CN215232518U - Filter material layer capable of elastically stretching and retracting and filter device thereof - Google Patents

Abstract

The utility model provides an elastically telescopic filter material layer and a filter device thereof, which comprises an upper press screen plate, a plurality of groups of compressed filter materials and a lower bearing screen plate; the upper screen pressing plate and the lower screen bearing plate are arranged in parallel, the upper screen pressing plate and the lower screen bearing plate can move back to back or opposite to each other, and a filtering area with adjustable volume is formed between the upper screen pressing plate and the lower screen bearing plate; a plurality of groups of compressed filter materials are filled in the filtering area, each compressed filter material comprises a flexible part and a plurality of filter material parts, one end of each flexible part is connected with the upper screen pressing plate, the other end of each flexible part is connected with the lower screen bearing plate, the plurality of filter material parts are fixedly sleeved on the flexible parts at equal intervals, a gap is formed between every two adjacent filter material parts, and when the upper screen pressing plate and the lower screen bearing plate move oppositely, the flexible parts are tensioned; the problem of current filter equipment poor to the backwash effect of filter material, influence the filter effect is solved.

Description

Filter material layer capable of elastically stretching and retracting and filter device thereof

Technical Field

The utility model relates to a water treatment facilities technical field especially relates to a filtering material layer that can elastically stretch out and draw back and filter equipment thereof.

Background

The filter is generally used for removing suspended impurities in water, and the working principle of the filter equipment is that suspended particles with the particle size of more than 10um in water are intercepted by utilizing tiny gaps formed by stacking filter materials, so that the water quality is purified. Because the gaps among the grain diameters of the filter materials are smaller, the filter material has higher filtering precision and can effectively intercept more tiny suspended matters. But is not suitable for the treatment of sewage with high suspended matter content.

At present, a plurality of filtering devices and filtering materials are available in the aspect of filtering and purifying water quality in sewage treatment, most of the filtering devices and the filtering materials still use conventional filtering, such as a gravity type filtering pool or a filter which uses filtering materials such as quartz sand, ceramsite, anthracite, activated carbon and the like, and the filtering materials have high density and heavy mass; meanwhile, the filter material is washed out of order by backwash water from bottom to top during backwashing in the traditional mode, and the filter material is difficult to stably discharge after reaching the standard due to the gradual reduction of the filter capacity of the filter material due to poor backwashing effect after running for a period of time; and with the stricter of the pollutant discharge standard in China, the discharge standard of the concentration of the suspended solids in the effluent is required to be gradually improved, and often, one filtering device does not reach the designed service life but does not continuously meet the use requirement due to the improvement of the discharge standard, so that the filtering device needs to be replaced or technically modified, normal production is influenced, and economic loss is caused.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an elastically stretchable filter material layer and a filtering apparatus thereof, so as to solve the problem that the filtering effect is affected due to the poor backwashing effect of the filtering material of the conventional filtering apparatus.

The utility model provides an elastically stretchable filter material layer, which comprises an upper pressing screen plate, a plurality of groups of compressed filter materials, a lower bearing screen plate and springs, wherein the upper pressing screen plate and the lower bearing screen plate are arranged in parallel, the upper pressing screen plate and the lower bearing screen plate can move back to back or in opposite directions, and a filtering area with adjustable volume is formed between the upper pressing screen plate and the lower bearing screen plate; a plurality of groups of compressed filter materials are filled in the filtering area, each compressed filter material comprises a flexible part and a plurality of filter material parts, one end of each flexible part is connected with the upper screen pressing plate, the other end of each flexible part is connected with the lower screen bearing plate, the plurality of filter material parts are fixedly sleeved on the flexible parts at equal intervals, a gap is formed between every two adjacent filter material parts, when the upper screen pressing plate and the lower screen bearing plate move oppositely to the largest peak value of the filtering area volume, the flexible parts are tensioned and arranged between the upper screen pressing plate and the lower screen bearing plate, every two adjacent filter material parts in the same group are connected through the flexible parts in a tensioned state so as to form a cleaning gap, when the upper screen pressing plate and the lower screen bearing plate move relatively to the smallest peak value of the filtering area volume, any two adjacent filter material parts are abutted against each other, the plurality of filtering pieces form a filtering layer for filtering impurities in the sewage; the spring is arranged between the upper screen pressing plate and the lower screen bearing plate, one end of the spring is connected with the upper screen pressing plate, and the other end of the spring is connected with the lower screen bearing plate.

Furthermore, the upper screen pressing plate is a porous plate, and the lower screen bearing plate is a porous plate.

Further, the flexible part is a connecting rope.

Furthermore, the filter material part is a long strip-shaped elastic porous compressible fiber filter material, and the fiber filter material sequentially forms a plurality of structures protruding outwards along the length direction of the fiber filter material.

The utility model also provides a filtering device, which comprises the filtering material layer capable of elastic expansion, a tank body, a filtering material expansion component, a filtering plate and a filtering cap component and a backwashing pipeline; the filter material layer is arranged in the tank body, the lower screen bearing plate is fixedly connected with the inner wall of the tank body, a clear water area is formed between the upper part of the upper screen bearing plate and the tank body, a sewage area is formed between the lower part of the lower screen bearing plate and the tank body, the sewage area is provided with a water inlet end and a sewage discharge end, and the clear water area is provided with a water outlet end; the filter plate and filter cap assembly is arranged in the sewage area; the backwashing pipeline comprises a first backwashing path and a second backwashing path, the water inlet end of the first backwashing path is communicated with a sewage area below the filter plate filter cap assembly, the water outlet end of the first backwashing pipeline is communicated with the sewage discharge end of the sewage area, the water inlet end of the second backwashing path is communicated with the clean water area, and the water outlet end of the second backwashing path is communicated with the sewage discharge end of the sewage area.

Furthermore, the backwashing pipeline comprises a backwashing water inlet pipeline and a backwashing water outlet pipeline; the backwashing water inlet pipeline comprises a water inlet three-way pipe, a lower backwashing water inlet electric valve, an upper backwashing water inlet electric valve and a backwashing piece, the water inlet three-way pipe comprises a water inlet end and two water outlet ends, one water outlet end of the water inlet three-way pipe is provided with the lower backwashing water inlet electric valve and is communicated with the sewage area below the filter cap component of the filter plate, the other water outlet end of the water inlet three-way pipe is provided with the upper backwashing water inlet electric valve and is communicated with the water inlet end of the backwashing piece, and the water outlet end of the backwashing piece is right opposite to the filtering area; the sewage discharge ends of the water inlet three-way pipe, the lower backwashing water inlet electric valve, the sewage area and the sewage area form the first backwashing path, and the sewage discharge ends of the water inlet three-way pipe, the upper backwashing water inlet electric valve, the backwashing piece and the sewage area form the second backwashing path.

Furthermore, the backwashing component is a backwashing branch pipe, the backwashing branch pipe is in sliding connection with the upper pressing screen plate, the length of the backwashing branch pipe is larger than the stroke of the upper pressing screen plate, a plurality of groups of through holes are formed in the side wall of the backwashing branch pipe, the through holes are uniformly distributed along the circumferential direction of the backwashing branch pipe, each group of through holes comprises a plurality of through holes, and the through holes in each group are sequentially distributed along the length direction of the backwashing branch pipe.

Furthermore, the backwashing component is a spray head, the spray head is positioned in the clear water area, the top of the spray head is communicated with the water inlet three-way pipe, and the bottom of the spray head is a water outlet end and is opposite to the filter material layer.

Furthermore, the filter material telescopic component comprises a spiral lifting piece and a telescopic piece, the spiral lifting piece is fixed on the tank body, the output end of the spiral lifting piece extends into the tank body and is connected with the telescopic piece to adjust the stroke of the telescopic piece relative to the position of the tank body, and the output end of the telescopic piece is connected with the upper net pressing plate to drive the upper net pressing plate to move towards or away from the lower net bearing plate.

Furthermore, the outer wall of the upper screen pressing plate is in sliding sealing and abutting joint with the inner wall of the tank body.

Compared with the prior art, the utility model provides an elastic telescopic filter material layer, through setting up the pressure otter board, compression filter material and lower bearing net board, and the compression filter material includes flexible piece and a plurality of filter material spare, the one end of flexible piece is connected with last pressure otter board, the other end of flexible piece passes a plurality of filter material spares, and with bearing net board connection down, a plurality of filter material spares are filled in the filtering area, it can carry on the back mutually or move towards each other to bear the otter board down relatively to go up the otter board, the length of flexible piece is the mobilizable scope of last pressure otter board, can adjust the clearance size between a plurality of filter material spares in the filtering area, when last pressure otter board and lower bearing net board move to the filtering area volume for the maximum peak value, the flexible piece tensioning sets up between last pressure otter board and the lower bearing otter board, link via the flexible piece of taut state between two adjacent filter material spares in the same group, for form and wash the clearance, lead in water into this, rivers wash the whole surface of filtering material spare, and the washing of being convenient for is pressing the otter board and holding the otter board relative motion down to the filtration district volume when being minimum peak value when, arbitrary two adjacent filtering material spares conflict the setting, and a plurality of filtering material spares form a filter layer to impurity in the confession filtration sewage.

Compared with the prior art, the utility model also provides a filtering device, separate into clear water district, filtering area and sewage district from top to bottom in proper order with the internal portion of jar through last pressure otter board and lower holding otter board, the sewage district is used for leading-in pending sewage, the precoat in the filtering area carries out filtration treatment to sewage, clear water district is used for accepting the clear water that sewage formed after handling, and discharge the clear water through the play water end, through setting up first backwash route, backwash water is led into in the sewage district to first backwash route, water overflows filter plate filter cap subassembly after, derive the impurity of adhesion in the sewage district through the blowdown end in sewage district, drive the reciprocating motion of last pressure otter board through setting up filter material flexible subassembly simultaneously, thereby drive a plurality of filter material spare in the precoat reciprocating motion in filtering area, the same often with backwash water flow direction, the opposite, can be effectual with attached impurity down on the precoat, the spring is arranged, so that the screen plate can be pressed upwards and the screen plate can move backwards, the second backwashing path is arranged, backwashing water is guided into the filtering area, the filtering material layer is directly washed away, the sewage is discharged from the sewage discharge end of the sewage area, the filtering material layer is further cleaned, the problem that the backwashing effect of the existing filtering device on the filtering material is poor is effectively solved, and the service life of the filtering equipment is greatly prolonged.

Drawings

Fig. 1 is a sectional view of the filter material layer capable of elastically stretching and contracting and the filter device thereof in a normal operation state;

FIG. 2 is a sectional view of the filter material layer capable of elastically stretching and contracting and the filter device thereof when in a backwashing operation state;

fig. 3 is a schematic structural view of an elastically stretchable filter material layer and a filter material layer connecting structure of a filter material stretching assembly and the filter material layer in an embodiment of a filter device of the present invention;

FIG. 4 is a schematic structural diagram of another embodiment of a backwash member in an embodiment of an elastically stretchable filter material layer and a filter device thereof according to the present invention;

fig. 5 is a cross-sectional view of the filter material layer and the filter device thereof shown in fig. 1, which are elastically stretchable.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

As shown in fig. 3, the present embodiment provides an elastically stretchable filter material layer 200, which includes an upper screen pressing plate 210, a plurality of groups of compressed filter materials 220, a lower screen bearing plate 231, and a spring 240, wherein the upper screen pressing plate 210 and the lower screen bearing plate 231 are arranged in parallel, the upper screen pressing plate 210 and the lower screen bearing plate 231 can move back to back or toward each other, and a filter area 120 with an adjustable volume is formed between the upper screen pressing plate 210 and the lower screen bearing plate 231.

Wherein, the upper screen plate 210 is a porous plate, the lower screen plate 231 is a porous plate, sewage enters the filtering area 120 from the upper screen plate 210, impurities in the sewage are blocked by the compressed filtering material 220, and the clear water with the filtered impurities is led out from the filtering area 120 through the lower screen plate 231.

The upper screen pressing plate 210 and the lower screen bearing plate 231 have certain rigidity, that is, when being subjected to external force (for example, water pressure and water flow impact), the upper screen pressing plate 210 and the lower screen bearing plate 231 are not easy to deform, so that the upper screen pressing plate 210 and the lower screen bearing plate 231 are parallel to each other, the upper screen pressing plate 210 moves towards the direction close to or far away from the lower screen bearing plate 231, so that the filter material 220 is conveniently compressed to deform, and the following describes how the compressed filter material 220 deforms in detail.

In the embodiment, a plurality of groups of compressed filter materials 220 are filled in the filtering area, each compressed filter material 220 comprises a flexible member 221 and a plurality of filter materials 222, one end of the flexible member 221 is connected with the upper screen pressing plate 210, the other end of the flexible member 221 is connected with the lower screen bearing plate 231, the plurality of filter materials 222 are fixedly sleeved on the flexible member 221 at equal intervals, a gap is formed between two adjacent filter materials 222, when the upper screen pressing plate 210 and the lower screen bearing plate 231 move back to the filtering area with the maximum peak value of the volume, the gap is arranged between the upper screen pressing plate 210 and the lower screen bearing plate 231, two adjacent filter materials 222 in the same group are connected through the flexible member 221 in a tensioned state to form a cleaning gap, when the upper screen pressing plate 210 and the lower screen bearing plate 231 move relatively to the minimum peak value of the volume of the filtering area, any two adjacent filter materials 222 are arranged to collide with each other, and the plurality of filter materials 222 form a filtering layer, for filtering impurities in the sewage.

The flexible member 221 plays a role in connection, the flexible member 221 in this embodiment is a connection rope, two ends of the flexible member 221 are respectively connected to the upper mesh pressing plate 210 and the lower mesh bearing plate 231, a maximum deformation generated by the extrusion of the plurality of filter material members 222 is a maximum stroke of the upper mesh pressing plate 210 moving towards a direction close to the lower mesh bearing plate 231, and when the flexible member 221 is tensioned, a displacement of the upper mesh pressing plate 210 moving towards a direction far from the lower mesh bearing plate 231 is a maximum stroke of the upper mesh pressing plate moving upwards.

The connecting lines of the two ends of the flexible piece 221 are perpendicular to the upper screen pressing plate 210, and the length direction of the flexible piece 221 when tensioned is the same as the movement direction of the upper screen pressing plate 210, so that the flexible pieces 221 in multiple groups of compressed filter materials 220 can be conveniently arranged between the upper screen pressing plate 210 and the lower screen bearing plate 231.

The filter material 222 in this embodiment is a strip-shaped elastic porous compressible fiber filter material, the fiber filter material sequentially forms a plurality of structures protruding outward along the length direction thereof, in order to fill the entire filter region 120 with the fiber filter material, a plurality of groups of compressed filter materials 220 are provided by setting the compressed filter materials 220, the groups of compressed filter materials 220 are arranged between the upper pressure screen 210 and the lower support screen 231 in a matrix manner, a filter material gap is formed between two adjacent filter material pieces 222, one filter material piece 222 in any group is tightly attached to the adjacent filter material piece 222 in the adjacent group, when the upper pressure screen 210 and the lower support screen 231 move away from each other, the filter material gap between two adjacent filter material pieces 222 in the same group is increased, and when the upper pressure screen 210 and the lower support screen 231 move relatively, the filter material gap between two adjacent filter material pieces 222 in the same group is decreased.

Specifically, the last trompil of fibre filter material, flexible piece 221 passes the hole on the fibre filter material, during the operation, earlier be connected flexible piece 221's one end and lower net plate 231, flexible piece 221 straightens, cluster a plurality of fibre filter materials on flexible piece 221 in proper order, the diameter of a plurality of fibre filter materials with be half of flexible piece 221 length, be connected the other end and the last screen board 210 that presses of flexible piece 221, when flexible piece 221 straightens, guarantee that the length direction of every flexible piece 221 all is perpendicular with last screen board 210 and lower net plate 231 that presses.

Wherein, connect and fix the fibre filter material through knoing on the rope, it is specific, make the fibre filter material be located and connect between two nodes on the rope to fix the fibre filter material.

It is understood that the filter media 222 may be replaced with other structures, and that a plurality of filter media 222 may be designed to perform the filtering function as will occur to those skilled in the art.

The working process is as follows: when the upper screen pressing plate 210 presses the plurality of filter material pieces 222 to cling to the lower screen bearing plate 231, the gaps among the plurality of filter material pieces 222 are minimum, sewage enters the filter area 120 from the upper screen pressing plate 210, at the moment, the filter material pieces 222 in the filter area 120 filter the sewage and intercept impurities, and the filtered sewage is led out through the gaps among the plurality of filter material pieces 222 and the lower screen bearing plate 231; when the upper screen press plate 210 moves away from the lower screen receiving plate 231 until the flexible member 221 is straightened, gaps between the plurality of filter material members 222 become larger, and at this time, impurities adhered to the filter material members 222 are conveniently cleaned.

Compared with the prior art, the filter medium 220 comprises the upper screen pressing plate 210, the compressed filter medium 220 and the lower screen bearing plate 231, the compressed filter medium 220 comprises the flexible member 221 and the plurality of filter members 222, one end of the flexible member 221 is connected with the upper screen pressing plate 210, the other end of the flexible member 221 penetrates through the plurality of filter members 222 and is connected with the lower screen bearing plate 231, the plurality of filter members 222 are filled in the filter area 120, the upper screen pressing plate 210 can move back and forth or opposite to the lower screen bearing plate 231, the length of the flexible member 221 is the movable range of the upper screen pressing plate 210, namely, the gap between the plurality of filter members 222 in the filter area 120 can be adjusted, in sum, the size of the filter gap of the internal compressed filter medium 220 can be adjusted by adjusting the distance between the upper screen pressing plate 210 and the lower screen bearing plate 231, when the upper screen pressing plate 210 moves back and forth with the lower screen bearing plate 231, the flexible member 221 is tightly arranged between the upper screen pressing plate 210 and the lower screen bearing plate 231, two adjacent filter material pieces 222 in the same group are connected through the flexible piece 221 in a tensioned state to form a cleaning gap, water is introduced into the cleaning gap, the water flow washes the whole surface of the filter material pieces 222, the cleaning is facilitated, and when the upper screen pressing plate 210 and the lower screen bearing plate 231 move relatively, the gap between any two adjacent filter material pieces 222 is minimum until the two adjacent filter material pieces 222 are in collision arrangement, so that sewage can be filtered.

As shown in fig. 1 to 5, in this embodiment, a filtering apparatus 200 is further provided, which includes the above-mentioned elastically stretchable filter material layer 200, and further includes a tank 100, a filter material stretching assembly 300, a filter cap assembly 500 of a filter plate, and a backwashing pipeline, wherein the filter material layer 200 is disposed in the tank 100, the filter material stretching assembly 300 is installed on the tank 100, an output end of the filter material stretching assembly 320 is connected to the filter material layer 200, the filter cap assembly 500 of the filter plate is installed in the tank 100, and the backwashing pipeline is connected to the tank 100 for cleaning the filter material layer 200.

The tank 100 in this embodiment includes a lower head 140, a cylinder 150 and a cover plate 160, the bottom of the telescopic cylinder 150 is connected to the lower head 140 to form a closed cavity, and the tank 100 is divided into a clean water area 110, a filtering area 120 and a sewage area 130 from top to bottom.

The lower end enclosure 140, the cylinder 150 and the cover plate 160 are connected by welding, and it is understood that other connection methods, such as flange connection, may be adopted without limitation.

To facilitate the installation of the internal components of the can 100, the cover 160 is a detachable structure to facilitate the installation of the internal components of the can 100.

Wherein, the side wall of the cylinder 150 is provided with an access cover 152 facing the filtering area 120, which is convenient for the access of the filtering material layer 200.

Wherein, outlet pipe 142 and blow off pipe 143 are installed to the bottom of low head 140, and specifically, the one end and the sewage district 130 intercommunication of outlet pipe 142, the external container that holds the clear water of the other end of outlet pipe 142, the one end and the sewage district 130 intercommunication of blow off pipe 143, the external sewage collection device (not shown in the figure) of the other end of blow off pipe 143, it can be understood that, the installation all has the valve on outlet pipe 142 and the blow off pipe 143, is used for controlling the break-make of outlet pipe 142 and blow off pipe 143 respectively.

In order to make the tank 100 more stably placed, the bottom of the lower head 140 in this embodiment is fixedly connected with a plurality of support legs 141, the number of the support legs 141 is determined according to the size of the tank 100, and the support legs are uniformly distributed at the bottom of the lower head 140.

Wherein, the outer wall of the upper screen plate 210 is in sliding sealing abutment with the inner wall of the tank body 100, so as to prevent sewage from directly entering the bottommost part of the filtering area 120 from the gap between the upper screen plate 210 and the tank body 100, and the filtering effect is poor.

Wherein, lower net-holding plate 231 is connected with the inner wall of the tank body 100 through a lower net-holding plate 232, specifically, the lower net-holding plate 232 is welded on the inner wall of the tank body 100, the lower net-holding plate 231 is fixed on the lower net-holding plate 232 through a bolt 233, and the lower net-holding plate 231, the lower net-holding plate 232 and the bolt 233 form a lower net-holding plate assembly 230.

Wherein, a water inlet pipe 151 is installed on the side wall above the cylinder 150, one end of the water inlet pipe 151 is externally connected with sewage, and the other end of the water inlet pipe 151 is communicated with the clean water area 110.

Specifically, the filter material layer 200 is disposed in the tank 100, the lower mesh supporting plate 231 is fixedly connected to the inner wall of the tank 100, a clean water area 110 is formed between the upper portion of the upper mesh supporting plate 210 and the tank 100, a sewage area 130 is formed between the lower portion of the lower mesh supporting plate 231 and the tank 100, the clean water area 110 has a water outlet end (water outlet pipe 151), and the sewage area 130 has a water inlet end (water inlet pipe 142) and a sewage discharge end (sewage discharge pipe 143).

It should be noted that the volumes of the filtering section 120 and the clean water section 110 are changed, specifically, when the upper mesh plate 210 moves upwards, the volume of the filtering section 120 is increased, and the volume of the clean water section 110 is decreased, and when the upper mesh plate 210 moves downwards, the volume of the filtering section 120 is decreased, and the volume of the clean water section 110 is increased.

The filter material stretching assembly 300 in this embodiment is used to drive the upper screen pressing plate 210 to move relative to the lower screen bearing plate 231.

The filter material expansion assembly 300 in this embodiment is installed on the tank 100, and the expansion end of the filter material expansion assembly 300 is connected to the upper screen pressing plate 210 for driving the upper screen pressing plate 210 to move toward or away from the lower screen bearing plate 231.

Specifically, the filter material stretching assembly 300 includes a spiral lifting member 310 and a stretching member 320, the spiral lifting member 310 is fixed on the tank body 100, an output end of the spiral lifting member 310 extends into the tank body 100 and is connected with the stretching member 320 for adjusting a position of a stroke of the stretching member 320 relative to the tank body 100, and an output end of the stretching member 320 is connected with the upper screen pressing plate 210 for driving the upper screen pressing plate 210 to move toward or away from the lower screen bearing plate 231.

The telescopic member 320 is a cylinder, an electric push rod or a hydraulic cylinder.

The spiral lifting member 310 is a structure that can move the telescopic member 320 up and down as will be appreciated by those skilled in the art.

The filter plate filter cap assembly 500 in this embodiment is installed in the waste region 130 for backwashing, as will be described in more detail below.

The filter cap assembly 500 of the present embodiment includes a filter plate 510, a support plate 520, and a plurality of filter caps 530, the filter plate 510 is fixed to the inner wall of the can 100 by the support plate 520, the plurality of filter caps 530 are fixed to the filter plate 510 in parallel, and the filter caps 530 are disposed to be directed toward the lower mesh plate 231.

The backwash pipeline in this embodiment is used to clean impurities on the filter material layer 200, and the specific structure and function thereof will be explained in detail below.

The backwashing pipeline in the embodiment of the present disclosure includes a first backwashing path and a second backwashing path, a water inlet end of the first backwashing path is communicated with the sewage zone 130 below the filter plate and filter cap assembly 500, a water outlet end of the first backwashing path is communicated with the sewage pipe 143, a water inlet end of the second backwashing path is communicated with the clean water zone 110, and a water outlet end of the second backwashing path is communicated with the sewage pipe 143.

Specifically, when the first backwashing path is operated, the sewage region 130 below the filter plate and filter cap assembly 500 is filled with water, and as the water level of the sewage region 130 rises, the adhered impurities in the whole sewage region 130 are flushed down and discharged through the sewage pipe 143 below.

Specifically, when the second backwashing path is operated, water enters the filtering region 120, the entering water cleans the filter material layer 200 in the filtering region 120, washes off impurities adhered to the filter material layer 200, and discharges the impurities through the sewage pipe 1430.

In order to realize the functions of the first backwashing path and the second backwashing path, the backwashing pipeline in the embodiment comprises a backwashing water inlet pipeline 400, the backwashing water inlet pipeline 400 comprises a water inlet three-way pipe 410, a lower backwashing water inlet electric valve 420, an upper backwashing water inlet electric valve 430 and a backwashing piece, the water inlet three-way pipe 410 comprises a water inlet end and two water outlet ends, one water outlet end of the water inlet three-way pipe 410 is provided with the lower backwashing water inlet electric valve 420 and is communicated with the sewage zone 130 below the filter cap component 500 of the filter plate, the other water outlet end of the water inlet three-way pipe 410 is provided with the upper backwashing water inlet electric valve 430 and is communicated with the water inlet end of the backwashing piece, and the water outlet end of the backwashing piece is directly opposite to the filtering zone.

To sum up, the three-way water inlet pipe 410, the lower backwash water inlet electrically operated valve 420, the sewage area 130 and the sewage pipe 143 form a first backwash path, and the three-way water inlet pipe 410, the upper backwash water inlet electrically operated valve 430, the backwash member and the sewage pipe 143 form a second backwash path.

The backwash member in this embodiment is a backwash member, which is a backwash branch pipe 440, and in order to make the slide between the backwash branch pipe 440 and the upper pressure screen 210 more stable, the backwash branch pipe 440 in this embodiment is slidably connected to the upper pressure screen 210, and the length of the backwash branch pipe 440 is greater than the stroke of the upper pressure screen 210.

In order to achieve a better cleaning effect, a plurality of groups of through holes are formed in the side wall of the backwashing branch pipe 440, the through holes are evenly distributed along the circumferential direction of the backwashing branch pipe 440, each group of through holes comprises a plurality of through holes, and the through holes in each group are sequentially distributed along the length direction of the backwashing branch pipe 440.

In another embodiment, the backwashing component is a spray head 441, the spray head 441 is located in the clean water region 110, the top of the spray head 441 is communicated with the water inlet three-way pipe 410, and the bottom of the spray head 441 is a water outlet end and is opposite to the filter material layer 200.

The work flow of the filtering stage is as follows: sewage to be filtered is guided into the sewage area 130 of the tank body 100 through the water inlet pipe 142, under the action of pump pressure, the sewage is guided into the clean water area 110 through the lower screen plate 231, gaps among the plurality of filter units and the upper screen plate 210 in sequence, wherein impurities are blocked in the gaps among the plurality of filter units, the clean water flows into the clean water area 110, suspended matters float on the sewage area 130, and the clean water is discharged from the water outlet pipe 151 of the clean water area 110, so that the filtering process is realized.

However, when the filter material layer 200 is used for a period of time, gaps between a plurality of filter units in the filter material layer 200 are blocked by impurities, so that the filtering effect of the filter material layer 200 is weakened, and at this time, backwashing is required to clean the filter material layer 200, which will be described in detail below.

And (3) backwashing stage work flow:

firstly, the lower backwashing water inlet electric valve 420 is opened, the water inlet pipe 142 and the sewage discharge pipe 143 are closed, the water inlet three-way pipe 410 is used for water inlet, water is guided into the sewage area 130 below the filter plate filter cap assembly 500, along with the rise of the water level of the sewage area 130, clean water flows over the filter plate filter cap assembly 500, the water inlet is stopped, the sewage discharge pipe 143 is opened, and impurities accumulated in the sewage area 130 are discharged.

Then, the telescopic member 320 is controlled to make the flexible member 221 in a straightened state, that is, the gap between the plurality of filtering members 222 is the largest, at this time, the upper backwashing water inlet electric valve 430 is opened, water washes the filtering members 222 through the backwashing members, impurities attached to the filtering members 222 are effectively washed down, and are guided into the sewage area 130 through the filter plate and filter cap assembly 500, and are discharged from a sewage discharge pipe, thereby completing the cleaning process.

It should be noted that, when the backwashing component adopts the backwashing branch pipe 440, the backwashing branch pipe 440 extends into the filtering area, the water outlet end is close to the filter material layer 200, and the washing effect is good; when the backwashing part adopts the spray head 441, the water outlet flow of the spray head 441 can be controlled to clean in a spraying mode, so that water is saved, and the backwashing branch pipe 440 and the spray head 441 can be used alternatively, namely the backwashing branch pipe 440 is firstly used for cleaning and then the spray head 441 is used for washing.

Compared with the prior art, the interior of the tank body 100 is sequentially divided into a clear water area 110, a filtering area 120 and a sewage area 130 from top to bottom through an upper screen pressing plate 210 and a lower screen bearing plate 231, the sewage area 130 is used for leading in sewage to be treated, a filter material layer 200 in the filtering area 120 is used for filtering the sewage, the clear water area 110 is used for receiving clear water formed after the sewage is treated, the clear water is discharged through a water outlet end, a first backwashing path is arranged, backwashing water is led into the sewage area 130 through the first backwashing path, impurities adhered to the sewage area 130 are led out through a sewage outlet end of the sewage area 130 after the water overflows through a filter plate filter cap assembly 500, and meanwhile, the filter material telescopic assembly 300 is arranged to drive the upper screen pressing plate 210 to reciprocate so as to drive a plurality of filter material pieces 222 in the filter material layer 200 to reciprocate in the filtering area 120, the flow direction of the filter material telescopic assembly is the same as or opposite to the flow direction of the backwashing water, the impurities adhered to effectively wash down the filter material layer 200, be convenient for press the motion to the back between otter board 210 and the lower otter board 231 through setting up spring 240, through setting up the second backwash route, leading-in the filtering area 120 of backwash water, directly erode filtering material layer 200 to discharge through the blowdown end in sewage district 130, further clear up filtering material layer 200, the effectual current filter equipment 200 of having solved is to the poor problem of filter material backwash effect, great improvement filtration equipment's life.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims (10)

1. An elastically stretchable filter material layer is characterized by comprising an upper press screen plate, a plurality of groups of compressed filter materials, a lower bearing screen plate and springs;

the upper screen pressing plate and the lower screen bearing plate are arranged in parallel, the upper screen pressing plate and the lower screen bearing plate can move back to back or opposite to each other, and a filtering area with adjustable volume is formed between the upper screen pressing plate and the lower screen bearing plate;

the filter area is filled with a plurality of groups of compressed filter materials, each compressed filter material comprises a flexible part and a plurality of filter material parts, one end of each flexible part is connected with the upper pressing screen plate, the other end of each flexible part is connected with the lower bearing screen plate, the plurality of filter material parts are fixedly sleeved on the flexible parts at equal intervals, when the upper pressing screen plate and the lower bearing screen plate move oppositely until the volume of the filter area is the maximum peak value, the flexible parts are tensioned and arranged between the upper pressing screen plate and the lower bearing screen plate, any two adjacent filter material parts are connected through the flexible parts in a tensioned state so as to form a cleaning gap, when the upper pressing screen plate and the lower bearing screen plate move relatively until the volume of the filter area is the minimum peak value, any two adjacent filter material parts are arranged, and the plurality of filter material parts form a filter layer, for filtering impurities in the sewage;

the spring is arranged between the upper screen pressing plate and the lower screen bearing plate, one end of the spring is connected with the upper screen pressing plate, and the other end of the spring is connected with the lower screen bearing plate.

2. The elastically stretchable filter media layer of claim 1, wherein the upper screen press plate is a porous plate and the lower screen support plate is a porous plate.

3. The elastically stretchable filter layer of claim 1, wherein the flexible member is a connecting string.

4. The elastically stretchable filter material layer in accordance with claim 1, wherein the filter material member is an elongated, elastically porous and compressible fibrous filter material having a plurality of outwardly convex structures formed in sequence along the length thereof.

5. A filter device, which is characterized by comprising an elastically telescopic filter material layer as claimed in any one of claims 1 to 4, and further comprising a tank body, a filter material telescopic component, a filter plate and a filter cap component and a backwashing pipeline;

the filter material layer is arranged in the tank body, the lower screen bearing plate is fixedly connected with the inner wall of the tank body, a clear water area is formed between the upper part of the upper screen bearing plate and the tank body, a sewage area is formed between the lower part of the lower screen bearing plate and the tank body, the sewage area is provided with a water inlet end and a sewage discharge end, and the clear water area is provided with a water outlet end;

the filter material telescopic component is arranged on the tank body, and the telescopic end of the filter material telescopic component is connected with the upper screen pressing plate and used for driving the upper screen pressing plate to move towards the direction close to or far away from the lower screen bearing plate;

the filter plate and filter cap assembly is arranged in the sewage area;

the backwashing pipeline comprises a first backwashing path and a second backwashing path, the water inlet end of the first backwashing path is communicated with a sewage area below the filter plate filter cap assembly, the water outlet end of the first backwashing pipeline is communicated with the sewage discharge end of the sewage area, the water inlet end of the second backwashing path is communicated with the clean water area, and the water outlet end of the second backwashing path is communicated with the sewage discharge end of the sewage area.

6. The filtration device of claim 5, wherein the backwash line comprises a backwash water inlet line;

the backwashing water inlet pipeline comprises a water inlet three-way pipe, a lower backwashing water inlet electric valve, an upper backwashing water inlet electric valve and a backwashing piece, the water inlet three-way pipe comprises a water inlet end and two water outlet ends, one water outlet end of the water inlet three-way pipe is provided with the lower backwashing water inlet electric valve and is communicated with the sewage area below the filter cap component of the filter plate, the other water outlet end of the water inlet three-way pipe is provided with the upper backwashing water inlet electric valve and is communicated with the water inlet end of the backwashing piece, and the water outlet end of the backwashing piece is right opposite to the filtering area;

the sewage discharge ends of the water inlet three-way pipe, the lower backwashing water inlet electric valve, the sewage area and the sewage area form the first backwashing path, and the sewage discharge ends of the water inlet three-way pipe, the upper backwashing water inlet electric valve, the backwashing piece and the sewage area form the second backwashing path.

7. The filtering device according to claim 6, wherein the backwashing component is a backwashing branch pipe, the backwashing branch pipe is slidably connected with the upper pressure screen plate, the length of the backwashing branch pipe is greater than the stroke of the upper pressure screen plate, a plurality of groups of through holes are formed in the side wall of the backwashing branch pipe, the plurality of groups of through holes are uniformly arranged along the circumferential direction of the backwashing branch pipe, each group of through holes comprises a plurality of through holes, and the plurality of through holes in each group are sequentially arranged along the length direction of the backwashing branch pipe.

8. The filter device according to claim 6, wherein the backwashing member is a spray head, the spray head is positioned in the clean water area, the top of the spray head is communicated with the water inlet three-way pipe, and the bottom of the spray head is a water outlet end and is opposite to the filter material layer.

9. The filtering device as claimed in claim 5, wherein the filter material stretching assembly comprises a spiral lifting member and a stretching member, the spiral lifting member is fixed on the tank body, an output end of the spiral lifting member extends into the tank body and is connected with the stretching member for adjusting a position of a stroke of the stretching member relative to the tank body, and an output end of the stretching member is connected with the upper screen pressing plate for driving the upper screen pressing plate to move towards or away from the lower screen bearing plate.

10. The filtration device of claim 5, wherein an outer wall of the upper platen plate is in sliding sealing abutment with an inner wall of the tank.

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