CN103697174B - A kind of mechanical filter element service life monitoring valve - Google Patents
A kind of mechanical filter element service life monitoring valve Download PDFInfo
- Publication number
- CN103697174B CN103697174B CN201310747792.4A CN201310747792A CN103697174B CN 103697174 B CN103697174 B CN 103697174B CN 201310747792 A CN201310747792 A CN 201310747792A CN 103697174 B CN103697174 B CN 103697174B
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- China
- Prior art keywords
- spool
- outlet
- aquaporin
- water inlet
- element kit
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Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 102000010637 Aquaporins Human genes 0.000 claims abstract description 36
- 108010063290 Aquaporins Proteins 0.000 claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims abstract description 8
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 4
- 230000035515 penetration Effects 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
-
- 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
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
- B01D35/046—Plug, tap, or cock filters filtering elements mounted in or on a faucet the filtering element being mounted in the faucet plug
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
Abstract
The invention discloses a kind of mechanical filter element service life monitoring valve, include valve body, valve body offers water inlet and outlet, between water inlet and outlet, form aquaporin, wherein, crossing and be provided with mechanism for monitoring in aquaporin, mechanism for monitoring is by valve gap, elastic component and the spool crossing aquaporin for opening and closing, and valve gap is fixed on valve body, spool was placed in aquaporin, elastic component one end and valve gap offset, and its other end and spool offset, and spool is provided with sealing gasket；Spool is subject to hydraulic pressure impact compress elastic component and backed down aquaporin。The present invention, by whether the unlatching of the spool of mechanism for monitoring points out the replacing construction of filter element, its simple in construction, adopts frame for movement prompting element kit to need to change, it is not necessary to connecing electricity work, use cost is low, uses safety；It can accurately point out the replacing construction of element kit, it is to avoid the waste of filter element。
Description
Technical field
The present invention relates to purifier and manufacture field, especially a kind of mechanical filter element service life monitoring valve。
Background technology
Current water purifier on the market, all can use element kit, and element kit has certain service life, after exceeding service life, the filter effect of element kit will decline and even cannot play the effect of filtration, at this time, it may be necessary to element kit is carried out instant replacing。
The control in element kit life-span generally can be divided into two kinds:
First method is that on by specification, the life time of the element kit of prompting regularly replaces；But the water quality in each area is different, identical element kit is different for its service life for different regions, moreover there is also the difference of quality between each element kit individuality, if before the replacing construction of prompting, element kit lost efficacy, then cannot playing the effect of filtration, if after the replacing construction of prompting, the effect of element kit still very good but having carried out in advance changes the waste that then can cause filter material。
Second method is by flow indication function prompting changing element kit, but realizes this function and necessarily need external power supply, cannot realize the function of element kit life-span display under power free state, and therefore its use has significant limitation。Additionally, the effective object of purifier is water, equipment is installed electronic component the use that is energized, there is potential safety hazard。
Therefore, all there is shortcoming in the reminding method of existing replacing element kit, it is further improved。
Summary of the invention
The technical problem to be solved is the present situation for prior art, it is provided that simple in construction, and use cost is low and can accurately point out a kind of mechanical filter element service life of filter element replacing time to monitor valve。
This invention address that the technical scheme that above-mentioned technical problem adopts is:
A kind of mechanical filter element service life monitoring valve, include valve body, valve body offers water inlet and outlet, between water inlet and outlet, form aquaporin, wherein, crossing and be provided with mechanism for monitoring in aquaporin, mechanism for monitoring is by valve gap, elastic component and the spool crossing aquaporin for opening and closing, and valve gap is fixed on valve body, spool was placed in aquaporin, elastic component one end and valve gap offset, and its other end and spool offset, and spool is provided with sealing gasket；Spool is subject to hydraulic pressure impact compress elastic component and backed down aquaporin。
The technical measures optimized also include:
Above-mentioned water inlet is vertically arranged to the lower end of valve body, and outlet is horizontally set at the right side of valve body, and water inlet and outlet are vertical setting。
Above-mentioned mechanism for monitoring is placed in the extension of described valve body, and the bottom of valve gap is shaped with Plug Division, and the upper end of extension is shaped with the inserting groove suitable with described Plug Division。
Above-mentioned inserting groove opening part is shaped with chamfering。
Above-mentioned elastic component is spring, and the upper end of spool is provided with the annular groove suitable with described spring, and the lower end of spring is embedded in annular groove。
The middle part of above-mentioned spool is shaped with gasket slot, and the inner circumferential of sealing gasket is placed in gasket slot；The periphery of the lower end of spool is a conical surface。
Above-mentioned water inlet is connected with the outlet of element kit by water inlet pipe, is provided with the first O between outer wall and the water inlet inwall of water inlet pipe。
Above-mentioned outlet is connected with the import of depotition cock by outlet pipe, is provided with the second O between outer wall and the outlet inwall of outlet pipe。
Above-mentioned water inlet and outlet are provided with end cap。
The unlatching pressure of above-mentioned spool is 0.05MPa。
A kind of mechanical filter element service life monitoring valve of the present invention, adopt and mechanism for monitoring is set crossing in aquaporin of valve body, this mechanism for monitoring is made up of valve gap, elastic component and spool, spool was blocked aquaporin under the effect of elastic component and was made monitoring valve close, when water impact spool produce hydraulic pressure thus compressing spool, make spool compression elastic piece thus opened aquaporin and make monitoring valve open；When element kit is close to service life, the discharge reduction passed through from element kit, therefore hydraulic pressure will reduce, and hydraulic pressure cannot promote spool after reducing, and monitoring valve namely cannot be made to open；When the anhydrous outflow of the outlet monitoring valve, illustrating that filter element life expires needs to change。This monitoring valve arrangement is simple, adopts frame for movement prompting element kit to need to change, it is not necessary to connecing electricity work, use cost is low, uses safety；It can accurately point out the replacing construction of element kit, it is to avoid the waste of filter element。
The extension grafting quota of valve gap and valve body, easy to connect；And extension inserting groove opening part is shaped with chamfering, the assembling making valve gap is convenient。
The setting of sealing gasket ensure that the sealing between spool and valve body；And the middle part of spool is shaped with gasket slot, the inner circumferential of sealing gasket is placed in gasket slot, it is ensured that in spool active procedure, sealing gasket does not come off。
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram that the present invention crosses when aquaporin is closed；
Fig. 2 is I portion enlarged drawing in Fig. 1；
Fig. 3 is II enlarged drawing in Fig. 1；
Fig. 4 is the sectional structure schematic diagram that the present invention crosses when aquaporin starts。
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail。
It is the structural representation of the present invention as shown in Figures 1 to 4,
Accompanying drawing therein is labeled as: valve body 1, excessively aquaporin 1a, water inlet 11, outlet 12, extension 13, inserting groove 13a, chamfering 13b, valve gap 2, Plug Division 21, elastic component 3, spool 4, conical surface 4a, annular groove 41, gasket slot 42, sealing gasket 5, water inlet pipe 61, outlet pipe the 62, first O the 71, second O 72, end cap 8；The direction of arrow in accompanying drawing represents water (flow) direction。
As shown in Figures 1 to 4,
A kind of mechanical filter element service life monitoring valve of the present invention, include valve body 1, valve body 1 offers water inlet 11 and outlet 12, aquaporin 1a was formed between water inlet 11 and outlet 12, wherein, cross in aquaporin 1a and be provided with mechanism for monitoring, mechanism for monitoring is by valve gap 2, elastic component 3 and the spool 4 crossing aquaporin 1a for opening and closing, valve gap 2 is fixed on valve body 1, spool 4 was placed in aquaporin 1a, elastic component 3 one end and valve gap 2 offset, and its other end and spool 4 offset, and spool 4 is provided with sealing gasket 5；Spool 4 is subject to hydraulic pressure impact compress elastic component 3 and backed down aquaporin 1a。
When monitoring valve cuts out, spool 4 is subject to the elastic force effect of elastic component 3 and blocked aquaporin 1a；When depotition cock is opened and is discharged water, current enter water inlet 11 and impact spool 4, spool 4 receives the impact of current and compression elastic piece 3, elastic component 3 stress is compressed, so that spool 4 moves upward and opened aquaporin 1a, now monitoring valve is opened, and current flow into from water inlet 11, flow out from outlet 12。
In embodiment, water inlet 11 is vertically arranged to the lower end of valve body 1, and outlet 12 is horizontally set at the right side of valve body 1, and water inlet 11 and outlet 12 are vertical setting。
In embodiment, mechanism for monitoring is placed in the extension 13 of described valve body 1, and the bottom of valve gap 2 is shaped with Plug Division 21, and the upper end of extension 13 is shaped with the inserting groove 13a suitable with described Plug Division 21。
In embodiment, inserting groove 13a opening part is shaped with chamfering 13b。
Extension 13 is vertically arranged on valve body 1, and valve gap 2 coordinates with extension 13 grafting, easy to connect。The step that between Plug Division 21 and the end face of valve gap 2, Formation cross-section is of an L-shaped structure；The inwall phase close-fitting of the periphery of Plug Division 21 and inserting groove 13a。The setting of chamfering 13b makes valve gap 2 convenient when assembling, also makes processing be more prone to。
In embodiment, elastic component 3 is spring, and the upper end of spool 4 is provided with the annular groove 41 suitable with described spring, and the lower end of spring is embedded in annular groove 41。The setting of annular groove 41 makes the bottom of spring be embedded in this annular groove 41, it is to avoid occur during spring stress that the phenomenon horizontally slipping and causing unbalance stress produces；The setting of annular groove 41 also makes spring convenient when assembling。
In embodiment, the middle part of spool 4 is shaped with gasket slot 42, and the inner circumferential of sealing gasket 5 is placed in gasket slot 42；The periphery of the lower end of spool 4 is a conical surface 4a。
When spool 4 is closed, the lower surface of sealing gasket 5 offsets with the step in valve body 1, and sealing gasket 5 ensure that the sealing between spool 4 and valve body 1, it is ensured that will not leak。And the inner circumferential of sealing gasket 5 is placed in gasket slot 42, it is ensured that in spool 4 active procedure, sealing gasket 5 does not come off, it is ensured that the stability of monitoring valve use and reliability。The setting of spool 4 lower end conical surface 4a, not only makes the installation of spool 4 become convenient, and adds the lifting surface area of spool 4 lower surface。
In embodiment, water inlet 11 is connected with the outlet of element kit by water inlet pipe 61, is provided with the first O 71 between outer wall and water inlet 11 inwall of water inlet pipe 61。
In embodiment, outlet 12 is connected with the import of depotition cock by outlet pipe 62, is provided with the second O 72 between outer wall and outlet 12 inwall of outlet pipe 62。
In embodiment, water inlet 11 and outlet 12 are provided with end cap 8。
Water inlet pipe 61 and outlet pipe 62 are made by PE pipe。
In embodiment, the unlatching pressure of spool 4 is 0.05MPa。The pressure of opening of spool 4 is set according to the actual demand of product, and the pressure of opening of spool 4 depends on effective lifting surface area of spool 4 lower surface and the elastic strength of elastic component 3。In the present embodiment, unlatching pressure is 0.05MPa, and namely when hydraulic pressure is more than 0.05MPa, spool 4 is opened, and when hydraulic pressure is less than 0.05MPa, spool 4 then cannot be opened。
Operation principle:
This monitoring valve is easy to use, applied widely, only need to be installed on is built-in with between the water purifier of element kit and depotition cock, is connected with the filter cartridge module outlet of water purifier by the water inlet pipe 61 on water inlet 11, is connected with depotition cock by the outlet pipe 62 on outlet 12。
Element kit adopts the method for physical filtering to remove the impurity in water, thus playing the purpose purified water, the surface of element kit is covered with aperture, between when deployed long after, aperture can be blocked by impurity, aperture be blocked after permeability rate decline, hydraulic pressure after element kit will reduce, when the permeability rate of element kit is reduced to a certain degree, element kit just cannot re-use, it is necessary to is replaced。
This monitoring valve is that this characteristic prompting element kit utilizing element kit needs to change。
When the strainability of element kit is good, water through filter element for purifier assembly flows in valve body 1 by water inlet pipe 61, current flow up impact spool 4 in water inlet 11, spool 4 is subject to impact compression elastic piece 3, and owing to the strainability of element kit is good, water penetration is high, enough water pressure pushing spools 4 can be produced and move upward thus opened aquaporin 1a, crossing after aquaporin 1a opens, current stream is through aquaporin 1a, and is flowed out from depotition cock by outlet pipe 62。When the strainability of element kit is good, the hydraulic pressure of generation is more than the unlatching pressure of spool 4, and hydraulic pressure is provided by water pipe pipe network。
When element kit lost efficacy, owing to the water penetration of element kit declines, after element kit, hydraulic pressure can decline, and now, produced hydraulic pressure is not enough to promote spool 4 to move upward thus opened aquaporin 1a, therefore, water will not be had to flow out from outlet 12。When water cannot flow out from outlet 12, namely prompting element kit needs to change。
This monitoring valve is applicable to different regions, different quality region, it is possible to accurately point out the replacing construction of element kit, both will not drink the water of filtered because element kit lost efficacy, and without the replacing in advance causing element kit, cause the waste of filter element。It adopts frame for movement prompting to change, it is not necessary to connecing electricity use, use cost is low, uses safer。
Highly preferred embodiment of the present invention illustrates, those of ordinary skill in the art the various changes made or remodeling are all without departing from the scope of the present invention。
Claims (1)
1. a mechanical filter element service life monitoring valve, include valve body (1), described valve body (1) offers water inlet (11) and outlet (12), aquaporin (1a) was formed between described water inlet (11) and outlet (12), described water inlet (11) is vertically arranged to the lower end of valve body (1), described outlet (12) is horizontally set at the right side of valve body (1), and described water inlet (11) and outlet (12) are vertical setting；Described crossing in aquaporin (1a) is provided with mechanism for monitoring, described mechanism for monitoring is by valve gap (2), elastic component (3) and cross the spool (4) of aquaporin (1a) for opening and closing, described valve gap (2) is fixed on valve body (1), described spool (4) was placed in aquaporin (1a), described elastic component (3) one end and valve gap (2) offset, its other end and spool (4) offset, described elastic component (3) is spring, described mechanism for monitoring is placed in the extension (13) of described valve body (1), described spool (4) be subject to hydraulic pressure impact and compression elastic piece (3) thus opened aquaporin (1a)；It is characterized in that: described spool (4) is provided with sealing gasket (5)；The unlatching pressure of described spool (4) is 0.05Mpa；The bottom of described valve gap (2) is shaped with Plug Division (21), and the upper end of described extension (13) is shaped with the inserting groove (13a) suitable with described Plug Division (21)；The upper end of described spool (4) is provided with the annular groove (41) suitable with described spring, and the lower end of described spring is embedded in annular groove (41)；The middle part of described spool (4) is shaped with gasket slot (42), and the inner circumferential of described sealing gasket (5) is placed in gasket slot (42)；The periphery of the lower end of described spool (4) is a conical surface (4a)；
Described inserting groove (13a) opening part is shaped with chamfering (13b)；Described water inlet (11) is connected with the outlet of element kit by water inlet pipe (61), is provided with the first O (71) between outer wall and water inlet (11) inwall of described water inlet pipe (61)；Described outlet (12) is connected with the import of depotition cock by outlet pipe (62), is provided with the second O (72) between outer wall and outlet (12) inwall of described outlet pipe (62)；Described water inlet (11) and outlet (12) are provided with end cap (8)；Mechanical filter element service life monitoring valve can utilize the characteristic prompting element kit of element kit to need to change；When the strainability of element kit is good, water through filter element for purifier assembly flows in valve body (1) by water inlet pipe (61), current flow up impact spool (4) in water inlet (11), spool (4) is subject to impact compression elastic piece (3), owing to the strainability of element kit is good, water penetration is high, enough water pressure pushing spools (4) can be produced and move upward thus opened aquaporin (1a), cross after aquaporin (1a) opens, current stream is through aquaporin (1a), and flowed out from depotition cock by outlet pipe (62)；When the strainability of element kit is good, the hydraulic pressure of generation is more than the unlatching pressure of spool (4), and hydraulic pressure is provided by water pipe pipe network；When element kit lost efficacy, owing to the water penetration of element kit declines, after element kit, hydraulic pressure can decline, now, produced hydraulic pressure is not enough to promote spool (4) to move upward thus opened aquaporin (1a), therefore, water will not be had to flow out from outlet (12)；When water cannot flow out from outlet (12), namely prompting element kit needs to change。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747792.4A CN103697174B (en) | 2013-12-31 | 2013-12-31 | A kind of mechanical filter element service life monitoring valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747792.4A CN103697174B (en) | 2013-12-31 | 2013-12-31 | A kind of mechanical filter element service life monitoring valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103697174A CN103697174A (en) | 2014-04-02 |
| CN103697174B true CN103697174B (en) | 2016-06-22 |
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| CN201310747792.4A Active CN103697174B (en) | 2013-12-31 | 2013-12-31 | A kind of mechanical filter element service life monitoring valve |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108325261B (en) * | 2018-04-20 | 2024-03-19 | 东莞市倍益清环保科技有限公司 | Life detection device in water purifier |
| CN114658378A (en) * | 2022-05-09 | 2022-06-24 | 中国铁建重工集团股份有限公司 | Directional coring tool and drilling machine valve control assembly thereof |
| CN115235978B (en) * | 2022-07-27 | 2023-10-24 | 江苏沁尔康环境电器有限公司 | Automatic testing arrangement of water purifier filter core |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB626211A (en) * | 1946-04-15 | 1949-07-12 | Main Water Heaters Ltd | Improvements in or relating to adjustable fluid flow-throttling devices |
| US4450861A (en) * | 1980-04-23 | 1984-05-29 | Daniel Bouteille | Compressed gas saving device |
| US5058623A (en) * | 1990-09-19 | 1991-10-22 | Blissfield Manufacturing Company | Valve assembly |
| CN201236974Y (en) * | 2008-07-22 | 2009-05-13 | 宁波星箭航天机械厂 | Non-return valve |
| CN201373144Y (en) * | 2009-01-06 | 2009-12-30 | 费斯托(中国)有限公司 | One-way valve |
| CN201715046U (en) * | 2010-04-30 | 2011-01-19 | 营口流体设备制造(集团)有限公司 | High-pressure water scale removal balance check valve |
| CN203627810U (en) * | 2013-12-31 | 2014-06-04 | 浙江沁园水处理科技有限公司 | Mechanical-type monitoring valve for life of filter element |
-
2013
- 2013-12-31 CN CN201310747792.4A patent/CN103697174B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB626211A (en) * | 1946-04-15 | 1949-07-12 | Main Water Heaters Ltd | Improvements in or relating to adjustable fluid flow-throttling devices |
| US4450861A (en) * | 1980-04-23 | 1984-05-29 | Daniel Bouteille | Compressed gas saving device |
| US5058623A (en) * | 1990-09-19 | 1991-10-22 | Blissfield Manufacturing Company | Valve assembly |
| CN201236974Y (en) * | 2008-07-22 | 2009-05-13 | 宁波星箭航天机械厂 | Non-return valve |
| CN201373144Y (en) * | 2009-01-06 | 2009-12-30 | 费斯托(中国)有限公司 | One-way valve |
| CN201715046U (en) * | 2010-04-30 | 2011-01-19 | 营口流体设备制造(集团)有限公司 | High-pressure water scale removal balance check valve |
| CN203627810U (en) * | 2013-12-31 | 2014-06-04 | 浙江沁园水处理科技有限公司 | Mechanical-type monitoring valve for life of filter element |
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| CN103697174A (en) | 2014-04-02 |
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