existence of the annular side slope 4.2 of the conical convex block 4.1, large particle impurities such as sand and stone fall on the annular sand discharge pipe 4.3 in an annular settlement manner, and because of the action of gravity, the large particle impurities such as sand and stone can easily pass through the sand inlet hole 4.3.2 and the first annular sand inlet slit 4.3.1 and fill up the annular sand discharge pipe, although the impurities such as sand and stone can also enter the annular anti-blocking circular pipe 4.3.3 through the second annular sand inlet slit 4.3.4, the annular anti-blocking circular pipe 4.3.3 is difficult to be filled up and blocked by the impurities due to the action of gravity, so that the smoothness of the annular anti-blocking circular pipe 4.3.3 is ensured. When the sand is discharged, even if the annular sand discharge pipe 4.3 is filled with the sand and is blocked, because the annular anti-blocking circular pipe 4.3.3 is unblocked, the washing water flows through the annular anti-blocking circular pipe 4.3.3, because the existence of the second annular sand inlet slit 4.3.4, the flowing washing water can wash and take away large particle impurities such as sand and stones in the annular sand discharge pipe 4.3, the unblocking of the annular sand discharge pipe 4.3 is gradually recovered, and similarly, the large particle impurities such as sand and stones deposited in the sediment sand discharge area 4 can be discharged.

The filtering and purifying part comprises a micro-filtering area 5, a purifying area 6, a buffer area 7, a final filtering area 8 and a plurality of water outlet pipes 9, the micro-filtering area 5 is positioned above the rotational flow sand removing area 3, the micro-filtering area 5 is communicated with the rotational flow sand removing area 3 through a central column pipe 3.1, the micro-filtering area 5 is provided with a plurality of stainless steel filter elements 5.1, and a central pipe is arranged in the stainless steel filter elements 5.1; the purification area 6 is removed around husky district 3 with the whirl in microstraining district 5, the top of casing 1 is buffer memory 7, microstraining district 5's annular outer wall downwardly extending will purification area 6 divide into down purification layer 6.1 and go upward to purify layer 6.2, first annular water-locator 6.3 is established in the upper end of purifying layer 6.1 down, purify layer 6.1's lower extreme and the lower extreme that goes upward to purify layer 6.2 and communicate each other down, the upper end intercommunication buffer memory 7 that goes upward to purify layer 6.2. The final filtering area 8 is located in the buffer area 7, a stainless steel filtering bag 8.1 is arranged inside the final filtering area 8, the stainless steel filtering bag 8.1 is communicated with the buffer area 7 through a pipeline, and the final filtering area 8 is communicated with the water outlet 1.2 through a water outlet pipe. A second annular water distributor 7.1 is arranged in the buffer area 7, and the second annular water distributor 7.1 is communicated with a flushing water inlet 1.5 through a pipeline 7.1. The direct communication positions of the purification area 6 and other parts are provided with gauze screens, so that water purification media are prevented from being discharged accidentally.

This embodiment purifier during operation:

(1) water purification: the method is characterized in that only a water inlet and a water outlet are opened, raw water to be purified enters a cyclone sand removing area 3 from a water inlet pipe, under the action of a water inlet pipe 2 and water pressure, water in the cyclone sand removing area 3 is subjected to cyclone, impurities such as large-particle sand and stone in the water enter a sediment sand discharging area 4 through a sand outlet pipe 3.3 under the action of the cyclone, the water enters a micro-filtration area 5 from a central column pipe 3.1 through a sand filtration net 3.2, then is filtered by a stainless steel filter element 5.1 and enters a first annular water distributor 6.3, then the water in the first annular water distributor 6.3 is uniformly distributed at the upper end of a lower purification layer 6.1, the water descends in the lower purification layer 6.1, then ascends from the lower end of an ascending purification layer 6.2 until the water enters a cache area 7, after the cache area 7 is filled, the water enters a stainless steel filter bag 8.1 of a final filtration area 8, and the clean water is discharged through.

In the water purification process, in the sediment sand discharging area 4, impurities such as sand and stones uniformly fall on the annular sand discharging pipe 4.3 in a circumferential shape under the action of the conical convex block 4.1, the impurities such as sand and stones can enter the annular sand discharging pipe 4.3 through the first annular sand inlet slit 4.3.1 and the sand inlet hole 4.3.2, the impurities such as sand and stones can also partially enter the annular anti-blocking circular pipe 4.3.3 through the second annular sand inlet slit 4.3.4, and when the annular sand discharging pipe 4.3 is filled, the impurities such as sand and stones are accumulated on the annular sand discharging pipe 4.3.

(2) Sand discharging: only the sand flushing water inlet 1.3 and the sand discharging port 1.4 are opened, flushing water enters from the sand flushing water inlet 1.3 and passes through the annular sand discharging pipe 4.3 and the annular anti-blocking circular pipe 4.3.3, and impurities such as sand and stones are discharged from the sand discharging port 1.4.

(3) And (3) flushing, wherein only a flushing water inlet 1.5 and a flushing water outlet 1.6 are opened, flushing water enters the second annular water distributor 7.1 from the flushing water inlet 1.5 and then sequentially enters the buffer area 7 and the purification area 6, the flushing water cleans a purification medium in the purification area 6, and then the flushing water carries impurities to enter a sewage discharge pipe 4.4 and then is discharged from the flushing water outlet 1.6.

(4) Material changing: during discharging, only the material changing water inlet 1.7 and the material changing water outlet 1.8 are opened, water is firstly introduced into the material changing water inlet 1.7, and then the water purifying medium is discharged from the material changing water outlet 1.8; when filling, only the material changing water inlet 1.7 and the flushing water outlet 1.6 are opened, and water containing a water purifying medium is introduced into the material changing water inlet 1.7 until the purifying area 6 is filled.

Claims

1. The utility model provides a water purification device, includes cylindric casing (1), be equipped with water inlet (1.1), delivery port (1.2) on casing (1), wash husky water inlet (1.3), arrange husky mouth (1.4), wash water inlet (1.5), wash delivery port (1.6), reloading water inlet (1.7) and reloading delivery port (1.8), its characterized in that: the interior of the shell (1) of the water purifying device is divided into a sand removing part and a filtering and purifying part;

the sand removing part comprises a plurality of water inlet pipes (2), a funnel-shaped rotational flow sand removing area (3) in the middle of the shell (1) and a sediment sand discharging area (4) at the bottom of the shell (1), the water inlet pipes (2) are communicated with a water inlet (1.1) and the rotational flow sand removing area (3), a central column pipe (3.1) is arranged in the center of the upper part of the rotational flow sand removing area (3), the lower end of the rotational flow sand removing area (3) is communicated with a sand discharging pipe (3.3), and the lower end of the sand discharging pipe (3.3) is communicated with the sediment sand discharging area (4);

the filtering and purifying part comprises a micro-filtering area (5), a purifying area (6), a cache area (7), a final filtering area (8) and a plurality of water outlet pipes (9), the micro-filtering area (5) is positioned above the rotational flow sand removing area (3), the micro-filtering area (5) is communicated with the rotational flow sand removing area (3) through a central column pipe (3.1), the micro-filtering area (5) is provided with a plurality of stainless steel filter elements (5.1), and a central pipe is arranged inside the stainless steel filter elements (5.1); micro-filtration district (5) and whirl remove sand around district (3) for purification district (6), be equipped with first annular water-locator (6.3) in purification district (6), the inside center tube intercommunication first annular water-locator (6.3) of stainless steel filter core (5.1), purification district (6) intercommunication reloading water inlet (1.7) and reloading delivery port (1.8), the top of casing (1) is buffer memory (7), buffer memory (7) and purification district (6) intercommunication, last filter memory (8) are located buffer memory (7), last filter memory (8) inside is equipped with stainless steel filter bag (8.1), stainless steel filter bag (8.1) is through pipeline intercommunication buffer memory (7), last filter memory (8) are through outlet pipe intercommunication delivery port (1.2).

2. The water purification apparatus of claim 1, wherein: the water inlet pipe (2) is divided into a straight line section (2.1) and a bent section (2.2), the bent section (2.2) is located inside the cyclone sand removing area (3), and the bent section (2.2) is arc-shaped.

3. A water purification apparatus as claimed in claim 1 or 2, wherein: the number of inlet tube (2) is two, and two inlet tube (2) are central symmetry, and the height of two inlet tube (2) is different.

4. The water purification apparatus of claim 1, wherein: and a sand filtering net (3.2) is arranged inside the upper end of the central column tube (3.1).

5. The water purification apparatus of claim 1, wherein: sediment is arranged and is equipped with circular cone lug (4.1) in the middle of husky district (4) bottom, circular cone lug (4.1) are located the below of a husky pipe (3.3) of play, sediment is arranged husky district (4) bottom edge and is equipped with annular side slope (4.2), sediment is arranged husky district (4) bottom and still is equipped with the cross-section and arranges husky pipe (4.3) for the annular of falling trapezoidal form, it has first annular fine joint of advancing husky (4.3.1) to open above that husky pipe (4.3) is arranged to the annular, husky pipe (4.3) are arranged to the annular and are located between circular cone lug (4.1) and annular side slope (4.2).

6. The water purification apparatus of claim 5, wherein: the inside of sand pipe (4.3) is arranged to the annular is equipped with the annular and prevents stifled pipe (4.3.3), the bottom that the annular prevents stifled pipe (4.3.3) is opened has the second annular to advance husky slit (4.3.4), sand pipe (4.3) is arranged to the annular and the annular prevents stifled pipe (4.3.3) and dashes husky water inlet (1.3) and arrange husky mouth (1.4) through the pipeline intercommunication.

7. The water purification apparatus of claim 5, wherein: a plurality of sand inlet holes (4.3.2) are formed on the annular sand discharge pipe (4.3) at equal intervals according to the circumference.

8. The water purification apparatus of claim 1, wherein: sediment sand discharging area (4) is equipped with blow off pipe (4.4), blow off pipe (4.4) intercommunication is washed delivery port (1.6) and purification area (6) bottom.

9. The water purification apparatus of claim 1, wherein: the annular outer wall downwardly extending of microstrainer (5) will purification zone (6) divide into down purification layer (6.1) and go upward purification layer (6.2), first annular water-locator (6.3) are established in the upper end of purifying layer (6.1) down, the lower extreme that purifies layer (6.1) down and the lower extreme that purifies layer (6.2) upward communicate each other, the upper end intercommunication buffer memory (7) that purifies layer (6.2) upward.

10. The water purification apparatus of claim 1, wherein: and a second annular water distributor (7.1) is arranged in the buffer area (7), and the second annular water distributor (7.1) is communicated with a flushing water inlet (1.5) through a pipeline (7.1).