50 results about "Unfiltered" patented technology

The utility model provides an automatic oil return device which solves the problems that in the prior art, an automatic oil return device lacks an effective control structure, when a compressor is in a load-reducing state and lubricating oil in an oil collecting barrel is rapidly pumped out, a main engine of the compressor still continues to pump the lubricating oil which does not exist in the oil collecting barrel, and the working efficiency is high. And normal operation of the compressor is damaged due to the fact that air which is not filtered is extracted. The utility model provides an automatic oil return device which comprises an oil tank, an oil pumping pipe, a normally open stop valve and a suction assembly, the oil inlet end of the oil pumping pipe is connected with the oil tank, the oil outlet end of the oil pumping pipe is connected with an air suction low-pressure cavity of a main machine through the normally open stop valve and a vacuum generator of the suction assembly, and the normally open stop valve is connected with an electromagnetic valve of the suction assembly. When the electromagnetic valve loses power, the normally-open stop valve is closed under the action of gas through gas path switching, the oil pumping pipe is blocked, and the compressor main machine is prevented from continuously pumping non-existing lubricating oil or unfiltered air.

This utility model belongs to the field of aquaculture equipment technology and provides a bottom-opening exhaust curtain device for aquaculture. The device includes a drive motor, a transmission mechanism, and an exhaust curtain. The drive motor drives and connects to the transmission mechanism, which includes a main steel wire rope and multiple auxiliary steel wire ropes extending from the main steel wire rope. The top of the exhaust curtain is fixed above the window structure, and the bottom of the exhaust curtain is provided with a suspension pipe connected to each auxiliary steel wire rope. The drive motor can change the opening degree of the exhaust curtain through the transmission mechanism, thereby adjusting the exhaust area of ​​the window structure. The device proposed in this utility model can make the opening stroke of the curtain consistent at all points, thereby allowing for precise and flexible adjustment of the exhaust area, ensuring that the aquaculture shed achieves the best ventilation effect, effectively preventing unfiltered air from outside the aquaculture shed from flowing back and polluting the air inside, optimizing the safety and epidemic prevention effect, and has the advantages of low cost, simple structure, and durability.

The invention discloses an engineering machine hydraulic system and an engineering machine, and belongs to the technical field of engineering machine lubrication and control hydraulic systems, the hydraulic system comprises a filter, an oil inlet of the filter is communicated with an outlet of a hydraulic pump, and an oil outlet is connected with a working device; an oil inlet of the constant pressure difference valve is connected with an oil inlet of the filter, an oil outlet of the constant pressure difference valve is connected with an oil inlet of the radiator, a control end of the constant pressure difference valve is communicated with the oil inlet of the filter, and a spring end of the constant pressure difference valve is connected with an oil outlet of the filter; an oil outlet of the radiator is communicated with the oil tank, and an oil inlet of the radiator is communicated with an oil outlet of the working device. According to the invention, unfiltered hydraulic oil is effectively prevented from entering the control system, and the filter is replaced according to the normal maintenance period of the machine without warning and replacing the filter, so that the risks of clamping stagnation and failure of the control system are reduced, and the use and maintenance cost of the filter is relatively low.

The silicone oil treatment device comprises a supporting frame, a driving assembly is arranged on the outer side of the supporting frame, the driving assembly comprises a motor fixedly connected to the upper end of the supporting frame, the output end of the motor is fixedly connected with a rotating shaft, the upper end of the supporting frame is fixedly connected with a treatment box, and the upper end of the treatment box is fixedly connected with a motor. Through cooperation of the supporting frame, the treatment box, the driving assembly, the impurity removing assembly, the feeding frame and the filtering assembly, impurities on the surface of the filtering net can be pushed out of the feeding frame, the situation that due to the impurities, a filtering channel is narrowed, the filtering efficiency is reduced, and continuous accumulation of the impurities on the surface of the filtering net is avoided; and if the pressure exceeds the bearing range of the equipment, the filter screen is possibly damaged, and unfiltered impurities are mixed into the treated silicone oil, so that the purity and the subsequent use effect of the silicone oil are influenced.

The utility model relates to a whole-house ultrafiltration water purifier, which comprises an ultrafiltration filter element, a water inlet pipe, a water outlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipe and a water outlet pipe, a first containing cavity and a second containing cavity are formed in the ultrafiltration cylinder body, the ultrafiltration filter element is installed in the first containing cavity, and the two sides of the ultrafiltration membrane of the ultrafiltration filter element are communicated with the first containing cavity and the second containing cavity respectively; the water inlet is communicated with the first accommodating cavity and is used for inputting raw water into the first accommodating cavity; the straight water port is communicated with the first accommodating cavity and is used for outputting unfiltered raw water in the first accommodating cavity; and the purified water port is communicated with the second accommodating cavity and is used for outputting the purified water in the second accommodating cavity. The problems that a whole-house ultrafiltration water purifier adopting a carbon filtration and sand filtration combined process at present needs a large space, and filter materials are troublesome to replace are mainly solved.

A dishwasher includes a filter member having a handle integrally provided at an upper cover of the filter member. The filter member is accommodated in a filter accommodation space of a filter housing, where a movement space of the filter member is larger than the filter member, thereby preventing damage to the filter material or a fall of contaminants into the filter housing effectively, during withdrawal and insertion of the filter member. A separation space defined between the filter housing and the upper cover of the filter member is closed by a gasket, in the state where the filter member is disposed in the filter housing completely, thereby preventing the flow of non-filtered air into the filter housing effectively.

The utility model relates to the technical field of filter equipment, and discloses a convenient-to-replace filter element for a filter, which comprises a shell, the top of the shell is in threaded connection with a sealing cover, the bottom of the shell is fixedly connected with a placing block, the inside of the placing block is fixedly connected with an auxiliary component, and the auxiliary component is fixedly connected with the sealing cover. And the auxiliary assembly comprises a reset spring, a telescopic column and a mounting plate, and a connecting block is connected to the surface of the mounting plate in an inserted mode. According to the filter element convenient to replace for the filter, through the arrangement of the auxiliary assembly and the sealing assembly, when the filter element cylinder is replaced, a sealing cover is unscrewed, and a reset spring drives a telescopic column to reset, so that a mounting plate drives the filter element cylinder to pop up, and the filter element cylinder can be rapidly and conveniently replaced; a sealing spring in a sealing cover is extruded, so that a sealing gasket is tightly attached to the filter element cylinder, and the situation that unfiltered water flows out of a connector, and the using effect of the device is affected is avoided.

The utility model discloses a multifunctional drainage liquid oral taking cup, and relates to the technical field of drinking cups. The multifunctional drainage liquid oral taking cup comprises a cup body and a cup cover, the cup cover covers the top of the cup body, a drainage liquid injection opening and a drainage liquid direct drinking opening are formed in the two sides of the top of the cup cover respectively, the drainage liquid injection opening and the drainage liquid direct drinking opening are separated, unfiltered drainage liquid can be prevented from being directly drunk, and the multifunctional drainage liquid oral taking cup is provided with a double-drinking-opening flip cover design. Daily sealing protection of the drainage liquid injection opening and the drainage liquid direct drinking opening is achieved, particularly, the sealing rubber plug is arranged in the outer cover covering the drainage liquid direct drinking opening, the sealing performance is further improved, the smell of the drainage liquid can be covered, the discomfort of a patient taking the drainage liquid is relieved, and the drainage liquid can be prevented from being poured easily. And besides the use of medical consumables is saved, the convenience of filtering the drainage liquid is also increased, and the backflow prevention design can also prevent a patient from pouring out the drainage liquid from the drainage liquid injection port by mistake for drinking, so that the use is convenient.

The utility model relates to the technical field of distillation and filtration, and discloses a filtering mechanism of a distillation device, which is provided with a cleaning device and an auxiliary mechanism, the cleaning device is used for cleaning impurities, and the auxiliary mechanism is used for collecting the impurities. The utility model solves the problems that an existing distillation device always faces a series of challenges due to lack of an effective mechanism for filtering impurities in water, so that the distillation efficiency is reduced, the equipment is damaged, the product quality is influenced, the maintenance cost is increased, and in the distillation process, if the impurities in raw water are not effectively filtered, the equipment cannot be used for filtering the impurities in the raw water. The impurities may interfere with the distillation process, so that the distillation efficiency is reduced, the distillation process needs longer time to be completed, and the energy consumption and the production cost are increased, in addition, unfiltered impurities may block a pipeline or accumulate at key parts of a distillation device, and long-time accumulation may cause the performance reduction and even damage of equipment.

The application relates to the dust removal technical field, in particular to a bag type dust collector, which comprises a dust removal box, dust removal bags, an adjusting unit and a back blowing unit. The dust removal bags are arranged in the dust removal box. The upper end of each dust removal bag is provided with a vertical guide cylinder fixedly connected with a partition plate. The adjusting unit corresponds to each dust removal bag and comprises a supporting cylinder, a baffle, a sliding cylinder and a one-way component. The baffle is arranged below the guide cylinder and defines an air inlet channel together with the guide cylinder. The cooperation of the baffle and the one-way component enables the dust removal bag to trigger the baffle to move and close the air inlet channel when the dust removal bag is damaged, so that the unfiltered flue gas in the dust removal bag is prevented from escaping. When multiple dust removal bags are used simultaneously, the normal work of other dust removal bags is not affected, and the dust removal bags do not need to be replaced during shutdown. The baffle can also temporarily close the air inlet channel of the undamaged dust removal bag when the back blowing unit blows back, thereby reducing the backflow of the back blowing gas and improving the utilization rate of the back blowing gas.

The utility model relates to the technical field of combustion equipment, and discloses an oxygen-enriched combustor which comprises a base, a combustion mechanism is fixedly connected to the upper surface of the base, a suction fan is arranged on the upper surface of the base and communicated with the combustion mechanism through a pipeline, the front side of the suction fan is fixedly connected with an air inlet pipeline, and the air inlet pipeline is communicated with the combustion mechanism. Fixing blocks are fixedly connected to the surfaces of the two sides of the air inlet pipeline, a sealing plate is arranged between the two fixing blocks, a shaft body is fixedly arranged in the sealing plate in a sleeving mode, the sealing plate is rotationally connected between the two fixing blocks through the shaft body, and a through groove communicating with the interior is formed in the upper surface of the air inlet pipeline; and the situation that external air enters the air inlet pipeline after the filter plate is detached is avoided as much as possible, so that the situation that unfiltered air is sucked in subsequently is avoided, the subsequent combustion efficiency and effect are guaranteed, the combustion sufficiency is improved, and the practicability of the device is further improved.

The utility model discloses an explosion-proof cloth bag dust collector for a coal mill system, which relates to the technical field of cloth bag dust collectors, and comprises a bottom plate, a box body is arranged on the outer wall of the top of the bottom plate, a partition plate is welded on the inner wall of the box body, a mounting hole is formed in the center of the partition plate, a connecting groove is formed in the inner wall of the mounting hole, and the connecting groove is communicated with the box body. The outer wall of the connecting groove is rotationally connected with a dust removal bag through threads, and a supporting frame is arranged on the inner wall of the connecting groove. According to the dust removal device, the dust removal bag purifies air, when the pressure in the box body is too large or the temperature is too high, unfiltered air in the box body is guided into the pressure relief box through the pressure relief pipe, and the air pressure and the temperature in the box body are gradually reduced along with the fact that high-temperature air in the box body is guided out; the dust collector is prevented from exploding by reducing the temperature and air pressure in the box body, compared with a traditional dust collector, the air pressure and temperature in the dust collector are reduced by exhausting air in time, and dust explosion caused by too high air pressure in the dust collector is prevented.

The present document describes a method (400) for rendering an ambisonics signal using a loudspeaker arrangement comprising S loudspeakers. The method (400) comprises converting (401) a set of N ambisonics channel signals (111) into a set of unfiltered pre-rendered signals (211), with N>1 and S>1. Furthermore, the method (400) comprises performing (402) near field compensation, referred to as NFC, filtering of M unfiltered pre-rendered signals (211) of the set of unfiltered pre-rendered signals (211) to provide a set of S filtered loudspeaker channel signals (114) for rendering using the corresponding S loudspeakers.

The utility model discloses a direct water dispenser with a circulation structure, and particularly relates to the field of direct water dispensers, which comprises a shell, a partition plate is fixedly mounted on the inner side wall of the shell, a mounting cavity is formed in the shell, a water adding pipe is fixedly mounted on one side of the shell, and a water outlet is formed in the other side of the shell. And one end of the water adding pipe penetrates through one side of the shell and extends into the mounting cavity to be provided with a coarse filtering device, and the output end of the coarse filtering device fixedly communicates with a water storage tank. When the water supply device is used, the operation is simple, an external unfiltered water source can be conveyed into the coarse filtering device through the water supply pipe to be preliminarily filtered, then the coarse filtering device can convey the water source into the water storage tank, and the circulating device is used for enabling the filtered water to continuously and circularly flow through the circulating pump; the water is filtered again through the multi-stage filtering device, so that the filtering effect and the water quality stability are improved, and the cleaning device can clean impurities on the inner wall of the water storage tank.

The invention belongs to the technical field of medical instruments, particularly relates to a using method of a negative-pressure isolation incubator for newborns, and aims to solve the problems that an existing incubator is difficult to comprehensively and reliably seal, external unfiltered air easily enters the incubator, and the risk that the newborns are infected with germs and make contact with harmful substances is increased. The method comprises the following steps: S1, a placement stage: opening an outer box, laying the bed sheet on a bed board, fixing the bed sheet through a fixing frame, and closing the outer box after the baby is placed; according to the invention, external pollution is effectively isolated through a multi-sealing structure, high-efficiency air circulation and isolation design is matched, internal air is ensured to be pure, an operation hole is flexibly sealed and matched with a rubber sleeve, operation convenience and safety are considered, a bed body is comfortable and stable, and the inclination angle can be flexibly adjusted to meet various requirements; the lifting system is stable and accurate, and safety and comfort of the newborns are guaranteed comprehensively.

The utility model belongs to the technical field of oil filters, and discloses an automobile oil filter structure. Comprising a bucket-shaped shell with an opening in one end, a base plate arranged at the opening end of the shell, a center pipe arranged in the shell and coaxial with the shell, a filter paper layer mechanism arranged outside the center pipe in a sleeving mode and used for filtering engine oil and an overflow valve arranged at the end, away from the opening end of the shell, in the center pipe, and a plurality of oil inlet holes are formed in the base plate in an annular array mode. A check valve is arranged at the bottom of the base plate and right opposite to the oil inlet hole, a plurality of oil through holes are formed in the center pipe, a sealing ring used for installing a filter in a sealing mode is further arranged on the outer side of the base plate, and a second-order filtering assembly used for filtering engine oil passing through the overflow valve is further arranged at the oil outlet end of the center pipe. According to the engine oil filtering device, engine oil impurities can be filtered in a distributed mode, the filtering effect is improved, engine oil passing through the overflow valve is filtered, and irreversible damage to an engine caused by the fact that unfiltered engine oil enters an engine oil way is avoided.

This utility model relates to the field of HVAC technology and discloses an HVAC filtration device that facilitates filter replacement. It includes an air inlet pipe with a quick-release mechanism for easy component maintenance. A fixing plate is symmetrically installed on the inner wall of the air inlet pipe, and a rubber pad is fixedly installed in the dovetail groove inside the fixing plate. This utility model employs an interlocking structure of the dovetail block and the dovetail groove of the fixing plate, along with a quick-locking mechanism using a baffle and a locking rod. Without the need for any tools, operators can easily disassemble and assemble the filter plate in a short time with simple push-pull and rotation actions. This simplifies the filter replacement process, improves replacement efficiency, and reduces maintenance costs. Simultaneously, the rubber pad deforms under pressure during filter plate installation, tightly filling the gap between the filter plate and the dovetail groove of the fixing plate, effectively preventing unfiltered air from leaking out, ensuring air filtration effect, and improving the operating quality of the HVAC system.

One end of a spring of a bypass valve of the engine oil filter is connected with a valve cover, the other end of the spring of the bypass valve is connected to the bottom face of a shell, a hollow filter screen ring is fixedly arranged above a valve port in a sleeved mode, the valve cover is tightly attached to the inner wall of the filter screen ring when passing through the filter screen ring, and the top end of the filter screen ring is lower than the maximum stroke height of the valve cover. The filter screen ring forms a buffering mechanism for opening the bypass valve, engine oil needs to penetrate through the filter screen ring to enter the center pipeline within a section of stroke when the valve cover starts to move upwards, the engine oil cannot be filtered immediately, and the situation that unfiltered engine oil enters the engine at will when too much engine oil is not needed immediately can be avoided. When a large amount of engine oil is actually needed to be supplied to the engine, the valve cover pulls the spring to continue to rise to the top end of the ultra-filtering net ring under the pressure effect, the engine oil is not blocked, rapid supply of the engine oil is not affected, and therefore the engine is buffered and protected on the premise that normal work of the engine oil filter is not affected.

The utility model discloses a high-stability hydraulic oil filter. The other cover plate is provided with a sealing gasket; the cover plate provided with the bypass valve is provided with a positioning seat; the positioning seat is provided with a positioning groove; one side, facing the cover plate, of the positioning seat is provided with an input hole, the input hole is communicated with the bypass valve; the supporting protrusions extend outwards, part of the supporting protrusions penetrate to the outer side of the cover body, the ends, away from the cover plate, of the supporting protrusions are provided with arc-shaped abutting edges, the supporting protrusions are distributed in the circumferential direction, guide-in holes are formed between the adjacent supporting protrusions, and the guide-in holes are communicated with the input hole. The situation that unfiltered hydraulic oil enters follow-up equipment is avoided, the service life of the equipment can be effectively prolonged, the size of the leading-in hole is stable, the flow speed of the hydraulic oil during bypass can be guaranteed, and the oil supply efficiency is guaranteed.

The invention relates to a method for pickling a steel sheet 8, said steel sheet being continuously immersed in a pickling bath 1 containing a pickling solution 10, said bath being connected to a treatment unit comprising a recirculation tank 3, circulation means 12 and 13, a continuous inlet stream 11 of said solution being fed from the recirculation tank 3 into an ultrafiltration means 2 and both streams leaving the ultrafiltration means, a filtered exit stream 21 is then fed back into the recirculation tank 3 and an unfiltered stream 22, the treatment unit not comprising a storage tank.

A high-speed hydraulic rotary joint includes a rotary inlet pipe and a bearing coaxially arranged with the rotary inlet pipe; the right end of the rotary inlet pipe is fixedly connected to the left side of the outer ring of the bearing, and a rotary outlet pipe is coaxially fixed to the right side of the inner ring of the bearing; a quick-release unit is coaxially arranged at the left end of the rotary inlet pipe, the quick-release unit including a rotary joint, a rotation limiting sleeve, and a translation limiting sleeve; the right end of the rotary joint is coaxially fixed with the rotary inlet pipe and its inner cavity is connected; a rotation limiting sleeve is sleeved on the outer side of the left end of the rotary joint, and a rotation limiting groove with an opening at the right end is formed axially on the cylindrical wall of the rotation limiting sleeve; a translation limiting sleeve is sleeved on the outer side of the rotation limiting sleeve. It is slidably connected to the rotating limiting sleeve, and the cylindrical wall of the translation limiting sleeve is inclined along the circumference with a translation limiting groove with an opening at the right end; the circumferential surface of the rotary joint is provided with a cylindrical limiting pin along the radial direction; the limiting pin passes through the limiting space formed by the intersection of the rotating limiting groove and the translation limiting groove; it can not only filter and clean the fluid medium in the high-speed hydraulic rotary joint and collect solid impurities in the fluid medium; but also cut off the unfiltered fluid medium from entering the equipment after the solid impurities in the filter unit reach a certain amount, and at the same time prompt the filter unit to be replaced to prevent solid impurities from entering the equipment through the fluid medium.

The invention provides a dust treatment device and a lepidolite mixed roasting treatment method. Relates to the field of dust treatment, in particular to a dust treatment device which comprises a treatment box, and a first air inducing opening, a first sewage draining opening, a second air inducing opening and a second sewage draining opening are formed in the bottom of the treatment box. According to the dust treatment device and the lepidolite mixed roasting treatment method, three air pressure sensors are arranged to detect the pressure difference, an air cylinder is started to switch a filter plate to filter dusty gas, and a push plate is arranged to drive an opening and closing plate to gradually close an air inlet till the air inlet is completely closed and then is opened again in the filter plate switching process; the problem that unfiltered dust-containing gas directly escapes from an open waste discharge port to cause cleaning failure is avoided, a first baffle and a second baffle are arranged to control two first switches to automatically start a cleaning motor to clean a blocked filter plate, and the cleaning efficiency is improved while the mixing continuity is guaranteed. Dust is prevented from escaping and the environment is protected while dust treatment is achieved and the polluted environment is controlled.

The utility model relates to the technical field of fresh air machines, and discloses a fresh air machine shell capable of reducing the air leakage rate, which comprises a fresh air machine shell body of which the upper side surface and the lower side surface are in bolted connection with an access cover, and a first moving frame sleeved on the rear side of the surface of the fresh air machine shell body, and further comprises a second moving frame arranged behind the first moving frame, a sealing cover body is fixed between the first moving frame and the second moving frame, and sealing air bags are fixed to the surfaces of the inner walls of the first moving frame and the second moving frame. The novel fan has a sealing effect, the stretchable sealing cover is arranged on the outer side of the shell of the novel fan, the whole shell is wrapped and sealed by stretching the sealing cover, a gap between the shell and the surrounding environment can be effectively filled, the air leakage phenomenon is reduced, and the sealing performance of the novel fan is improved; the air leakage rate is reduced, unfiltered air can be effectively prevented from entering a room, the quality of fresh air entering the room is ensured, the indoor air quality is improved, and a healthier and more comfortable living environment is provided for users.

The invention discloses an all-season positive-pressure air filtering and centralized exhausting animal house building and a method thereof, and belongs to the technical field of livestock breeding, the animal house building comprises an animal house building main body, and a plurality of house rooms distributed side by side are arranged in each floor of the animal house building main body at intervals; the top of each floor of the animal house building main body is provided with a ventilation pipeline passing through all houses of the floor; an integrated air supply box located at the front end of the animal house building body is installed at the air inlet end of the ventilation pipeline, a positive pressure fan for blowing fresh air into the ventilation pipeline is installed in the integrated air supply box, and air inlet windows connected with all house rooms are formed in the bottoms of all the ventilation pipelines. According to the animal house building, fresh air is fed into the house rooms in a positive pressure ventilation mode, compared with a traditional negative pressure ventilation mode, unfiltered airflow is prevented from flowing into the house rooms, and the probability that livestock get ill is greatly reduced.

The utility model discloses a shower nozzle which comprises a shell provided with a water inlet; the sealing cover is detachably connected with the shell to form a filtering cavity; the filter element is arranged in the filter cavity, the filter element comprises a water inlet end and a water outlet end, unfiltered water enters the filter element through the water inlet and the water inlet end in sequence, and the filtered water flows out of the filter element through the water outlet end; a plurality of spraying holes are formed in the panel assembly, the panel assembly is arranged on the shell, the panel assembly is provided with a spraying cavity, and filtered water enters the spraying cavity and is sprayed out through the spraying holes; the sealing cover blocks the water inlet direction of the water inlet end, and unfiltered water is bent at the sealing cover and enters the water inlet end; or the sealing cover blocks the water outlet direction of the water outlet end, and the filtered water is bent at the sealing cover and enters the spraying cavity. According to the shower nozzle, the filter element can be conveniently replaced in the using process.

The utility model relates to the technical field of sewage treatment equipment, in particular to an ecological purification tank which comprises a first drainage pipe, a purification tank body and a second drainage pipe which are sequentially connected, four layers of cleaning baskets are arranged in the purification tank body from bottom to top, and the outer surfaces of the peripheries of the cleaning baskets are attached to the inner walls of the four sides of the purification tank body respectively, so that all sewage flows through a filter material; unfiltered sewage is prevented from flowing to the upper layer; a cobblestone layer, a gravel layer, a fine sand layer and a planting soil layer are sequentially laid in the four layers of cleaning baskets from bottom to top in a layered mode, plants are planted in the planting soil layer, and the particle sizes of the cobblestone layer, the gravel layer and the fine sand layer are all larger than the hole diameter of the cleaning baskets, so that cobblestone, gravel and fine sand are prevented from falling off from holes of the cleaning baskets and then being mixed, and the layered filtering effect is prevented from losing. The cleaning basket is arranged, when the filter material needs to be cleaned, the cleaning basket is pulled out, and garbage and impurities attached to the surface of the filter material can be cleaned, so that the garbage and the impurities are prevented from being accumulated, and the sewage filtering effect is prevented from being influenced.

The utility model relates to the field of air purifiers, and discloses an HEPA filter screen sealing and fixing assembly of an air purifier, the HEPA filter screen sealing and fixing assembly of the air purifier comprises a purification inner cylinder fixedly installed in the air purifier and an HEPA filter screen arranged in the purification inner cylinder, the HEPA filter screen comprises an outer frame and an HEPA filter element, the HEPA filter element is fixedly installed in the outer frame, and the HEPA filter element is fixedly installed in the outer frame. A bearing ring located below the HEPA filter screen is fixedly installed in the purification inner cylinder, and a lower sealing ring is fixedly installed at the top of the bearing ring. Compared with the prior art, the air purifier has the following advantages and effects that the HEPA filter screen can be conveniently installed and fixed and disassembled, taken out and replaced, operation is convenient and labor-saving, double sealing of the upper end and the lower end of the HEPA filter screen can be achieved when the HEPA filter screen is well installed and fixed and used, unfiltered air is effectively prevented from penetrating through a gap between the HEPA filter screen and the purification inner cylinder, and the air purifier is convenient to use. The sealing performance of the HEPA filter screen in the mounting, fixing and using period is improved, and the filtering effect of the air purifier is greatly improved.

The utility model provides a quartz sand filter with a filter cap convenient to replace, which belongs to the technical field of quartz sand filters and comprises a filter body, a support frame is arranged at the bottom of the filter body, a filter plate is arranged in the support frame and the filter body, and support legs are arranged at the bottom of the filter plate. One end of each supporting leg is fixedly connected with the peripheral side of the bottom of the filter plate, the other end of each supporting leg is fixedly connected with the inner wall surface of the filter body, a plurality of filter caps are arranged on the upper surface of the filter plate, and sealing gaskets are arranged between the filter caps and the filter plate. The quartz sand filter solves the problems that in the back washing process of an existing quartz sand filter, a filter cap is damaged and loosened due to the fact that water flow is too large, the sealing performance between the filter cap and a filter plate is greatly reduced in the filtering process, unfiltered water flow enters a water outlet system through a gap, water quality is affected, and the service life of the filter cap is prolonged. And meanwhile, the simple design of the filter cap can cause non-uniform water flow distribution or dead angles to influence the flushing effect.

The utility model provides an industrial filter element which belongs to the field of filter elements and comprises a shell, a sealing cover is arranged on the shell, a filter element body is arranged in the shell, end covers are fixedly arranged at the two ends of the filter element body, sealing strips are fixedly arranged on the outer sides of the two end covers, a supporting rod is arranged on the filter element body in a penetrating mode, and the supporting rod is fixedly connected with the shell. And annular sealing gaskets are fixedly arranged on the outer sides of the two end covers correspondingly, annular clamping grooves are formed in the two annular sealing gaskets correspondingly, the two sides of the two annular clamping grooves are inclined planes, sleeves are fixedly arranged at the inner bottom of the shell and the inner sides of the sealing covers correspondingly, and the two sides of the outer end of each sleeve are inclined planes correspondingly. The sealing strip and the annular sealing gasket are arranged, the sealing performance between the two ends of the filter element body is ensured through a multi-layer sealing system, unfiltered fluid is prevented from permeating into a downstream system to cause pollution or damage, the maintenance cost is reduced, and the practicability is improved.

The utility model relates to the technical field of catalyst slurry filtering equipment, and discloses a basket filter. The basket filter comprises a barrel, a barrel cover and a filter basket, the barrel is provided with a first flange located at the top, the barrel cover comprises a second flange and a feeding pipe, the feeding pipe is communicated with the interior of the filter basket, the filter basket is provided with a filter basket flange located at the top, and the filter basket flange is located between the first flange and the second flange and matched with the first flange and the second flange to jointly seal the filter basket. The mounting position of the filter basket flange is transferred to the position between the first flange and the second flange, so that the sealing surface between the filter basket and the cylinder body can be uniformly subjected to the action of force from the cylinder cover, and materials are prevented from permeating from the sealing surface between the filter basket and the cylinder body and being discharged through the discharging pipe under the condition that the materials are not filtered; and the feeding pipe is adaptively arranged on the barrel cover to be communicated with the interior of the filter basket, so that the sealing performance of the sealing surface between the filter basket and the barrel body is effectively improved on the basis of not influencing the filtering process.