CN115159705B - Dual-medium filter capable of adjusting density of filter medium - Google Patents

Abstract

The invention relates to the technical field of water treatment, in particular to a double-medium filter capable of adjusting the density of a filter medium, which comprises a filter main body, a perforated partition plate, a perforated support plate, a soluble pollutant adsorption medium, an elastic medium filter medium, a belt Kong Dingban and a connecting rod, wherein the filter main body is provided with a sewage inlet and a clear water outlet; the top end of the porous partition board is filled with a soluble pollutant adsorption medium; the elastic medium filter medium is filled between the perforated baffle plate and the perforated supporting plate; connecting rod fixed connection foraminiferous layer board and area Kong Dingban, this application is through the aperture of adjusting foraminiferous roof and the height of adjusting foraminiferous layer board, and then can adjust filter medium's density, satisfies the filtration requirement of the sewage of different water tides characteristic.

Description

Dual-medium filter capable of adjusting density of filter medium

Technical Field

The invention relates to the technical field of water treatment, in particular to a double-medium filter capable of adjusting the density of a filter medium.

Background

Filtration devices are needed for the water inlet and tail water treatment of sewage treatment plants, river water purification treatment, rainwater drainage treatment, rainwater and sewage converging and overflow treatment and water inlet treatment of water works, and the sewage treatment plants generally adopt membrane methods, such as MBR technology. Although the membrane method has high treatment efficiency, the investment is large, the operation and maintenance cost is high, the service life is short, and the popularization is not easy. Most of river water purification adopts integrated equipment, mainly comprises magnetic separation and rapid flocculation precipitation, but can not remove soluble pollutants, and has high operation and maintenance cost, so that the river water purification can be used as temporary emergency treatment equipment, and the symptoms and the root causes can be treated. Most of the rainwater treatment adopts sand filtration or precipitation. The sand filter occupies a large area, and can be placed in a place which is hardly found at the discharge port, so that the sand filter is hardly adopted in China. The sedimentation has high manufacturing cost and higher operation and maintenance cost, and can become a pollution source if the maintenance is improper. The rainwater and sewage converging overflow is the biggest problem of black and odorous river treatment, the method adopted at present is that the construction and operation costs are high due to the adoption of a regulating reservoir and rapid flocculation precipitation, and the method can be popularized in large cities almost only. The running water factory generally adopts sand filtration and membrane method to treat the inflow water, and the running water factory is large in occupied area or high in construction, operation and maintenance cost.

Chinese patent CN111530165a discloses a filter of adjustable filter media density, including the filter vat, the top rotation in the filter vat is connected with the lead screw, the lead screw is driven through manual or electric mode, the lead screw lower extreme is fixed with the clamp plate, be provided with filter media between clamp plate and the bottom plate of filter vat, be provided with the jet stack in the filter vat, the upper portion lateral wall of filter vat is provided with the clear water discharge port, the bottom below of filter vat is provided with the swirler, the swirler is connected with the sewage water inlet, the lateral wall of filter vat is provided with the backwash water inlet, the lateral wall of filter vat is provided with backwash sewage discharge port, the clamp plate below and the bottom plate top of filter vat are provided with differential pressure sensor.

The density of the filter medium is adjusted through the height of the screw rod adjusting pressure plate, and the screw rod is easy to erode in the actual use process, so that the height of the pressure plate cannot be effectively adjusted.

Disclosure of Invention

To above-mentioned problem, provide a two medium filters of adjustable filter media density, adjust the height of foraminiferous layer board through the aperture of adjusting foraminiferous roof, and then can adjust filter media's density, satisfy the filtration requirement of the sewage of different water tides, solved the problem that the foraminiferous layer board of lead screw regulation receives the erosion easily.

In order to solve the problems in the prior art, the invention adopts the following technical scheme:

the utility model provides a double-medium filter of adjustable filter medium density, including filtering the main part, foraminiferous baffle, foraminiferous layer board, soluble pollutant adsorption medium, elastic medium filter medium, area Kong Dingban and connecting rod, be provided with sewage access mouth and clear water discharge port on the filtering main part, sewage access mouth is less than clear water discharge port, foraminiferous baffle, foraminiferous layer board and foraminiferous roof are coaxial setting in the filtering main part in proper order from top to bottom, foraminiferous baffle and the inner wall fixed connection of filtering the main part, foraminiferous layer board and foraminiferous roof and the inner wall fixed connection of filtering the main part, foraminiferous baffle, foraminiferous layer board and foraminiferous roof are located between sewage access mouth and the clear water discharge port, foraminiferous roof's aperture is adjustable; the top end of the porous partition board is filled with a soluble pollutant adsorption medium; the elastic medium filter medium is filled between the perforated baffle plate and the perforated supporting plate; the connecting rod fixedly connects the perforated plate and the strap Kong Dingban.

Preferably, the strap Kong Dingban comprises a plate body and a rubber barrel; the plate body is coaxially and slidingly arranged in the filtering main body, the plate body is fixedly connected with the supporting plate with holes through a connecting rod, a cavity is arranged in the plate body, and first through holes which are coaxial with the plate body are uniformly distributed on the plate body; the coaxial setting of rubber section of thick bamboo is in first through-hole, and the both ends and the first through-hole sealing connection of upper and lower end of rubber section of thick bamboo are through the pressure of adjusting the cavity in order to adjust the internal diameter of first through-hole.

Preferably, the outer end of the first through hole is provided with a first internal thread ring coaxial with the first through hole, and the inner diameter of the first internal thread ring is larger than that of the first through hole; the two ends of the rubber cylinder are provided with first ring parts coaxial with the rubber cylinder, and the first ring parts are coaxially abutted to the outer ends of the first through holes; the top plate with the hole further comprises a first abutting ring, the first abutting ring is coaxially abutted to the outer end of the first ring part, a first external thread cylinder coaxial with the first abutting ring is arranged on the periphery of the first abutting ring, and the first external thread cylinder is in threaded connection with the first internal thread ring; the inner periphery of the first abutting ring is provided with a second positioning cylinder coaxial with the first abutting ring, and the end part of the rubber cylinder is positioned between the inner periphery of the first through hole and the outer periphery of the second positioning cylinder.

Preferably, the outer end of the first externally threaded cylinder is provided with a first friction increasing ring coaxial therewith.

Preferably, the device also comprises a pressure adjusting mechanism, wherein the pressure adjusting mechanism is communicated with the cavity and used for adjusting the pressure of the cavity, and comprises a sealing cylinder, a corrugated pipe, a piston, a polish rod and a screw rod; the sealing cylinder is arranged at the outer end of the filtering main body, and one end of the inner cavity of the sealing cylinder is communicated with the cavity through the corrugated pipe; the piston is coaxially and slidingly arranged in the sealing cylinder; the polish rod is fixedly arranged in the sealing cylinder in the same axial direction, penetrates through the piston and is in sliding fit with the piston; the screw rod is coaxially and rotatably arranged in the sealing cylinder, penetrates through the piston and is in threaded connection with the piston.

Preferably, the device also comprises an equal-interval adjusting mechanism, wherein the equal-interval adjusting mechanism comprises a rotating shaft mounting piece, a rotating shaft, a first connecting rod, a second connecting rod, a corrugated cylinder and a sealing cover; the perforated support plates are arranged in the filtering main body in a linear moving mode at equal intervals, and second through holes coaxial with the perforated support plates are formed in the perforated support plates; the rotating shaft mounting piece is coaxially arranged in the second through hole, and the rotating shaft is radially arranged in the rotating shaft mounting piece; the middle positions of the first connecting rod and the second connecting rod are rotationally arranged on the rotating shaft, the first connecting rod and the second connecting rod at the top end are rotationally connected with the bottom end of the porous partition plate, and the end parts of the first connecting rod and the second connecting rod which are adjacent up and down are rotationally connected; the corrugated cylinders are coaxially arranged at the top ends of the supporting plates with holes, the top ends of the corrugated cylinders are in sealing connection with the structure at the top parts of the corrugated cylinders, and the first connecting rods and the second connecting rods are positioned between the corrugated cylinders; the sealing cover is coaxially and hermetically arranged at the bottom end of the bottom-end perforated supporting plate.

Preferably, the rotary shaft mounting piece comprises two semicircular plugs symmetrically arranged in the second through hole, the rotary shaft penetrates through the two semicircular plugs along the radial direction, a symmetrical surface of the semicircular plugs is provided with a notch penetrating through the symmetrical surface along the axial direction of the semicircular plugs, and the central positions of the first connecting rod and the second connecting rod are arranged in the symmetrical notch.

Preferably, positioning columns and positioning grooves are respectively arranged on two sides of the radial surface of the semicircular plug.

Preferably, two ends of the second through hole are provided with second internal thread rings coaxial with the second through hole, and the inner diameter of each second internal thread ring is larger than the diameter of the second through hole; the two ends of the corrugated cylinder are provided with second ring parts coaxial with the corrugated cylinder, the equal-interval adjusting mechanism further comprises a second external thread cylinder, the semicircular plug is coaxially abutted against the end face of the second through hole, and the second external thread cylinder is coaxially screwed in the second internal thread ring and is abutted against the second ring parts.

Preferably, the filter also comprises limit bars and limit bolts, wherein the limit bars are uniformly distributed on the inner wall of the filter body and extend along the axial direction of the filter body, the first notch is arranged on the circumferential surface of the supporting plate with the holes and is in sliding fit with the limit strips, the second notch is arranged on the circumferential surface of the top plate with the holes and is in sliding fit with the limit strips, and the limit bolts are fixedly arranged at the bottom ends of the limit strips.

Compared with the prior art, the beneficial effects of this application are:

1. according to the method, the height of the perforated supporting plate is adjusted by adjusting the aperture of the perforated top plate, so that the density of the filter medium can be adjusted, and the filtering requirements of sewage with different water properties are met;

2. the invention adopts the principle of physical filtration and adsorption, does not need to add any chemical agent, can remove granular and soluble pollutants at the same time, has high removal efficiency, has no other operation cost except energy consumption, and has low maintenance cost and small occupied space.

Drawings

FIG. 1 is a perspective view of a filter of the present application;

FIG. 2 is a side view of the filter of the present application;

FIG. 3 is a cross-sectional view at section A-A of FIG. 2;

FIG. 4 is a perspective cross-sectional view at section A-A of FIG. 2;

FIG. 5 is a partial enlarged view at B of FIG. 3;

FIG. 6 is an enlarged view of a portion of FIG. 3 at C;

FIG. 7 is a partial enlarged view at D of FIG. 3;

FIG. 8 is a perspective view of a perforated baffle plate, perforated pallet and perforated top plate of the present application;

FIG. 9 is a perspective view of the equidistant adjustment mechanism of the present application;

fig. 10 is an exploded perspective view of the spindle mount of the present application.

The reference numerals in the figures are:

1-a filter body; 1 A-A sewage inlet; 1 b-a clear water outlet; 1c, limiting strips; 1 d-limit bolt; 1 e-backwash water inlet; 1 f-backwash water discharge port; 1 g-compressed air inlet; 1 h-gas injection tube; 1 i-a plastic sucking medium feeding port of the soluble pollutant; 1 j-a discharge port of the soluble pollutant adsorption medium; 2-a separator with holes; 3-a supporting plate with holes; 3 A-A second through hole; 3a 1-a second internal thread turn; 3 b-a first notch; 4-band Kong Dingban; 4 A-A plate body; 4a 1-cavity; 4a 2-a first through hole; 4a 3-a first internal thread turn; 4 b-a rubber cylinder; 4b 1-a first ring portion; 4 c-a first abutment ring; 4c 1-a first external thread cylinder; 4c 3-a first friction enhancing ring; 4c 2-a second positioning cylinder; 4 d-a second notch; 5-a soluble contaminant adsorption media; 6-an elastic media filter media; 7-connecting rods; 8-a pressure adjusting mechanism; 8 A-A seal cartridge; 8 b-bellows; 8 c-a piston; 8 d-polish rod; 8 e-a screw rod; 9 A-A spindle mount; 9a 1-semicircle plugs; 9a 2-notch; 9a 3-positioning columns; 9a 4-positioning grooves; 9 b-a rotating shaft; 9 c-a first link; 9 d-a second link; 9 e-a corrugated cylinder; 9e 1-a second ring portion; 9 f-sealing the cover; 9 g-a second external thread cylinder; 9g 1-second friction enhancing ring.

Detailed Description

The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.

As shown in fig. 1-10, the present application provides: the double-medium filter comprises a filter main body 1, a perforated partition plate 2, a perforated supporting plate 3, a soluble pollutant adsorption medium 5, an elastic medium filter medium 6, a perforated top plate 4 and a connecting rod 7, wherein a sewage inlet 1a and a clear water outlet 1b are arranged on the filter main body 1, and the sewage inlet 1a is lower than the clear water outlet 1b;

the porous partition plate 2, the porous supporting plate 3 and the porous top plate 4 are sequentially and coaxially arranged in the filter main body 1 from top to bottom, the porous partition plate 2 is fixedly connected with the inner wall of the filter main body 1, the porous supporting plate 3 and the porous top plate 4 are fixedly connected with the inner wall of the filter main body 1, the porous partition plate 2, the porous supporting plate 3 and the porous top plate 4 are positioned between the sewage inlet 1a and the clear water outlet 1b, and the aperture of the porous top plate 4 is adjustable;

the top end of the porous partition board 2 is filled with a soluble pollutant adsorption medium 5;

the elastic medium filter medium 6 is filled between the perforated baffle plate 2 and the perforated support plate 3;

the connecting rod 7 fixedly connects the perforated supporting plate 3 and the perforated top plate 4.

The sewage is discharged into the filter main body 1 through the sewage inlet 1a, filtered by the soluble pollutant adsorption medium 5 and the elastic medium filter medium 6, and discharged through the clean water outlet 1b;

specifically, after sewage is discharged into the filtering main body 1, the sewage sequentially passes through the perforated top plate 4, the perforated supporting plate 3, the elastic medium filtering medium 6 and the perforated partition plate 2, the perforated top plate 4 with different apertures has different resistances to sewage due to the adjustable aperture of the perforated top plate 4, the perforated top plate 4 is fixedly connected with the perforated supporting plate 3 through the connecting rod 7, when the acting force of the sewage on the perforated top plate 4 is greater than the gravity of the perforated top plate 4 and the buoyancy of the sewage on the perforated top plate 4, the perforated top plate 4 rises in the filtering main body 1, and then the perforated supporting plate 3 is pushed to be close to the perforated partition plate 2 through the connecting rod 7, so that the volume of the elastic medium filtering medium 6 is reduced, the quality of the elastic medium filtering medium 6 is fixed, and the density of the elastic medium filtering medium 6 can be increased, so that the filtering requirements of the sewage with different water physical characteristics are met;

wherein the elastic medium filter medium 6 can be sponge or other compressible elastic porous substances, the sponge has elasticity, and the filter gap increases with the reduction of the compression volume, and the cost is lower;

the connecting rod 7 is internally provided with a granular adsorption medium, and aiming at sewage characteristics, the granular adsorption medium can be a phosphorus adsorption material based on polyaluminum chloride and ferrous sulfate, and can also be ammonia nitrogen adsorption materials such as zeolite, vermiculite, cation exchange resin and the like;

as some optional embodiments of the application, the filtering main body 1 is further provided with a backwash water inlet 1e, a backwash water outlet 1f, a compressed air inlet 1g and an air jet pipe 1h, valves on the sewage inlet 1a and the clean water outlet 1b are closed, the perforated support plate 3 is lowered to the lowest position, the backwash water inlet 1e is opened to fill the filtering main body, the backwash water inlet 1e is closed, the valve of the compressed air inlet 1g is opened, the elastic medium filtering medium 6 is washed under the impact of compressed air sprayed by the air jet pipe 1h, and after the washing is finished, the elastic medium filtering medium 6 is discharged from the backwash water outlet 1f, and filtering is continued, so that the service life of the elastic medium filtering medium 6 is prolonged; the adsorption medium is replaced periodically according to the sewage characteristics.

The invention adopts the principle of physical filtration and adsorption, does not need to add any chemical agent, can remove granular and soluble pollutants at the same time, has high removal efficiency, has no other operation cost except energy consumption, and has low maintenance cost and small occupied space.

As shown in fig. 5, further: the top plate 4 with holes comprises a plate body 4a and a rubber cylinder 4b;

the plate body 4a is coaxially and slidingly arranged in the filter main body 1, the plate body 4a is fixedly connected with the perforated supporting plate 3 through the connecting rod 7, a cavity 4a1 is arranged in the plate body 4a, and first through holes 4a2 which are coaxial with the plate body 4a are uniformly distributed on the plate body 4 a;

the rubber cylinder 4b is coaxially arranged in the first through hole 4a2, two ends of the rubber cylinder 4b are in sealing connection with the first through hole 4a2 at the upper end and the lower end, and the inner diameter of the first through hole 4a2 is adjusted by adjusting the pressure intensity of the cavity 4a 1.

The plate body 4a is coaxially and slidably arranged in the filtering main body 1, the cavity 4a1 is arranged in the plate body 4a, the rubber cylinder 4b is coaxially arranged in the first through hole 4a2, two ends of the rubber cylinder 4b are in sealing connection with the outer end of the first through hole 4a2, the rubber cylinder 4b can deform, and when the aperture of the top plate 4 with holes needs to be adjusted, the inner diameter of the rubber cylinder 4b can be reduced along with the increase of the pressure of the cavity 4a1 by adjusting the pressure of the cavity 4a 1;

specifically, the external pipeline of the filter main body 1 is connected with the cavity 4a1 in the filter main body 1, liquid or gas can be injected into the cavity 4a1 through the pipeline, so that the pressure intensity of the cavity 4a1 is regulated, the inner diameter of the rubber cylinder 4b is regulated, the resistance of the perforated top plate 4 to sewage is regulated according to different water properties, and the height of the perforated supporting plate 3 is regulated.

As shown in fig. 5, further: the outer end of the first through hole 4a2 is provided with a first internal thread ring 4a3 coaxial with the first through hole, and the inner diameter of the first internal thread ring 4a3 is larger than the inner diameter of the first through hole 4a2; the two ends of the rubber cylinder 4b are provided with first ring parts 4b1 coaxial with the rubber cylinder, and the first ring parts 4b1 are coaxially abutted against the outer ends of the first through holes 4a2; the top plate 4 with holes further comprises a first abutting ring 4c, the first abutting ring 4c is coaxially abutted against the outer end of the first ring part 4b1, a first external thread cylinder 4c1 coaxial with the first abutting ring 4c is arranged on the periphery of the first abutting ring 4c, and the first external thread cylinder 4c1 is in threaded connection with the first internal thread ring 4a 3; the inner periphery of the first abutment ring 4c is provided with a second positioning cylinder 4c2 coaxial therewith, and the end of the rubber cylinder 4b is located between the inner periphery of the first through hole 4a2 and the outer periphery of the second positioning cylinder 4c 2.

The outer end of the rubber cylinder 4b is provided with a first annular part 4b1 coaxial with the rubber cylinder, so that the rubber cylinder can be abutted against the outer end of the rubber cylinder 4b2, the first outer thread cylinder 4c1 is coaxially screwed into the first inner thread ring 4a3, so that the first abutting ring 4c can be abutted against the outer end of the first annular part 4b1, the rubber cylinder 4b can be stably arranged between the two first through holes 4a2, and meanwhile, the second positioning cylinder 4c2 can be abutted against the two ends of the rubber cylinder 4b in the first through holes 4a2, so that the rubber cylinder 4b is prevented from being directly separated from the first through holes 4a2 due to overlarge pressure of the cavity 4a 1.

As shown in fig. 5, further: the outer end of the first external thread cylinder 4c1 is provided with a first friction increasing ring 4c3 coaxial therewith.

Through set up the first friction-increasing ring 4c3 rather than coaxial at the outer end of first external screw thread section of thick bamboo 4c1 for when installing rubber section of thick bamboo 4b, can be convenient for first external screw thread section of thick bamboo 4c1 coaxial screw connect in first internal screw thread circle 4a3, be convenient for follow-up dismantlement simultaneously.

As shown in fig. 3 and 6, further: the pressure regulating mechanism 8 is communicated with the cavity 4a1 and used for regulating the pressure of the cavity, and the pressure regulating mechanism 8 comprises a sealing cylinder 8a, a corrugated pipe 8b, a piston 8c, a polished rod 8d and a screw rod 8e;

the sealing cylinder 8a is arranged at the outer end of the filter main body 1, and one end of the inner cavity of the sealing cylinder 8a is communicated with the cavity 4a1 through the corrugated pipe 8 b;

the piston 8c is coaxially slidably provided in the seal cylinder 8 a;

the polish rod 8d is fixedly arranged in the sealing cylinder 8a in the same axial direction, and the polish rod 8d penetrates through the piston 8c and is in sliding fit with the piston 8 c;

the screw rod 8e is coaxially rotatably provided in the seal cylinder 8a, and the screw rod 8e penetrates the piston 8c and is screwed thereto.

The seal cylinder 8a is arranged outside the filter main body 1, when the pressure intensity of the cavity 4a1 needs to be regulated, the screw rod 8e is rotated relative to the seal cylinder 8a, the screw rod 8e is in threaded connection with the piston 8c, the polish rod 8d penetrates through the piston 8c and is in sliding fit with the piston 8c, namely, the piston 8c moves in the seal cylinder 8a, meanwhile, one end of the inner cavity of the seal cylinder 8a is communicated with the cavity 4a1 through the corrugated pipe 8b, and the pressure intensity of the cavity 4a1 can be regulated, so that the inner diameter of the rubber cylinder 4b is regulated, and when the perforated top plate 4 moves in the filter main body 1, the seal cylinder 8a is connected with the cavity 4a1 through the corrugated pipe 8b, so that the normal lifting of the perforated top plate 4 can not be influenced.

As shown in fig. 3, 7, 9 and 10, further: the device also comprises an equal-interval adjusting mechanism, wherein the equal-interval adjusting mechanism comprises a rotating shaft mounting piece 9a, a rotating shaft 9b, a first connecting rod 9c, a second connecting rod 9d, a corrugated cylinder 9e and a sealing cover 9f; the perforated support plate 3 is arranged in the filter main body 1 in a linear moving way at equal intervals, and a second through hole 3a coaxial with the perforated support plate 3 is arranged on the perforated support plate;

the rotating shaft mounting piece 9a is coaxially arranged in the second through hole 3a, and the rotating shaft 9b is radially arranged in the rotating shaft mounting piece 9 a;

the centering positions of the first connecting rod 9c and the second connecting rod 9d are rotationally arranged on the rotating shaft 9b, the topmost first connecting rod 9c and the second connecting rod 9d are rotationally connected with the bottom end of the porous partition plate 2, and the end parts of the first connecting rod 9c and the second connecting rod 9d which are adjacent up and down are rotationally connected;

the corrugated cylinders 9e are coaxially arranged at the top ends of the perforated supporting plates 3, the top ends of the corrugated cylinders 9e are in sealing connection with the structure at the top parts of the corrugated cylinders, and the first connecting rods 9c and the second connecting rods 9d are positioned between the corrugated cylinders 9 e;

the sealing cover 9f is coaxially and sealingly provided at the bottom end of the bottommost perforated pallet 3.

The perforated support plates 3 are arranged in the filtering main body 1 in a linear moving mode at equal intervals, the elastic medium filtering medium 6 has elasticity, and meanwhile, under the action of gravity, the density of the elastic medium filtering medium 6 is gradually increased from top to bottom under the action of gravity, namely, the density of the elastic medium filtering medium 6 is always different in a natural state or a compressed state, so that the filtering effect is poor;

by dividing the elastic medium filter media 6 into multiple layers, when the bottom-most perforated support plate 3 ascends, all the perforated support plates 3 linearly move at equal intervals, so that the influence of gravity is reduced, when the perforated top plate 4 ascends the bottom-most perforated support plate 3, the rotating shaft mounting piece 9a is coaxially arranged in the second through hole 3a, the rotating shaft 9b radially penetrates through the rotating shaft mounting piece 9a, and meanwhile, due to the fact that the adjacent perforated support plates 3 are rotationally connected through the first connecting rod 9c and the second connecting rod 9d, under the action of a scissor structure, all the perforated support plates 3 can linearly move at equal intervals, and the top ends of the perforated support plates 3 are provided with corrugated cylinders 9e which are in sealing connection with the top structures of the perforated support plates, so that sewage and the elastic medium filter media 6 cannot influence the normal rotation of the first connecting rod 9c and the second connecting rod 9 d;

the sealing cap 9f can prevent sewage from entering the bellows cylinder 9e through the second through hole 3a at the lowest end.

As shown in fig. 10, further: the shaft mounting member 9a includes two semicircular plugs 9a1 symmetrically disposed in the second through hole 3a, the shaft 9b penetrates the two semicircular plugs 9a1 in the radial direction, the symmetry plane of the semicircular plugs 9a1 is provided with a notch 9a2 penetrating along the axial direction, and the center positions of the first link 9c and the second link 9d are disposed in the symmetrical notch 9a 2.

By coaxially disposing the two semicircular plugs 9a1 in the second through hole 3a, the two notches 9a2 are made to form a space capable of accommodating the intermediate positions of the first link 9c and the second link 9d, while by passing the rotation shaft 9b through the notches 9a2 in the radial direction, the intermediate positions of the first link 9c and the second link 9d are made to be rotatably disposed on the rotation shaft 9 b.

As shown in fig. 10, further: positioning posts 9a3 and positioning grooves 9a4 are also respectively arranged on two sides of the radial surface of the semicircular plug 9a 1.

The two semicircular plugs 9a1 are symmetrically abutted, so that the symmetrical surfaces of the two semicircular plugs 9a1 are embedded through the positioning column 9a3 and the positioning groove 9a4, and the two semicircular plugs 9a1 can be prevented from being separated due to axial force, so that the stability of the structure is improved.

As shown in fig. 10, further: two ends of the second through hole 3a are provided with second internal thread rings 3a1 coaxial with the second through hole, and the inner diameter of the second internal thread rings 3a1 is larger than the diameter of the second through hole 3a; the corrugated tube 9e is provided with a second ring portion 9e1 coaxial therewith at both ends, and the equal-interval adjusting mechanism further includes a second external thread tube 9g, the semicircular plug 9a1 is coaxially abutted against the end face of the second through hole 3a, and the second external thread tube 9g is coaxially screwed into the second internal thread ring 3a1 and abutted against the second ring portion 9e 1.

The two ends of the corrugated tube 9e are formed into a second ring part 9e1 coaxial with the corrugated tube, the second ring part is abutted against the outer end of the second through hole 3a, then the second external thread tube 9g is coaxially screwed into the second internal thread ring 3a1, the second external thread tube 9g can be abutted against the outer end of the second ring part 9e1, and therefore connection between the end part of the corrugated tube 9e and the supporting plate 3 with holes is completed.

As some alternative embodiments of the present application, the outer end of the second external thread cylinder 9g is provided with a second friction increasing ring 9g1 coaxial therewith, so as to screw the second external thread cylinder 9g into the second internal thread ring 3a 1.

As shown in fig. 3 and 8, further: 1 still include spacing 1c and spacing 1d, spacing 1c equipartition is at the inner wall of filtering main part 1, and spacing 1c extends along the axis direction of filtering main part 1, is provided with on the periphery of foraminiferous layer board 3 with spacing 1c sliding fit's first notch 3b, be provided with on the periphery of foraminiferous roof 4 with spacing 1c sliding fit's second notch 4d, spacing 1d is fixed to be set up in spacing 1 c's bottom.

The inner wall of the filtering main body 1 is provided with the limiting strip 1c extending along the axial direction of the filtering main body, the porous supporting plate 3 is in sliding fit with the limiting strip 1c through the first notch 3b, the porous top plate 4 is in sliding fit with the limiting strip 1c through the second notch 4d, the porous supporting plate 3 and the porous top plate 4 can be prevented from rotating in the sliding process, meanwhile, the bottom end of the limiting strip 1c is provided with the limiting bolt 1d, the porous supporting plate 3 and the porous top plate 4 can be effectively prevented from being directly separated from the limiting strip 1c, and the initial height of the porous top plate 4 is limited.

The foregoing examples merely illustrate one or more embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (8)

1. The double-medium filter with the adjustable filter medium density comprises a filter main body (1), a perforated partition plate (2), a perforated supporting plate (3), a soluble pollutant adsorption medium (5) and an elastic medium filter medium (6), wherein a sewage inlet (1 a) and a clear water outlet (1 b) are arranged on the filter main body (1), and the sewage inlet (1 a) is lower than the clear water outlet (1 b), and is characterized by further comprising a belt Kong Dingban (4) and a connecting rod (7); the porous partition plate (2), the porous supporting plate (3) and the belt Kong Dingban (4) are sequentially and coaxially arranged in the filter main body (1) from top to bottom, the porous partition plate (2) is fixedly connected with the inner wall of the filter main body (1), the porous supporting plate (3) and the belt Kong Dingban (4) are fixedly connected with the inner wall of the filter main body (1), the porous partition plate (2), the porous supporting plate (3) and the belt Kong Dingban (4) are positioned between the sewage inlet (1 a) and the clear water outlet (1 b), and the aperture of the belt Kong Dingban (4) is adjustable;

the top end of the porous partition board (2) is filled with a soluble pollutant adsorption medium (5);

the elastic medium filter medium (6) is filled between the perforated baffle plate (2) and the perforated supporting plate (3);

the connecting rod (7) is fixedly connected with the supporting plate (3) with the hole and the belt Kong Dingban (4);

the tape Kong Dingban (4) comprises a plate body (4 a) and a rubber tube (4 b); the plate body (4 a) is coaxially and slidingly arranged in the filtering main body (1), the plate body (4 a) is fixedly connected with the supporting plate (3) with holes through the connecting rod (7), a cavity (4 a 1) is arranged in the plate body (4 a), and first through holes (4 a 2) which are coaxial with the plate body (4 a) are uniformly distributed on the plate body;

the rubber cylinder (4 b) is coaxially arranged in the first through hole (4 a 2), two ends of the rubber cylinder (4 b) are connected with the first through hole (4 a 2) at the upper end and the lower end in a sealing mode, and the inner diameter of the first through hole (4 a 2) is adjusted by adjusting the pressure of the cavity (4 a 1);

the pressure regulating mechanism (8) is communicated with the cavity (4 a 1) to regulate the pressure of the cavity, and the pressure regulating mechanism (8) comprises a sealing cylinder (8 a), a corrugated pipe (8 b), a piston (8 c), a polished rod (8 d) and a screw rod (8 e); the sealing cylinder (8 a) is arranged at the outer end of the filtering main body (1), and one end of the inner cavity of the sealing cylinder (8 a) is communicated with the cavity (4 a 1) through the corrugated pipe (8 b);

the piston (8 c) is coaxially and slidably arranged in the sealing cylinder (8 a);

the polish rod (8 d) is fixedly arranged in the sealing cylinder (8 a) in the same axial direction, and the polish rod (8 d) penetrates through the piston (8 c) and is in sliding fit with the piston;

the screw rod (8 e) is coaxially and rotatably arranged in the sealing cylinder (8 a), and the screw rod (8 e) penetrates through the piston (8 c) and is in threaded connection with the piston.

2. A dual media filter with adjustable filter media density according to claim 1, characterized in that the outer end of the first through hole (4 a 2) is provided with a first internal thread ring (4 a 3) coaxial therewith, the internal diameter of the first internal thread ring (4 a 3) being larger than the internal diameter of the first through hole (4 a 2); the two ends of the rubber cylinder (4 b) are provided with first ring parts (4 b 1) coaxial with the rubber cylinder, and the first ring parts (4 b 1) are coaxially abutted to the outer ends of the first through holes (4 a 2); the belt Kong Dingban (4) further comprises a first abutting ring (4 c), the first abutting ring (4 c) is coaxially abutted against the outer end of the first ring part (4 b 1), a first external thread cylinder (4 c 1) which is coaxial with the first abutting ring (4 c) is arranged on the periphery of the first abutting ring (4 c), and the first external thread cylinder (4 c 1) is in threaded connection with the first internal thread ring (4 a 3); the inner periphery of the first abutting ring (4 c) is provided with a second positioning cylinder (4 c 2) coaxial with the first abutting ring, and the end part of the rubber cylinder (4 b) is positioned between the inner periphery of the first through hole (4 a 2) and the outer periphery of the second positioning cylinder (4 c 2).

3. A dual media filter with adjustable filter media density according to claim 2, characterized in that the outer end of the first externally threaded cylinder (4 c 1) is provided with a first friction increasing ring (4 c 3) coaxial therewith.

4. A dual media filter with adjustable filter media density according to claim 1, further comprising an inter-space adjustment mechanism comprising a spindle mount (9 a), a spindle (9 b), a first link (9 c), a second link (9 d), a bellows (9 e) and a sealing cap (9 f); the perforated support plates (3) are linearly arranged in the filtering main body (1) at equal intervals, and second through holes (3 a) coaxial with the perforated support plates are arranged on the perforated support plates (3); the rotating shaft mounting piece (9 a) is coaxially arranged in the second through hole (3 a), and the rotating shaft (9 b) is radially arranged in the rotating shaft mounting piece (9 a);

the centering positions of the first connecting rod (9 c) and the second connecting rod (9 d) are rotatably arranged on the rotating shaft (9 b), the topmost first connecting rod (9 c) and the second connecting rod (9 d) are rotatably connected with the bottom end of the perforated partition plate (2), and the end parts of the first connecting rod (9 c) and the second connecting rod (9 d) which are adjacent up and down are rotatably connected;

the corrugated cylinders (9 e) are coaxially arranged at the top ends of the perforated supporting plates (3), the top ends of the corrugated cylinders (9 e) are in sealing connection with the structure at the top parts of the corrugated cylinders, and the first connecting rods (9 c) and the second connecting rods (9 d) are both positioned between the corrugated cylinders (9 e);

the sealing cover (9 f) is coaxially and hermetically arranged at the bottom end of the bottom-end perforated supporting plate (3).

5. A dual media filter with adjustable filter media density according to claim 4, characterized in that the shaft mounting (9 a) comprises two semicircular plugs (9 a 1) symmetrically arranged in the second through hole (3 a), the shaft (9 b) penetrates the two semicircular plugs (9 a 1) in radial direction, the symmetry plane of the semicircular plugs (9 a 1) is provided with a notch (9 a 2) penetrating along the axial direction, and the central positions of the first connecting rod (9 c) and the second connecting rod (9 d) are arranged in the symmetrical notch (9 a 2).

6. The dual media filter of claim 5, wherein the radial surface of the semicircular plug (9 a 1) is further provided with a positioning post (9 a 3) and a positioning groove (9 a 4), respectively.

7. A dual media filter with adjustable filter media density according to any of claims 4-6, characterized in that the second through hole (3 a) is provided with a second internal thread ring (3 a 1) coaxial with it at both ends, the internal diameter of the second internal thread ring (3 a 1) being larger than the diameter of the second through hole (3 a); the two ends of the corrugated cylinder (9 e) are provided with second ring parts (9 e 1) coaxial with the corrugated cylinder, the equal-interval adjusting mechanism further comprises a second external thread cylinder (9 g), the semicircular plug (9 a 1) is coaxially abutted against the end face of the second through hole (3 a), and the second external thread cylinder (9 g) is coaxially screwed in the second internal thread ring (3 a 1) and is abutted against the second ring parts (9 e 1).

8. The dual-medium filter with adjustable filter medium density according to claim 1, further comprising a limit bar (1 c) and a limit bolt (1 d), wherein the limit bar (1 c) is uniformly distributed on the inner wall of the filter main body (1), the limit bar (1 c) extends along the axial direction of the filter main body (1), a first notch (3 b) which is in sliding fit with the limit bar (1 c) is arranged on the circumferential surface of the perforated supporting plate (3), a second notch (4 d) which is in sliding fit with the limit bar (1 c) is arranged on the circumferential surface of the belt Kong Dingban (4), and the limit bolt (1 d) is fixedly arranged at the bottom end of the limit bar (1 c).

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