CN112827235B - Back-flushing type pre-filter - Google Patents
Back-flushing type pre-filter Download PDFInfo
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- CN112827235B CN112827235B CN202110070130.2A CN202110070130A CN112827235B CN 112827235 B CN112827235 B CN 112827235B CN 202110070130 A CN202110070130 A CN 202110070130A CN 112827235 B CN112827235 B CN 112827235B
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- 238000011045 prefiltration Methods 0.000 title claims abstract description 24
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 145
- 238000007790 scraping Methods 0.000 claims abstract description 97
- 238000000926 separation method Methods 0.000 claims abstract description 71
- 238000005406 washing Methods 0.000 claims abstract description 70
- 238000001914 filtration Methods 0.000 claims abstract description 41
- 238000000746 purification Methods 0.000 claims abstract description 18
- 239000010865 sewage Substances 0.000 claims description 138
- 238000007789 sealing Methods 0.000 claims description 87
- 230000007246 mechanism Effects 0.000 claims description 56
- 230000000903 blocking effect Effects 0.000 claims description 47
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 22
- 238000011001 backwashing Methods 0.000 claims description 15
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 9
- 238000009434 installation Methods 0.000 description 9
- 239000008399 tap water Substances 0.000 description 8
- 235000020679 tap water Nutrition 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000008213 purified water Substances 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
- B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
- B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to a back-flushing prefilter. It has solved the not good problem of effect of filter scraping among the prior art. It is including the filter housing who has water inlet and delivery port, the filter housing lower extreme has the drain, be equipped with the filter core barrel in the filter housing, filter core barrel week outside is equipped with the filtration support body, it scrapes the subassembly and scrapes the subassembly with interior to scrape outside having in filtration support body circumference, form former water cavity between filter screen circumference outside and the filter housing circumference inboard, and filter screen circumference inboard is formed with the water purification chamber that is linked together with the delivery port, the water inlet is linked together with former water cavity or water purification chamber, filter the support body and for filter housing circumferential direction and axial positioning, the filter core barrel is connected with and can be linked together water inlet and water purification chamber and make the filter core barrel make the separation and reunion formula of filter core barrel and filtration support body circumferential positioning scrape and wash drive arrangement after going up and down and circumferential direction for filtering support body axial. The invention has the advantages that: good scraping and washing effect, safe and convenient use.
Description
Technical Field
The invention relates to the technical field of filters, in particular to a back-flushing type prefilter.
Background
With the continuous improvement of the living standard of people, people pay more and more attention to the quality of their own life, and the quality of household water is also paid more and more attention to by people, and although tap water is subjected to sterilization, filtration, disinfection and other water purification measures in a tap water plant before being supplied to reach the drinking water standard, because the purification measures of the tap water plant are only basic measures and flow through a tap water supply pipeline with long service time in the tap water supply process, more dirt is always generated in the pipeline because the tap water is not cleaned for a long time, and the tap water supplied to families often contains a lot of bacteria and pollutants, so more and more families begin to use drinking water purifiers or filter the tap water by using filters. The filter screen in the traditional filter needs to be periodically detached, washed and cleaned by a user, so that the filter is very inconvenient to use; in addition, although some filters have back washing and scraping functions, the filter and the inner wall of the filtering shell cannot be cleaned simultaneously, or the scraping stroke is limited, so that dirt adhered to the inner wall of the filter or the filtering shell is difficult to effectively remove, and the scraping effect is poor.
In order to solve the defects of the prior art, people have long searched for and put forward various solutions. For example, the Chinese patent document discloses a motor protector [ CN201821003808.5], which comprises an outer cylinder body, the upper end of the outer cylinder body is connected with an end cover with a water inlet and a water outlet, the lower end of the outer cylinder body is connected with a sewage discharge assembly, a lifting filter element is arranged in the outer barrel, a filter screen is circumferentially covered on the lifting filter element, a raw water cavity which is annular and communicated with the water inlet is formed at the circumferential outer side of the lifting filter element and the circumferential inner side of the outer barrel, a water purification cavity communicated with the water outlet is formed at the circumferential inner side of the lifting filter element, a scraping and washing frame body which is positioned in the raw water cavity is sleeved at the circumferential outer side of the lifting filter element, the scraping and washing frame body is connected with a rotation driving structure, and a lifting driving structure is arranged between the scraping and washing frame body and the lifting filter element, a back washing channel is arranged between the upper end of the lifting filter element and the end cover, one end of the back washing channel is communicated with the water inlet, the other end of the back washing channel is communicated with the water purifying cavity, and a back washing control structure is arranged at the upper end of the lifting filter element.
Above-mentioned scheme has solved the inconvenient problem of filter manual cleaning among the prior art to a certain extent, but this scheme still has a lot of not enoughly, for example: the filter and the inner wall of the filtering shell cannot be cleaned simultaneously, or the scraping and washing stroke is limited, so that dirt adhered to the inner wall of the filter or the inner wall of the filtering shell is difficult to effectively remove, and the cleaning effect is poor.
Disclosure of Invention
The invention aims to solve the problems and provides a backwashing prefilter which is reasonable in design and good in scraping effect.
In order to achieve the purpose, the invention adopts the following technical scheme: the back-flushing type pre-filter comprises a filter shell with a water inlet and a water outlet, wherein the lower end of the filter shell is provided with a sewage discharge outlet, a filter element cylinder body with a filter screen in the circumferential direction is arranged in the filter shell, a filter frame body is sleeved outside the filter element cylinder body in the circumferential direction, an outer scraping and washing component contacted with the inner wall of the filter shell is arranged at the outer side of the periphery of the filter frame body, an inner scraping and washing component contacted with the filter screen is arranged at the inner side of the periphery of the filter frame body, and form former water cavity between filter screen circumference outside and the filter housing circumference inboard, and filter screen circumference inboard is formed with the water purification chamber that is linked together with the delivery port, and the water inlet is linked together with former water cavity or water purification chamber, and filter frame body is relative to filter housing circumferential direction and axial positioning, and the filter core barrel is connected with and can be linked together water inlet and water purification chamber and make the filter core barrel make the separation and reunion formula scraping and washing drive arrangement of filter core barrel and filter frame body circumferential positioning after relative filter frame body axial lift and circumferential rotation. Drive the filter core barrel through separation and reunion formula scraping drive arrangement and drive axial displacement and circumferential direction in filtering the support body, utilize the interior scraping subassembly that sets up on filtering the support body to effectively scrape to wash filter core barrel circumference outer wall, then drive when filter housing and filter core barrel bottom circumferential direction positioning mechanism circumferential direction location and filter the support body synchronous revolution and utilize the outer scraping subassembly that sets up on filtering the support body to carry out unlimited rotation to filter housing inner wall and scrape and wash, can realize scraping filter core barrel and filter shell dual, and not receive the stroke restriction to carry out unlimited rotation and scrape and wash, wherein, when filter core barrel and filter support body bottom contact and circumferential direction location, rivers pass through the water inlet and get into the water purification chamber, outwards carry out back flush process by the filter screen inboard, scrape and wash effectually.
In foretell back flush formula prefilter, filter housing is including filtering the cup, filters the cup upper end and is equipped with the connection pedestal, and water inlet and delivery port setting are on connecting the pedestal, and connect the pedestal upper end and be equipped with the quick detach pedestal, and filter the cup, connect the pedestal and the quick detach link to each other between the pedestal.
In the backwash type pre-filter, the clutch type scraping and washing driving device comprises a scraping and washing driving mechanism which is arranged between the filter shell and the filter element cylinder body, can drive the filter element cylinder body to axially move and circumferentially rotate relative to the filter frame body and can communicate the water inlet with the circumferential inner side of the filter screen, and a clutch type circumferential positioning mechanism which can circumferentially position the filter element cylinder body and the filter frame body after the filter element cylinder body axially moves downwards relative to the filter frame body is arranged between the filter element cylinder body and the filter frame body.
In the back-flushing type pre-filter, the scraping and washing driving mechanism comprises a driving sleeve body arranged in a quick-release seat body, a lifting rotary seat body detachably connected with the upper end of the filter element cylinder body penetrates through the driving sleeve body, a scraping and washing driving assembly capable of enabling the lifting rotary seat body to axially move relative to the driving sleeve body and circumferentially rotate is arranged between the driving sleeve body and the lifting rotary seat body, and a back-flushing flow guide hole capable of communicating a water inlet with a water purification cavity is formed in the circumferential outer side of the lower end of the lifting rotary seat body; the scraping and washing driving assembly comprises a driving rod body which is circumferentially rotated and axially positioned and penetrates through the upper end of the driving sleeve body, the upper end of the driving rod body is connected with a rotating knob which is rotatably arranged at the upper end of the quick-release base body, the lower end of the driving rod body is circumferentially positioned and axially slidably connected with the upper end of the lifting and rotating base body, the upper end of the lifting and rotating base body is provided with an external thread part with external threads on the circumferential outer side, and the external threads on the external thread part are meshed with internal threads arranged on the circumferential inner side of the driving sleeve body; the circumferential outer side of the upper end of the driving rod body and the circumferential inner side of the driving sleeve body are sealed with each other, the lower end of the driving rod body is provided with a lifting driving part with a non-circular cross section, the circumferential inner side of the outer thread part is provided with a lifting driving hole matched with the lifting driving part, and the lifting driving part and the lifting driving hole axially slide and are circumferentially positioned. The scraping and washing driving assembly drives the lifting and rotating seat body to axially move along the driving sleeve body, so that the filter element barrel arranged at the lower end of the lifting and rotating seat body synchronously rotates and lifts, and the linkage effect is good; and the driving rod body is driven to rotate in the driving sleeve body by rotating the knob, the inner wall of the driving sleeve body is in threaded connection with the upper end of the lifting rotating base body, and the lower end of the driving rod body is inserted into the threaded part at the upper end of the lifting rotating base body, so that the lifting rotating base body can realize threaded lifting in the driving sleeve body, and the use is convenient.
In the back-flushing type pre-filter, the clutch type circumferential positioning mechanism comprises a frame body base arranged on the circumferential inner side of the lower end of the filter frame body, the lower end of the filter element cylinder body is provided with a filter element base penetrating through the circumferential inner side of the frame body base, and a clutch type circumferential positioning assembly capable of positioning the frame body base and the filter element base in the circumferential direction when the frame body base and the filter element base are close to each other is arranged between the frame body base and the filter element base; the separation and reunion type circumferential positioning assembly comprises at least one first separation and reunion limiting bulge arranged on the circumferential outer side of the bottom of the frame body base, and the lower end of the filter element base is provided with at least one second separation and reunion limiting bulge which is arranged in a staggered manner with the first separation and reunion limiting bulge and is mutually abutted; an elastic jacking clutch mechanism which can enable the external thread part to keep moving trend towards the direction of the driving sleeve body when the external thread part is separated from the internal thread of the driving sleeve body when the filter element cylinder and the filter frame body are positioned in the circumferential direction and the external thread part is reversed so as to be meshed with the internal thread again is arranged between the lower end of the filter element cylinder and the filter shell body; the elastic jacking clutch mechanism comprises a base hole arranged in the center of the frame body base, the lower end of the filter element base is provided with a base cylinder inserted in the base hole, a jacking clutch spring is arranged in the base cylinder, one end of the jacking clutch spring acts on the filter element base, and the other end of the jacking clutch spring acts on the bottom of the filter shell; the filter frame body is circumferentially provided with a plurality of vertically arranged scraping and washing mounting grooves, scraping and washing mounting parts are mounted in the scraping and washing mounting grooves, one side of each scraping and washing mounting part is provided with an outer scraping and washing strip which extends to the circumferential outer side of the filter frame body and is in contact with the inner wall of the filter cup body so as to form an outer scraping and washing assembly, and the other side of each scraping and washing mounting part is provided with an inner scraping and washing strip which extends to the circumferential inner side of the filter frame body and is in contact with the outer wall of the filter screen so as to form an inner scraping and washing assembly; the lower end of the frame base is provided with a plurality of columnar bodies which are abutted against the bottom of the filtering cup body of the filter shell, a sewage discharge bottom cavity communicated with a sewage discharge port is formed between the frame base and the filtering cup body, and a plurality of sewage discharge guide holes communicated with the sewage discharge bottom cavity are circumferentially arranged on the frame base. The filter frame body is driven to synchronously rotate by the staggered connection of the first clutch limiting bulge and the second clutch limiting bulge, so that the structure is simple, and the use is convenient; after the scraping is finished, the filter element cylinder can be quickly reset through the elastic jacking clutch mechanism; the inner scraping and washing strip and the outer scraping and washing strip can be used for scraping and washing the filter element cylinder and the inner wall of the filter shell, the scraping and washing effect is good, and the sewage after backwashing can be rapidly discharged through the blowdown diversion holes and the blowdown bottom cavity.
In the back-flushing pre-filter, the connecting seat body is in a cylindrical shape with an upper opening and a lower opening, one side of the connecting seat body is provided with a water inlet pipe joint, the other side of the connecting seat body is provided with a water outlet pipe joint, a water inlet is formed on the water inlet pipe joint, a water outlet is formed on the water outlet pipe joint, the separation seat body is provided with a water cavity at the circumferential inner side of the connecting seat body and can separate the water cavity from the circumferential inner wall of the connecting seat body, the separation seat body is cylindrical, the separation seat body is respectively provided with a cylinder inlet and a cylinder outlet for communicating the water inlet and the water outlet with the water cavity, the cylinder inlet and the cylinder outlet of the separation seat body are respectively connected with a separation tube body penetrating through the circumferential inner sides of the water inlet and the water outlet, the connecting seat body is provided with a seat body positioning assembly capable of detachably positioning the separation seat body in the connecting seat body, and the upper end of the separation seat body and/or the upper end of the connecting seat body are connected with a quick-release seat body capable of sealing an opening at the upper end of the separation seat body through a quick-release connecting assembly; the seat body positioning assembly comprises a pressing ring which is arranged on the circumferential inner side of an opening at the upper end of the connecting seat body and is positioned at the upper end of the separation seat body or the circumferential outer side of the separation seat body, the pressing ring is connected with the connecting seat body in a detachable mode, the pressing ring is annular, the circumferential outer side of the pressing ring is provided with an annular external thread, an annular internal thread which is meshed with the annular external thread is arranged on the circumferential inner side of the opening at the upper end of the connecting seat body, and the pressing ring is in threaded connection with the connecting seat body; the clamping ring is located between the circumference outer side of the upper end of the separation seat body and the circumference inner side of the opening of the upper end of the connection seat body, the circumference outer side of the separation seat body is provided with a separation seat limiting step which is abutted against the clamping ring, the circumference outer side of the separation seat limiting step is provided with a separation seat sealing ring groove, and the separation seat sealing ring groove is provided with a separation seat sealing ring body which is abutted against the circumference inner side of the connection seat body. The separation base body is arranged on the inner wall of the connection base body, the base body positioning assembly and the quick-release base body ensure that the separation base body and the connection base body are stably arranged, and effective separation is realized on the internal water cavity and the connection base body; the pressing ring is arranged between the separation seat body and the connection seat body, so that the axial position of the separation seat body is effectively limited, and meanwhile, the sealing property between the separation seat body and the connection seat body is improved; the spacing step of the separation seat, the sealing ring groove of the separation seat and the sealing ring body of the separation seat realize multiple sealing of the pressing ring and the connecting seat body, and the separation seat body and the upper end of the connecting seat body are pressed and sealed.
In the back-flushing pre-filter, the quick-release seat body comprises a seat body cylindrical part which is cylindrical and penetrates through the circumferential inner side of the separation seat body, the quick-release connecting assembly is arranged between the seat body cylindrical part and the separation seat body, a first sealing structure is arranged between the seat body cylindrical part and the separation seat body, the upper ends of the separation seat body and the pressing ring are flush and exceed the upper end opening of the connection seat body, and the upper end of the seat body cylindrical part is provided with a seat body end cover part which is abutted against the upper end of the separation seat body and/or the pressing ring; the quick-release connecting assembly comprises a plurality of first quick-release convex ribs arranged on the circumferential outer side of the cylindrical part of the base body, the circumferential inner side of the blocking base body is provided with a plurality of second quick-release convex ribs which are in one-to-one correspondence with the first quick-release convex ribs respectively, the first quick-release convex ribs and the second quick-release convex ribs are both provided with axial limiting parts and circumferential limiting parts, the axial limiting parts of the first quick-release convex ribs and the axial limiting parts of the second quick-release convex ribs are arranged in a vertically abutted mode, and one ends of the axial limiting parts of the first quick-release convex ribs or the second quick-release convex ribs are abutted against the circumferential limiting parts of the second quick-release convex ribs or the first quick-release convex ribs; the first sealing structure comprises a plurality of first sealing ring positioning grooves which are arranged at the circumferential outer side of the cylindrical part of the seat body or the circumferential inner side of the blocking seat body, and first sealing ring bodies which are abutted against the circumferential inner side of the blocking seat body or the circumferential outer side of the cylindrical part of the seat body are arranged in the first sealing ring positioning grooves; the lower end of the connecting seat body is axially limited relative to the upper end of the filtering cup body, and a second sealing structure is arranged between the connecting seat body and the filtering cup body; the upper end of the filtering cup body is arranged in the circumferential inner side of the connecting seat body in a penetrating mode, the circumferential inner side of the lower end of the connecting seat body is provided with the connecting seat limiting step, the circumferential outer side of the upper end of the filtering cup body is provided with the cup body limiting step with the lower end abutting against the connecting seat limiting step, the upper end of the cup body limiting step abuts against the separating seat body, the second sealing structure comprises a plurality of second sealing ring positioning grooves formed in the connecting seat limiting step or the cup body limiting step, and second sealing ring bodies abutting against the circumferential inner side of the connecting seat body or the circumferential outer side of the filtering cup body are arranged in the second sealing ring positioning grooves. The quick-release connecting assembly quickly clamps and fixes the separation base body and the cylindrical part of the base body, and is matched with the first sealing structure to realize the sealing connection of the separation base body and the quick-release base body; the first sealing ring positioning groove is matched with the first sealing ring body, the sealing performance of the separation base body and the quick-release base body is better, the filtering cup body is arranged at the lower end of the connecting base body in an inserting mode, and the separation base body fixedly presses the filtering cup body and the inner side of the connecting base body; the second sealing structure ensures the connection sealing performance of the filtering cup body and the connecting seat body, and the connecting seat limiting step and the cup body limiting step prevent the connecting seat body from separating and falling off from the filtering cup body.
In the back-flushing type pre-filter, the lower end of the filter element cylinder body is provided with an explosion-proof type pollution discharge control mechanism which can open or close the pollution discharge port when the filter element cylinder body is lifted axially and has a pressure relief function when the pollution discharge valve is kept closed.
In the back-flushing type pre-filter, the explosion-proof pollution discharge control mechanism comprises a valve rod hole arranged on a filter element base at the lower end of a filter element cylinder body, a movable valve rod is axially and movably arranged in the valve rod hole in a penetrating mode, the movable valve rod is axially and unidirectionally limited relative to the filter element base respectively, a valve seat cylindrical part communicated with the valve rod hole is arranged at the lower end of the filter element base, the inner diameter of the valve seat cylindrical part is larger than the diameter of the valve rod hole, a valve rod limiting step is formed between the circumferential inner side of the valve seat cylindrical part and the lower end face of the filter element base, two valve rod limiting parts are arranged on the movable valve rod, one of the valve rod limiting parts abuts against the valve rod limiting step, and the other valve rod limiting part abuts against the lower end face of the valve seat cylindrical part; the lower end of the movable valve rod penetrates through the sewage draining port, the lower end of the movable valve rod is provided with a sewage draining plug capable of sealing the lower end of the sewage draining port, and an elastic jacking explosion-proof mechanism capable of enabling the movable valve rod to keep the upward movement trend so as to enable the sewage draining plug to keep a state of being sealed in the sewage draining port is arranged between the upper end of the movable valve rod and the filter element base. The movable valve rod is arranged on the valve rod seat at the lower end of the filter shell, the elastic jacking explosion-proof mechanism is arranged at the upper end of the movable valve rod, the lower end of the movable valve rod is provided with a sewage discharge plug for plugging a sewage discharge outlet, when the water pressure of the filter shell reaches an extreme value, the acting force of the elastic jacking explosion-proof mechanism is overcome, the movable valve rod is enabled to generate downward displacement to drive the sewage discharge plug to open the sewage discharge outlet, the purpose of rapid and real-time pressure relief is achieved, after pressure relief is completed, the movable valve rod is enabled to reset upwards due to the acting force of the elastic jacking explosion-proof mechanism, the sewage discharge outlet is enabled to be closed again due to the sewage discharge plug, and the use is safe.
In the back-flushing type pre-filter, the elastic jacking explosion-proof mechanism comprises an explosion-proof spring sleeved on the circumferential outer side of the upper end of the movable valve rod, one end of the explosion-proof spring is abutted against a spring limiting part detachably arranged on the upper end of the movable valve rod, and the other end of the explosion-proof spring is abutted against the filter element base; the diameter of the spring limiting part is larger than that of the movable valve rod, the spring limiting part is connected with the movable valve rod in a threaded mode, and the upper end face of the spring limiting part and the end face of the end, connected with the movable valve rod, of the sewage discharging plug are formed on a stress surface respectively; the lower end of the sewage draining port is connected with a sewage draining joint, a sewage draining channel communicated with the sewage draining port is arranged in the sewage draining joint, the diameter of the sewage draining channel is larger than that of the sewage draining port, a sewage draining plug is integrally formed at the lower end of the movable valve rod, and the sewage draining plug extends into the sewage draining channel; the diameter of the sewage discharge plug is equal to that of the sewage discharge outlet, a sewage discharge sealing ring groove is formed in the circumferential outer side of the sewage discharge plug, and a sewage discharge sealing ring body abutting against the lower end of the sewage discharge outlet is arranged in the sewage discharge sealing ring groove; or the diameter of the sewage discharge plug is larger than that of the sewage discharge outlet, a plug limiting step is formed between the sewage discharge outlet and the sewage discharge channel, and the upper end of the sewage discharge plug abuts against the sewage discharge limiting step; annular pollution discharge inclined planes are respectively arranged on the circumferential inner sides of the upper end and the lower end of the pollution discharge port, annular guide inclined planes are respectively arranged on the circumferential inner sides of the upper end and the lower end of the pollution discharge plug, and the annular pollution discharge inclined planes at the lower end of the pollution discharge port are matched with the annular guide inclined planes at the upper end of the pollution discharge plug. The movable valve rod keeps the upward movement trend through the explosion-proof spring, the movable valve rod is convenient to reset quickly after pressure relief, and when the water pressure applied to the movable valve rod is greater than the acting force of the explosion-proof spring, the movable valve rod moves downwards and drives the sewage discharge plug to move synchronously to open the sewage discharge outlet, so that quick pressure relief is facilitated, water flow in the filter shell is discharged quickly, and the water discharge amount is increased; the pollution discharge plug can seal the pollution discharge outlet more tightly.
Compared with the prior art, the invention has the advantages that: reasonable design and good linkage, the filter element cylinder is driven to axially move and circumferentially rotate in the filter frame body by the scraping and washing driving mechanism, the circumferential outer wall of the filter element cylinder is effectively scraped and washed by the inner scraping and washing component arranged on the filter frame body, when the bottom of the filter shell body and the filter element cylinder body are circumferentially positioned by the clutch type circumferential positioning mechanism, the filter frame body is driven to synchronously rotate, the inner wall of the filter shell body is scraped and washed by the outer scraping and washing component arranged on the filter frame body in an infinite rotation manner, the double scraping and washing of the filter element cylinder body and the filter shell can be realized, the infinite rotation scraping and washing can not be carried out by the limitation of the stroke, the back washing is carried out at the same time, after the scraping and washing is finished, the filter element cylinder body can be quickly reset by the elastic jacking and pressing clutch mechanism,
the movable valve rod is arranged on the valve rod seat at the lower end of the filter shell, the elastic jacking explosion-proof mechanism is arranged at the upper end of the movable valve rod, the lower end of the movable valve rod is provided with a sewage discharge plug for plugging a sewage discharge outlet, when the water pressure of the filter shell reaches an extreme value, the acting force of an explosion-proof spring is overcome, the movable valve rod moves downwards to drive the sewage discharge plug to open the sewage discharge outlet, the aim of rapid and real-time pressure relief is achieved, after pressure relief is completed, the movable valve rod is reset upwards due to the acting force of the elastic jacking explosion-proof mechanism, the sewage discharge outlet is closed again through the sewage discharge plug, and the safety of daily use is improved.
Secondly, the separation base body is fixedly installed with the quick-release base body and the connection base body through the base body positioning assembly and the quick-release connection assembly, and the connection base body is separated from the internal water cavity, so that the heavy metal ions are prevented from polluting the water body; the quick-release connecting assembly assembles the quick-release base body to the connecting base body, so that the components such as an internal filter element and the like can be conveniently and quickly disassembled and cleaned; the sealing performance of each part connection is guaranteed to a plurality of seal structures, effectively prevents the water leakage.
Drawings
FIG. 1 is a cross-sectional view of the overall construction of the present invention;
FIG. 2 is an exploded view of a portion of the structure of the present invention;
FIG. 3 is a partial schematic view of the present invention;
FIG. 4 is a schematic view of the structure of the filter frame of the present invention;
FIG. 5 is a schematic view of the bottom structure of the filter frame body according to the present invention;
fig. 6 is a schematic view of the cartridge body structure of the present invention.
FIG. 7 is a partial sectional view of the construction of the present invention;
FIG. 8 is an assembled expanded view of the present invention;
FIG. 9 is a schematic structural view of the separation seat and the quick release seat of the present invention;
FIG. 10 is a schematic view of the explosion-proof pollution discharge control mechanism according to the present invention;
fig. 11 is a sectional view showing an assembled position of the explosion-proof pollution discharge control mechanism in the present invention.
In the figure, a filter shell 1, a water inlet 11, a water outlet 12, a sewage discharge outlet 13, a sewage discharge joint 131, a sewage discharge channel 132, an annular sewage discharge inclined plane 133, an annular guide inclined plane 134, a filter element cylinder 14, a filter frame body 15, an outer scraping assembly 151, an inner scraping assembly 152, a scraping installation groove 153 scraping installation part 154, an outer scraping strip 155, an inner scraping strip 156, a raw water cavity 16, a purified water cavity 17, a filter cup body 18, a cup body limiting step 181, a connecting seat body 19, a water inlet pipe joint 191, a water outlet pipe joint 192, a water cavity 193, a blocking seat body 194, a cylinder inlet and outlet 195, a blocking pipe body 196, a seat body positioning assembly 197, a pressing ring 1971, an annular external thread 1972, an annular internal thread 1973, a blocking seat limiting step 1974, a blocking seat sealing ring groove 1975, a blocking seat sealing ring body 1976, a quick-release connecting assembly 198, a first quick-release convex rib 1981, a second quick-release convex rib 1982, an axial direction limiting part 1983, a circumferential direction limiting part 1984, a circular direction limiting part, A connecting seat limit step 199, a clutch type scraping and washing driving device 2, a quick-release seat body 3, a seat body cylindrical part 31, a first sealing structure 32, a first sealing ring positioning groove 321, a first sealing ring body 322, a second sealing structure 33, a second sealing ring positioning groove 331, a second sealing ring body 332, a seat body end cover part 34, a scraping and washing driving mechanism 4, a driving sleeve body 41, a lifting and rotating seat body 42, an external thread part 421, a lifting and washing driving hole 422, a scraping and washing driving component 43, a driving rod body 431, a rotating knob 432, a back washing diversion hole 44, an internal thread 45, a lifting and driving part 46, a clutch type circumferential positioning mechanism 5, a frame body base 51, a column body 511, a sewage discharge bottom cavity 512, a sewage discharge diversion hole 513, a filter element base 52, a clutch type circumferential positioning component 6, a first clutch limit bulge 61, a second clutch limit bulge 62, an elastic jacking and clutch mechanism 7, a base hole 71, a base cylinder body 72, The anti-explosion valve comprises a jacking clutch spring 73, an anti-explosion pollution discharge control mechanism 8, a valve rod hole 81, a movable valve rod 82, a valve seat cylindrical part 83, a valve rod limiting step 84, a valve rod limiting part 85, a pollution discharge plug 86, a pollution discharge sealing ring groove 861, a pollution discharge sealing ring body 862, a plug limiting step 87, an elastic jacking anti-explosion mechanism 9, an anti-explosion spring 91, a spring limiting part 92 and a stress surface 93.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-6, the back-flushing pre-filter includes a filter housing 1 having a water inlet 11 and a water outlet 12, a sewage outlet 13 is provided at the lower end of the filter housing 1, a filter cartridge 14 having a filter screen circumferentially is provided in the filter housing 1, a filter cartridge body 15 is sleeved on the outer circumferential side of the filter cartridge body 14, an outer scraping assembly 151 contacting with the inner wall of the filter housing 1 is provided on the outer circumferential side of the filter cartridge body 15, an inner scraping assembly 152 contacting with the filter screen is provided on the inner circumferential side of the filter cartridge body 15, a raw water chamber 16 is formed between the outer circumferential side of the filter screen and the inner circumferential side of the filter housing 1, a purified water chamber 17 communicating with the water outlet 12 is formed on the inner circumferential side of the filter screen, the water inlet 11 is communicated with the raw water chamber 16 or the purified water chamber 17, the filter cartridge body 15 rotates circumferentially and is axially positioned relative to the filter housing 1, and the filter cartridge body 14 is connected to enable the water inlet 11 to communicate with the purified water chamber 17 and the filter cartridge body 14 to axially lift and enable the filter cartridge body 15 to axially lift and to move up and down relative to the filter housing 15 After circumferential rotation, the clutch type scraping and driving device 2 can circumferentially position the filter element cylinder 14 and the filter frame body 15. Drive filter core barrel 14 axial displacement and circumferential direction in filtering frame body 15 through separation and reunion formula scraping drive arrangement 2, scrape through setting up and wash subassembly 152 in filtering frame body 15 circumference inboard and filter screen contact and scrape and wash filter core barrel 14 outer wall, then drive when filter core barrel 14 displacement to filtering frame body 15 bottom and filter frame body 15 synchronous rotation, and utilize the setting to scrape and wash subassembly 151 outside filtering frame body 15 circumference outside and filter frame body 1 inner wall contact and scrape and wash filter frame body 1 inner wall, when filter core barrel 14 and filtering frame body 15 circumference location, water inlet 11 and filter screen circumference inboard are linked together, rivers flow into water purification chamber 17 from water inlet 11, outwards carry out the back flush process by the filter screen inboard, effectively clear away dirt and adhesion thing, scraping and washing effect has been improved.
Wherein, filter housing 1 is including filtering cup 18, filters the cup 18 upper end and is equipped with connection pedestal 19, and water inlet 11 and delivery port 12 set up on connecting pedestal 19, and connects the pedestal 19 upper end and be equipped with quick detach pedestal 3, and filter the cup 18, connect between pedestal 19 and the quick detach pedestal 3 quick detach and link to each other.
Visibly, the clutch type scraping and washing driving device 2 comprises a scraping and washing driving mechanism 4 which is arranged between the filter shell 1 and the filter element cylinder 14, can drive the filter element cylinder 14 to axially move and circumferentially rotate relative to the filter frame body 15 and can communicate the water inlet 11 with the circumferential inner side of the filter screen, and a clutch type circumferential positioning mechanism 5 which can circumferentially position the filter element cylinder 14 and the filter frame body 15 after the filter element cylinder 14 axially moves downwards relative to the filter frame body 15 is arranged between the filter element cylinder 14 and the filter frame body 15.
In detail, the scraping and washing driving mechanism 4 comprises a driving sleeve body 41 arranged in the quick-release seat body 3, a lifting and rotating seat body 42 detachably connected with the upper end of the filter element cylinder 14 penetrates through the driving sleeve body 41, a scraping and washing driving assembly 43 capable of enabling the lifting and rotating seat body 42 to axially move and circumferentially rotate relative to the driving sleeve body 41 is arranged between the driving sleeve body 41 and the lifting and rotating seat body 42, and a back washing flow guide hole 44 capable of communicating the water inlet 11 with the purified water cavity 17 is formed in the circumferential outer side of the lower end of the lifting and rotating seat body 42; the scraping and washing driving assembly 43 comprises a driving rod body 431 which rotates in the circumferential direction and is axially positioned and penetrated through the upper end of the driving sleeve body 41, the upper end of the driving rod body 431 is connected with a rotating knob 432 which is rotatably arranged at the upper end of the quick-release base body 3, the lower end of the driving rod body 431 is circumferentially positioned and axially slidably connected with the upper end of the lifting and rotating base body 42, the upper end of the lifting and rotating base body 42 is provided with an external thread part 421 of which the outer side in the circumferential direction is provided with external threads, and the external threads on the external thread part 421 are meshed with the internal threads 45 arranged at the inner side in the circumferential direction of the driving sleeve body 41; the circumferential outer side of the upper end of the driving rod body 431 and the circumferential inner side of the driving sleeve body 41 are sealed with each other, the lower end of the driving rod body 431 is provided with a lifting driving part 46 with a non-circular cross section, the circumferential inner side of the external thread part 421 is provided with a lifting driving hole 422 matched with the lifting driving part 46, and the lifting driving part 46 and the lifting driving hole 422 axially slide and are circumferentially positioned. When the upper end of the lifting rotary seat body 42 is separated from the driving sleeve body 41 and the bottoms of the filter element cylinder body 14 and the filter frame body 15 are circumferentially positioned, water flow is forced to enter the water purification cavity 17 through the backwashing water guide holes 44 and is backwashed from the inner side of the filter screen to the outside; when the rotating knob 432 is rotated, the driving rod 431 rotates in the inner circumference of the driving sleeve 41, and the lifting rotating base 42 rotates and lifts in the axial direction along the inner circumference of the driving sleeve 41.
Further, the clutch type circumferential positioning mechanism 5 comprises a frame body base 51 arranged on the circumferential inner side of the lower end of the filter frame body 15, a filter element base 52 penetrating the circumferential inner side of the frame body base 51 is arranged at the lower end of the filter element cylinder 14, and a clutch type circumferential positioning assembly 6 capable of positioning the frame body base 51 and the filter element base 52 in the circumferential direction when the frame body base 51 and the filter element base are close to each other is arranged between the frame body base 51 and the filter element base 52; the clutch type circumferential positioning assembly 6 comprises at least one first clutch limiting bulge 61 arranged on the circumferential outer side of the bottom of the frame body base 51, and the lower end of the filter element base 52 is provided with at least one second clutch limiting bulge 62 which is arranged in a staggered manner with the first clutch limiting bulge 61 and is abutted against each other; an elastic pressing clutch mechanism 7 which can enable the external thread part 421 to keep moving trend towards the driving sleeve body 41 when the external thread part 421 is positioned circumferentially on the filter element cylinder 14 and the filter frame body 15 and the external thread of the external thread part 421 is separated from the internal thread 45 of the driving sleeve body 41 so as to enable the external thread part 421 to be meshed with the internal thread 45 again when the external thread part is reversely rotated is arranged between the lower end of the filter element cylinder 14 and the filter shell 1; the elastic jacking clutch mechanism 7 comprises a base hole 71 arranged in the center of the frame body base 51, a base cylinder 72 inserted in the base hole 71 is arranged at the lower end of the filter element base 52, a jacking clutch spring 73 is arranged in the base cylinder 72, one end of the jacking clutch spring 73 acts on the filter element base 52, and the other end acts on the bottom of the filter shell 1; the circumferential direction of the filter frame body 15 is provided with a plurality of vertically arranged scraping and washing installation grooves 153, a scraping and washing 4 installation part 154 is installed in the scraping and washing installation grooves 153, one side of the scraping and washing installation part 154 is provided with an outer scraping and washing strip 155 which extends to the circumferential outer side of the filter frame body 15 and is contacted with the inner wall of the filter cup body 18 so as to form an outer scraping and washing assembly 151, and the other side is provided with an inner scraping and washing strip 156 which extends to the circumferential inner side of the filter frame body 15 and is contacted with the outer wall of a filter screen so as to form an inner scraping and washing assembly 152; the lower end of the frame base 51 is provided with a plurality of columnar bodies 511 which are abutted against the bottom of the filtering cup body 18 of the filter shell 1, a sewage discharge bottom cavity 512 communicated with the sewage discharge port 13 is formed between the frame base 51 and the filtering cup body 18, and a plurality of sewage discharge guide holes 513 communicated with the sewage discharge bottom cavity 512 are arranged in the circumferential direction of the frame base 51. The first clutch limiting bulge 61 and the second clutch limiting bulge 62 are in staggered clamping connection with each other, and when the filter element cylinder 14 rotates, the filter frame body 15 is driven to rotate synchronously; the elastic pressing clutch mechanism 7 not only can quickly reset the external thread part 421 separated from the inside of the driving sleeve 41 after the scraping and washing is completed, but also can enable the filter element cylinder 14 to drive the filter frame body 15 to perform infinite circumferential rotation.
As shown in fig. 7-9, the connection seat body 19 is a cylindrical body with an upper opening and a lower opening, one side of the connection seat body 19 is provided with a water inlet pipe joint 191, the other side of the connection seat body is provided with a water outlet pipe joint 192, the water inlet 11 is formed on the water inlet pipe joint 191, the water outlet 12 is formed on the water outlet pipe joint 192, the circumferential inner side of the connection seat body 19 is provided with a separation seat body 194 with a water cavity 193 and capable of separating the water cavity 193 from the circumferential inner wall of the connection seat body 19, the separation seat body 194 is cylindrical, the separation seat body 194 is respectively provided with a cylinder inlet/outlet 195 for communicating the water inlet 11 with the water outlet 12 with the water cavity 193, the cylinder inlet/outlet 195 of the separation seat body 194 is respectively connected with a separation tube body 196 penetrating through the circumferential inner sides of the water inlet 11 and the water outlet 12, the connection seat body 19 is provided with a seat body positioning assembly 197 capable of detachably positioning the separation seat body 194 in the connection seat body 19, the upper end of the separation seat body 194 and/or the upper end of the connection seat body 19 is capable of closing the upper end of the separation seat body 194 through a quick release 198 The quick-release base bodies 3 are connected; the seat body positioning assembly 197 comprises a pressing ring 1971 which is arranged on the circumferential inner side of the opening at the upper end of the connecting seat body 19 and is positioned at the upper end of the obstructing seat body 194 or the circumferential outer side of the obstructing seat body 194, the pressing ring 1971 is detachably connected with the connecting seat body 19, the pressing ring 1971 is annular, the circumferential outer side of the pressing ring 1971 is provided with an annular external thread 1972, the circumferential inner side of the opening at the upper end of the connecting seat body 19 is engaged with an annular internal thread 1973 of the annular external thread 1972, and the pressing ring 1971 is in threaded connection with the connecting seat body 19; the pressing ring 1971 is located between the circumferential outer side of the upper end of the blocking seat body 194 and the circumferential inner side of an upper end opening of the connecting seat body 19, the circumferential outer side of the blocking seat body 194 is provided with a blocking seat limiting step 1974 abutted against the pressing ring 1971, the circumferential outer side of the blocking seat limiting step 1974 is provided with a blocking seat sealing ring groove 1975, and the blocking seat sealing ring groove 1975 is provided with a blocking seat sealing ring body 1976 abutted against the circumferential inner side of the connecting seat body 19. During assembly, the separation base body 194 is assembled into the connection base body 19 to be attached to the inner side, the quick-release base body 3 is assembled into the opening at the upper end of the separation base body 194 through the quick-release connecting assembly 198, the separation base body 194 is installed between the quick-release base body 3 and the connection base body 19 in a sealing manner under the action of the quick-release base body 3 and the base body positioning assembly 197, and the separation base body 194 extends downwards in the connection base body 19 until contacting and pressing with the upper end of the filter cup body 18. The connecting seat body 19 is generally made of metal materials such as copper, heavy metal ions in the connecting seat body are diffused into water after long-time use to pollute the water, and the water cavity 17 on the inner side of the separating seat body 194 is separated from the inner wall of the separating seat body 194 by the separating seat body 194, so that the heavy metals such as copper, lead, cadmium and the like are prevented from contacting the water.
The quick release seat body 3 comprises a seat body cylindrical part 31 which is cylindrical and penetrates through the circumferential inner side of the separation seat body 194, the quick release connecting assembly 198 is arranged between the seat body cylindrical part 31 and the separation seat body 194, a first sealing structure 32 is arranged between the seat body cylindrical part 31 and the separation seat body 194, the upper ends of the separation seat body 194 and the pressing ring 1971 are flush and exceed an upper end opening of the connection seat body 19, and the upper end of the seat body cylindrical part 31 is provided with a seat body end cover part 34 which abuts against the upper end of the separation seat body 194 and/or the upper end of the pressing ring 1971; the quick-release connecting assembly 198 comprises a plurality of first quick-release ribs 1981 arranged on the circumferential outer side of the cylindrical part 31 of the seat body, the circumferential inner side of the blocking seat body 194 is provided with a plurality of second quick-release ribs 1982 which are respectively in one-to-one correspondence with the first quick-release ribs 1981, the first quick-release ribs 1981 and the second quick-release ribs 1982 are respectively provided with an axial limiting part 1983 and a circumferential limiting part 1984, the axial limiting part 1983 of the first quick-release ribs 1981 and the axial limiting part 1983 of the second quick-release ribs 1982 are arranged in an up-and-down abutting mode, and one end of the axial limiting part 1983 of the first quick-release ribs 1981 or the second quick-release ribs 1982 abuts against the second quick-release ribs 1982 or the circumferential limiting part 1984 of the first quick-release ribs 1981; the first sealing structure 32 comprises a plurality of first sealing ring positioning grooves 321 arranged on the circumferential outer side of the seat body cylindrical part 31 or the circumferential inner side of the blocking seat body 194, and a first sealing ring body 322 which is abutted against the circumferential inner side of the blocking seat body 194 or the circumferential outer side of the seat body cylindrical part 31 is arranged in each first sealing ring positioning groove 321; the lower end of the connecting seat body 19 is axially limited relative to the upper end of the filtering cup body 18, and a second sealing structure 33 is arranged between the connecting seat body 19 and the filtering cup body 18; the upper end of the filter cup body 18 is arranged on the inner side of the circumferential direction of the connecting seat body 19 in a penetrating manner, the inner side of the circumferential direction of the lower end of the connecting seat body is provided with a connecting seat limiting step 199, the outer side of the circumferential direction of the upper end of the filter cup body 18 is provided with a cup body limiting step 181 with the lower end abutting against the connecting seat limiting step 199, the upper end of the cup body limiting step 181 abuts against the separation seat body 194, the second sealing structure 33 comprises a plurality of second sealing ring positioning grooves 331 arranged on the connecting seat limiting step 199 or the cup body limiting step 181, and second sealing ring bodies 332 abutting against the inner side of the circumferential direction of the connecting seat body 19 or the outer side of the circumferential direction of the filter cup body 18 are arranged in the second sealing ring positioning grooves 331. The seat body cylindrical part 31 and the seat body end cover part 34 are connected into a whole, wherein the quick-release connecting assembly 198 between the seat body cylindrical part 31 and the separation seat body 194 realizes the quick connection between the quick-release seat body 3 and the separation seat body 194 in a pressing and rotating mode, and the pressing ring 1971 is pressed and fixed between the separation seat body 194 and the seat body end cover part 34 by the quick-release connecting assembly 198; the quick-release connecting assembly 198 restrains the axial position and the circumferential rotation angle of the cylindrical part 31 of the seat body and the blocking seat body 194, and the quick-release seat body 3 together with the filter core and other components mounted inside can be taken out by rotating the quick-release seat body 194 in a movable connection manner; the connecting seat limiting step 199 and the cup body limiting step 181 are buckled, the second sealing ring body 332 between the connecting seat limiting step 199 and the cup body limiting step 181 is used for filling and pressing the second sealing ring positioning groove 331, the filtering cup body 18 is required to be firstly pressed into the connecting seat body 19 during installation, and then the assembly of the blocking seat body 194 is completed.
As shown in fig. 10-11, the lower end of the filter element cylinder 14 is provided with an explosion-proof pollution discharge control mechanism 8 which can open or close the pollution discharge outlet 13 when the filter element cylinder 14 is lifted axially and has a pressure relief function when the pollution discharge valve is kept closed.
Specifically, the explosion-proof pollution discharge control mechanism 8 comprises a valve rod hole 81 arranged on the filter element base 52 at the lower end of the filter element cylinder 14, a movable valve rod 82 penetrates through the valve rod hole 81 in an axial and movable mode, the movable valve rod 82 is limited axially and unidirectionally relative to the filter element base 52, a valve seat cylindrical part 83 communicated with the valve rod hole 81 is arranged at the lower end of the filter element base 52, the inner diameter of the valve seat cylindrical part 83 is larger than the diameter of the valve rod hole 81, a valve rod limiting step 84 is formed between the circumferential inner side of the valve seat cylindrical part 83 and the lower end face of the filter element base 52, two valve rod limiting parts 85 are arranged on the movable valve rod 82, one valve rod limiting part 85 abuts against the valve rod limiting step 84, and the other valve rod limiting part 85 abuts against the lower end face of the valve seat cylindrical part 83; the lower end of the movable valve rod 82 penetrates through the sewage outlet 13, the lower end of the movable valve rod 82 is provided with a sewage discharge plug 86 capable of sealing the lower end of the sewage outlet 13, and an elastic jacking explosion-proof mechanism 9 capable of enabling the movable valve rod 82 to keep an upward movement trend so as to enable the sewage discharge plug 86 to keep a state of being sealed in the sewage outlet 13 is arranged between the upper end of the movable valve rod 82 and the filter element base 52. Through set up movable valve rod 82 at filter housing 1 lower extreme, utilize the spacing step 84 of valve rod to carry out one-way spacing to movable valve rod 82, make the blowdown end cap 86 that is located movable valve rod 82 lower extreme just form to seal to drain 13, when water pressure exceeded the produced pressure of 10 kilograms of rivers, water pressure overcome the effort of elasticity roof pressure explosion-proof mechanism 9, thereby make movable valve rod 82 remove down and make blowdown end cap 86 break away from drain 13 to release rivers release the release fast through drain 13.
In detail, the elastic jacking explosion-proof mechanism 9 comprises an explosion-proof spring 91 sleeved on the circumferential outer side of the upper end of the movable valve rod 82, one end of the explosion-proof spring 91 is abutted against a spring limiting part 92 detachably mounted on the upper end of the movable valve rod 82, and the other end is abutted against the filter element base 52; the diameter of the spring limiting part 92 is larger than that of the movable valve rod 82, the spring limiting part 92 is connected with the movable valve rod 82 in a threaded manner, and the upper end surface of the spring limiting part 92 and the end surface of the end, connected with the movable valve rod 82, of the sewage discharging plug 86 are respectively formed on a stress surface 93; the lower end of the sewage outlet 13 is connected with a sewage connector 131, a sewage channel 132 communicated with the sewage outlet 13 is arranged in the sewage connector 131, the diameter of the sewage channel 132 is larger than that of the sewage outlet 13, a sewage plug 86 is integrally formed at the lower end of the movable valve rod 82, and the sewage plug 86 extends into the sewage channel 132; the diameter of the sewage discharge plug 86 is equal to that of the sewage discharge outlet 13, a sewage discharge sealing ring groove 861 is formed in the circumferential outer side of the sewage discharge plug 86, and a sewage discharge sealing ring body 862 abutting against the lower end of the sewage discharge outlet 13 is arranged in the sewage discharge sealing ring groove 861; or the diameter of the sewage discharge plug 86 is larger than that of the sewage discharge port 13, a plug limiting step 87 is formed between the sewage discharge port 13 and the sewage discharge channel 132, and the upper end of the sewage discharge plug 86 abuts against the sewage discharge limiting step; the circumferential inner sides of the upper end and the lower end of the sewage draining outlet 13 are respectively provided with an annular sewage draining inclined plane 133, the circumferential inner sides of the upper end and the lower end of the sewage draining plug 86 are respectively provided with an annular guide inclined plane 134, and the annular sewage draining inclined plane 133 at the lower end of the sewage draining outlet 13 is matched with the annular guide inclined plane 134 at the upper end of the sewage draining plug 86.
The principle of the embodiment is as follows: when the filter is in a normal filtering state, water flow enters from the water inlet 11 and enters the raw water cavity 16 through a gap between the circumferential outer side of the filter element cylinder 14 and the filter frame body 15, is filtered by the filter screen and then is discharged from the water channel in the lifting rotary seat body 42 through the water outlet 12,
when the filter needs to be cleaned, the rotating knob 432 is screwed to drive the driving rod body 431 to rotate circumferentially, when the filter core cylinder 14 descends, the circumferential outer side of the filter core cylinder 14 contacts with the filter frame body 15, water flow is forced to enter the water purification cavity 17 through the backwashing flow guide hole 44, the backwashing process is carried out from the inner side of the filter screen to the outer side, the filter core cylinder 14 rotates circumferentially and descends, the drain valve is opened, the filter core cylinder 14 rotates circumferentially relative to the filter frame body 15 in the descending process, the inner scraping strip 156 on the inner side of the filter frame body 15 scrapes and washes the filter screen firstly, when the filter core cylinder 14 descends to the lower end of the filter frame body 15, the two strips are positioned circumferentially through the clutch type circumferential positioning mechanism 5, in the process, the external thread of the external thread part 421 is separated from the internal thread 45, the rotating knob 432 can rotate without limit to drive the filter core cylinder 14 and the filter frame body 15 to rotate together, so that the external scraping strip 155 on the outer side of the filter frame body 15 can scrape and wash the inner wall of the filter cup body 18 infinitely, when the filtration state needs to be restored, that is, the filter cartridge body 14 needs to be moved upward, the rotation knob 432 is rotated reversely, and the male screw of the male screw portion 421 is engaged with the female screw 45 again by the pressing clutch spring 73, so that the filter cartridge body 14 is driven to rotate and rise in the circumferential direction.
Wherein, through set up movable valve rod 82 at filter housing 1 lower extreme, when water pressure exceeded the produced pressure of 10 kilograms of rivers, water pressure overcome the effort of elasticity roof pressure explosion-proof mechanism 9, thereby make movable valve rod 82 remove down and make blowdown end cap 86 break away from drain 13 to release rivers release pressure fast through drain 13, play the explosion-proof effect.
Simultaneously, the setting up of connecting pedestal 19 and quick detach pedestal 3 makes this back flush type prefilter dismantle more convenient, and can prevent rivers and heavy metal ion contactless each other, makes quality of water better.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the filter housing 1, the water inlet 11, the water outlet 12, the sewage outlet 13, the sewage connector 131, the sewage passage 132, the annular sewage inclined plane 133, the annular guide inclined plane 134, the filter cartridge body 14, the filter frame body 15, the outer scraping assembly 151, the inner scraping assembly 152, the scraping installation groove 153, the scraping installation part 154, the outer scraping strip 155, the inner scraping strip 156, the raw water cavity 16, the purified water cavity 17, the filter cup body 18, the cup body limiting step 181, the joint body 19, the water inlet pipe connector 191, the water outlet pipe connector 192, the water cavity 193, the blocking seat body 194, the cartridge inlet and outlet 195, the blocking tube body 196, the seat body positioning assembly 197, the pressing ring 1971, the annular external thread 1972, the annular internal thread 1973, the blocking seat limiting step 1974, the blocking seat sealing ring groove 1975, the blocking seat sealing ring body 1976, the quick-release connecting assembly 198, the first quick-release rib 1981, the second rib 1982, the axial limiting part 1983, the quick-release connecting assembly 1974, the quick-release seat sealing ring groove 1975, the quick-release groove with the first quick-release rib 1981, the second rib 1982, and the second rib-release groove, A circumferential limiting part 1984, a connecting seat limiting step 199, a clutch type scraping and washing driving device 2, a quick-release seat body 3, a seat body cylindrical part 31, a first sealing structure 32, a first sealing ring positioning groove 321, a first sealing ring body 322, a second sealing structure 33, a second sealing ring positioning groove 331, a second sealing ring body 332, a seat body end cover part 34, a scraping and washing driving mechanism 4, a driving sleeve body 41, a lifting and rotating seat body 42, an external thread part 421, a lifting and driving hole 422, a scraping and washing driving component 43, a driving rod body 431, a rotating knob 432, a backwashing flow guide hole 44, an internal thread 45, a lifting and driving part 46, a clutch type circumferential positioning mechanism 5, a frame base 51, a columnar body 511, a sewage discharge bottom cavity 512, a sewage discharge flow guide hole 513, a filter core base 52, a clutch type circumferential positioning component 6, a first clutch limiting bulge 61, a second clutch limiting bulge 62, an elastic jacking and clutching mechanism 7, a base hole 71, The base cylinder 72, the top pressure clutch spring 73, the explosion-proof pollution discharge control mechanism 8, the valve rod hole 81, the movable valve rod 82, the valve seat cylinder part 83, the valve rod limiting step 84, the valve rod limiting part 85, the pollution discharge plug 86, the pollution discharge sealing ring groove 861, the pollution discharge sealing ring body 862, the plug limiting step 87, the elastic top pressure explosion-proof mechanism 9, the explosion-proof spring 91, the spring limiting part 92, the stress surface 93 and other terms are used, but the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (7)
1. The utility model provides a backwash type prefilter, is including filter shell (1) that has water inlet (11) and delivery port (12), filter shell (1) lower extreme drain (13) have, filter shell (1) in be equipped with circumference filter core barrel (14) that have the filter screen, filter core barrel (14) circumference outside cover be equipped with and filter support body (15), have outside scraping and washing subassembly (151) and filter support body (15) circumference inboard that contact with the filter screen of contacting outside filtering support body (15) circumference outside, just filter screen circumference outside and filter shell (1) circumference inboard between form former water cavity (16), just filter screen circumference inboard be formed with water purification chamber (17) that are linked together with delivery port (12), water inlet (11) be linked together with former water cavity (16) or water purification chamber (17), the filter is characterized in that the filter frame body (15) rotates circumferentially and is positioned axially relative to the filter shell (1), and the filter element cylinder body (14) is connected with a clutch type scraping and washing driving device (2) which can communicate the water inlet (11) with the water purification cavity (17), and can enable the filter element cylinder body (14) to lift axially relative to the filter frame body (15) and circumferentially position the filter element cylinder body (14) and the filter frame body (15) after rotating circumferentially; the filter shell (1) comprises a filter cup body (18), a connecting seat body (19) is arranged at the upper end of the filter cup body (18), a water inlet (11) and a water outlet (12) are arranged on the connecting seat body (19), a quick-release seat body (3) is arranged at the upper end of the connecting seat body (19), and the filter cup body (18), the connecting seat body (19) and the quick-release seat body (3) are in quick-release connection; the clutch type scraping and washing driving device (2) comprises a scraping and washing driving mechanism (4) which is arranged between the filter shell (1) and the filter element cylinder (14), can drive the filter element cylinder (14) to axially move and circumferentially rotate relative to the filter frame body (15) and can communicate the water inlet (11) with the circumferential inner side of the filter screen, and a clutch type circumferential positioning mechanism (5) which can circumferentially position the filter element cylinder (14) and the filter frame body (15) after the filter element cylinder (14) axially moves downwards relative to the filter frame body (15) is arranged between the filter element cylinder (14) and the filter frame body (15); the scraping and washing driving mechanism (4) comprises a driving sleeve body (41) arranged in the quick-release base body (3), a lifting rotating base body (42) detachably connected with the upper end of the filter element cylinder body (14) penetrates through the driving sleeve body (41), a scraping and washing driving assembly (43) capable of enabling the lifting rotating base body (42) to axially move and circumferentially rotate relative to the driving sleeve body (41) is arranged between the driving sleeve body (41) and the lifting rotating base body (42), and a backwashing flow guide hole (44) capable of communicating the water inlet (11) with the water purification cavity (17) is formed in the circumferential outer side of the lower end of the lifting rotating base body (42); the scraping and washing driving assembly (43) comprises a driving rod body (431) which is circumferentially rotated and axially positioned and penetrates through the upper end of the driving sleeve body (41), the upper end of the driving rod body (431) is connected with a rotating knob (432) which is rotatably arranged at the upper end of the quick-release base body (3), the lower end of the driving rod body (431) is circumferentially positioned and axially slidably connected with the upper end of the lifting and rotating base body (42), an external thread part (421) with external threads on the circumferential outer side is arranged at the upper end of the lifting and rotating base body (42), and the external threads on the external thread part (421) are meshed with internal threads (45) arranged on the circumferential inner side of the driving sleeve body (41); the circumferential outer side of the upper end of the driving rod body (431) and the circumferential inner side of the driving sleeve body (41) are sealed with each other, the lower end of the driving rod body (431) is provided with a lifting driving part (46) with a non-circular cross section, the circumferential inner side of the external thread part (421) is provided with a lifting driving hole (422) matched with the lifting driving part (46), and the lifting driving part (46) and the lifting driving hole (422) axially slide and are circumferentially positioned; the clutch type circumferential positioning mechanism (5) comprises a frame body base (51) arranged on the circumferential inner side of the lower end of the filtering frame body (15), the lower end of the filter element cylinder body (14) is provided with a filter element base (52) penetrating through the circumferential inner side of the frame body base (51), and a clutch type circumferential positioning assembly (6) capable of positioning the frame body base (51) and the filter element base (52) in the circumferential direction when the frame body base and the filter element base are close to each other is arranged between the frame body base (51) and the filter element base (52); the clutch type circumferential positioning assembly (6) comprises at least one first clutch limiting bulge (61) arranged on the circumferential outer side of the bottom of the frame body base (51), and the lower end of the filter element base (52) is provided with at least one second clutch limiting bulge (62) which is arranged in a staggered manner with the first clutch limiting bulge (61) and is mutually abutted; an elastic jacking clutch mechanism (7) which can enable the external thread part (421) to keep moving trend towards the direction of the driving sleeve body (41) when the filter element cylinder body (14) and the filter frame body (15) are circumferentially positioned and the external thread of the external thread part (421) is mutually separated from the internal thread (45) of the driving sleeve body (41) is arranged between the lower end of the filter element cylinder body (14) and the filter shell body (1) so as to enable the external thread part (421) to be meshed with the internal thread (45) again when the external thread part (421) rotates reversely; the elastic jacking clutch mechanism (7) comprises a base hole (71) formed in the center of the frame body base (51), a base cylinder (72) inserted into the base hole (71) is arranged at the lower end of the filter element base (52), a jacking clutch spring (73) is arranged in the base cylinder (72), one end of the jacking clutch spring (73) acts on the filter element base (52), and the other end of the jacking clutch spring acts on the bottom of the filter shell (1).
2. The backwash type prefilter of claim 1 wherein said filter frame body (15) has a plurality of vertically disposed scraping and washing mounting slots (153) in its circumferential direction, said scraping and washing mounting slots (153) having scraping and washing mounting portions (154) mounted therein, and said scraping and washing mounting portions (154) having outer scraping and washing bars (155) on one side extending to the outside of the circumferential direction of the filter frame body (15) and contacting the inner wall of the filter bowl (18) to form the outer scraping and washing assembly (151) and inner scraping and washing bars (156) on the other side extending to the inside of the circumferential direction of the filter frame body (15) and contacting the outer wall of the filter screen to form the inner scraping and washing assembly (152); support body base (51) lower extreme be equipped with a plurality of with filter cup (18) bottom of filter casing (1) support by the columnar body (511) of setting, just support body base (51) and filter cup (18) between form blowdown bottom chamber (512) that are linked together with drain (13), have a plurality of blowdown water conservancy diversion holes (513) that are linked together with blowdown bottom chamber (512) in support body base (51) circumference.
3. The back-flushing prefilter of claim 2 wherein said connection base (19) is in the form of a cylinder with an open top and a bottom, said connection base (19) having a water inlet pipe connector (191) on one side and a water outlet pipe connector (192) on the other side, said water inlet (11) being formed on said water inlet pipe connector (191) and said water outlet (12) being formed on said water outlet pipe connector (192), said connection base (19) being circumferentially inwardly provided with a blocking base (194) having a water chamber (193) and capable of blocking said water chamber (193) from said connection base (19) circumferentially, said blocking base (194) being cylindrical and having a cylinder inlet/outlet (195) on said blocking base (194) for communicating said water inlet (11) and said water outlet (12) with said water chamber (193), said cylinder inlet/outlet (195) of said blocking base (194) being respectively connected with blocking tubes passing through said water inlet (11) and said water outlet (12) circumferentially inwardly (196) The connecting base body (19) is provided with a base body positioning component (197) which can detachably position the separation base body (194) in the connecting base body (19), and the upper end of the separation base body (194) and/or the upper end of the connecting base body (19) are connected with a quick-release base body (3) which can seal an opening at the upper end of the separation base body (194) through a quick-release connecting component (198); the seat body positioning assembly (197) comprises a pressing ring (1971) which is arranged on the circumferential inner side of an opening at the upper end of the connecting seat body (19) and is positioned at the upper end of the obstructing seat body (194) or the circumferential outer side of the obstructing seat body (194), the pressing ring (1971) is detachably connected with the connecting seat body (19), the pressing ring (1971) is annular, the circumferential outer side of the pressing ring (1971) is provided with an annular external thread (1972), the circumferential inner side of the opening at the upper end of the connecting seat body (19) is provided with an annular internal thread (1973) which is meshed with the annular external thread (1972), and the pressing ring (1971) is in threaded connection with the connecting seat body (19); the blocking seat is characterized in that the pressing ring (1971) is located between the circumferential outer side of the upper end of the blocking seat body (194) and the circumferential inner side of an opening of the upper end of the connecting seat body (19), the circumferential outer side of the blocking seat body (194) is provided with a blocking seat limiting step (1974) abutted against the pressing ring (1971), the circumferential outer side of the blocking seat limiting step (1974) is provided with a blocking seat sealing ring groove (1975), and the blocking seat sealing ring groove (1975) is provided with a blocking seat sealing ring body (1976) abutted against the circumferential inner side of the connecting seat body (19).
4. The back-flushing prefilter of claim 3 wherein said quick release housing (3) comprises a housing cylindrical portion (31) having a cylindrical shape and disposed through the inner circumferential side of said blocking housing (194), said quick release connecting assembly (198) is disposed between said housing cylindrical portion (31) and said blocking housing (194), a first sealing structure (32) is disposed between said housing cylindrical portion (31) and said blocking housing (194), said blocking housing (194) and said pressing ring (1971) have upper ends flush with each other and both extend beyond the upper end opening of said connecting housing (19), said upper end of said housing cylindrical portion (31) has a housing end cap portion (34) abutting against the upper end of said blocking housing (194) and/or said pressing ring (1971); the quick-release connecting assembly (198) comprises a plurality of first quick-release ribs (1981) arranged on the circumferential outer side of a cylindrical part (31) of the seat body, the circumferential inner side of the blocking seat body (194) is provided with a plurality of second quick-release ribs (1982) which are respectively in one-to-one correspondence with the first quick-release ribs (1981), the first quick-release ribs (1981) and the second quick-release ribs (1982) are respectively provided with an axial limiting part (1983) and a circumferential limiting part (1984), the axial limiting part (1983) of the first quick-release ribs (1981) and the axial limiting part (1983) of the second quick-release ribs (1982) are arranged in an up-and-down abutting mode, and one end of the axial limiting part (1983) of the first quick-release ribs (1981) or the second quick-release ribs (1982) abuts against the circumferential limiting part (1984) of the second quick-release ribs (1982) or the first quick-release ribs (1981); the first sealing structure (32) comprises a plurality of first sealing ring positioning grooves (321) which are arranged on the circumferential outer side of the seat body cylindrical part (31) or the circumferential inner side of the blocking seat body (194), and a first sealing ring body (322) which is abutted against the circumferential inner side of the blocking seat body (194) or the circumferential outer side of the seat body cylindrical part (31) is arranged in each first sealing ring positioning groove (321); the lower end of the connecting seat body (19) is axially limited relative to the upper end of the filtering cup body (18), and a second sealing structure (33) is arranged between the connecting seat body (19) and the filtering cup body (18); filter cup (18) upper end wear to locate and connect pedestal (19) circumference inboard, just connect pedestal (19) lower extreme circumference inboard have connecting seat limit step (199), just filter cup (18) upper end circumference outside have the cup limit step (181) that lower extreme and connecting seat limit step (199) supported each other, just cup limit step (181) upper end support with separation pedestal (194) and lean on, second seal structure (33) including a plurality of second sealing washer constant head tank (331) of setting on connecting seat limit step (199) or cup limit step (181), just second sealing washer constant head tank (331) in be equipped with and connect pedestal (19) circumference inboard or filter cup (18) circumference outside support second sealing washer body (332) that leans on.
5. A back-flush prefilter as claimed in claim 1 wherein the cartridge body (14) is provided at its lower end with an explosion-proof blowdown control mechanism (8) which opens or closes the blowdown port (13) when the cartridge body (14) is lifted axially and which has a pressure relief function when the blowdown valve is kept closed.
6. The back-flushing type prefilter of claim 5 wherein said explosion-proof pollution discharge control mechanism (8) comprises a valve stem hole disposed in a filter element base (52) at the lower end of said filter element cylinder (14), and a movable valve stem (82) is axially movably inserted in said valve stem hole, and said movable valve stem (82) is axially and unidirectionally limited with respect to said filter element base (52), respectively, said filter element base (52) has a valve seat cylinder (83) at the lower end thereof, said valve seat cylinder (83) has an inner diameter larger than the diameter of said valve stem hole, and a valve stem limiting step (84) is formed between the circumferential inner side of said valve seat cylinder (83) and the lower end surface of said filter element base (52), said movable valve stem (82) has two valve stem limiting parts (85) and one of said valve stem limiting parts (85) abuts against said valve stem limiting step (84), the rest valve rod limiting part (85) is abutted against the lower end face of the valve seat cylindrical part (83); the movable valve rod (82) is characterized in that the lower end of the movable valve rod (82) penetrates through the sewage outlet (13), a sewage discharge plug (86) capable of sealing the lower end of the sewage outlet (13) is arranged at the lower end of the movable valve rod (82), and an elastic jacking explosion-proof mechanism (9) capable of enabling the movable valve rod (82) to keep moving upwards so as to enable the sewage discharge plug (86) to be sealed in the sewage outlet (13) state is arranged between the upper end of the movable valve rod (82) and the filter element base (52).
7. The back-flushing prefilter of claim 6 wherein said resilient top pressure explosion-proof mechanism (9) comprises an explosion-proof spring (91) sleeved on the circumferential outer side of the upper end of said movable valve stem (82), and one end of said explosion-proof spring (91) is abutted against a spring limit part (92) detachably mounted on the upper end of said movable valve stem (82), and the other end is abutted against said filter cartridge base (52); the diameter of the spring limiting part (92) is larger than that of the movable valve rod (82), the spring limiting part (92) is connected with the movable valve rod (82) in a threaded mode, and the upper end face of the spring limiting part (92) and the end face of one end, connected with the movable valve rod (82), of the sewage discharge plug (86) are respectively formed on a stress surface (93); the lower end of the sewage draining outlet (13) is connected with a sewage draining joint (131), a sewage draining channel (132) communicated with the sewage draining outlet (13) is arranged in the sewage draining joint (131), the diameter of the sewage draining channel (132) is larger than that of the sewage draining outlet (13), the sewage draining plug (86) is integrally formed at the lower end of the movable valve rod (82), and the sewage draining plug (86) extends into the sewage draining channel (132); the diameter of the sewage discharge plug (86) is equal to that of the sewage discharge port (13), a sewage discharge sealing ring groove (861) is formed in the circumferential outer side of the sewage discharge plug (86), and a sewage discharge sealing ring body (862) abutted against the lower end of the sewage discharge port (13) is arranged in the sewage discharge sealing ring groove (861); or the diameter of the sewage discharge plug (86) is larger than that of the sewage discharge port (13), a plug limiting step (87) is formed between the sewage discharge port (13) and the sewage discharge channel (132), and the upper end of the sewage discharge plug (86) abuts against the sewage discharge limiting step; the sewage draining device is characterized in that the circumferential inner sides of the upper end and the lower end of the sewage draining port (13) are respectively provided with an annular sewage draining inclined plane (133), the circumferential inner sides of the upper end and the lower end of the sewage draining plug (86) are respectively provided with an annular guide inclined plane (134), and the annular sewage draining inclined plane (133) at the lower end of the sewage draining port (13) is matched with the annular guide inclined plane (134) at the upper end of the sewage draining plug (86).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110070130.2A CN112827235B (en) | 2021-01-19 | 2021-01-19 | Back-flushing type pre-filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110070130.2A CN112827235B (en) | 2021-01-19 | 2021-01-19 | Back-flushing type pre-filter |
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| Publication Number | Publication Date |
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| CN112827235A CN112827235A (en) | 2021-05-25 |
| CN112827235B true CN112827235B (en) | 2022-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110070130.2A Active CN112827235B (en) | 2021-01-19 | 2021-01-19 | Back-flushing type pre-filter |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115430190B (en) * | 2021-06-04 | 2023-12-19 | 浙江美固科技有限公司 | One-key back flushing prefilter |
| CN113509785A (en) * | 2021-07-27 | 2021-10-19 | 陶孟银 | Back-washing pre-filter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3842436A1 (en) * | 1988-12-16 | 1990-06-21 | Weinhold Karl | Pipe filter |
| CN208742034U (en) * | 2018-06-27 | 2019-04-16 | 海宁美康环保科技有限公司 | Lift backwash filter |
| CN111214880A (en) * | 2019-10-15 | 2020-06-02 | 海宁美康环保科技有限公司 | Automatic back-flushing filter |
| CN112169404A (en) * | 2020-11-11 | 2021-01-05 | 玉环市红日阀门有限公司 | Front filter |
-
2021
- 2021-01-19 CN CN202110070130.2A patent/CN112827235B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3842436A1 (en) * | 1988-12-16 | 1990-06-21 | Weinhold Karl | Pipe filter |
| CN208742034U (en) * | 2018-06-27 | 2019-04-16 | 海宁美康环保科技有限公司 | Lift backwash filter |
| CN111214880A (en) * | 2019-10-15 | 2020-06-02 | 海宁美康环保科技有限公司 | Automatic back-flushing filter |
| CN112169404A (en) * | 2020-11-11 | 2021-01-05 | 玉环市红日阀门有限公司 | Front filter |
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