CN101766927A - High-pressure and high-precision backwashing filtration station - Google Patents

Abstract

The invention relates to a high-pressure and high-precision backwashing filtration station which comprises a box body, a backwashing module and filters, wherein the module is arranged on a main body, and the two filters are arranged on the module; a filter core and a bypass valve are arranged in each filter; stop valves are arranged at the front end and the rear end of the module, and liquid flows through the module and the filters to realize the filtration; a liquid outlet of the backwashing module is directly discharged into a liquid box downwards, and the flow direction of liquid is controlled by an alternating one-way valve arranged in the module; and two groups of pressure gages arranged at the front and the back of the module respectively display pressures of high-pressure liquid before and after being filtered. When a pressure difference at two ends of the filter cores reaches a certain numerical value, an alarm device buzzes and gives an alarm. The filters have working states that both liquid flow directions are controlled by a three-position four-way hand-operated reversing valve, and the reversing valve is in a middle position under the normal working state. When the filter core at the left side or the right side needs to be backwashed, a handle is pulled leftwards or rightwards, and impurities at the outer side of the filter core flow out of a clearance generated when the valve cores are alternated. The high-pressure and high-precision backwashing filtration station is used for a hydraulic system of a mine fully-mechanized hydraulic support.

Description

High-pressure and high-precision backwashing filtration station

Technical field

The present invention relates to a kind of back-flushing filtering device, specifically, relate to the high-pressure and high-precision backwashing filtration station that use in a kind of colliery.

Background technology

The Hydraulic Elements of comprehensive mining hydraulic bracket support under the coal mine, be in down-hole coal dust high pollution environment, the hydraulic system emulsion tank very easily is subjected to the coal ash powder dust pollution, cause heel and toe wear or damage for each seal of hydraulic system, cause hydraulic system unit time internal fault to take place frequently, cause great harm situation for the fully-mechanized mining equipment operate as normal.Therefore, need the working media in hydraulic system source is filtered, make working media when entering the next stage element system, the working media cleannes are significantly improved, and give system element secondary filter and working condition and create good conditions.For this reason, that Chinese patent once disclosed was a kind of " big flow; high-precision backwashing filtration device " (China, notification number CN2768873Y, April 5 2006 day for announcing), it is a kind of heavy wool pipe filter, comprise valve body and filter core, described filter core is two skeleton filter cores, described two or more sets pairs skeleton stainless steel filter core, by parallel, place in the valve body in parallel, filter core forms " U " shape linker, the oil circuit that enters this filter core in the described valve body is provided with two or more 90 degree and rotates reversing ball, and it is to be drilled with 2 holes that become 90 degree on ball that described 90 degree rotate reversing ball, and is processed with groove, pass through handle, groove on the rotating shaft interlock ball is formed the commutation rotating mechanism.But it is a kind of filtration, backwash, the big flow by three functions, filter of high accuracy on-line cleaning of integrating, and it is simple in structure, and is easy to use.

Chinese patent once disclosed a kind of " backwash filter " (China, publication number CN1843558A, open day on October 11st, 2006), it comprises that having medium advances, the housing and the loam cake of outlet and sewage draining exit, ball valve connects sewage draining exit, be provided with the filter screen of band filter opening in the housing, its improvement is that the housing internal upper part is provided with spacer ring, on be covered with the lower port that stretches into the housing inner chamber, the filter screen radial location is installed in the housing and can moves up and down along housing, be provided with spring in filter screen and the housing at the end, convert the impeller that liquid flowing energy drives gyration to by the dielectric fluid pressure energy, filter screen is provided with the shoulder that changes the medium circulation, and this shoulder realizes filtering conversion with washing capacity by the switching that contacts with loam cake lower port or housing spacer ring respectively.It is skillfully constructed, and is simple in structure, can wash the impurity that embeds filter opening effectively, and flushing process need not to dispose power, can adopt thinner, the more filter screen of number, to obtain purer filter medium.

Chinese patent once disclosed a kind of " backwash filter " (China, notification number CN2889445Y, April 18 2007 day for announcing), it comprises a filter body, is provided with inlet and liquid outlet on this filter body, is provided with the interface that the pipeline with hydraulic system joins in the outside of inlet, wherein, on described filter body, also be provided with first filter chamber and second filter chamber, in first filter chamber, be fixed with first filter core, in second filter chamber, be fixed with second filter core; Between described first filter chamber and described inlet, be provided with the first backwash switch, between second filter chamber and second filter chamber, establish the second backwash switch, the first backwash switch is used for opening and closing first UNICOM's mouth that the inlet and first filter chamber are linked, and the second backwash switch is used for opening and closing the second UNICOM's mouth that makes the inlet and the second filter chamber UNICOM.It is promptly capable of washing that backwash filter filter core of the present utility model need not dismounting, need not to transport to the outer repair workshop of well and carry out, and saves time, laborsaving, greatly improved operating efficiency.

Chinese patent once disclosed a kind of " hydraulic support backwash filter " (China, notification number CN201098580Y, August 13 2008 day for announcing), comprise valve body and element kit, have inlet, liquid outlet, left liquid return hole, right liquid return hole on the valve body, left element kit and right element kit are installed in the valve body, backwash switch in the left and right sides is set, the backwash switch is made of valve seat, valve pad, commutation steel ball, rotating shaft and switch knob.During operate as normal, it can filter the impurity in the emulsion very effectively, and discharges by backwash, guarantees the cleannes of emulsion, avoid the hydraulic support operation that causes because of impurity ineffective, out of control, even the phenomenon of damaging takes place.

Above-mentioned four belong to backwash filter, are not suitable for the demanding occasion of nominal flow rate.

Chinese patent once disclosed a kind of " backwash high pressure filtering station " (China, publication number CN101349156A, open day on January 21st, 2009), the backwash module is housed on the assembly casing, the valve body of backwash module has input channel, output channel, the backwash passage, filter chamber, left side inlet and right filter chamber inlet, valve seat is all placed in backwash passage and porch, filter chamber, the left and right sides, valve pad and steel ball, steel ball is supporting with left and right sides operating mechanism respectively, fixing left and right sides backwash switch knob respectively on the operating mechanism of the left and right sides, have L shaped passage in the steel ball, filter chamber, left and right sides inlet connects filter chamber, the left and right sides, end connects filter chamber, left and right sides backwash outlet connection respectively about the backwash passage, input channel connects the input port joint, output channel connects the delivery outlet joint, filter chamber's backwash outlet connection in a left side is connected and preposition check valve by pipeline with right filter chamber's backwash outlet connection, the spherical stop valve of the preposition input of input port joint, the spherical stop valve of the rearmounted output of delivery outlet joint.It controls the inherent cleannes of comprehensive mining hydraulic bracket hydraulic work system medium emulsion under the coal mine from the source.But it also is not very good on structural design, causes operation inconvenience.

Summary of the invention

The object of the present invention is to provide a kind of high-pressure and high-precision backwashing filtration station, it carries out the filtration of one-level working media to the comprehensive hydraulic system initial level of adopting, from source control hydraulic work system medium cleannes, for hydraulic system provides the comparatively oil emulsion of cleaning, alleviate each element live load of subsystem, further improve the job stability of hydraulic system, reduce system failure incidence greatly, prolong the service life of each class component of hydraulic system, be applicable to the demanding occasion of nominal flow rate.

For achieving the above object, the solution that the invention is taked is: a kind of high-pressure and high-precision backwashing filtration station, it is made up of structural framing assembly casing, backwash module and the filter three parts of built-in liquid case, the backwash module is installed on the structural framing assembly casing, and two relatively independent filters are installed on the backwash module; Described filter is by filtering valve body, filter cylinder barrel, filter core, gland and bypass valve are formed, filter on the valve body and adorn filter core, the filter core overcoat filters cylinder barrel, filtering cylinder barrel is fixed on the filtration valve body, filter stationary gland on the cylinder barrel, filter and open the first warning mouth in the valve body, the second warning mouth, filter inlet, filtering outlet, change the liquid import, change the liquid outlet, first reports to the police mouthful and second mouth of reporting to the police communicates with filtration inlet and filtering outlet in the filtration valve body respectively, filter in the valve body and have a bypass cavity, bypass cavity and filtration inlet, filtering outlet, change the liquid import, changeing the liquid outlet communicates, in the bypass cavity bypass valve is set, bypass valve is by cross push rod, sealing gasket, pressure spring, spring housing and pressure regulation swivel nut constitute, have liquid-through hole in the cross push rod, sealing gasket is inserted in cross push rod seals liquid-through hole, spring housing, pressure spring is inserted in cross push rod, spring housing contacts with sealing gasket, pressure spring one end withstands spring housing, the other end withstands the pressure regulation swivel nut, the pressure regulation swivel nut is screwed into cross push rod, cross push rod is fixed in the bypass cavity, and two ports of bypass cavity are screwed into left screw plug and right screw plug respectively; Described backwash module is by main valve body, the control cover plate, piston, unidirectional valve seat, spring, nonreturn valve core, positioning sleeve constitutes, have a blind chamber in the main valve body, a cavity, an inlet, a liquid outlet, blind chamber left-hand rotation liquid mouth, blind chamber right-hand rotation liquid mouth, cavity left-hand rotation liquid mouth, cavity right-hand rotation liquid mouth, left side leakage fluid dram, right leakage fluid dram and a hand-operated direction valve inlet, cavity left-hand rotation liquid mouth, cavity right-hand rotation liquid mouth communicates with cavity, blind chamber left-hand rotation liquid mouth, blind chamber right-hand rotation liquid mouth communicates with blind chamber, left side leakage fluid dram, right leakage fluid dram is in the nonreturn valve core gap, inlet communicates with cavity, liquid outlet communicates with blind chamber, the hand-operated direction valve inlet communicates with inlet, leakage fluid dram, the logical liquid case of right leakage fluid dram, nonreturn valve core inserts unidirectional valve seat and constitutes the internal check valve assembly, nonreturn valve core inserts the outer check valve assembly of unidirectional valve seat formation after packing into spring, be respectively charged into the internal check valve assembly from the cavity two ends, the piston of packing into behind positioning sleeve and the outer check valve assembly, the cavity two-port fixedly has the control cover plate of control mouth respectively, in cavity, constitute two alternately check valves, the port securing cover plate in blind chamber, inlet taps into the liquid joint, liquid outlet picks out the liquid joint, the inlet hydraulic table is set on the liquid inlet joint, set out the hydraulic coupling table on the fluid joint, liquid inlet joint taps into the liquid stop valve, and the fluid joint picks out the liquid stop valve; On the structural framing assembly casing 3-position 4-way hand-operated direction valve is set, the 3-position 4-way hand-operated direction valve connects two control mouths and hand-operated direction valve inlet by high-pressure rubber pipe respectively; On the structural framing assembly casing warning device is installed, warning device connects the first warning mouth and the second warning mouth respectively.

This high-pressure and high-precision backwashing filtration station operation principle is summarized as follows:

When highly pressurised liquid was flowed through filter, the mechanical admixture in the liquid will be formed and stop up by filtration resistance, and the filter core two ends produce pressure reduction (the inlet hydraulic table is different with the manometric value of reading of fluid) immediately.Mechanical admixture on the filter core is many more, filter core pressure at two ends difference is big more, when pressure reduction reaches certain numerical value, the warning device buzzing that is installed on the structural framing assembly casing is reported to the police, then need carry out the backwash working procedure, otherwise will influence hydraulic work system efficient, seriously then cause the hydraulic support failure accident.As not backwash in time, pressure reduction continues to strengthen, and surpasses the bypass valve opening pressure in the filter, and then bypass valve is opened, continue to the hydraulic system feed flow, in order to avoid influence hydraulic work system, but must in time recoil or keep in repair.

The duty of filter is to control each other dielectric fluid flow path direction by a slice 3-position 4-way hand-operated direction valve.In normal operation, 3-position 4-way hand-operated direction valve handgrip is in meta, liquid medium is by the S type passage in the main valve body and filter valve channel two filters of can flowing through simultaneously smoothly, for hydraulic system provides comparatively cleaning media fluid through primary filter.When the filter core of need backwash left side, pull 3-position 4-way hand-operated direction valve handgrip left, then backwash module left side alternately check valve spool moves right, and feed liquor liquid sealed, backwash module liquid outlet liquid flows out filter core outside impurity by the reverse flow liquid of back-flushing filtering device from replacing check valve spool gap location.When the filter core of need backwash right side, pull 3-position 4-way hand-operated direction valve handgrip and get final product to the right.

This high-pressure and high-precision backwashing filtration station filters the working media in hydraulic system source, make working media when entering each element system of next stage, the working media cleannes are improved significantly, give system element secondary filter and working condition and create fabulous condition, embody each subsystem component service behaviour better, improve greatly and the operating efficiency that has improved hydraulic system itself and each element.Its product with compact structure, long, easy to operate, consumable accessory standardization of life-span, it is easy to maintenance to change part.

Description of drawings

Fig. 1 is a present embodiment master TV structure schematic diagram.

Fig. 2 is a present embodiment left side TV structure schematic diagram.

Fig. 3 is the present embodiment fundamental diagram.

Fig. 4 is a present embodiment sectional structure schematic diagram.

Fig. 5 is that cross-sectional view is looked on the backwash module right side.

Fig. 6 is that backwash module master looks cross-sectional view.

Among the figure: 1, structural framing assembly casing, 2, the backwash module, 3, filter, 4, filter valve body, 5, filter cylinder barrel, 6, filter core, 7, gland, 8, the first warning mouth, 9, the second warning mouth, 10, filter inlet, 11, filtering outlet, 12, change the liquid import, 13, change the liquid outlet, 14, the bypass cavity, 15, cross push rod, 16, sealing gasket, 17, pressure spring, 18, spring housing, 19, the pressure regulation swivel nut, 20, liquid-through hole, 21, left side screw plug, 22, right screw plug, 23, main valve body, 24, the control cover plate, 25, piston, 26, unidirectional valve seat, 27, spring, 28, nonreturn valve core, 29, positioning sleeve, 30, blind chamber, 31, cavity, 32, inlet, 33, liquid outlet, 34, blind chamber left-hand rotation liquid mouth, 35, blind chamber right-hand rotation liquid mouth, 36, cavity left-hand rotation liquid mouth, 37, cavity right-hand rotation liquid mouth, 38, left side leakage fluid dram, 39, right leakage fluid dram, 40, the hand-operated direction valve inlet, 41, cover plate, 42, liquid inlet joint, 43, the inlet hydraulic table, 44, the fluid Pressure gauge, 45, the feed liquor stop valve, 46, the fluid stop valve, 47, the 3-position 4-way hand-operated direction valve, 48, the control mouth, 49, warning device, 50, compression spring, 51, pumping plant, 52, high-pressure rubber pipe, 53, hook, 54, bypass valve, 55, replace check valve, 56, the fluid joint.

The specific embodiment

Below in conjunction with embodiment and accompanying drawing thereof the present invention is remake description.

Present embodiment is the FLGLZ2000A high-pressure and high-precision backwashing filtration station.

Referring to Fig. 1-Fig. 6, a kind of high-pressure and high-precision backwashing filtration station, it is made up of structural framing assembly casing 1, backwash module 2 and filter 3 three parts of built-in liquid case, backwash module 2 is installed on the structural framing assembly casing 1, and two relatively independent filters 3 are installed on the backwash module 2; Described filter 3 is by filtering valve body 4, filter cylinder barrel 5, filter core 6, gland 7 and bypass valve 54 are formed, filter dress filter core 6 on the valve body 4, filter core 6 overcoats filter cylinder barrel 5, filtering cylinder barrel 5 is fixed on the filtration valve body 4, filter stationary gland 7 on the cylinder barrel 5, filter and open the first warning mouth 8 in the valve body 4, the second warning mouth 9, filter inlet 10, filtering outlet 11, change liquid import 12, change liquid outlet 13, first report to the police mouthful 8 and second report to the police mouthfuls 9 respectively with filter valve body 4 in filtration inlet 10 and filtering outlet 11 communicate, filter in the valve body 4 and have a bypass cavity 14, bypass cavity 14 and filtration inlet 10, filtering outlet 11, change liquid import 12, changeing liquid outlet 13 communicates, bypass valve 54 is set in the bypass cavity 14, bypass valve 54 is by cross push rod 15, sealing gasket 16, pressure spring 17, spring housing 18 and pressure regulation swivel nut 19 constitute, have liquid-through hole 20 in the cross push rod 15, sealing gasket 16 is inserted in cross push rod 15 seals liquid-through hole 20, spring housing 18, pressure spring 17 is inserted in cross push rod 15, spring housing 18 contacts with sealing gasket 16, pressure spring 17 1 ends withstand spring housing 18, the other end withstands pressure regulation swivel nut 19, pressure regulation swivel nut 19 is screwed into cross push rod 15, cross push rod 15 is fixed in the bypass cavity 14, and two ports of bypass cavity 14 are screwed into left screw plug 21 and right screw plug 22 respectively; Described backwash module 2 is by main valve body 23, control cover plate 24, piston 25, unidirectional valve seat 26, spring 27, nonreturn valve core 28, positioning sleeve 29 constitutes, have a blind chamber 30 in the main valve body 23, a cavity 31, an inlet 32, a liquid outlet 32, blind chamber left-hand rotation liquid mouth 34, blind chamber right-hand rotation liquid mouth 35, cavity left-hand rotation liquid mouth 36, cavity right-hand rotation liquid mouth 37, left side leakage fluid dram 38, right leakage fluid dram 39 and a hand-operated direction valve inlet 40, cavity left-hand rotation liquid mouth 36, cavity right-hand rotation liquid mouth 37 communicates with cavity 31, blind chamber left-hand rotation liquid mouth 34, blind chamber right-hand rotation liquid mouth 35 communicates with blind chamber 30, left side leakage fluid dram 38, right leakage fluid dram 39 is in nonreturn valve core 28 gaps, inlet 32 communicates with cavity 31, liquid outlet 33 communicates with blind chamber 30, hand-operated direction valve inlet 40 communicates with inlet 32, leakage fluid dram 38, right leakage fluid dram 39 logical liquid casees, nonreturn valve core 28 inserts unidirectional valve seat 26 and constitutes the internal check valve assembly, nonreturn valve core 28 packs into spring 27 backs and inserts the outer check valve assembly of unidirectional valve seat 26 formations, be respectively charged into the internal check valve assembly from cavity 31 two ends, the piston 25 of packing into behind positioning sleeve 29 and the outer check valve assembly, cavity 31 two-port fixedly have the control cover plate 27 of control mouth 48 respectively, in cavity 31, constitute two alternately check valves 55, the port securing cover plate 41 in blind chamber 30, inlet 32 taps into liquid joint 42, liquid outlet 33 picks out liquid joint 56, inlet hydraulic table 43 is set on the liquid inlet joint 42, set out hydraulic coupling table 44 on the fluid joint 56, liquid inlet joint 42 taps into liquid stop valve 45, and fluid joint 56 picks out liquid stop valve 46; 1 is provided with 3-position 4-way hand-operated direction valve 47 on the structural framing assembly casing, and 3-position 4-way hand-operated direction valve 47 connects two control mouths 48 and hand-operated direction valve inlet 40 by high-pressure rubber pipe 52 respectively; Warning device 49 is installed on the structural framing assembly casing 1, and warning device 49 connects first warning mouthful 8 and second warning mouth 9 respectively.

Referring to Fig. 4, between described filter core 6 and the gland 7 compression spring 50 is arranged.Like this, filter core 6 is more firm.

Referring to Fig. 4, dress hook 53 is convenient to dismounting on the described gland 7.

Referring to Fig. 6, described left leakage fluid dram 38 and right leakage fluid dram 39 are Φ 18mm.Left side leakage fluid dram 38 and right leakage fluid dram 39 use as the backwash mouth.

The technical specification of present embodiment is as follows:

Maximum working pressure (MWP): 31.5MPa,

Filtering accuracy: 40 μ m/25 μ m,

Nominal flow rate: 〉=2000L/min

Connect: input: DN40G or by customer requirement, output: DN40G or by customer requirement,

Working media is emulsion (meet the MT76-2002 standard, oil emulsion and neutral water was by weight ratio preparation in 5: 95),

Operating temperature is 10～50 ℃.

Referring to Fig. 1-Fig. 6, during use, the FLGLZ2000A high-pressure and high-precision backwashing filtration station is installed on the working face crossheading, and pumping plant 51 (emulsion pump) links to each other with feed liquor stop valve 45, and fluid stop valve 46 links to each other with working surface hydraulic support.

The duty of filter 3 is to control each other dielectric fluid flow path direction by a slice 3-position 4-way hand-operated direction valve 40.

In normal operation, 3-position 4-way hand-operated direction valve 40 handgrips are in meta, highly pressurised liquid is by the inlet 32 in the main valve body 23, cavity 31, the cavity left-hand rotation liquid mouth 36 of flowing through simultaneously, cavity right-hand rotation liquid mouth 37, enter and filter valve body 4 transfer liquid imports 12, bypass cavity 14 and filtration inlet 10, liquid medium filters to come out from filtering outlet 11 through filter core 6, enter blind chamber 30 in the main valve body 23, come out from liquid outlet 33, be highly pressurised liquid by the S type passage in the main valve body 23 and filter valve body 4 passages two filters 3 of can flowing through simultaneously smoothly, for hydraulic system provides the comparatively emulsion of cleaning, alleviate each element live load of subsystem, further improve hydraulic system and job stability, reduce system failure incidence greatly, prolong the service life of each class component of hydraulic system.

When highly pressurised liquid was flowed through filter 3, the mechanical admixture in the liquid will be formed and stop up by filtration resistance, and filter core 6 two ends produce pressure reduction (inlet hydraulic table 43 is different with the value of reading of fluid Pressure gauge 44) immediately.Mechanical admixture on the filter core 6 is many more, filter core 6 pressure at two ends differences are big more, when pressure reduction reaches certain numerical value, be installed in warning device 49 buzzings on the structural framing assembly casing 1 report to the police (because first report to the police mouthful 8 and second report to the police mouthfuls 9 respectively with filter valve body 4 in filtration inlet 10 and filtering outlet 11 communicate, warning device 49 connects first warning mouthful 8 and second warning mouth 9 respectively), then need carry out the backwash working procedure, otherwise will influence hydraulic work system efficient, seriously then cause failure accident.As not backwash in time, pressure reduction continues to strengthen, and surpasses bypass valve 54 opening pressures in the filter 3, this pressure overcomes the active force of pressure spring 17, back down sealing gasket 16, promptly bypass valve 54 is opened, and highly pressurised liquid flows out from liquid-through hole 20, through changeing liquid outlet 13, coming out from liquid outlet 33 in the blind chamber 30 of flowing through, continues to hydraulic system feed flow (liquid medium of filtered), in order to avoid influence hydraulic work system, but must in time recoil or keep in repair.

When the filter core 6 on the left of the need backwash, pull 3-position 4-way hand-operated direction valve 47 handgrips and arrive self-locking position left, hand-operated direction valve inlet 40 communicates with inlet 32, highly pressurised liquid comes out to enter 3-position 4-way hand-operated direction valve 47 from hand-operated direction valve inlet 40, left side control mouth 48 by backwash module 2, promote piston 25, overcome spring 27 resistances, outer check valve assembly and internal check valve assembly are moved right, promptly alternately check valve 55 is opened, and with the sealing of feed liquor liquid, highly pressurised liquid is through cavity left-hand rotation liquid mouth 36, by bypass valve 54, enter filter core 6, promptly highly pressurised liquid is by filter 3 reverse flow liquids, with the impurity flushing in filter core 6 outsides, impure liquid flows out from the gap location of nonreturn valve core 28, arrives the liquid case through left leakage fluid dram 38.When the filter core 6 on need backwash right side, pull 3-position 4-way hand-operated direction valve 40 handgrips and get final product to the right.

During debugging, avoid throwing open feed liquor stop valve 45, because unexpected pressurization may damage the equipment of system or back.Operating personnel are responsible for installing the high-pressure hose 52 of input and output, and fixed spacing to high-pressure hose 52, avoid high-pressure hose 52 swings to hurt sb.'s feelings, have only and determined that all connections have all installed in accordance with regulations, just can start high-pressure and high-precision backwashing filtration station.The feed liquor stop valve 45 of input side slowly opened make the medium that will filter flow into backwash module 2.Notice whether running check leaks, if leak, release is immediately handled.

Operating personnel are responsible for the backwash work of filter 3.The filter effect of filter 3 depends on the pollution level of filter liquide, therefore can't provide concrete backwashing time and frequency, a backwash is done in general each filter core 6 per tour of suggestion at least, and when the medium of filtration was very dirty, the effect of the root root to filter was carried out repeatedly backwash.Backwash process should continue several seconds, and after first filter core 6 finished backwash, second filter core 6 carried out backwash after the same method.

Claims (4)

1. high-pressure and high-precision backwashing filtration station, it is by the structural framing assembly casing (1) of built-in liquid case, backwash module (2) and filter (3) three parts are formed, backwash module (2) is installed on the structural framing assembly casing (1), two relatively independent filters (3) are installed on the backwash module (2), it is characterized in that: described filter (3) is by filtering valve body (4), filter cylinder barrel (5), filter core (6), gland (7) and bypass valve (54) are formed, filter valve body (4) and go up dress filter core (6), filter core (6) overcoat filters cylinder barrel (5), filtering cylinder barrel (5) is fixed on the filtration valve body (4), filter cylinder barrel (5) and go up stationary gland (7), filter and open first warning mouthful (8) in the valve body (4), second warning mouthful (9), filter inlet (10), filtering outlet (11), change liquid import (12), change liquid outlet (13), first report to the police mouthful (8) and second report to the police mouthful (9) respectively with filter valve body (4) in filtration enter the mouth (10) and filtering outlet (11) communicates, filter in the valve body (4) and have a bypass cavity (14), bypass cavity (14) and filtration inlet (10), filtering outlet (11), change liquid import (12), changeing liquid outlet (13) communicates, bypass valve (54) is set in the bypass cavity (14), bypass valve (54) is by cross push rod (15), sealing gasket (16), pressure spring (17), spring housing (18) and pressure regulation swivel nut (19) constitute, have liquid-through hole (20) in the cross push rod (15), sealing gasket (16) is inserted in cross push rod (15) seals liquid-through hole (20), spring housing (18), pressure spring (17) is inserted in cross push rod (15), spring housing (18) contacts with sealing gasket (16), pressure spring (17) one ends withstand spring housing (18), the other end withstands pressure regulation swivel nut (19), pressure regulation swivel nut (19) is screwed into cross push rod (15), cross push rod (15) is fixed in the bypass cavity (14), and two ports of bypass cavity (14) are screwed into left screw plug (21) and right screw plug (22) respectively; Described backwash module (2) is by main valve body (23), control cover plate (24), piston (25), unidirectional valve seat (26), spring (27), nonreturn valve core (28), positioning sleeve (29) constitutes, have a blind chamber (30) in the main valve body (23), a cavity (31), an inlet (32), a liquid outlet (32), blind chamber left-hand rotation liquid mouth (34), blind chamber right-hand rotation liquid mouth (35), cavity left-hand rotation liquid mouth (36), cavity right-hand rotation liquid mouth (37), left side leakage fluid dram (38), a right leakage fluid dram (39) and a hand-operated direction valve inlet (40), cavity left-hand rotation liquid mouth (36), cavity right-hand rotation liquid mouth (37) communicates with cavity (31), blind chamber left-hand rotation liquid mouth (34), blind chamber right-hand rotation liquid mouth (35) communicates with blind chamber (30), left side leakage fluid dram (38), right leakage fluid dram (39) is in nonreturn valve core (28) gap, inlet (32) communicates with cavity (31), liquid outlet (33) communicates with blind chamber (30), hand-operated direction valve inlet (40) communicates with inlet (32), leakage fluid dram (38), the logical liquid case of right leakage fluid dram (39), nonreturn valve core (28) inserts unidirectional valve seat (26) and constitutes the internal check valve assembly, nonreturn valve core (28) packs into spring (27) back and inserts the outer check valve assembly of unidirectional valve seat (26) formation, be respectively charged into the internal check valve assembly from cavity (31) two ends, the piston (25) of packing into behind positioning sleeve (29) and the outer check valve assembly, cavity (31) two-port fixedly has the control cover plate (27) of control mouthful (48) respectively, in cavity (31), constitute two alternately check valves (55), the port securing cover plate (41) in blind chamber (30), inlet (32) taps into liquid joint (42), liquid outlet (33) picks out liquid joint (56), inlet hydraulic table (43) is set on the liquid inlet joint (42), set out hydraulic coupling table (44) on the fluid joint (56), liquid inlet joint (42) taps into liquid stop valve (45), and fluid joint (56) picks out liquid stop valve (46); (1) is provided with 3-position 4-way hand-operated direction valve (47) on the structural framing assembly casing, and 3-position 4-way hand-operated direction valve (47) connects two controls mouthful (48) and hand-operated direction valve inlets (40) by high-pressure rubber pipe (52) respectively; Structural framing assembly casing (1) is gone up warning device (49) is installed, and warning device (49) connects first respectively and reports to the police mouthful (8) and second warning mouthful (9).

2. high-pressure and high-precision backwashing filtration station according to claim 1 is characterized in that: between described filter core (6) and the gland (7) compression spring (50) is arranged.

3. high-pressure and high-precision backwashing filtration station according to claim 1 is characterized in that: described gland (7) is gone up dress hook (53).

4. high-pressure and high-precision backwashing filtration station according to claim 1 is characterized in that: described left leakage fluid dram (38) and right leakage fluid dram (39) are Φ 18mm.

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