CN115159705A - Double-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 supporting plate, a soluble pollutant adsorption medium, an elastic medium filter medium, a perforated top plate and a connecting rod, wherein the filter main body is provided with a sewage inlet and a clean water outlet; the top end of the clapboard with holes is filled with the soluble pollutant adsorption medium; the elastic medium filter medium is filled between the clapboard with holes and the supporting plate with holes; connecting rod fixed connection foraminiferous layer board and foraminiferous roof, the height of foraminiferous layer board is adjusted through the aperture of adjusting foraminiferous roof in this application, and then can adjust filter medium's density, satisfies the filtration requirement of the sewage of different water conservancy characteristics.

Description

Double-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

The water inlet and tail water treatment of a sewage treatment plant, river water purification treatment, rainwater discharge treatment, rainwater and sewage confluence overflow treatment and the water inlet treatment of a tap water plant all need to use a filtering device, and the sewage treatment plant generally adopts a membrane method, such as an MBR (membrane bioreactor) process. Although the membrane method has high treatment efficiency, the method has large investment, high operation and maintenance cost and short service life and is not easy to popularize. Most of river water purification adopts integrated equipment, mainly comprises two types of magnetic separation and rapid flocculation and precipitation, but can not remove soluble pollutants, and has high operation and maintenance cost, so that the river water purification can only be used as temporary emergency treatment equipment, and the treatment is temporary and not permanent. Most rainwater treatment adopts sand filtration or sedimentation. The sand filtration occupies a large area, and can be placed in places which can not be found at the drain outlet, so that the sand filtration is hardly adopted in China. The sediment is high in cost and high in operation and maintenance cost, and can become a pollution source if the sediment is not maintained properly. Rain and sewage confluence overflow is the biggest problem in black and odorous river treatment, the method adopted at present is storage pond regulation and rapid flocculation and precipitation, the construction and operation and maintenance costs are high, and the method can only be popularized in big cities almost. Water works generally adopt sand filtration and membrane methods to treat inlet water, and either occupy large area or have high construction, operation and maintenance cost.

Chinese patent CN111530165A discloses a filter capable of adjusting density of a filter medium, which comprises a filter barrel, wherein a lead screw is rotatably connected to the upper part in the filter barrel and is driven by a manual or electric mode, a pressing plate is fixed at the lower end of the lead screw, the filter medium is arranged between the pressing plate and a bottom plate of the filter barrel, an air jet pipe is arranged in the filter barrel, a clear water outlet is arranged on the side wall of the upper part of the filter barrel, a cyclone is arranged below the bottom of the filter barrel and is connected with a sewage inlet, a backwashing water inlet is arranged on the side wall of the filter barrel, a backwashing sewage outlet is arranged on the side wall of the filter barrel, and differential pressure sensors are arranged below the pressing plate and above the bottom plate of the filter barrel.

The filter adjusts the height of the pressure plate through the screw rod, so that the density of a filter medium is adjusted, the screw rod is easily corroded in the actual use process, and the height of the pressure plate cannot be effectively adjusted.

Disclosure of Invention

To above-mentioned problem, provide a two medium filter of adjustable filter medium density, the aperture through the foraminiferous roof of regulation and adjust the height of foraminiferous layer board, and then can adjust filter medium's density, satisfy the filtering requirement of the sewage of different water nature characteristics, solved the lead screw and adjusted foraminiferous layer board and received the problem of erosion easily.

In order to solve the problems of the prior art, the invention adopts the technical scheme that:

a double-medium filter capable of adjusting the density of a filter medium comprises a filter main body, a perforated partition plate, a perforated supporting plate, a soluble pollutant adsorption medium, an elastic medium filter medium, a perforated top plate and a connecting rod, wherein a sewage inlet and a clean water outlet are formed in the filter main body, the sewage inlet is lower than the clean water outlet, the perforated partition plate, the perforated supporting plate and the perforated top plate are sequentially coaxially arranged in the filter main body from top to bottom, the perforated partition plate is fixedly connected with the inner wall of the filter main body, the perforated supporting plate and the perforated top plate are fixedly connected with the inner wall of the filter main body, the perforated partition plate, the perforated supporting plate and the perforated top plate are positioned between the sewage inlet and the clean water outlet, and the pore diameter of the perforated top plate is adjustable; the top end of the clapboard with holes is filled with the soluble pollutant adsorption medium; the elastic medium filter medium is filled between the clapboard with holes and the supporting plate with holes; the connecting rod is fixedly connected with the supporting plate with the hole and the top plate with the hole.

Preferably, the top plate with the hole comprises a plate body and a rubber cylinder; the plate body is coaxially and slidably arranged in the filtering main body, is fixedly connected with the supporting plate with the hole through a connecting rod, is internally provided with a cavity, and is uniformly provided with first through holes which are coaxial with the cavity; the rubber cylinder is coaxially arranged in the first through hole, two ends of the rubber cylinder are hermetically connected with the first through holes at the upper end and the lower end, and the inner diameter of the first through hole is adjusted by adjusting the pressure of the cavity.

Preferably, the outer end of the first through hole is provided with a first internal thread circle which is coaxial with the first through hole, and the inner diameter of the first internal thread circle 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 against 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 regulating mechanism, wherein the pressure regulating mechanism is communicated with the cavity and used for regulating the pressure of the cavity, and comprises a sealing cylinder, a corrugated pipe, a piston, a polish rod and a lead screw; 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 a corrugated pipe; the piston is coaxially and slidably arranged in the sealing cylinder; the polish rod is coaxially and fixedly arranged in the sealing cylinder, 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 further 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 supporting plate with holes is arranged in the filtering main body in an equidistant linear moving manner, and a second through hole coaxial with the supporting plate with holes is arranged on the supporting plate with holes; the rotating shaft mounting piece is coaxially arranged in the second through hole, and the rotating shaft is arranged in the rotating shaft mounting piece along the radial direction; 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 topmost ends are rotationally connected with the bottom end of the partition plate with the holes, 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 cylinder is coaxially arranged at the top end of the supporting plate with the hole, the top end of the corrugated cylinder is in sealing connection with a structure at the top of the corrugated cylinder, and the first connecting rod and the second connecting rod are both positioned between the corrugated cylinders; the sealing cover is coaxially and hermetically arranged at the bottom end of the bottommost supporting plate with the hole.

Preferably, the pivot installed part includes two symmetry sets up the semicircle stopper in the second through-hole, and the pivot radially runs through two semicircle stoppers, and the symmetry plane of semicircle stopper is provided with the notch that runs through along its axial, and the central point of first connecting rod and second connecting rod sets up in the notch of symmetry.

Preferably, the two sides of the radial surface of the semicircular plug are respectively provided with a positioning column and a positioning groove.

Preferably, two ends of the second through hole are provided with a second internal thread circle which is coaxial with the second through hole, and the inner diameter of the second internal thread circle 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 abutted against the second ring parts.

Preferably, still include spacing and spacing bolt, spacing equipartition is at the inner wall of filtering the main part, and spacing extends along the axis direction of filtering the main part, is provided with the first notch with spacing sliding fit on the periphery of foraminiferous layer board, is provided with the second notch with spacing sliding fit on the periphery of foraminiferous roof, and spacing bolt is fixed to be set up in the bottom of spacing.

Compared with the prior art, the beneficial effect of this application is:

1. the height of the supporting plate with the holes is adjusted by adjusting the aperture of the top plate with the holes, so that the density of a filter medium can be adjusted, and the filtering requirements of sewage with different water physical characteristics are met;

2. the invention adopts the principles of physical filtration and adsorption, does not need to add any chemical agent, can simultaneously remove granular and soluble pollutants, has high removal efficiency, does not have other operating expenses except energy consumption, and has low maintenance cost and small occupied space.

Drawings

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

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

FIG. 3 isbase:Sub>A sectional view at section A-A of FIG. 2;

FIG. 4 isbase:Sub>A perspective sectional view at section A-A of FIG. 2;

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

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

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

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

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

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

The reference numbers in the figures are:

1-a filter body; 1 a-a sewage inlet; 1 b-a clear water outlet; 1 c-a limiting strip; 1 d-a limit bolt; 1 e-backwash water inlet; 1 f-backwash water discharge port; 1 g-compressed air inlet; 1 h-an air injection pipe; 1 i-a feeding port of a plastic uptake medium for soluble pollutants; 1 j-a discharge port of a soluble pollutant adsorption medium; 2-a clapboard with holes; 3-a supporting plate with holes; 3 a-a second via; 3a 1-a second internally threaded ring; 3 b-a first notch; 4-a top plate with holes; 4 a-a plate body; 4a 1-cavity; 4a 2-first via; 4a 3-a first internally threaded ring; 4 b-a rubber cylinder; 4b 1-a first ring portion; 4 c-a first abutment ring; 4c 1-a first externally threaded barrel; 4c 3-a first friction-increasing ring; 4c 2-a second positioning cylinder; 4 d-a second notch; 5-a soluble contaminant adsorbent media; 6-an elastic media filter media; 7-a connecting rod; 8-a pressure regulating mechanism; 8 a-a sealed cartridge; 8 b-a bellows; 8 c-a piston; 8 d-polished rod; 8 e-a screw rod; 9 a-a spindle mount; 9a 1-half round stopper; 9a 2-notches; 9a 3-locating post; 9a 4-positioning groove; 9 b-a rotating shaft; 9 c-a first link; 9 d-a second link; 9 e-a bellows; 9e 1-second loop portion; 9 f-sealing cover; 9 g-a second externally threaded barrel; 9g 1-second friction increasing ring.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

As shown in fig. 1-10, the present application provides: a double-medium filter capable of adjusting the density of a filter medium 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 clean water outlet 1b are arranged on the filter main body 1, and the sewage inlet 1a is lower than the clean water outlet 1b;

the perforated partition plate 2, the perforated supporting plate 3 and the perforated top plate 4 are coaxially arranged in the filtering main body 1 from top to bottom in sequence, the perforated partition plate 2 is fixedly connected with the inner wall of the filtering main body 1, the perforated supporting plate 3 and the perforated top plate 4 are fixedly connected with the inner wall of the filtering main body 1, the perforated partition plate 2, the perforated supporting plate 3 and the perforated top plate 4 are positioned between the sewage inlet 1a and the clean water outlet 1b, and the pore diameter of the perforated top plate 4 is adjustable;

the soluble pollutant adsorption medium 5 is filled at the top end of the clapboard 2 with holes;

the elastic medium filtering medium 6 is filled between the clapboard 2 with holes and the supporting plate 3 with holes;

the connecting rod 7 is fixedly connected with the supporting plate 3 with the hole and the top plate 4 with the hole.

Sewage is discharged into the filtering main body 1 through the sewage inlet 1a, filtered by the soluble pollutant adsorption medium 5 and the elastic medium filtering medium 6 and then discharged through the clear 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, because the aperture of the perforated top plate 4 is adjustable, the resistance of the perforated top plates 4 with different apertures to the sewage is different, 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 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 mass of the elastic medium filtering medium 6 is constant, the density of the elastic medium filtering medium 6 can be increased, and the filtering requirements of the sewage with different physical characteristics are met;

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

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

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

The invention adopts the principles of physical filtration and adsorption, does not need to add any chemical agent, can simultaneously remove granular and soluble pollutants, has high removal efficiency, does not have other operating expenses except energy consumption, and has low maintenance cost and small occupied space.

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

the plate body 4a is coaxially and slidably arranged in the filtering main body 1, the plate body 4a is fixedly connected with the supporting plate 3 with the hole through a 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 tube 4b is coaxially arranged in the first through hole 4a2, two ends of the rubber tube 4b are hermetically connected with the first through holes 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 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 hermetically connected 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 the hole 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 body 1 is connected with the cavity 4a1 in the filter body 1, liquid or gas can be injected into the cavity 4a1 through the pipeline, so that the pressure of the cavity 4a1 is adjusted, the inner diameter of the rubber cylinder 4b is adjusted, the resistance of the top plate 4 with holes to sewage is adjusted according to different water management characteristics, and the height of the supporting plate 3 with holes is adjusted.

As shown in fig. 5, further: the outer end of the first through hole 4a2 is provided with a first internal thread circle 4a3 which is coaxial with the first through hole, and the inner diameter of the first internal thread circle 4a3 is larger than that of the first through hole 4a2; the two ends of the rubber tube 4b are provided with a first ring part 4b1 which is coaxial with the rubber tube, and the first ring part 4b1 is coaxially abutted against the outer end of the first through hole 4a2; the top plate 4 with the hole further comprises a first abutting ring 4c, the first abutting ring 4c is coaxially abutted to 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 abutting 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 tube 4b is provided with a first ring part 4b1 coaxial with the rubber tube, so that the rubber tube can be abutted against the outer end of the first ring part 4b2, the first external thread tube 4c1 is coaxially screwed in the first internal thread ring 4a3, so that the first abutting ring 4c can be abutted against the outer end of the first ring part 4b1, the rubber tube 4b can be stably arranged between the two first through holes 4a2, meanwhile, the second positioning tube 4c2 can abut two ports of the rubber tube 4b in the first through hole 4a2, and therefore the rubber tube 4b is prevented from directly separating from the first through hole 4a2 due to overlarge pressure of the cavity 4a 1.

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

Through set up rather than coaxial first increase friction ring 4c3 in the outer end of first external thread section of thick bamboo 4c1 for when installing rubber tube 4b, can be convenient for first external thread section of thick bamboo 4c1 is screwed in first internal thread circle 4a3 coaxially, the subsequent dismantlement of being convenient for simultaneously.

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

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

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

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

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

The sealing cylinder 8a is arranged outside the filtering main body 1, when the pressure of the cavity 4a1 needs to be adjusted, the screw rod 8e is rotated relative to the sealing cylinder 8a, the screw rod 8e is in threaded connection with the piston 8c, the polished rod 8d penetrates through the piston 8c and is in sliding fit with the piston, namely, the piston 8c moves in the sealing cylinder 8a, meanwhile, one end of the inner cavity of the sealing cylinder 8a is communicated with the cavity 4a1 through the corrugated pipe 8b, the pressure of the cavity 4a1 can be adjusted, the inner diameter of the rubber cylinder 4b is adjusted, and when the perforated top plate 4 moves in the filtering main body 1, the sealing cylinder 8a is connected with the cavity 4a1 through the corrugated pipe 8b, and 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 supporting plate 3 is linearly arranged in the filtering main body 1 at equal intervals, and a second through hole 3a coaxial with the perforated supporting plate 3 is arranged on the perforated supporting plate 3;

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

the middle positions of the first connecting rod 9c and the second connecting rod 9d are rotationally arranged on the rotating shaft 9b, the first connecting rod 9c and the second connecting rod 9d at the topmost ends are rotationally connected with the bottom end of the perforated 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 cylinder 9e is coaxially arranged at the top end of the supporting plate 3 with the holes, the top end of the corrugated cylinder 9e is hermetically connected with the structure at the top of the corrugated cylinder, and the first connecting rod 9c and the second connecting rod 9d are both positioned between the corrugated cylinders 9 e;

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

The supporting plates 3 with holes are linearly arranged in the filtering main body 1 at equal intervals, the elastic medium filtering medium 6 has elasticity, and meanwhile, the density of the elastic medium filtering medium 6 is gradually increased from top to bottom under the action of gravity in a natural state, namely the density of the elastic medium filtering medium 6 is always different no matter in the natural state or in a compressed state, so that the filtering effect is poor;

by dividing the elastic medium filtering medium 6 into a plurality of layers, when the bottommost perforated supporting plate 3 rises, all the perforated supporting plates 3 move linearly at equal intervals, and the influence of gravity is reduced, when the bottommost perforated supporting plate 3 is lifted upwards by the perforated top plate 4, all the perforated supporting plates 3 can move linearly at equal intervals under the action of a scissor structure because the rotating shaft mounting pieces 9a are coaxially arranged in the second through holes 3a and the rotating shafts 9b penetrate through the rotating shaft mounting pieces 9a along the radial direction, and meanwhile, because the adjacent perforated supporting plates 3 are rotatably connected through the first connecting rod 9c and the second connecting rod 9d, all the perforated supporting plates 3 can move linearly at equal intervals, and the top ends of the perforated supporting plates 3 are also provided with corrugated cylinders 9e which are in sealing connection with the top structures of the perforated supporting plates, so that the sewage and the elastic medium filtering medium 6 cannot influence the normal rotation of the first connecting rod 9c and the second connecting rod 9 d;

the sealing cover 9f can prevent the sewage from entering the bellows 9e through the second through-hole 3a of the lowermost end.

As shown in fig. 10, further: the rotating shaft mounting part 9a comprises two semicircular plugs 9a1 symmetrically arranged in the second through hole 3a, the rotating shaft 9b radially penetrates through the two semicircular plugs 9a1, a notch 9a2 axially penetrating through the symmetrical surface of the semicircular plug 9a1 is formed in the symmetrical surface, and the central positions of the first connecting rod 9c and the second connecting rod 9d are arranged in the symmetrical notches 9a 2.

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

As shown in fig. 10, further: and two sides of the radial surface of the semicircular plug 9a1 are respectively provided with a positioning column 9a3 and a positioning groove 9a4.

Two semicircle stopper 9a1 symmetry butt for the plane of symmetry of two semicircle stopper 9a1 passes through reference column 9a3 and constant head tank 9a4 looks gomphosis, can prevent that two semicircle stopper 9a1 from separating because of the atress axial force, with this stability that improves the structure.

As shown in fig. 10, further: two ends of the second through hole 3a are provided with a second internal thread ring 3a1 which is coaxial with the second through hole, and the inner diameter of the second internal thread ring 3a1 is larger than the diameter of the second through hole 3a; the two ends of the bellows 9e are provided with second ring parts 9e1 coaxial with the bellows, the equal interval adjusting mechanism further comprises a second external thread cylinder 9g, the semicircular plug 9a1 is coaxially abutted on the end face of the second through hole 3a, and the second external thread cylinder 9g is coaxially screwed in the second internal thread ring 3a1 and abutted on the second ring parts 9e 1.

And forming second ring parts 9e1 coaxial with the corrugated cylinder 9e at two ends of the corrugated cylinder 9e, abutting the second ring parts on the outer ends of the second through holes 3a, and then screwing a second external thread cylinder 9g in the second internal thread ring 3a1 coaxially, so that the second external thread cylinder 9g can abut on the outer ends of the second ring parts 9e1, thereby completing the connection of the end parts of the corrugated cylinder 9e and the perforated supporting plate 3.

As some alternative embodiments of the present application, the outer end of the second externally threaded cylinder 9g is provided with a second friction increasing ring 9g1 coaxial therewith to facilitate screwing the second externally threaded cylinder 9g in the second internally threaded ring 3a 1.

As shown in fig. 3 and 8, further: 1 still includes spacing 1c and spacing 1d of tieing, and 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, the fixed bottom that sets up at spacing 1c of tieing 1 d.

Set up along its axially extended spacing 1c at the inner wall of filtering main part 1, make foraminiferous layer board 3 through first notch 3b and spacing 1c sliding fit, and foraminiferous roof 4 is through second notch 4d and spacing 1c sliding fit, can prevent that foraminiferous layer board 3 and foraminiferous roof 4 from taking place rotatoryly at the slip in-process, set up spacing bolt 1d in spacing 1 c's bottom simultaneously, can prevent effectively that foraminiferous layer board 3 and foraminiferous roof 4 from directly breaking away from spacing 1c, thereby the initial height of foraminiferous roof 4 of restriction.

The above examples, which are intended to represent only one or more embodiments of the present invention, are described in greater detail and with greater particularity, and are not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A double-medium filter capable of adjusting the density of a filter medium 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 the filter main body (1) is provided with a sewage inlet (1 a) and a clean water outlet (1 b), and the sewage inlet (1 a) is lower than the clean water outlet (1 b), and is characterized by further comprising a perforated top plate (4) and a connecting rod (7); the filter is characterized in that a perforated partition plate (2), a perforated supporting plate (3) and a perforated top plate (4) are sequentially coaxially arranged in a filter main body (1) from top to bottom, the perforated partition plate (2) is fixedly connected with the inner wall of the filter main body (1), the perforated supporting plate (3) and the perforated top plate (4) are fixedly connected with the inner wall of the filter main body (1), the perforated partition plate (2), the perforated supporting plate (3) and the perforated top plate (4) are positioned between a sewage inlet (1 a) and a clean water outlet (1 b), and the aperture of the perforated top plate (4) is adjustable;

the top end of the clapboard (2) with the holes is filled with the soluble pollutant adsorption medium (5);

the elastic medium filter medium (6) is filled between the perforated partition 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 top plate (4) with the hole.

2. The dual media filter for adjusting the density of filter media according to claim 1, wherein the perforated top plate (4) comprises a plate body (4 a) and a rubber cylinder (4 b); the plate body (4 a) is coaxially and slidably arranged in the filtering main body (1), the plate body (4 a) is fixedly connected with the supporting plate (3) with the hole through a 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 (4 a);

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

3. The dual media filter capable of adjusting the density of the filter media according to claim 2, wherein the outer end of the first through hole (4 a 2) is provided with a first internally threaded ring (4 a 3) coaxial therewith, and the inner diameter of the first internally threaded ring (4 a 3) is larger than that of the first through hole (4 a 2); two ends of the rubber cylinder (4 b) are provided with first ring parts (4 b 1) which are coaxial with the rubber cylinder, and the first ring parts (4 b 1) are coaxially abutted against the outer ends of the first through holes (4 a 2); the top plate (4) with the hole further comprises a first abutting ring (4 c), the first abutting ring (4 c) is coaxially abutted to the outer end of the first ring part (4 b 1), a first external thread cylinder (4 c 1) 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).

4. An adjustable filter media density dual media filter according to claim 3, wherein the outer end of the first externally threaded cartridge (4 c 1) is provided with a first friction increasing ring (4 c 3) coaxial therewith.

5. The dual media filter capable of adjusting the density of the filtering media according to any one of claims 2 to 4, further comprising a pressure adjusting mechanism (8), wherein the pressure adjusting mechanism (8) is communicated with the cavity (4 a 1) to adjust the pressure thereof, and the pressure adjusting mechanism (8) comprises a sealing cylinder (8 a), a bellows (8 b), a piston (8 c), a polish rod (8 d) and a lead screw (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 a 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 coaxially and fixedly arranged in the sealing cylinder (8 a), and the polish rod (8 d) penetrates through the piston (8 c) and is in sliding fit with the piston;

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

6. The dual media filter for adjusting density of filter media of claim 1, further comprising an inter-adjustment mechanism comprising a spindle mounting member (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 supporting plate (3) is linearly arranged in the filtering main body (1) at equal intervals, and a second through hole (3 a) coaxial with the perforated supporting plate (3) is arranged on the perforated supporting plate; the rotating shaft mounting part (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 part (9 a);

the middle positions of the first connecting rod (9 c) and the second connecting rod (9 d) are rotationally arranged on the rotating shaft (9 b), the first connecting rod (9 c) and the second connecting rod (9 d) at the topmost ends are rotationally connected with the bottom end of the partition plate (2) with the holes, 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 rotationally connected;

the corrugated cylinder (9 e) is coaxially arranged at the top end of the supporting plate (3) with the hole, the top end of the corrugated cylinder (9 e) is connected with the structure at the top of the corrugated cylinder in a sealing way, and the first connecting rod (9 c) and the second connecting rod (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-most perforated supporting plate (3).

7. The dual media filter for adjusting the density of the filter media according to claim 6, wherein the shaft mounting member (9 a) comprises two semicircular plugs (9 a 1) symmetrically disposed in the second through hole (3 a), the shaft (9 b) radially penetrates the two semicircular plugs (9 a 1), the symmetrical surface of the semicircular plugs (9 a 1) is provided with notches (9 a 2) axially penetrating the semicircular plugs, and the central positions of the first connecting rod (9 c) and the second connecting rod (9 d) are disposed in the symmetrical notches (9 a 2).

8. The dual-media filter capable of adjusting the density of the filter media according to claim 7, wherein the semicircular plug (9 a 1) is further provided with a positioning column (9 a 3) and a positioning groove (9 a 4) on two sides of the radial surface.

9. The dual media filter capable of adjusting the density of the filter media according to any one of claims 6 to 7, wherein both ends of the second through hole (3 a) are provided with a second internally threaded ring (3 a 1) coaxial therewith, and the inner diameter of the second internally threaded ring (3 a 1) is 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 to 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 abutted to the second ring parts (9 e 1).

10. The dual-media filter capable of adjusting the density of the filter media according to claim 1, further comprising a limiting strip (1 c) and a limiting bolt (1 d), wherein the limiting strip (1 c) is uniformly distributed on the inner wall of the filter body (1), the limiting strip (1 c) extends along the axis direction of the filter body (1), a first notch (3 b) in sliding fit with the limiting strip (1 c) is formed in the circumferential surface of the perforated supporting plate (3), a second notch (4 d) in sliding fit with the limiting strip (1 c) is formed in the circumferential surface of the perforated top plate (4), and the limiting bolt (1 d) is fixedly arranged at the bottom end of the limiting strip (1 c).

Images